[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Minix shell port for busybox
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| 4 | *
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| 5 | * This version of the Minix shell was adapted for use in busybox
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| 6 | * by Erik Andersen <andersen@codepoet.org>
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| 7 | *
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| 8 | * - backtick expansion did not work properly
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| 9 | * Jonas Holmberg <jonas.holmberg@axis.com>
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| 10 | * Robert Schwebel <r.schwebel@pengutronix.de>
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| 11 | * Erik Andersen <andersen@codepoet.org>
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| 12 | *
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| 13 | * This program is free software; you can redistribute it and/or modify
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| 14 | * it under the terms of the GNU General Public License as published by
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| 15 | * the Free Software Foundation; either version 2 of the License, or
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| 16 | * (at your option) any later version.
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| 17 | *
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| 18 | * This program is distributed in the hope that it will be useful,
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| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 21 | * General Public License for more details.
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| 22 | *
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| 23 | * You should have received a copy of the GNU General Public License
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| 24 | * along with this program; if not, write to the Free Software
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| 25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 26 | *
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| 27 | * Original copyright notice is retained at the end of this file.
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| 28 | */
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| 29 |
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| 30 | #include "busybox.h"
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| 31 | #include <ctype.h>
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| 32 | #include <dirent.h>
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| 33 | #include <errno.h>
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| 34 | #include <fcntl.h>
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| 35 | #include <limits.h>
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| 36 | #include <setjmp.h>
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| 37 | #include <signal.h>
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| 38 | #include <stddef.h>
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| 39 | #include <stdio.h>
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| 40 | #include <stdlib.h>
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| 41 | #include <string.h>
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| 42 | #include <time.h>
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| 43 | #include <unistd.h>
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| 44 | #include <sys/stat.h>
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| 45 | #include <sys/times.h>
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| 46 | #include <sys/types.h>
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| 47 | #include <sys/wait.h>
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| 48 |
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| 49 | #include "cmdedit.h"
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| 50 |
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| 51 |
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| 52 | /* Conditional use of "register" keyword */
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| 53 | #define REGISTER register
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| 54 |
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| 55 |
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| 56 | /*#define MSHDEBUG 1*/
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| 57 |
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| 58 | #ifdef MSHDEBUG
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| 59 | int mshdbg = MSHDEBUG;
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| 60 |
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| 61 | #define DBGPRINTF(x) if(mshdbg>0)printf x
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| 62 | #define DBGPRINTF0(x) if(mshdbg>0)printf x
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| 63 | #define DBGPRINTF1(x) if(mshdbg>1)printf x
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| 64 | #define DBGPRINTF2(x) if(mshdbg>2)printf x
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| 65 | #define DBGPRINTF3(x) if(mshdbg>3)printf x
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| 66 | #define DBGPRINTF4(x) if(mshdbg>4)printf x
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| 67 | #define DBGPRINTF5(x) if(mshdbg>5)printf x
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| 68 | #define DBGPRINTF6(x) if(mshdbg>6)printf x
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| 69 | #define DBGPRINTF7(x) if(mshdbg>7)printf x
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| 70 | #define DBGPRINTF8(x) if(mshdbg>8)printf x
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| 71 | #define DBGPRINTF9(x) if(mshdbg>9)printf x
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| 72 |
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| 73 | int mshdbg_rc = 0;
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| 74 |
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| 75 | #define RCPRINTF(x) if(mshdbg_rc)printf x
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| 76 |
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| 77 | #else
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| 78 |
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| 79 | #define DBGPRINTF(x)
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| 80 | #define DBGPRINTF0(x)
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| 81 | #define DBGPRINTF1(x)
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| 82 | #define DBGPRINTF2(x)
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| 83 | #define DBGPRINTF3(x)
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| 84 | #define DBGPRINTF4(x)
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| 85 | #define DBGPRINTF5(x)
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| 86 | #define DBGPRINTF6(x)
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| 87 | #define DBGPRINTF7(x)
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| 88 | #define DBGPRINTF8(x)
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| 89 | #define DBGPRINTF9(x)
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| 90 |
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| 91 | #define RCPRINTF(x)
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| 92 |
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| 93 | #endif /* MSHDEBUG */
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| 94 |
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| 95 |
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| 96 | #ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
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| 97 | # define DEFAULT_ROOT_PROMPT "\\u:\\w> "
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| 98 | # define DEFAULT_USER_PROMPT "\\u:\\w$ "
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| 99 | #else
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| 100 | # define DEFAULT_ROOT_PROMPT "# "
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| 101 | # define DEFAULT_USER_PROMPT "$ "
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| 102 | #endif
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| 103 |
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| 104 |
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| 105 | /* -------- sh.h -------- */
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| 106 | /*
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| 107 | * shell
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| 108 | */
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| 109 |
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| 110 | #define LINELIM 2100
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| 111 | #define NPUSH 8 /* limit to input nesting */
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| 112 |
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| 113 | #undef NOFILE
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| 114 | #define NOFILE 20 /* Number of open files */
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| 115 | #define NUFILE 10 /* Number of user-accessible files */
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| 116 | #define FDBASE 10 /* First file usable by Shell */
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| 117 |
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| 118 | /*
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| 119 | * values returned by wait
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| 120 | */
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| 121 | #define WAITSIG(s) ((s)&0177)
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| 122 | #define WAITVAL(s) (((s)>>8)&0377)
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| 123 | #define WAITCORE(s) (((s)&0200)!=0)
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| 124 |
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| 125 | /*
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| 126 | * library and system definitions
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| 127 | */
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| 128 | typedef void xint; /* base type of jmp_buf, for not broken compilers */
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| 129 |
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| 130 | /*
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| 131 | * shell components
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| 132 | */
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| 133 |
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| 134 | #define QUOTE 0200
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| 135 |
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| 136 | #define NOBLOCK ((struct op *)NULL)
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| 137 | #define NOWORD ((char *)NULL)
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| 138 | #define NOWORDS ((char **)NULL)
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| 139 | #define NOPIPE ((int *)NULL)
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| 140 |
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| 141 | /*
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| 142 | * Description of a command or an operation on commands.
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| 143 | * Might eventually use a union.
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| 144 | */
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| 145 | struct op {
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| 146 | int type; /* operation type, see below */
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| 147 | char **words; /* arguments to a command */
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| 148 | struct ioword **ioact; /* IO actions (eg, < > >>) */
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| 149 | struct op *left;
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| 150 | struct op *right;
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| 151 | char *str; /* identifier for case and for */
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| 152 | };
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| 153 |
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| 154 | #define TCOM 1 /* command */
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| 155 | #define TPAREN 2 /* (c-list) */
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| 156 | #define TPIPE 3 /* a | b */
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| 157 | #define TLIST 4 /* a [&;] b */
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| 158 | #define TOR 5 /* || */
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| 159 | #define TAND 6 /* && */
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| 160 | #define TFOR 7
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| 161 | #define TDO 8
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| 162 | #define TCASE 9
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| 163 | #define TIF 10
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| 164 | #define TWHILE 11
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| 165 | #define TUNTIL 12
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| 166 | #define TELIF 13
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| 167 | #define TPAT 14 /* pattern in case */
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| 168 | #define TBRACE 15 /* {c-list} */
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| 169 | #define TASYNC 16 /* c & */
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| 170 | /* Added to support "." file expansion */
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| 171 | #define TDOT 17
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| 172 |
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| 173 | /* Strings for names to make debug easier */
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| 174 | #ifdef MSHDEBUG
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| 175 | static char *T_CMD_NAMES[] = {
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| 176 | "PLACEHOLDER",
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| 177 | "TCOM",
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| 178 | "TPAREN",
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| 179 | "TPIPE",
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| 180 | "TLIST",
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| 181 | "TOR",
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| 182 | "TAND",
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| 183 | "TFOR",
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| 184 | "TDO",
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| 185 | "TCASE",
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| 186 | "TIF",
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| 187 | "TWHILE",
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| 188 | "TUNTIL",
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| 189 | "TELIF",
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| 190 | "TPAT",
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| 191 | "TBRACE",
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| 192 | "TASYNC",
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| 193 | "TDOT",
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| 194 | };
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| 195 | #endif
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| 196 |
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| 197 | /*
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| 198 | * actions determining the environment of a process
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| 199 | */
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| 200 | #define BIT(i) (1<<(i))
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| 201 | #define FEXEC BIT(0) /* execute without forking */
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| 202 |
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| 203 | #if 0 /* Original value */
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| 204 | #define AREASIZE (65000)
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| 205 | #else
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| 206 | #define AREASIZE (90000)
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| 207 | #endif
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| 208 |
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| 209 | /*
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| 210 | * flags to control evaluation of words
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| 211 | */
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| 212 | #define DOSUB 1 /* interpret $, `, and quotes */
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| 213 | #define DOBLANK 2 /* perform blank interpretation */
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| 214 | #define DOGLOB 4 /* interpret [?* */
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| 215 | #define DOKEY 8 /* move words with `=' to 2nd arg. list */
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| 216 | #define DOTRIM 16 /* trim resulting string */
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| 217 |
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| 218 | #define DOALL (DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM)
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| 219 |
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| 220 |
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| 221 | /* PROTOTYPES */
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| 222 | static int newfile(char *s);
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| 223 | static char *findeq(char *cp);
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| 224 | static char *cclass(char *p, int sub);
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| 225 | static void initarea(void);
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| 226 | extern int msh_main(int argc, char **argv);
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| 227 |
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| 228 |
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| 229 | struct brkcon {
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| 230 | jmp_buf brkpt;
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| 231 | struct brkcon *nextlev;
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| 232 | };
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| 233 |
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| 234 |
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| 235 | /*
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| 236 | * redirection
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| 237 | */
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| 238 | struct ioword {
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| 239 | short io_unit; /* unit affected */
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| 240 | short io_flag; /* action (below) */
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| 241 | char *io_name; /* file name */
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| 242 | };
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| 243 |
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| 244 | #define IOREAD 1 /* < */
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| 245 | #define IOHERE 2 /* << (here file) */
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| 246 | #define IOWRITE 4 /* > */
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| 247 | #define IOCAT 8 /* >> */
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| 248 | #define IOXHERE 16 /* ${}, ` in << */
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| 249 | #define IODUP 32 /* >&digit */
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| 250 | #define IOCLOSE 64 /* >&- */
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| 251 |
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| 252 | #define IODEFAULT (-1) /* token for default IO unit */
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| 253 |
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| 254 |
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| 255 |
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| 256 | /*
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| 257 | * parsing & execution environment
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| 258 | */
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| 259 | static struct env {
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| 260 | char *linep;
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| 261 | struct io *iobase;
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| 262 | struct io *iop;
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| 263 | xint *errpt; /* void * */
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| 264 | int iofd;
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| 265 | struct env *oenv;
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| 266 | } e;
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| 267 |
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| 268 | /*
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| 269 | * flags:
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| 270 | * -e: quit on error
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| 271 | * -k: look for name=value everywhere on command line
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| 272 | * -n: no execution
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| 273 | * -t: exit after reading and executing one command
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| 274 | * -v: echo as read
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| 275 | * -x: trace
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| 276 | * -u: unset variables net diagnostic
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| 277 | */
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| 278 | static char *flag;
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| 279 |
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| 280 | static char *null; /* null value for variable */
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| 281 | static int intr; /* interrupt pending */
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| 282 |
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| 283 | static char *trap[_NSIG + 1];
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| 284 | static char ourtrap[_NSIG + 1];
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| 285 | static int trapset; /* trap pending */
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| 286 |
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| 287 | static int heedint; /* heed interrupt signals */
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| 288 |
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| 289 | static int yynerrs; /* yacc */
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| 290 |
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| 291 | static char line[LINELIM];
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| 292 | static char *elinep;
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| 293 |
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| 294 |
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| 295 | /*
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| 296 | * other functions
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| 297 | */
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| 298 | static int (*inbuilt(char *s)) (struct op *);
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| 299 |
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| 300 | static char *rexecve(char *c, char **v, char **envp);
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| 301 | static char *space(int n);
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| 302 | static char *strsave(char *s, int a);
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| 303 | static char *evalstr(char *cp, int f);
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| 304 | static char *putn(int n);
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| 305 | static char *itoa(int n);
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| 306 | static char *unquote(char *as);
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| 307 | static struct var *lookup(char *n);
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| 308 | static int rlookup(char *n);
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| 309 | static struct wdblock *glob(char *cp, struct wdblock *wb);
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| 310 | static int my_getc(int ec);
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| 311 | static int subgetc(char ec, int quoted);
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| 312 | static char **makenv(int all, struct wdblock *wb);
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| 313 | static char **eval(char **ap, int f);
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| 314 | static int setstatus(int s);
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| 315 | static int waitfor(int lastpid, int canintr);
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| 316 |
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| 317 | static void onintr(int s); /* SIGINT handler */
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| 318 |
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| 319 | static int newenv(int f);
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| 320 | static void quitenv(void);
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| 321 | static void err(char *s);
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| 322 | static int anys(char *s1, char *s2);
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| 323 | static int any(int c, char *s);
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| 324 | static void next(int f);
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| 325 | static void setdash(void);
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| 326 | static void onecommand(void);
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| 327 | static void runtrap(int i);
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| 328 | static int gmatch(char *s, char *p);
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| 329 |
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| 330 |
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| 331 | /*
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| 332 | * error handling
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| 333 | */
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| 334 | static void leave(void); /* abort shell (or fail in subshell) */
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| 335 | static void fail(void); /* fail but return to process next command */
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| 336 | static void warn(char *s);
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| 337 | static void sig(int i); /* default signal handler */
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| 338 |
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| 339 |
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| 340 |
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| 341 | /* -------- area stuff -------- */
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| 342 |
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| 343 | #define REGSIZE sizeof(struct region)
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| 344 | #define GROWBY (256)
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| 345 | /* #define SHRINKBY (64) */
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| 346 | #undef SHRINKBY
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| 347 | #define FREE (32767)
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| 348 | #define BUSY (0)
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| 349 | #define ALIGN (sizeof(int)-1)
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| 350 |
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| 351 |
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| 352 | struct region {
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| 353 | struct region *next;
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| 354 | int area;
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| 355 | };
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| 356 |
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| 357 |
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| 358 |
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| 359 | /* -------- grammar stuff -------- */
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| 360 | typedef union {
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| 361 | char *cp;
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| 362 | char **wp;
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| 363 | int i;
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| 364 | struct op *o;
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| 365 | } YYSTYPE;
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| 366 |
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| 367 | #define WORD 256
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| 368 | #define LOGAND 257
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| 369 | #define LOGOR 258
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| 370 | #define BREAK 259
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| 371 | #define IF 260
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| 372 | #define THEN 261
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| 373 | #define ELSE 262
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| 374 | #define ELIF 263
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| 375 | #define FI 264
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| 376 | #define CASE 265
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| 377 | #define ESAC 266
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| 378 | #define FOR 267
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| 379 | #define WHILE 268
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| 380 | #define UNTIL 269
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| 381 | #define DO 270
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| 382 | #define DONE 271
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| 383 | #define IN 272
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| 384 | /* Added for "." file expansion */
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| 385 | #define DOT 273
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| 386 |
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| 387 | #define YYERRCODE 300
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| 388 |
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| 389 | /* flags to yylex */
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| 390 | #define CONTIN 01 /* skip new lines to complete command */
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| 391 |
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| 392 | #define SYNTAXERR zzerr()
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| 393 |
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| 394 | static struct op *pipeline(int cf);
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| 395 | static struct op *andor(void);
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| 396 | static struct op *c_list(void);
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| 397 | static int synio(int cf);
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| 398 | static void musthave(int c, int cf);
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| 399 | static struct op *simple(void);
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| 400 | static struct op *nested(int type, int mark);
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| 401 | static struct op *command(int cf);
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| 402 | static struct op *dogroup(int onlydone);
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| 403 | static struct op *thenpart(void);
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| 404 | static struct op *elsepart(void);
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| 405 | static struct op *caselist(void);
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| 406 | static struct op *casepart(void);
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| 407 | static char **pattern(void);
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| 408 | static char **wordlist(void);
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| 409 | static struct op *list(struct op *t1, struct op *t2);
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| 410 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp);
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| 411 | static struct op *newtp(void);
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| 412 | static struct op *namelist(struct op *t);
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| 413 | static char **copyw(void);
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| 414 | static void word(char *cp);
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| 415 | static struct ioword **copyio(void);
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| 416 | static struct ioword *io(int u, int f, char *cp);
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| 417 | static void zzerr(void);
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| 418 | static void yyerror(char *s);
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| 419 | static int yylex(int cf);
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| 420 | static int collect(int c, int c1);
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| 421 | static int dual(int c);
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| 422 | static void diag(int ec);
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| 423 | static char *tree(unsigned size);
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| 424 |
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| 425 | /* -------- var.h -------- */
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| 426 |
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| 427 | struct var {
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| 428 | char *value;
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| 429 | char *name;
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| 430 | struct var *next;
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| 431 | char status;
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| 432 | };
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| 433 |
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| 434 | #define COPYV 1 /* flag to setval, suggesting copy */
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| 435 | #define RONLY 01 /* variable is read-only */
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| 436 | #define EXPORT 02 /* variable is to be exported */
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| 437 | #define GETCELL 04 /* name & value space was got with getcell */
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| 438 |
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| 439 | static int yyparse(void);
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| 440 | static struct var *lookup(char *n);
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| 441 | static void setval(struct var *vp, char *val);
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| 442 | static void nameval(struct var *vp, char *val, char *name);
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| 443 | static void export(struct var *vp);
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| 444 | static void ronly(struct var *vp);
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| 445 | static int isassign(char *s);
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| 446 | static int checkname(char *cp);
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| 447 | static int assign(char *s, int cf);
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| 448 | static void putvlist(int f, int out);
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| 449 | static int eqname(char *n1, char *n2);
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| 450 |
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| 451 | static int execute(struct op *t, int *pin, int *pout, int act);
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| 452 |
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| 453 |
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| 454 | /* -------- io.h -------- */
|
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| 455 | /* io buffer */
|
---|
| 456 | struct iobuf {
|
---|
| 457 | unsigned id; /* buffer id */
|
---|
| 458 | char buf[512]; /* buffer */
|
---|
| 459 | char *bufp; /* pointer into buffer */
|
---|
| 460 | char *ebufp; /* pointer to end of buffer */
|
---|
| 461 | };
|
---|
| 462 |
|
---|
| 463 | /* possible arguments to an IO function */
|
---|
| 464 | struct ioarg {
|
---|
| 465 | char *aword;
|
---|
| 466 | char **awordlist;
|
---|
| 467 | int afile; /* file descriptor */
|
---|
| 468 | unsigned afid; /* buffer id */
|
---|
| 469 | long afpos; /* file position */
|
---|
| 470 | struct iobuf *afbuf; /* buffer for this file */
|
---|
| 471 | };
|
---|
| 472 |
|
---|
| 473 | //static struct ioarg ioargstack[NPUSH];
|
---|
| 474 | #define AFID_NOBUF (~0)
|
---|
| 475 | #define AFID_ID 0
|
---|
| 476 |
|
---|
| 477 | /* an input generator's state */
|
---|
| 478 | struct io {
|
---|
| 479 | int (*iofn) (struct ioarg *, struct io *);
|
---|
| 480 | struct ioarg *argp;
|
---|
| 481 | int peekc;
|
---|
| 482 | char prev; /* previous character read by readc() */
|
---|
| 483 | char nlcount; /* for `'s */
|
---|
| 484 | char xchar; /* for `'s */
|
---|
| 485 | char task; /* reason for pushed IO */
|
---|
| 486 | };
|
---|
| 487 |
|
---|
| 488 | //static struct io iostack[NPUSH];
|
---|
| 489 | #define XOTHER 0 /* none of the below */
|
---|
| 490 | #define XDOLL 1 /* expanding ${} */
|
---|
| 491 | #define XGRAVE 2 /* expanding `'s */
|
---|
| 492 | #define XIO 3 /* file IO */
|
---|
| 493 |
|
---|
| 494 | /* in substitution */
|
---|
| 495 | #define INSUB() (e.iop->task == XGRAVE || e.iop->task == XDOLL)
|
---|
| 496 |
|
---|
| 497 |
|
---|
| 498 | /*
|
---|
| 499 | * input generators for IO structure
|
---|
| 500 | */
|
---|
| 501 | static int nlchar(struct ioarg *ap);
|
---|
| 502 | static int strchar(struct ioarg *ap);
|
---|
| 503 | static int qstrchar(struct ioarg *ap);
|
---|
| 504 | static int filechar(struct ioarg *ap);
|
---|
| 505 | static int herechar(struct ioarg *ap);
|
---|
| 506 | static int linechar(struct ioarg *ap);
|
---|
| 507 | static int gravechar(struct ioarg *ap, struct io *iop);
|
---|
| 508 | static int qgravechar(struct ioarg *ap, struct io *iop);
|
---|
| 509 | static int dolchar(struct ioarg *ap);
|
---|
| 510 | static int wdchar(struct ioarg *ap);
|
---|
| 511 | static void scraphere(void);
|
---|
| 512 | static void freehere(int area);
|
---|
| 513 | static void gethere(void);
|
---|
| 514 | static void markhere(char *s, struct ioword *iop);
|
---|
| 515 | static int herein(char *hname, int xdoll);
|
---|
| 516 | static int run(struct ioarg *argp, int (*f) (struct ioarg *));
|
---|
| 517 |
|
---|
| 518 |
|
---|
| 519 | /*
|
---|
| 520 | * IO functions
|
---|
| 521 | */
|
---|
| 522 | static int eofc(void);
|
---|
| 523 | static int readc(void);
|
---|
| 524 | static void unget(int c);
|
---|
| 525 | static void ioecho(char c);
|
---|
| 526 | static void prs(const char *s);
|
---|
| 527 | static void prn(unsigned u);
|
---|
| 528 | static void closef(int i);
|
---|
| 529 | static void closeall(void);
|
---|
| 530 |
|
---|
| 531 |
|
---|
| 532 | /*
|
---|
| 533 | * IO control
|
---|
| 534 | */
|
---|
| 535 | static void pushio(struct ioarg *argp, int (*f) (struct ioarg *));
|
---|
| 536 | static int remap(int fd);
|
---|
| 537 | static int openpipe(int *pv);
|
---|
| 538 | static void closepipe(int *pv);
|
---|
| 539 | static struct io *setbase(struct io *ip);
|
---|
| 540 |
|
---|
| 541 | #define PUSHIO(what,arg,gen) ((temparg.what = (arg)),pushio(&temparg,(gen)))
|
---|
| 542 | #define RUN(what,arg,gen) ((temparg.what = (arg)), run(&temparg,(gen)))
|
---|
| 543 |
|
---|
| 544 | /* -------- word.h -------- */
|
---|
| 545 |
|
---|
| 546 | #define NSTART 16 /* default number of words to allow for initially */
|
---|
| 547 |
|
---|
| 548 | struct wdblock {
|
---|
| 549 | short w_bsize;
|
---|
| 550 | short w_nword;
|
---|
| 551 | /* bounds are arbitrary */
|
---|
| 552 | char *w_words[1];
|
---|
| 553 | };
|
---|
| 554 |
|
---|
| 555 | static struct wdblock *addword(char *wd, struct wdblock *wb);
|
---|
| 556 | static struct wdblock *newword(int nw);
|
---|
| 557 | static char **getwords(struct wdblock *wb);
|
---|
| 558 |
|
---|
| 559 | /* -------- area.h -------- */
|
---|
| 560 |
|
---|
| 561 | /*
|
---|
| 562 | * storage allocation
|
---|
| 563 | */
|
---|
| 564 | static char *getcell(unsigned nbytes);
|
---|
| 565 | static void garbage(void);
|
---|
| 566 | static void setarea(char *cp, int a);
|
---|
| 567 | static int getarea(char *cp);
|
---|
| 568 | static void freearea(int a);
|
---|
| 569 | static void freecell(char *cp);
|
---|
| 570 | static int areanum; /* current allocation area */
|
---|
| 571 |
|
---|
| 572 | #define NEW(type) (type *)getcell(sizeof(type))
|
---|
| 573 | #define DELETE(obj) freecell((char *)obj)
|
---|
| 574 |
|
---|
| 575 |
|
---|
| 576 | /* -------- misc stuff -------- */
|
---|
| 577 |
|
---|
| 578 | static int forkexec(struct op *t, int *pin, int *pout, int act, char **wp);
|
---|
| 579 | static int iosetup(struct ioword *iop, int pipein, int pipeout);
|
---|
| 580 | static void echo(char **wp);
|
---|
| 581 | static struct op **find1case(struct op *t, char *w);
|
---|
| 582 | static struct op *findcase(struct op *t, char *w);
|
---|
| 583 | static void brkset(struct brkcon *bc);
|
---|
| 584 | static int dolabel(struct op *t);
|
---|
| 585 | static int dohelp(struct op *t);
|
---|
| 586 | static int dochdir(struct op *t);
|
---|
| 587 | static int doshift(struct op *t);
|
---|
| 588 | static int dologin(struct op *t);
|
---|
| 589 | static int doumask(struct op *t);
|
---|
| 590 | static int doexec(struct op *t);
|
---|
| 591 | static int dodot(struct op *t);
|
---|
| 592 | static int dowait(struct op *t);
|
---|
| 593 | static int doread(struct op *t);
|
---|
| 594 | static int doeval(struct op *t);
|
---|
| 595 | static int dotrap(struct op *t);
|
---|
| 596 | static int getsig(char *s);
|
---|
| 597 | static void setsig(int n, sighandler_t f);
|
---|
| 598 | static int getn(char *as);
|
---|
| 599 | static int dobreak(struct op *t);
|
---|
| 600 | static int docontinue(struct op *t);
|
---|
| 601 | static int brkcontin(char *cp, int val);
|
---|
| 602 | static int doexit(struct op *t);
|
---|
| 603 | static int doexport(struct op *t);
|
---|
| 604 | static int doreadonly(struct op *t);
|
---|
| 605 | static void rdexp(char **wp, void (*f) (struct var *), int key);
|
---|
| 606 | static void badid(char *s);
|
---|
| 607 | static int doset(struct op *t);
|
---|
| 608 | static void varput(char *s, int out);
|
---|
| 609 | static int dotimes(struct op *t);
|
---|
| 610 | static int expand(char *cp, struct wdblock **wbp, int f);
|
---|
| 611 | static char *blank(int f);
|
---|
| 612 | static int dollar(int quoted);
|
---|
| 613 | static int grave(int quoted);
|
---|
| 614 | static void globname(char *we, char *pp);
|
---|
| 615 | static char *generate(char *start1, char *end1, char *middle, char *end);
|
---|
| 616 | static int anyspcl(struct wdblock *wb);
|
---|
| 617 | static int xstrcmp(char *p1, char *p2);
|
---|
| 618 | static void glob0(char *a0, unsigned int a1, int a2,
|
---|
| 619 | int (*a3) (char *, char *));
|
---|
| 620 | static void glob1(char *base, char *lim);
|
---|
| 621 | static void glob2(char *i, char *j);
|
---|
| 622 | static void glob3(char *i, char *j, char *k);
|
---|
| 623 | static void readhere(char **name, char *s, int ec);
|
---|
| 624 | static void pushio(struct ioarg *argp, int (*f) (struct ioarg *));
|
---|
| 625 | static int xxchar(struct ioarg *ap);
|
---|
| 626 |
|
---|
| 627 | struct here {
|
---|
| 628 | char *h_tag;
|
---|
| 629 | int h_dosub;
|
---|
| 630 | struct ioword *h_iop;
|
---|
| 631 | struct here *h_next;
|
---|
| 632 | };
|
---|
| 633 |
|
---|
| 634 | static const char * const signame[] = {
|
---|
| 635 | "Signal 0",
|
---|
| 636 | "Hangup",
|
---|
| 637 | (char *) NULL, /* interrupt */
|
---|
| 638 | "Quit",
|
---|
| 639 | "Illegal instruction",
|
---|
| 640 | "Trace/BPT trap",
|
---|
| 641 | "Abort",
|
---|
| 642 | "Bus error",
|
---|
| 643 | "Floating Point Exception",
|
---|
| 644 | "Killed",
|
---|
| 645 | "SIGUSR1",
|
---|
| 646 | "SIGSEGV",
|
---|
| 647 | "SIGUSR2",
|
---|
| 648 | (char *) NULL, /* broken pipe */
|
---|
| 649 | "Alarm clock",
|
---|
| 650 | "Terminated",
|
---|
| 651 | };
|
---|
| 652 |
|
---|
| 653 | #define NSIGNAL (sizeof(signame)/sizeof(signame[0]))
|
---|
| 654 |
|
---|
| 655 | struct res {
|
---|
| 656 | const char *r_name;
|
---|
| 657 | int r_val;
|
---|
| 658 | };
|
---|
| 659 | static const struct res restab[] = {
|
---|
| 660 | {"for", FOR},
|
---|
| 661 | {"case", CASE},
|
---|
| 662 | {"esac", ESAC},
|
---|
| 663 | {"while", WHILE},
|
---|
| 664 | {"do", DO},
|
---|
| 665 | {"done", DONE},
|
---|
| 666 | {"if", IF},
|
---|
| 667 | {"in", IN},
|
---|
| 668 | {"then", THEN},
|
---|
| 669 | {"else", ELSE},
|
---|
| 670 | {"elif", ELIF},
|
---|
| 671 | {"until", UNTIL},
|
---|
| 672 | {"fi", FI},
|
---|
| 673 | {";;", BREAK},
|
---|
| 674 | {"||", LOGOR},
|
---|
| 675 | {"&&", LOGAND},
|
---|
| 676 | {"{", '{'},
|
---|
| 677 | {"}", '}'},
|
---|
| 678 | {".", DOT},
|
---|
| 679 | {0, 0},
|
---|
| 680 | };
|
---|
| 681 |
|
---|
| 682 |
|
---|
| 683 | struct builtincmd {
|
---|
| 684 | const char *name;
|
---|
| 685 | int (*builtinfunc) (struct op * t);
|
---|
| 686 | };
|
---|
| 687 | static const struct builtincmd builtincmds[] = {
|
---|
| 688 | {".", dodot},
|
---|
| 689 | {":", dolabel},
|
---|
| 690 | {"break", dobreak},
|
---|
| 691 | {"cd", dochdir},
|
---|
| 692 | {"continue", docontinue},
|
---|
| 693 | {"eval", doeval},
|
---|
| 694 | {"exec", doexec},
|
---|
| 695 | {"exit", doexit},
|
---|
| 696 | {"export", doexport},
|
---|
| 697 | {"help", dohelp},
|
---|
| 698 | {"login", dologin},
|
---|
| 699 | {"newgrp", dologin},
|
---|
| 700 | {"read", doread},
|
---|
| 701 | {"readonly", doreadonly},
|
---|
| 702 | {"set", doset},
|
---|
| 703 | {"shift", doshift},
|
---|
| 704 | {"times", dotimes},
|
---|
| 705 | {"trap", dotrap},
|
---|
| 706 | {"umask", doumask},
|
---|
| 707 | {"wait", dowait},
|
---|
| 708 | {0, 0}
|
---|
| 709 | };
|
---|
| 710 |
|
---|
| 711 | static struct op *scantree(struct op *);
|
---|
| 712 | static struct op *dowholefile(int, int);
|
---|
| 713 |
|
---|
| 714 | /* Globals */
|
---|
| 715 | extern char **environ; /* environment pointer */
|
---|
| 716 |
|
---|
| 717 | static char **dolv;
|
---|
| 718 | static int dolc;
|
---|
| 719 | static int exstat;
|
---|
| 720 | static char gflg;
|
---|
| 721 | static int interactive; /* Is this an interactive shell */
|
---|
| 722 | static int execflg;
|
---|
| 723 | static int multiline; /* \n changed to ; */
|
---|
| 724 | static struct op *outtree; /* result from parser */
|
---|
| 725 | static xint *failpt;
|
---|
| 726 | static xint *errpt;
|
---|
| 727 | static struct brkcon *brklist;
|
---|
| 728 | static int isbreak;
|
---|
| 729 | static struct wdblock *wdlist;
|
---|
| 730 | static struct wdblock *iolist;
|
---|
| 731 | static char *trap[_NSIG + 1];
|
---|
| 732 | static char ourtrap[_NSIG + 1];
|
---|
| 733 | static int trapset; /* trap pending */
|
---|
| 734 | static int yynerrs; /* yacc */
|
---|
| 735 | static char line[LINELIM];
|
---|
| 736 |
|
---|
| 737 | #ifdef MSHDEBUG
|
---|
| 738 | static struct var *mshdbg_var;
|
---|
| 739 | #endif
|
---|
| 740 | static struct var *vlist; /* dictionary */
|
---|
| 741 | static struct var *homedir; /* home directory */
|
---|
| 742 | static struct var *prompt; /* main prompt */
|
---|
| 743 | static struct var *cprompt; /* continuation prompt */
|
---|
| 744 | static struct var *path; /* search path for commands */
|
---|
| 745 | static struct var *shell; /* shell to interpret command files */
|
---|
| 746 | static struct var *ifs; /* field separators */
|
---|
| 747 |
|
---|
| 748 | static int areanum; /* current allocation area */
|
---|
| 749 | static int intr;
|
---|
| 750 | static int inparse;
|
---|
| 751 | static char flags['z' - 'a' + 1];
|
---|
| 752 | static char *flag = flags - 'a';
|
---|
| 753 | static char *null = "";
|
---|
| 754 | static int heedint = 1;
|
---|
| 755 | static void (*qflag) (int) = SIG_IGN;
|
---|
| 756 | static int startl;
|
---|
| 757 | static int peeksym;
|
---|
| 758 | static int nlseen;
|
---|
| 759 | static int iounit = IODEFAULT;
|
---|
| 760 | static YYSTYPE yylval;
|
---|
| 761 | static char *elinep = line + sizeof(line) - 5;
|
---|
| 762 |
|
---|
| 763 | static struct ioarg temparg = { 0, 0, 0, AFID_NOBUF, 0 }; /* temporary for PUSHIO */
|
---|
| 764 | static struct ioarg ioargstack[NPUSH];
|
---|
| 765 | static struct io iostack[NPUSH];
|
---|
| 766 | static struct iobuf sharedbuf = { AFID_NOBUF };
|
---|
| 767 | static struct iobuf mainbuf = { AFID_NOBUF };
|
---|
| 768 | static unsigned bufid = AFID_ID; /* buffer id counter */
|
---|
| 769 |
|
---|
| 770 | static struct here *inhere; /* list of hear docs while parsing */
|
---|
| 771 | static struct here *acthere; /* list of active here documents */
|
---|
| 772 | static struct region *areabot; /* bottom of area */
|
---|
| 773 | static struct region *areatop; /* top of area */
|
---|
| 774 | static struct region *areanxt; /* starting point of scan */
|
---|
| 775 | static void *brktop;
|
---|
| 776 | static void *brkaddr;
|
---|
| 777 |
|
---|
| 778 | static struct env e = {
|
---|
| 779 | line, /* linep: char ptr */
|
---|
| 780 | iostack, /* iobase: struct io ptr */
|
---|
| 781 | iostack - 1, /* iop: struct io ptr */
|
---|
| 782 | (xint *) NULL, /* errpt: void ptr for errors? */
|
---|
| 783 | FDBASE, /* iofd: file desc */
|
---|
| 784 | (struct env *) NULL /* oenv: struct env ptr */
|
---|
| 785 | };
|
---|
| 786 |
|
---|
| 787 | #ifdef MSHDEBUG
|
---|
| 788 | void print_t(struct op *t);
|
---|
| 789 | void print_t(struct op *t)
|
---|
| 790 | {
|
---|
| 791 | DBGPRINTF(("T: t=%p, type %s, words=%p, IOword=%p\n", t,
|
---|
| 792 | T_CMD_NAMES[t->type], t->words, t->ioact));
|
---|
| 793 |
|
---|
| 794 | if (t->words) {
|
---|
| 795 | DBGPRINTF(("T: W1: %s", t->words[0]));
|
---|
| 796 | }
|
---|
| 797 |
|
---|
| 798 | return;
|
---|
| 799 | }
|
---|
| 800 |
|
---|
| 801 | void print_tree(struct op *head);
|
---|
| 802 | void print_tree(struct op *head)
|
---|
| 803 | {
|
---|
| 804 | if (head == NULL) {
|
---|
| 805 | DBGPRINTF(("PRINT_TREE: no tree\n"));
|
---|
| 806 | return;
|
---|
| 807 | }
|
---|
| 808 |
|
---|
| 809 | DBGPRINTF(("NODE: %p, left %p, right %p\n", head, head->left,
|
---|
| 810 | head->right));
|
---|
| 811 |
|
---|
| 812 | if (head->left)
|
---|
| 813 | print_tree(head->left);
|
---|
| 814 |
|
---|
| 815 | if (head->right)
|
---|
| 816 | print_tree(head->right);
|
---|
| 817 |
|
---|
| 818 | return;
|
---|
| 819 | }
|
---|
| 820 | #endif /* MSHDEBUG */
|
---|
| 821 |
|
---|
| 822 |
|
---|
| 823 | #ifdef CONFIG_FEATURE_COMMAND_EDITING
|
---|
| 824 | static char *current_prompt;
|
---|
| 825 | #endif
|
---|
| 826 |
|
---|
| 827 | /* -------- sh.c -------- */
|
---|
| 828 | /*
|
---|
| 829 | * shell
|
---|
| 830 | */
|
---|
| 831 |
|
---|
| 832 |
|
---|
| 833 | int msh_main(int argc, char **argv)
|
---|
| 834 | {
|
---|
| 835 | REGISTER int f;
|
---|
| 836 | REGISTER char *s;
|
---|
| 837 | int cflag;
|
---|
| 838 | char *name, **ap;
|
---|
| 839 | int (*iof) (struct ioarg *);
|
---|
| 840 |
|
---|
| 841 | DBGPRINTF(("MSH_MAIN: argc %d, environ %p\n", argc, environ));
|
---|
| 842 |
|
---|
| 843 | initarea();
|
---|
| 844 | if ((ap = environ) != NULL) {
|
---|
| 845 | while (*ap)
|
---|
| 846 | assign(*ap++, !COPYV);
|
---|
| 847 | for (ap = environ; *ap;)
|
---|
| 848 | export(lookup(*ap++));
|
---|
| 849 | }
|
---|
| 850 | closeall();
|
---|
| 851 | areanum = 1;
|
---|
| 852 |
|
---|
| 853 | shell = lookup("SHELL");
|
---|
| 854 | if (shell->value == null)
|
---|
| 855 | setval(shell, (char *)DEFAULT_SHELL);
|
---|
| 856 | export(shell);
|
---|
| 857 |
|
---|
| 858 | homedir = lookup("HOME");
|
---|
| 859 | if (homedir->value == null)
|
---|
| 860 | setval(homedir, "/");
|
---|
| 861 | export(homedir);
|
---|
| 862 |
|
---|
| 863 | setval(lookup("$"), putn(getpid()));
|
---|
| 864 |
|
---|
| 865 | path = lookup("PATH");
|
---|
| 866 | if (path->value == null) {
|
---|
| 867 | if (geteuid() == 0)
|
---|
| 868 | setval(path, "/sbin:/bin:/usr/sbin:/usr/bin");
|
---|
| 869 | else
|
---|
| 870 | setval(path, "/bin:/usr/bin");
|
---|
| 871 | }
|
---|
| 872 | export(path);
|
---|
| 873 |
|
---|
| 874 | ifs = lookup("IFS");
|
---|
| 875 | if (ifs->value == null)
|
---|
| 876 | setval(ifs, " \t\n");
|
---|
| 877 |
|
---|
| 878 | #ifdef MSHDEBUG
|
---|
| 879 | mshdbg_var = lookup("MSHDEBUG");
|
---|
| 880 | if (mshdbg_var->value == null)
|
---|
| 881 | setval(mshdbg_var, "0");
|
---|
| 882 | #endif
|
---|
| 883 |
|
---|
| 884 | prompt = lookup("PS1");
|
---|
| 885 | #ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
|
---|
| 886 | if (prompt->value == null)
|
---|
| 887 | #endif
|
---|
| 888 | setval(prompt, DEFAULT_USER_PROMPT);
|
---|
| 889 | if (geteuid() == 0) {
|
---|
| 890 | setval(prompt, DEFAULT_ROOT_PROMPT);
|
---|
| 891 | prompt->status &= ~EXPORT;
|
---|
| 892 | }
|
---|
| 893 | cprompt = lookup("PS2");
|
---|
| 894 | #ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
|
---|
| 895 | if (cprompt->value == null)
|
---|
| 896 | #endif
|
---|
| 897 | setval(cprompt, "> ");
|
---|
| 898 |
|
---|
| 899 | iof = filechar;
|
---|
| 900 | cflag = 0;
|
---|
| 901 | name = *argv++;
|
---|
| 902 | if (--argc >= 1) {
|
---|
| 903 | if (argv[0][0] == '-' && argv[0][1] != '\0') {
|
---|
| 904 | for (s = argv[0] + 1; *s; s++)
|
---|
| 905 | switch (*s) {
|
---|
| 906 | case 'c':
|
---|
| 907 | prompt->status &= ~EXPORT;
|
---|
| 908 | cprompt->status &= ~EXPORT;
|
---|
| 909 | setval(prompt, "");
|
---|
| 910 | setval(cprompt, "");
|
---|
| 911 | cflag = 1;
|
---|
| 912 | if (--argc > 0)
|
---|
| 913 | PUSHIO(aword, *++argv, iof = nlchar);
|
---|
| 914 | break;
|
---|
| 915 |
|
---|
| 916 | case 'q':
|
---|
| 917 | qflag = SIG_DFL;
|
---|
| 918 | break;
|
---|
| 919 |
|
---|
| 920 | case 's':
|
---|
| 921 | /* standard input */
|
---|
| 922 | break;
|
---|
| 923 |
|
---|
| 924 | case 't':
|
---|
| 925 | prompt->status &= ~EXPORT;
|
---|
| 926 | setval(prompt, "");
|
---|
| 927 | iof = linechar;
|
---|
| 928 | break;
|
---|
| 929 |
|
---|
| 930 | case 'i':
|
---|
| 931 | interactive++;
|
---|
| 932 | default:
|
---|
| 933 | if (*s >= 'a' && *s <= 'z')
|
---|
| 934 | flag[(int) *s]++;
|
---|
| 935 | }
|
---|
| 936 | } else {
|
---|
| 937 | argv--;
|
---|
| 938 | argc++;
|
---|
| 939 | }
|
---|
| 940 |
|
---|
| 941 | if (iof == filechar && --argc > 0) {
|
---|
| 942 | setval(prompt, "");
|
---|
| 943 | setval(cprompt, "");
|
---|
| 944 | prompt->status &= ~EXPORT;
|
---|
| 945 | cprompt->status &= ~EXPORT;
|
---|
| 946 |
|
---|
| 947 | /* Shell is non-interactive, activate printf-based debug */
|
---|
| 948 | #ifdef MSHDEBUG
|
---|
| 949 | mshdbg = (int) (((char) (mshdbg_var->value[0])) - '0');
|
---|
| 950 | if (mshdbg < 0)
|
---|
| 951 | mshdbg = 0;
|
---|
| 952 | #endif
|
---|
| 953 | DBGPRINTF(("MSH_MAIN: calling newfile()\n"));
|
---|
| 954 |
|
---|
| 955 | if (newfile(name = *++argv))
|
---|
| 956 | exit(1); /* Exit on error */
|
---|
| 957 | }
|
---|
| 958 | }
|
---|
| 959 |
|
---|
| 960 | setdash();
|
---|
| 961 |
|
---|
| 962 | /* This won't be true if PUSHIO has been called, say from newfile() above */
|
---|
| 963 | if (e.iop < iostack) {
|
---|
| 964 | PUSHIO(afile, 0, iof);
|
---|
| 965 | if (isatty(0) && isatty(1) && !cflag) {
|
---|
| 966 | interactive++;
|
---|
| 967 | #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
|
---|
| 968 | #ifdef MSHDEBUG
|
---|
| 969 | printf("\n\n%s Built-in shell (msh with debug)\n", BB_BANNER);
|
---|
| 970 | #else
|
---|
| 971 | printf("\n\n%s Built-in shell (msh)\n", BB_BANNER);
|
---|
| 972 | #endif
|
---|
| 973 | printf("Enter 'help' for a list of built-in commands.\n\n");
|
---|
| 974 | #endif
|
---|
| 975 | }
|
---|
| 976 | }
|
---|
| 977 |
|
---|
| 978 | signal(SIGQUIT, qflag);
|
---|
| 979 | if (name && name[0] == '-') {
|
---|
| 980 | interactive++;
|
---|
| 981 | if ((f = open(".profile", 0)) >= 0)
|
---|
| 982 | next(remap(f));
|
---|
| 983 | if ((f = open("/etc/profile", 0)) >= 0)
|
---|
| 984 | next(remap(f));
|
---|
| 985 | }
|
---|
| 986 | if (interactive)
|
---|
| 987 | signal(SIGTERM, sig);
|
---|
| 988 |
|
---|
| 989 | if (signal(SIGINT, SIG_IGN) != SIG_IGN)
|
---|
| 990 | signal(SIGINT, onintr);
|
---|
| 991 | dolv = argv;
|
---|
| 992 | dolc = argc;
|
---|
| 993 | dolv[0] = name;
|
---|
| 994 | if (dolc > 1) {
|
---|
| 995 | for (ap = ++argv; --argc > 0;) {
|
---|
| 996 | if (assign(*ap = *argv++, !COPYV)) {
|
---|
| 997 | dolc--; /* keyword */
|
---|
| 998 | } else {
|
---|
| 999 | ap++;
|
---|
| 1000 | }
|
---|
| 1001 | }
|
---|
| 1002 | }
|
---|
| 1003 | setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc));
|
---|
| 1004 |
|
---|
| 1005 | DBGPRINTF(("MSH_MAIN: begin FOR loop, interactive %d, e.iop %p, iostack %p\n", interactive, e.iop, iostack));
|
---|
| 1006 |
|
---|
| 1007 | for (;;) {
|
---|
| 1008 | if (interactive && e.iop <= iostack) {
|
---|
| 1009 | #ifdef CONFIG_FEATURE_COMMAND_EDITING
|
---|
| 1010 | current_prompt = prompt->value;
|
---|
| 1011 | #else
|
---|
| 1012 | prs(prompt->value);
|
---|
| 1013 | #endif
|
---|
| 1014 | }
|
---|
| 1015 | onecommand();
|
---|
| 1016 | /* Ensure that getenv("PATH") stays current */
|
---|
| 1017 | setenv("PATH", path->value, 1);
|
---|
| 1018 | }
|
---|
| 1019 |
|
---|
| 1020 | DBGPRINTF(("MSH_MAIN: returning.\n"));
|
---|
| 1021 | }
|
---|
| 1022 |
|
---|
| 1023 | static void setdash(void)
|
---|
| 1024 | {
|
---|
| 1025 | REGISTER char *cp;
|
---|
| 1026 | REGISTER int c;
|
---|
| 1027 | char m['z' - 'a' + 1];
|
---|
| 1028 |
|
---|
| 1029 | cp = m;
|
---|
| 1030 | for (c = 'a'; c <= 'z'; c++)
|
---|
| 1031 | if (flag[(int) c])
|
---|
| 1032 | *cp++ = c;
|
---|
| 1033 | *cp = 0;
|
---|
| 1034 | setval(lookup("-"), m);
|
---|
| 1035 | }
|
---|
| 1036 |
|
---|
| 1037 | static int newfile(REGISTER char *s)
|
---|
| 1038 | {
|
---|
| 1039 | REGISTER int f;
|
---|
| 1040 |
|
---|
| 1041 | DBGPRINTF7(("NEWFILE: opening %s\n", s));
|
---|
| 1042 |
|
---|
| 1043 | if (strcmp(s, "-") != 0) {
|
---|
| 1044 | DBGPRINTF(("NEWFILE: s is %s\n", s));
|
---|
| 1045 | f = open(s, 0);
|
---|
| 1046 | if (f < 0) {
|
---|
| 1047 | prs(s);
|
---|
| 1048 | err(": cannot open");
|
---|
| 1049 | return (1);
|
---|
| 1050 | }
|
---|
| 1051 | } else
|
---|
| 1052 | f = 0;
|
---|
| 1053 |
|
---|
| 1054 | next(remap(f));
|
---|
| 1055 | return (0);
|
---|
| 1056 | }
|
---|
| 1057 |
|
---|
| 1058 |
|
---|
| 1059 | struct op *scantree(struct op *head)
|
---|
| 1060 | {
|
---|
| 1061 | struct op *dotnode;
|
---|
| 1062 |
|
---|
| 1063 | if (head == NULL)
|
---|
| 1064 | return (NULL);
|
---|
| 1065 |
|
---|
| 1066 | if (head->left != NULL) {
|
---|
| 1067 | dotnode = scantree(head->left);
|
---|
| 1068 | if (dotnode)
|
---|
| 1069 | return (dotnode);
|
---|
| 1070 | }
|
---|
| 1071 |
|
---|
| 1072 | if (head->right != NULL) {
|
---|
| 1073 | dotnode = scantree(head->right);
|
---|
| 1074 | if (dotnode)
|
---|
| 1075 | return (dotnode);
|
---|
| 1076 | }
|
---|
| 1077 |
|
---|
| 1078 | if (head->words == NULL)
|
---|
| 1079 | return (NULL);
|
---|
| 1080 |
|
---|
| 1081 | DBGPRINTF5(("SCANTREE: checking node %p\n", head));
|
---|
| 1082 |
|
---|
| 1083 | if ((head->type != TDOT) && (strcmp(".", head->words[0]) == 0)) {
|
---|
| 1084 | DBGPRINTF5(("SCANTREE: dot found in node %p\n", head));
|
---|
| 1085 | return (head);
|
---|
| 1086 | }
|
---|
| 1087 |
|
---|
| 1088 | return (NULL);
|
---|
| 1089 | }
|
---|
| 1090 |
|
---|
| 1091 |
|
---|
| 1092 | static void onecommand(void)
|
---|
| 1093 | {
|
---|
| 1094 | REGISTER int i;
|
---|
| 1095 | jmp_buf m1;
|
---|
| 1096 |
|
---|
| 1097 | DBGPRINTF(("ONECOMMAND: enter, outtree=%p\n", outtree));
|
---|
| 1098 |
|
---|
| 1099 | while (e.oenv)
|
---|
| 1100 | quitenv();
|
---|
| 1101 |
|
---|
| 1102 | areanum = 1;
|
---|
| 1103 | freehere(areanum);
|
---|
| 1104 | freearea(areanum);
|
---|
| 1105 | garbage();
|
---|
| 1106 | wdlist = 0;
|
---|
| 1107 | iolist = 0;
|
---|
| 1108 | e.errpt = 0;
|
---|
| 1109 | e.linep = line;
|
---|
| 1110 | yynerrs = 0;
|
---|
| 1111 | multiline = 0;
|
---|
| 1112 | inparse = 1;
|
---|
| 1113 | intr = 0;
|
---|
| 1114 | execflg = 0;
|
---|
| 1115 |
|
---|
| 1116 | setjmp(failpt = m1); /* Bruce Evans' fix */
|
---|
| 1117 | if (setjmp(failpt = m1) || yyparse() || intr) {
|
---|
| 1118 |
|
---|
| 1119 | DBGPRINTF(("ONECOMMAND: this is not good.\n"));
|
---|
| 1120 |
|
---|
| 1121 | while (e.oenv)
|
---|
| 1122 | quitenv();
|
---|
| 1123 | scraphere();
|
---|
| 1124 | if (!interactive && intr)
|
---|
| 1125 | leave();
|
---|
| 1126 | inparse = 0;
|
---|
| 1127 | intr = 0;
|
---|
| 1128 | return;
|
---|
| 1129 | }
|
---|
| 1130 |
|
---|
| 1131 | inparse = 0;
|
---|
| 1132 | brklist = 0;
|
---|
| 1133 | intr = 0;
|
---|
| 1134 | execflg = 0;
|
---|
| 1135 |
|
---|
| 1136 | if (!flag['n']) {
|
---|
| 1137 | DBGPRINTF(("ONECOMMAND: calling execute, t=outtree=%p\n",
|
---|
| 1138 | outtree));
|
---|
| 1139 | execute(outtree, NOPIPE, NOPIPE, 0);
|
---|
| 1140 | }
|
---|
| 1141 |
|
---|
| 1142 | if (!interactive && intr) {
|
---|
| 1143 | execflg = 0;
|
---|
| 1144 | leave();
|
---|
| 1145 | }
|
---|
| 1146 |
|
---|
| 1147 | if ((i = trapset) != 0) {
|
---|
| 1148 | trapset = 0;
|
---|
| 1149 | runtrap(i);
|
---|
| 1150 | }
|
---|
| 1151 | }
|
---|
| 1152 |
|
---|
| 1153 | static void fail(void)
|
---|
| 1154 | {
|
---|
| 1155 | longjmp(failpt, 1);
|
---|
| 1156 | /* NOTREACHED */
|
---|
| 1157 | }
|
---|
| 1158 |
|
---|
| 1159 | static void leave(void)
|
---|
| 1160 | {
|
---|
| 1161 | DBGPRINTF(("LEAVE: leave called!\n"));
|
---|
| 1162 |
|
---|
| 1163 | if (execflg)
|
---|
| 1164 | fail();
|
---|
| 1165 | scraphere();
|
---|
| 1166 | freehere(1);
|
---|
| 1167 | runtrap(0);
|
---|
| 1168 | _exit(exstat);
|
---|
| 1169 | /* NOTREACHED */
|
---|
| 1170 | }
|
---|
| 1171 |
|
---|
| 1172 | static void warn(REGISTER char *s)
|
---|
| 1173 | {
|
---|
| 1174 | if (*s) {
|
---|
| 1175 | prs(s);
|
---|
| 1176 | exstat = -1;
|
---|
| 1177 | }
|
---|
| 1178 | prs("\n");
|
---|
| 1179 | if (flag['e'])
|
---|
| 1180 | leave();
|
---|
| 1181 | }
|
---|
| 1182 |
|
---|
| 1183 | static void err(char *s)
|
---|
| 1184 | {
|
---|
| 1185 | warn(s);
|
---|
| 1186 | if (flag['n'])
|
---|
| 1187 | return;
|
---|
| 1188 | if (!interactive)
|
---|
| 1189 | leave();
|
---|
| 1190 | if (e.errpt)
|
---|
| 1191 | longjmp(e.errpt, 1);
|
---|
| 1192 | closeall();
|
---|
| 1193 | e.iop = e.iobase = iostack;
|
---|
| 1194 | }
|
---|
| 1195 |
|
---|
| 1196 | static int newenv(int f)
|
---|
| 1197 | {
|
---|
| 1198 | REGISTER struct env *ep;
|
---|
| 1199 |
|
---|
| 1200 | DBGPRINTF(("NEWENV: f=%d (indicates quitenv and return)\n", f));
|
---|
| 1201 |
|
---|
| 1202 | if (f) {
|
---|
| 1203 | quitenv();
|
---|
| 1204 | return (1);
|
---|
| 1205 | }
|
---|
| 1206 |
|
---|
| 1207 | ep = (struct env *) space(sizeof(*ep));
|
---|
| 1208 | if (ep == NULL) {
|
---|
| 1209 | while (e.oenv)
|
---|
| 1210 | quitenv();
|
---|
| 1211 | fail();
|
---|
| 1212 | }
|
---|
| 1213 | *ep = e;
|
---|
| 1214 | e.oenv = ep;
|
---|
| 1215 | e.errpt = errpt;
|
---|
| 1216 |
|
---|
| 1217 | return (0);
|
---|
| 1218 | }
|
---|
| 1219 |
|
---|
| 1220 | static void quitenv(void)
|
---|
| 1221 | {
|
---|
| 1222 | REGISTER struct env *ep;
|
---|
| 1223 | REGISTER int fd;
|
---|
| 1224 |
|
---|
| 1225 | DBGPRINTF(("QUITENV: e.oenv=%p\n", e.oenv));
|
---|
| 1226 |
|
---|
| 1227 | if ((ep = e.oenv) != NULL) {
|
---|
| 1228 | fd = e.iofd;
|
---|
| 1229 | e = *ep;
|
---|
| 1230 | /* should close `'d files */
|
---|
| 1231 | DELETE(ep);
|
---|
| 1232 | while (--fd >= e.iofd)
|
---|
| 1233 | close(fd);
|
---|
| 1234 | }
|
---|
| 1235 | }
|
---|
| 1236 |
|
---|
| 1237 | /*
|
---|
| 1238 | * Is any character from s1 in s2?
|
---|
| 1239 | */
|
---|
| 1240 | static int anys(REGISTER char *s1, REGISTER char *s2)
|
---|
| 1241 | {
|
---|
| 1242 | while (*s1)
|
---|
| 1243 | if (any(*s1++, s2))
|
---|
| 1244 | return (1);
|
---|
| 1245 | return (0);
|
---|
| 1246 | }
|
---|
| 1247 |
|
---|
| 1248 | /*
|
---|
| 1249 | * Is character c in s?
|
---|
| 1250 | */
|
---|
| 1251 | static int any(REGISTER int c, REGISTER char *s)
|
---|
| 1252 | {
|
---|
| 1253 | while (*s)
|
---|
| 1254 | if (*s++ == c)
|
---|
| 1255 | return (1);
|
---|
| 1256 | return (0);
|
---|
| 1257 | }
|
---|
| 1258 |
|
---|
| 1259 | static char *putn(REGISTER int n)
|
---|
| 1260 | {
|
---|
| 1261 | return (itoa(n));
|
---|
| 1262 | }
|
---|
| 1263 |
|
---|
| 1264 | static char *itoa(REGISTER int n)
|
---|
| 1265 | {
|
---|
| 1266 | static char s[20];
|
---|
| 1267 |
|
---|
| 1268 | snprintf(s, sizeof(s), "%u", n);
|
---|
| 1269 | return (s);
|
---|
| 1270 | }
|
---|
| 1271 |
|
---|
| 1272 |
|
---|
| 1273 | static void next(int f)
|
---|
| 1274 | {
|
---|
| 1275 | PUSHIO(afile, f, filechar);
|
---|
| 1276 | }
|
---|
| 1277 |
|
---|
| 1278 | static void onintr(int s) /* ANSI C requires a parameter */
|
---|
| 1279 | {
|
---|
| 1280 | signal(SIGINT, onintr);
|
---|
| 1281 | intr = 1;
|
---|
| 1282 | if (interactive) {
|
---|
| 1283 | if (inparse) {
|
---|
| 1284 | prs("\n");
|
---|
| 1285 | fail();
|
---|
| 1286 | }
|
---|
| 1287 | } else if (heedint) {
|
---|
| 1288 | execflg = 0;
|
---|
| 1289 | leave();
|
---|
| 1290 | }
|
---|
| 1291 | }
|
---|
| 1292 |
|
---|
| 1293 | static char *space(int n)
|
---|
| 1294 | {
|
---|
| 1295 | REGISTER char *cp;
|
---|
| 1296 |
|
---|
| 1297 | if ((cp = getcell(n)) == 0)
|
---|
| 1298 | err("out of string space");
|
---|
| 1299 | return (cp);
|
---|
| 1300 | }
|
---|
| 1301 |
|
---|
| 1302 | static char *strsave(REGISTER char *s, int a)
|
---|
| 1303 | {
|
---|
| 1304 | REGISTER char *cp, *xp;
|
---|
| 1305 |
|
---|
| 1306 | if ((cp = space(strlen(s) + 1)) != NULL) {
|
---|
| 1307 | setarea((char *) cp, a);
|
---|
| 1308 | for (xp = cp; (*xp++ = *s++) != '\0';);
|
---|
| 1309 | return (cp);
|
---|
| 1310 | }
|
---|
| 1311 | return ("");
|
---|
| 1312 | }
|
---|
| 1313 |
|
---|
| 1314 | /*
|
---|
| 1315 | * trap handling
|
---|
| 1316 | */
|
---|
| 1317 | static void sig(REGISTER int i)
|
---|
| 1318 | {
|
---|
| 1319 | trapset = i;
|
---|
| 1320 | signal(i, sig);
|
---|
| 1321 | }
|
---|
| 1322 |
|
---|
| 1323 | static void runtrap(int i)
|
---|
| 1324 | {
|
---|
| 1325 | char *trapstr;
|
---|
| 1326 |
|
---|
| 1327 | if ((trapstr = trap[i]) == NULL)
|
---|
| 1328 | return;
|
---|
| 1329 |
|
---|
| 1330 | if (i == 0)
|
---|
| 1331 | trap[i] = 0;
|
---|
| 1332 |
|
---|
| 1333 | RUN(aword, trapstr, nlchar);
|
---|
| 1334 | }
|
---|
| 1335 |
|
---|
| 1336 | /* -------- var.c -------- */
|
---|
| 1337 |
|
---|
| 1338 | /*
|
---|
| 1339 | * Find the given name in the dictionary
|
---|
| 1340 | * and return its value. If the name was
|
---|
| 1341 | * not previously there, enter it now and
|
---|
| 1342 | * return a null value.
|
---|
| 1343 | */
|
---|
| 1344 | static struct var *lookup(REGISTER char *n)
|
---|
| 1345 | {
|
---|
| 1346 | REGISTER struct var *vp;
|
---|
| 1347 | REGISTER char *cp;
|
---|
| 1348 | REGISTER int c;
|
---|
| 1349 | static struct var dummy;
|
---|
| 1350 |
|
---|
| 1351 | if (isdigit(*n)) {
|
---|
| 1352 | dummy.name = n;
|
---|
| 1353 | for (c = 0; isdigit(*n) && c < 1000; n++)
|
---|
| 1354 | c = c * 10 + *n - '0';
|
---|
| 1355 | dummy.status = RONLY;
|
---|
| 1356 | dummy.value = c <= dolc ? dolv[c] : null;
|
---|
| 1357 | return (&dummy);
|
---|
| 1358 | }
|
---|
| 1359 | for (vp = vlist; vp; vp = vp->next)
|
---|
| 1360 | if (eqname(vp->name, n))
|
---|
| 1361 | return (vp);
|
---|
| 1362 | cp = findeq(n);
|
---|
| 1363 | vp = (struct var *) space(sizeof(*vp));
|
---|
| 1364 | if (vp == 0 || (vp->name = space((int) (cp - n) + 2)) == 0) {
|
---|
| 1365 | dummy.name = dummy.value = "";
|
---|
| 1366 | return (&dummy);
|
---|
| 1367 | }
|
---|
| 1368 | for (cp = vp->name; (*cp = *n++) && *cp != '='; cp++);
|
---|
| 1369 | if (*cp == 0)
|
---|
| 1370 | *cp = '=';
|
---|
| 1371 | *++cp = 0;
|
---|
| 1372 | setarea((char *) vp, 0);
|
---|
| 1373 | setarea((char *) vp->name, 0);
|
---|
| 1374 | vp->value = null;
|
---|
| 1375 | vp->next = vlist;
|
---|
| 1376 | vp->status = GETCELL;
|
---|
| 1377 | vlist = vp;
|
---|
| 1378 | return (vp);
|
---|
| 1379 | }
|
---|
| 1380 |
|
---|
| 1381 | /*
|
---|
| 1382 | * give variable at `vp' the value `val'.
|
---|
| 1383 | */
|
---|
| 1384 | static void setval(struct var *vp, char *val)
|
---|
| 1385 | {
|
---|
| 1386 | nameval(vp, val, (char *) NULL);
|
---|
| 1387 | }
|
---|
| 1388 |
|
---|
| 1389 | /*
|
---|
| 1390 | * if name is not NULL, it must be
|
---|
| 1391 | * a prefix of the space `val',
|
---|
| 1392 | * and end with `='.
|
---|
| 1393 | * this is all so that exporting
|
---|
| 1394 | * values is reasonably painless.
|
---|
| 1395 | */
|
---|
| 1396 | static void nameval(REGISTER struct var *vp, char *val, char *name)
|
---|
| 1397 | {
|
---|
| 1398 | REGISTER char *cp, *xp;
|
---|
| 1399 | char *nv;
|
---|
| 1400 | int fl;
|
---|
| 1401 |
|
---|
| 1402 | if (vp->status & RONLY) {
|
---|
| 1403 | for (xp = vp->name; *xp && *xp != '=';)
|
---|
| 1404 | putc(*xp++, stderr);
|
---|
| 1405 | err(" is read-only");
|
---|
| 1406 | return;
|
---|
| 1407 | }
|
---|
| 1408 | fl = 0;
|
---|
| 1409 | if (name == NULL) {
|
---|
| 1410 | xp = space(strlen(vp->name) + strlen(val) + 2);
|
---|
| 1411 | if (xp == 0)
|
---|
| 1412 | return;
|
---|
| 1413 | /* make string: name=value */
|
---|
| 1414 | setarea((char *) xp, 0);
|
---|
| 1415 | name = xp;
|
---|
| 1416 | for (cp = vp->name; (*xp = *cp++) && *xp != '='; xp++);
|
---|
| 1417 | if (*xp++ == 0)
|
---|
| 1418 | xp[-1] = '=';
|
---|
| 1419 | nv = xp;
|
---|
| 1420 | for (cp = val; (*xp++ = *cp++) != '\0';);
|
---|
| 1421 | val = nv;
|
---|
| 1422 | fl = GETCELL;
|
---|
| 1423 | }
|
---|
| 1424 | if (vp->status & GETCELL)
|
---|
| 1425 | freecell(vp->name); /* form new string `name=value' */
|
---|
| 1426 | vp->name = name;
|
---|
| 1427 | vp->value = val;
|
---|
| 1428 | vp->status |= fl;
|
---|
| 1429 | }
|
---|
| 1430 |
|
---|
| 1431 | static void export(struct var *vp)
|
---|
| 1432 | {
|
---|
| 1433 | vp->status |= EXPORT;
|
---|
| 1434 | }
|
---|
| 1435 |
|
---|
| 1436 | static void ronly(struct var *vp)
|
---|
| 1437 | {
|
---|
| 1438 | if (isalpha(vp->name[0]) || vp->name[0] == '_') /* not an internal symbol */
|
---|
| 1439 | vp->status |= RONLY;
|
---|
| 1440 | }
|
---|
| 1441 |
|
---|
| 1442 | static int isassign(REGISTER char *s)
|
---|
| 1443 | {
|
---|
| 1444 | DBGPRINTF7(("ISASSIGN: enter, s=%s\n", s));
|
---|
| 1445 |
|
---|
| 1446 | if (!isalpha((int) *s) && *s != '_')
|
---|
| 1447 | return (0);
|
---|
| 1448 | for (; *s != '='; s++)
|
---|
| 1449 | if (*s == 0 || (!isalnum(*s) && *s != '_'))
|
---|
| 1450 | return (0);
|
---|
| 1451 |
|
---|
| 1452 | return (1);
|
---|
| 1453 | }
|
---|
| 1454 |
|
---|
| 1455 | static int assign(REGISTER char *s, int cf)
|
---|
| 1456 | {
|
---|
| 1457 | REGISTER char *cp;
|
---|
| 1458 | struct var *vp;
|
---|
| 1459 |
|
---|
| 1460 | DBGPRINTF7(("ASSIGN: enter, s=%s, cf=%d\n", s, cf));
|
---|
| 1461 |
|
---|
| 1462 | if (!isalpha(*s) && *s != '_')
|
---|
| 1463 | return (0);
|
---|
| 1464 | for (cp = s; *cp != '='; cp++)
|
---|
| 1465 | if (*cp == 0 || (!isalnum(*cp) && *cp != '_'))
|
---|
| 1466 | return (0);
|
---|
| 1467 | vp = lookup(s);
|
---|
| 1468 | nameval(vp, ++cp, cf == COPYV ? (char *) NULL : s);
|
---|
| 1469 | if (cf != COPYV)
|
---|
| 1470 | vp->status &= ~GETCELL;
|
---|
| 1471 | return (1);
|
---|
| 1472 | }
|
---|
| 1473 |
|
---|
| 1474 | static int checkname(REGISTER char *cp)
|
---|
| 1475 | {
|
---|
| 1476 | DBGPRINTF7(("CHECKNAME: enter, cp=%s\n", cp));
|
---|
| 1477 |
|
---|
| 1478 | if (!isalpha(*cp++) && *(cp - 1) != '_')
|
---|
| 1479 | return (0);
|
---|
| 1480 | while (*cp)
|
---|
| 1481 | if (!isalnum(*cp++) && *(cp - 1) != '_')
|
---|
| 1482 | return (0);
|
---|
| 1483 | return (1);
|
---|
| 1484 | }
|
---|
| 1485 |
|
---|
| 1486 | static void putvlist(REGISTER int f, REGISTER int out)
|
---|
| 1487 | {
|
---|
| 1488 | REGISTER struct var *vp;
|
---|
| 1489 |
|
---|
| 1490 | for (vp = vlist; vp; vp = vp->next)
|
---|
| 1491 | if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) {
|
---|
| 1492 | if (vp->status & EXPORT)
|
---|
| 1493 | write(out, "export ", 7);
|
---|
| 1494 | if (vp->status & RONLY)
|
---|
| 1495 | write(out, "readonly ", 9);
|
---|
| 1496 | write(out, vp->name, (int) (findeq(vp->name) - vp->name));
|
---|
| 1497 | write(out, "\n", 1);
|
---|
| 1498 | }
|
---|
| 1499 | }
|
---|
| 1500 |
|
---|
| 1501 | static int eqname(REGISTER char *n1, REGISTER char *n2)
|
---|
| 1502 | {
|
---|
| 1503 | for (; *n1 != '=' && *n1 != 0; n1++)
|
---|
| 1504 | if (*n2++ != *n1)
|
---|
| 1505 | return (0);
|
---|
| 1506 | return (*n2 == 0 || *n2 == '=');
|
---|
| 1507 | }
|
---|
| 1508 |
|
---|
| 1509 | static char *findeq(REGISTER char *cp)
|
---|
| 1510 | {
|
---|
| 1511 | while (*cp != '\0' && *cp != '=')
|
---|
| 1512 | cp++;
|
---|
| 1513 | return (cp);
|
---|
| 1514 | }
|
---|
| 1515 |
|
---|
| 1516 | /* -------- gmatch.c -------- */
|
---|
| 1517 | /*
|
---|
| 1518 | * int gmatch(string, pattern)
|
---|
| 1519 | * char *string, *pattern;
|
---|
| 1520 | *
|
---|
| 1521 | * Match a pattern as in sh(1).
|
---|
| 1522 | */
|
---|
| 1523 |
|
---|
| 1524 | #define CMASK 0377
|
---|
| 1525 | #define QUOTE 0200
|
---|
| 1526 | #define QMASK (CMASK&~QUOTE)
|
---|
| 1527 | #define NOT '!' /* might use ^ */
|
---|
| 1528 |
|
---|
| 1529 | static int gmatch(REGISTER char *s, REGISTER char *p)
|
---|
| 1530 | {
|
---|
| 1531 | REGISTER int sc, pc;
|
---|
| 1532 |
|
---|
| 1533 | if (s == NULL || p == NULL)
|
---|
| 1534 | return (0);
|
---|
| 1535 | while ((pc = *p++ & CMASK) != '\0') {
|
---|
| 1536 | sc = *s++ & QMASK;
|
---|
| 1537 | switch (pc) {
|
---|
| 1538 | case '[':
|
---|
| 1539 | if ((p = cclass(p, sc)) == NULL)
|
---|
| 1540 | return (0);
|
---|
| 1541 | break;
|
---|
| 1542 |
|
---|
| 1543 | case '?':
|
---|
| 1544 | if (sc == 0)
|
---|
| 1545 | return (0);
|
---|
| 1546 | break;
|
---|
| 1547 |
|
---|
| 1548 | case '*':
|
---|
| 1549 | s--;
|
---|
| 1550 | do {
|
---|
| 1551 | if (*p == '\0' || gmatch(s, p))
|
---|
| 1552 | return (1);
|
---|
| 1553 | } while (*s++ != '\0');
|
---|
| 1554 | return (0);
|
---|
| 1555 |
|
---|
| 1556 | default:
|
---|
| 1557 | if (sc != (pc & ~QUOTE))
|
---|
| 1558 | return (0);
|
---|
| 1559 | }
|
---|
| 1560 | }
|
---|
| 1561 | return (*s == 0);
|
---|
| 1562 | }
|
---|
| 1563 |
|
---|
| 1564 | static char *cclass(REGISTER char *p, REGISTER int sub)
|
---|
| 1565 | {
|
---|
| 1566 | REGISTER int c, d, not, found;
|
---|
| 1567 |
|
---|
| 1568 | if ((not = *p == NOT) != 0)
|
---|
| 1569 | p++;
|
---|
| 1570 | found = not;
|
---|
| 1571 | do {
|
---|
| 1572 | if (*p == '\0')
|
---|
| 1573 | return ((char *) NULL);
|
---|
| 1574 | c = *p & CMASK;
|
---|
| 1575 | if (p[1] == '-' && p[2] != ']') {
|
---|
| 1576 | d = p[2] & CMASK;
|
---|
| 1577 | p++;
|
---|
| 1578 | } else
|
---|
| 1579 | d = c;
|
---|
| 1580 | if (c == sub || (c <= sub && sub <= d))
|
---|
| 1581 | found = !not;
|
---|
| 1582 | } while (*++p != ']');
|
---|
| 1583 | return (found ? p + 1 : (char *) NULL);
|
---|
| 1584 | }
|
---|
| 1585 |
|
---|
| 1586 |
|
---|
| 1587 | /* -------- area.c -------- */
|
---|
| 1588 |
|
---|
| 1589 | /*
|
---|
| 1590 | * All memory between (char *)areabot and (char *)(areatop+1) is
|
---|
| 1591 | * exclusively administered by the area management routines.
|
---|
| 1592 | * It is assumed that sbrk() and brk() manipulate the high end.
|
---|
| 1593 | */
|
---|
| 1594 |
|
---|
| 1595 | #define sbrk(X) ({ void * __q = (void *)-1; if (brkaddr + (int)(X) < brktop) { __q = brkaddr; brkaddr+=(int)(X); } __q;})
|
---|
| 1596 |
|
---|
| 1597 | static void initarea(void)
|
---|
| 1598 | {
|
---|
| 1599 | brkaddr = xmalloc(AREASIZE);
|
---|
| 1600 | brktop = brkaddr + AREASIZE;
|
---|
| 1601 |
|
---|
| 1602 | while ((long) sbrk(0) & ALIGN)
|
---|
| 1603 | sbrk(1);
|
---|
| 1604 | areabot = (struct region *) sbrk(REGSIZE);
|
---|
| 1605 |
|
---|
| 1606 | areabot->next = areabot;
|
---|
| 1607 | areabot->area = BUSY;
|
---|
| 1608 | areatop = areabot;
|
---|
| 1609 | areanxt = areabot;
|
---|
| 1610 | }
|
---|
| 1611 |
|
---|
| 1612 | char *getcell(unsigned nbytes)
|
---|
| 1613 | {
|
---|
| 1614 | REGISTER int nregio;
|
---|
| 1615 | REGISTER struct region *p, *q;
|
---|
| 1616 | REGISTER int i;
|
---|
| 1617 |
|
---|
| 1618 | if (nbytes == 0) {
|
---|
| 1619 | puts("getcell(0)");
|
---|
| 1620 | abort();
|
---|
| 1621 | }
|
---|
| 1622 | /* silly and defeats the algorithm */
|
---|
| 1623 | /*
|
---|
| 1624 | * round upwards and add administration area
|
---|
| 1625 | */
|
---|
| 1626 | nregio = (nbytes + (REGSIZE - 1)) / REGSIZE + 1;
|
---|
| 1627 | for (p = areanxt;;) {
|
---|
| 1628 | if (p->area > areanum) {
|
---|
| 1629 | /*
|
---|
| 1630 | * merge free cells
|
---|
| 1631 | */
|
---|
| 1632 | while ((q = p->next)->area > areanum && q != areanxt)
|
---|
| 1633 | p->next = q->next;
|
---|
| 1634 | /*
|
---|
| 1635 | * exit loop if cell big enough
|
---|
| 1636 | */
|
---|
| 1637 | if (q >= p + nregio)
|
---|
| 1638 | goto found;
|
---|
| 1639 | }
|
---|
| 1640 | p = p->next;
|
---|
| 1641 | if (p == areanxt)
|
---|
| 1642 | break;
|
---|
| 1643 | }
|
---|
| 1644 | i = nregio >= GROWBY ? nregio : GROWBY;
|
---|
| 1645 | p = (struct region *) sbrk(i * REGSIZE);
|
---|
| 1646 | if (p == (struct region *) -1)
|
---|
| 1647 | return ((char *) NULL);
|
---|
| 1648 | p--;
|
---|
| 1649 | if (p != areatop) {
|
---|
| 1650 | puts("not contig");
|
---|
| 1651 | abort(); /* allocated areas are contiguous */
|
---|
| 1652 | }
|
---|
| 1653 | q = p + i;
|
---|
| 1654 | p->next = q;
|
---|
| 1655 | p->area = FREE;
|
---|
| 1656 | q->next = areabot;
|
---|
| 1657 | q->area = BUSY;
|
---|
| 1658 | areatop = q;
|
---|
| 1659 | found:
|
---|
| 1660 | /*
|
---|
| 1661 | * we found a FREE area big enough, pointed to by 'p', and up to 'q'
|
---|
| 1662 | */
|
---|
| 1663 | areanxt = p + nregio;
|
---|
| 1664 | if (areanxt < q) {
|
---|
| 1665 | /*
|
---|
| 1666 | * split into requested area and rest
|
---|
| 1667 | */
|
---|
| 1668 | if (areanxt + 1 > q) {
|
---|
| 1669 | puts("OOM");
|
---|
| 1670 | abort(); /* insufficient space left for admin */
|
---|
| 1671 | }
|
---|
| 1672 | areanxt->next = q;
|
---|
| 1673 | areanxt->area = FREE;
|
---|
| 1674 | p->next = areanxt;
|
---|
| 1675 | }
|
---|
| 1676 | p->area = areanum;
|
---|
| 1677 | return ((char *) (p + 1));
|
---|
| 1678 | }
|
---|
| 1679 |
|
---|
| 1680 | static void freecell(char *cp)
|
---|
| 1681 | {
|
---|
| 1682 | REGISTER struct region *p;
|
---|
| 1683 |
|
---|
| 1684 | if ((p = (struct region *) cp) != NULL) {
|
---|
| 1685 | p--;
|
---|
| 1686 | if (p < areanxt)
|
---|
| 1687 | areanxt = p;
|
---|
| 1688 | p->area = FREE;
|
---|
| 1689 | }
|
---|
| 1690 | }
|
---|
| 1691 |
|
---|
| 1692 | static void freearea(REGISTER int a)
|
---|
| 1693 | {
|
---|
| 1694 | REGISTER struct region *p, *top;
|
---|
| 1695 |
|
---|
| 1696 | top = areatop;
|
---|
| 1697 | for (p = areabot; p != top; p = p->next)
|
---|
| 1698 | if (p->area >= a)
|
---|
| 1699 | p->area = FREE;
|
---|
| 1700 | }
|
---|
| 1701 |
|
---|
| 1702 | static void setarea(char *cp, int a)
|
---|
| 1703 | {
|
---|
| 1704 | REGISTER struct region *p;
|
---|
| 1705 |
|
---|
| 1706 | if ((p = (struct region *) cp) != NULL)
|
---|
| 1707 | (p - 1)->area = a;
|
---|
| 1708 | }
|
---|
| 1709 |
|
---|
| 1710 | int getarea(char *cp)
|
---|
| 1711 | {
|
---|
| 1712 | return ((struct region *) cp - 1)->area;
|
---|
| 1713 | }
|
---|
| 1714 |
|
---|
| 1715 | static void garbage(void)
|
---|
| 1716 | {
|
---|
| 1717 | REGISTER struct region *p, *q, *top;
|
---|
| 1718 |
|
---|
| 1719 | top = areatop;
|
---|
| 1720 | for (p = areabot; p != top; p = p->next) {
|
---|
| 1721 | if (p->area > areanum) {
|
---|
| 1722 | while ((q = p->next)->area > areanum)
|
---|
| 1723 | p->next = q->next;
|
---|
| 1724 | areanxt = p;
|
---|
| 1725 | }
|
---|
| 1726 | }
|
---|
| 1727 | #ifdef SHRINKBY
|
---|
| 1728 | if (areatop >= q + SHRINKBY && q->area > areanum) {
|
---|
| 1729 | brk((char *) (q + 1));
|
---|
| 1730 | q->next = areabot;
|
---|
| 1731 | q->area = BUSY;
|
---|
| 1732 | areatop = q;
|
---|
| 1733 | }
|
---|
| 1734 | #endif
|
---|
| 1735 | }
|
---|
| 1736 |
|
---|
| 1737 | /* -------- csyn.c -------- */
|
---|
| 1738 | /*
|
---|
| 1739 | * shell: syntax (C version)
|
---|
| 1740 | */
|
---|
| 1741 |
|
---|
| 1742 | int yyparse(void)
|
---|
| 1743 | {
|
---|
| 1744 | DBGPRINTF7(("YYPARSE: enter...\n"));
|
---|
| 1745 |
|
---|
| 1746 | startl = 1;
|
---|
| 1747 | peeksym = 0;
|
---|
| 1748 | yynerrs = 0;
|
---|
| 1749 | outtree = c_list();
|
---|
| 1750 | musthave('\n', 0);
|
---|
| 1751 | return (yynerrs != 0);
|
---|
| 1752 | }
|
---|
| 1753 |
|
---|
| 1754 | static struct op *pipeline(int cf)
|
---|
| 1755 | {
|
---|
| 1756 | REGISTER struct op *t, *p;
|
---|
| 1757 | REGISTER int c;
|
---|
| 1758 |
|
---|
| 1759 | DBGPRINTF7(("PIPELINE: enter, cf=%d\n", cf));
|
---|
| 1760 |
|
---|
| 1761 | t = command(cf);
|
---|
| 1762 |
|
---|
| 1763 | DBGPRINTF9(("PIPELINE: t=%p\n", t));
|
---|
| 1764 |
|
---|
| 1765 | if (t != NULL) {
|
---|
| 1766 | while ((c = yylex(0)) == '|') {
|
---|
| 1767 | if ((p = command(CONTIN)) == NULL) {
|
---|
| 1768 | DBGPRINTF8(("PIPELINE: error!\n"));
|
---|
| 1769 | SYNTAXERR;
|
---|
| 1770 | }
|
---|
| 1771 |
|
---|
| 1772 | if (t->type != TPAREN && t->type != TCOM) {
|
---|
| 1773 | /* shell statement */
|
---|
| 1774 | t = block(TPAREN, t, NOBLOCK, NOWORDS);
|
---|
| 1775 | }
|
---|
| 1776 |
|
---|
| 1777 | t = block(TPIPE, t, p, NOWORDS);
|
---|
| 1778 | }
|
---|
| 1779 | peeksym = c;
|
---|
| 1780 | }
|
---|
| 1781 |
|
---|
| 1782 | DBGPRINTF7(("PIPELINE: returning t=%p\n", t));
|
---|
| 1783 | return (t);
|
---|
| 1784 | }
|
---|
| 1785 |
|
---|
| 1786 | static struct op *andor(void)
|
---|
| 1787 | {
|
---|
| 1788 | REGISTER struct op *t, *p;
|
---|
| 1789 | REGISTER int c;
|
---|
| 1790 |
|
---|
| 1791 | DBGPRINTF7(("ANDOR: enter...\n"));
|
---|
| 1792 |
|
---|
| 1793 | t = pipeline(0);
|
---|
| 1794 |
|
---|
| 1795 | DBGPRINTF9(("ANDOR: t=%p\n", t));
|
---|
| 1796 |
|
---|
| 1797 | if (t != NULL) {
|
---|
| 1798 | while ((c = yylex(0)) == LOGAND || c == LOGOR) {
|
---|
| 1799 | if ((p = pipeline(CONTIN)) == NULL) {
|
---|
| 1800 | DBGPRINTF8(("ANDOR: error!\n"));
|
---|
| 1801 | SYNTAXERR;
|
---|
| 1802 | }
|
---|
| 1803 |
|
---|
| 1804 | t = block(c == LOGAND ? TAND : TOR, t, p, NOWORDS);
|
---|
| 1805 | } /* WHILE */
|
---|
| 1806 |
|
---|
| 1807 | peeksym = c;
|
---|
| 1808 | }
|
---|
| 1809 |
|
---|
| 1810 | DBGPRINTF7(("ANDOR: returning t=%p\n", t));
|
---|
| 1811 | return (t);
|
---|
| 1812 | }
|
---|
| 1813 |
|
---|
| 1814 | static struct op *c_list(void)
|
---|
| 1815 | {
|
---|
| 1816 | REGISTER struct op *t, *p;
|
---|
| 1817 | REGISTER int c;
|
---|
| 1818 |
|
---|
| 1819 | DBGPRINTF7(("C_LIST: enter...\n"));
|
---|
| 1820 |
|
---|
| 1821 | t = andor();
|
---|
| 1822 |
|
---|
| 1823 | if (t != NULL) {
|
---|
| 1824 | if ((peeksym = yylex(0)) == '&')
|
---|
| 1825 | t = block(TASYNC, t, NOBLOCK, NOWORDS);
|
---|
| 1826 |
|
---|
| 1827 | while ((c = yylex(0)) == ';' || c == '&'
|
---|
| 1828 | || (multiline && c == '\n')) {
|
---|
| 1829 |
|
---|
| 1830 | if ((p = andor()) == NULL)
|
---|
| 1831 | return (t);
|
---|
| 1832 |
|
---|
| 1833 | if ((peeksym = yylex(0)) == '&')
|
---|
| 1834 | p = block(TASYNC, p, NOBLOCK, NOWORDS);
|
---|
| 1835 |
|
---|
| 1836 | t = list(t, p);
|
---|
| 1837 | } /* WHILE */
|
---|
| 1838 |
|
---|
| 1839 | peeksym = c;
|
---|
| 1840 | }
|
---|
| 1841 | /* IF */
|
---|
| 1842 | DBGPRINTF7(("C_LIST: returning t=%p\n", t));
|
---|
| 1843 | return (t);
|
---|
| 1844 | }
|
---|
| 1845 |
|
---|
| 1846 | static int synio(int cf)
|
---|
| 1847 | {
|
---|
| 1848 | REGISTER struct ioword *iop;
|
---|
| 1849 | REGISTER int i;
|
---|
| 1850 | REGISTER int c;
|
---|
| 1851 |
|
---|
| 1852 | DBGPRINTF7(("SYNIO: enter, cf=%d\n", cf));
|
---|
| 1853 |
|
---|
| 1854 | if ((c = yylex(cf)) != '<' && c != '>') {
|
---|
| 1855 | peeksym = c;
|
---|
| 1856 | return (0);
|
---|
| 1857 | }
|
---|
| 1858 |
|
---|
| 1859 | i = yylval.i;
|
---|
| 1860 | musthave(WORD, 0);
|
---|
| 1861 | iop = io(iounit, i, yylval.cp);
|
---|
| 1862 | iounit = IODEFAULT;
|
---|
| 1863 |
|
---|
| 1864 | if (i & IOHERE)
|
---|
| 1865 | markhere(yylval.cp, iop);
|
---|
| 1866 |
|
---|
| 1867 | DBGPRINTF7(("SYNIO: returning 1\n"));
|
---|
| 1868 | return (1);
|
---|
| 1869 | }
|
---|
| 1870 |
|
---|
| 1871 | static void musthave(int c, int cf)
|
---|
| 1872 | {
|
---|
| 1873 | if ((peeksym = yylex(cf)) != c) {
|
---|
| 1874 | DBGPRINTF7(("MUSTHAVE: error!\n"));
|
---|
| 1875 | SYNTAXERR;
|
---|
| 1876 | }
|
---|
| 1877 |
|
---|
| 1878 | peeksym = 0;
|
---|
| 1879 | }
|
---|
| 1880 |
|
---|
| 1881 | static struct op *simple(void)
|
---|
| 1882 | {
|
---|
| 1883 | REGISTER struct op *t;
|
---|
| 1884 |
|
---|
| 1885 | t = NULL;
|
---|
| 1886 | for (;;) {
|
---|
| 1887 | switch (peeksym = yylex(0)) {
|
---|
| 1888 | case '<':
|
---|
| 1889 | case '>':
|
---|
| 1890 | (void) synio(0);
|
---|
| 1891 | break;
|
---|
| 1892 |
|
---|
| 1893 | case WORD:
|
---|
| 1894 | if (t == NULL) {
|
---|
| 1895 | t = newtp();
|
---|
| 1896 | t->type = TCOM;
|
---|
| 1897 | }
|
---|
| 1898 | peeksym = 0;
|
---|
| 1899 | word(yylval.cp);
|
---|
| 1900 | break;
|
---|
| 1901 |
|
---|
| 1902 | default:
|
---|
| 1903 | return (t);
|
---|
| 1904 | }
|
---|
| 1905 | }
|
---|
| 1906 | }
|
---|
| 1907 |
|
---|
| 1908 | static struct op *nested(int type, int mark)
|
---|
| 1909 | {
|
---|
| 1910 | REGISTER struct op *t;
|
---|
| 1911 |
|
---|
| 1912 | DBGPRINTF3(("NESTED: enter, type=%d, mark=%d\n", type, mark));
|
---|
| 1913 |
|
---|
| 1914 | multiline++;
|
---|
| 1915 | t = c_list();
|
---|
| 1916 | musthave(mark, 0);
|
---|
| 1917 | multiline--;
|
---|
| 1918 | return (block(type, t, NOBLOCK, NOWORDS));
|
---|
| 1919 | }
|
---|
| 1920 |
|
---|
| 1921 | static struct op *command(int cf)
|
---|
| 1922 | {
|
---|
| 1923 | REGISTER struct op *t;
|
---|
| 1924 | struct wdblock *iosave;
|
---|
| 1925 | REGISTER int c;
|
---|
| 1926 |
|
---|
| 1927 | DBGPRINTF(("COMMAND: enter, cf=%d\n", cf));
|
---|
| 1928 |
|
---|
| 1929 | iosave = iolist;
|
---|
| 1930 | iolist = NULL;
|
---|
| 1931 |
|
---|
| 1932 | if (multiline)
|
---|
| 1933 | cf |= CONTIN;
|
---|
| 1934 |
|
---|
| 1935 | while (synio(cf))
|
---|
| 1936 | cf = 0;
|
---|
| 1937 |
|
---|
| 1938 | c = yylex(cf);
|
---|
| 1939 |
|
---|
| 1940 | switch (c) {
|
---|
| 1941 | default:
|
---|
| 1942 | peeksym = c;
|
---|
| 1943 | if ((t = simple()) == NULL) {
|
---|
| 1944 | if (iolist == NULL)
|
---|
| 1945 | return ((struct op *) NULL);
|
---|
| 1946 | t = newtp();
|
---|
| 1947 | t->type = TCOM;
|
---|
| 1948 | }
|
---|
| 1949 | break;
|
---|
| 1950 |
|
---|
| 1951 | case '(':
|
---|
| 1952 | t = nested(TPAREN, ')');
|
---|
| 1953 | break;
|
---|
| 1954 |
|
---|
| 1955 | case '{':
|
---|
| 1956 | t = nested(TBRACE, '}');
|
---|
| 1957 | break;
|
---|
| 1958 |
|
---|
| 1959 | case FOR:
|
---|
| 1960 | t = newtp();
|
---|
| 1961 | t->type = TFOR;
|
---|
| 1962 | musthave(WORD, 0);
|
---|
| 1963 | startl = 1;
|
---|
| 1964 | t->str = yylval.cp;
|
---|
| 1965 | multiline++;
|
---|
| 1966 | t->words = wordlist();
|
---|
| 1967 | if ((c = yylex(0)) != '\n' && c != ';')
|
---|
| 1968 | peeksym = c;
|
---|
| 1969 | t->left = dogroup(0);
|
---|
| 1970 | multiline--;
|
---|
| 1971 | break;
|
---|
| 1972 |
|
---|
| 1973 | case WHILE:
|
---|
| 1974 | case UNTIL:
|
---|
| 1975 | multiline++;
|
---|
| 1976 | t = newtp();
|
---|
| 1977 | t->type = c == WHILE ? TWHILE : TUNTIL;
|
---|
| 1978 | t->left = c_list();
|
---|
| 1979 | t->right = dogroup(1);
|
---|
| 1980 | t->words = NULL;
|
---|
| 1981 | multiline--;
|
---|
| 1982 | break;
|
---|
| 1983 |
|
---|
| 1984 | case CASE:
|
---|
| 1985 | t = newtp();
|
---|
| 1986 | t->type = TCASE;
|
---|
| 1987 | musthave(WORD, 0);
|
---|
| 1988 | t->str = yylval.cp;
|
---|
| 1989 | startl++;
|
---|
| 1990 | multiline++;
|
---|
| 1991 | musthave(IN, CONTIN);
|
---|
| 1992 | startl++;
|
---|
| 1993 |
|
---|
| 1994 | t->left = caselist();
|
---|
| 1995 |
|
---|
| 1996 | musthave(ESAC, 0);
|
---|
| 1997 | multiline--;
|
---|
| 1998 | break;
|
---|
| 1999 |
|
---|
| 2000 | case IF:
|
---|
| 2001 | multiline++;
|
---|
| 2002 | t = newtp();
|
---|
| 2003 | t->type = TIF;
|
---|
| 2004 | t->left = c_list();
|
---|
| 2005 | t->right = thenpart();
|
---|
| 2006 | musthave(FI, 0);
|
---|
| 2007 | multiline--;
|
---|
| 2008 | break;
|
---|
| 2009 |
|
---|
| 2010 | case DOT:
|
---|
| 2011 | t = newtp();
|
---|
| 2012 | t->type = TDOT;
|
---|
| 2013 |
|
---|
| 2014 | musthave(WORD, 0); /* gets name of file */
|
---|
| 2015 | DBGPRINTF7(("COMMAND: DOT clause, yylval.cp is %s\n", yylval.cp));
|
---|
| 2016 |
|
---|
| 2017 | word(yylval.cp); /* add word to wdlist */
|
---|
| 2018 | word(NOWORD); /* terminate wdlist */
|
---|
| 2019 | t->words = copyw(); /* dup wdlist */
|
---|
| 2020 | break;
|
---|
| 2021 |
|
---|
| 2022 | }
|
---|
| 2023 |
|
---|
| 2024 | while (synio(0));
|
---|
| 2025 |
|
---|
| 2026 | t = namelist(t);
|
---|
| 2027 | iolist = iosave;
|
---|
| 2028 |
|
---|
| 2029 | DBGPRINTF(("COMMAND: returning %p\n", t));
|
---|
| 2030 |
|
---|
| 2031 | return (t);
|
---|
| 2032 | }
|
---|
| 2033 |
|
---|
| 2034 | static struct op *dowholefile(int type, int mark)
|
---|
| 2035 | {
|
---|
| 2036 | REGISTER struct op *t;
|
---|
| 2037 |
|
---|
| 2038 | DBGPRINTF(("DOWHOLEFILE: enter, type=%d, mark=%d\n", type, mark));
|
---|
| 2039 |
|
---|
| 2040 | multiline++;
|
---|
| 2041 | t = c_list();
|
---|
| 2042 | multiline--;
|
---|
| 2043 | t = block(type, t, NOBLOCK, NOWORDS);
|
---|
| 2044 | DBGPRINTF(("DOWHOLEFILE: return t=%p\n", t));
|
---|
| 2045 | return (t);
|
---|
| 2046 | }
|
---|
| 2047 |
|
---|
| 2048 | static struct op *dogroup(int onlydone)
|
---|
| 2049 | {
|
---|
| 2050 | REGISTER int c;
|
---|
| 2051 | REGISTER struct op *mylist;
|
---|
| 2052 |
|
---|
| 2053 | c = yylex(CONTIN);
|
---|
| 2054 | if (c == DONE && onlydone)
|
---|
| 2055 | return ((struct op *) NULL);
|
---|
| 2056 | if (c != DO)
|
---|
| 2057 | SYNTAXERR;
|
---|
| 2058 | mylist = c_list();
|
---|
| 2059 | musthave(DONE, 0);
|
---|
| 2060 | return (mylist);
|
---|
| 2061 | }
|
---|
| 2062 |
|
---|
| 2063 | static struct op *thenpart(void)
|
---|
| 2064 | {
|
---|
| 2065 | REGISTER int c;
|
---|
| 2066 | REGISTER struct op *t;
|
---|
| 2067 |
|
---|
| 2068 | if ((c = yylex(0)) != THEN) {
|
---|
| 2069 | peeksym = c;
|
---|
| 2070 | return ((struct op *) NULL);
|
---|
| 2071 | }
|
---|
| 2072 | t = newtp();
|
---|
| 2073 | t->type = 0;
|
---|
| 2074 | t->left = c_list();
|
---|
| 2075 | if (t->left == NULL)
|
---|
| 2076 | SYNTAXERR;
|
---|
| 2077 | t->right = elsepart();
|
---|
| 2078 | return (t);
|
---|
| 2079 | }
|
---|
| 2080 |
|
---|
| 2081 | static struct op *elsepart(void)
|
---|
| 2082 | {
|
---|
| 2083 | REGISTER int c;
|
---|
| 2084 | REGISTER struct op *t;
|
---|
| 2085 |
|
---|
| 2086 | switch (c = yylex(0)) {
|
---|
| 2087 | case ELSE:
|
---|
| 2088 | if ((t = c_list()) == NULL)
|
---|
| 2089 | SYNTAXERR;
|
---|
| 2090 | return (t);
|
---|
| 2091 |
|
---|
| 2092 | case ELIF:
|
---|
| 2093 | t = newtp();
|
---|
| 2094 | t->type = TELIF;
|
---|
| 2095 | t->left = c_list();
|
---|
| 2096 | t->right = thenpart();
|
---|
| 2097 | return (t);
|
---|
| 2098 |
|
---|
| 2099 | default:
|
---|
| 2100 | peeksym = c;
|
---|
| 2101 | return ((struct op *) NULL);
|
---|
| 2102 | }
|
---|
| 2103 | }
|
---|
| 2104 |
|
---|
| 2105 | static struct op *caselist(void)
|
---|
| 2106 | {
|
---|
| 2107 | REGISTER struct op *t;
|
---|
| 2108 |
|
---|
| 2109 | t = NULL;
|
---|
| 2110 | while ((peeksym = yylex(CONTIN)) != ESAC) {
|
---|
| 2111 | DBGPRINTF(("CASELIST, doing yylex, peeksym=%d\n", peeksym));
|
---|
| 2112 | t = list(t, casepart());
|
---|
| 2113 | }
|
---|
| 2114 |
|
---|
| 2115 | DBGPRINTF(("CASELIST, returning t=%p\n", t));
|
---|
| 2116 | return (t);
|
---|
| 2117 | }
|
---|
| 2118 |
|
---|
| 2119 | static struct op *casepart(void)
|
---|
| 2120 | {
|
---|
| 2121 | REGISTER struct op *t;
|
---|
| 2122 |
|
---|
| 2123 | DBGPRINTF7(("CASEPART: enter...\n"));
|
---|
| 2124 |
|
---|
| 2125 | t = newtp();
|
---|
| 2126 | t->type = TPAT;
|
---|
| 2127 | t->words = pattern();
|
---|
| 2128 | musthave(')', 0);
|
---|
| 2129 | t->left = c_list();
|
---|
| 2130 | if ((peeksym = yylex(CONTIN)) != ESAC)
|
---|
| 2131 | musthave(BREAK, CONTIN);
|
---|
| 2132 |
|
---|
| 2133 | DBGPRINTF7(("CASEPART: made newtp(TPAT, t=%p)\n", t));
|
---|
| 2134 |
|
---|
| 2135 | return (t);
|
---|
| 2136 | }
|
---|
| 2137 |
|
---|
| 2138 | static char **pattern(void)
|
---|
| 2139 | {
|
---|
| 2140 | REGISTER int c, cf;
|
---|
| 2141 |
|
---|
| 2142 | cf = CONTIN;
|
---|
| 2143 | do {
|
---|
| 2144 | musthave(WORD, cf);
|
---|
| 2145 | word(yylval.cp);
|
---|
| 2146 | cf = 0;
|
---|
| 2147 | } while ((c = yylex(0)) == '|');
|
---|
| 2148 | peeksym = c;
|
---|
| 2149 | word(NOWORD);
|
---|
| 2150 |
|
---|
| 2151 | return (copyw());
|
---|
| 2152 | }
|
---|
| 2153 |
|
---|
| 2154 | static char **wordlist(void)
|
---|
| 2155 | {
|
---|
| 2156 | REGISTER int c;
|
---|
| 2157 |
|
---|
| 2158 | if ((c = yylex(0)) != IN) {
|
---|
| 2159 | peeksym = c;
|
---|
| 2160 | return ((char **) NULL);
|
---|
| 2161 | }
|
---|
| 2162 | startl = 0;
|
---|
| 2163 | while ((c = yylex(0)) == WORD)
|
---|
| 2164 | word(yylval.cp);
|
---|
| 2165 | word(NOWORD);
|
---|
| 2166 | peeksym = c;
|
---|
| 2167 | return (copyw());
|
---|
| 2168 | }
|
---|
| 2169 |
|
---|
| 2170 | /*
|
---|
| 2171 | * supporting functions
|
---|
| 2172 | */
|
---|
| 2173 | static struct op *list(REGISTER struct op *t1, REGISTER struct op *t2)
|
---|
| 2174 | {
|
---|
| 2175 | DBGPRINTF7(("LIST: enter, t1=%p, t2=%p\n", t1, t2));
|
---|
| 2176 |
|
---|
| 2177 | if (t1 == NULL)
|
---|
| 2178 | return (t2);
|
---|
| 2179 | if (t2 == NULL)
|
---|
| 2180 | return (t1);
|
---|
| 2181 |
|
---|
| 2182 | return (block(TLIST, t1, t2, NOWORDS));
|
---|
| 2183 | }
|
---|
| 2184 |
|
---|
| 2185 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp)
|
---|
| 2186 | {
|
---|
| 2187 | REGISTER struct op *t;
|
---|
| 2188 |
|
---|
| 2189 | DBGPRINTF7(("BLOCK: enter, type=%d (%s)\n", type, T_CMD_NAMES[type]));
|
---|
| 2190 |
|
---|
| 2191 | t = newtp();
|
---|
| 2192 | t->type = type;
|
---|
| 2193 | t->left = t1;
|
---|
| 2194 | t->right = t2;
|
---|
| 2195 | t->words = wp;
|
---|
| 2196 |
|
---|
| 2197 | DBGPRINTF7(("BLOCK: inserted %p between %p and %p\n", t, t1,
|
---|
| 2198 | t2));
|
---|
| 2199 |
|
---|
| 2200 | return (t);
|
---|
| 2201 | }
|
---|
| 2202 |
|
---|
| 2203 | /* See if given string is a shell multiline (FOR, IF, etc) */
|
---|
| 2204 | static int rlookup(REGISTER char *n)
|
---|
| 2205 | {
|
---|
| 2206 | REGISTER const struct res *rp;
|
---|
| 2207 |
|
---|
| 2208 | DBGPRINTF7(("RLOOKUP: enter, n is %s\n", n));
|
---|
| 2209 |
|
---|
| 2210 | for (rp = restab; rp->r_name; rp++)
|
---|
| 2211 | if (strcmp(rp->r_name, n) == 0) {
|
---|
| 2212 | DBGPRINTF7(("RLOOKUP: match, returning %d\n", rp->r_val));
|
---|
| 2213 | return (rp->r_val); /* Return numeric code for shell multiline */
|
---|
| 2214 | }
|
---|
| 2215 |
|
---|
| 2216 | DBGPRINTF7(("RLOOKUP: NO match, returning 0\n"));
|
---|
| 2217 | return (0); /* Not a shell multiline */
|
---|
| 2218 | }
|
---|
| 2219 |
|
---|
| 2220 | static struct op *newtp(void)
|
---|
| 2221 | {
|
---|
| 2222 | REGISTER struct op *t;
|
---|
| 2223 |
|
---|
| 2224 | t = (struct op *) tree(sizeof(*t));
|
---|
| 2225 | t->type = 0;
|
---|
| 2226 | t->words = NULL;
|
---|
| 2227 | t->ioact = NULL;
|
---|
| 2228 | t->left = NULL;
|
---|
| 2229 | t->right = NULL;
|
---|
| 2230 | t->str = NULL;
|
---|
| 2231 |
|
---|
| 2232 | DBGPRINTF3(("NEWTP: allocated %p\n", t));
|
---|
| 2233 |
|
---|
| 2234 | return (t);
|
---|
| 2235 | }
|
---|
| 2236 |
|
---|
| 2237 | static struct op *namelist(REGISTER struct op *t)
|
---|
| 2238 | {
|
---|
| 2239 |
|
---|
| 2240 | DBGPRINTF7(("NAMELIST: enter, t=%p, type %s, iolist=%p\n", t,
|
---|
| 2241 | T_CMD_NAMES[t->type], iolist));
|
---|
| 2242 |
|
---|
| 2243 | if (iolist) {
|
---|
| 2244 | iolist = addword((char *) NULL, iolist);
|
---|
| 2245 | t->ioact = copyio();
|
---|
| 2246 | } else
|
---|
| 2247 | t->ioact = NULL;
|
---|
| 2248 |
|
---|
| 2249 | if (t->type != TCOM) {
|
---|
| 2250 | if (t->type != TPAREN && t->ioact != NULL) {
|
---|
| 2251 | t = block(TPAREN, t, NOBLOCK, NOWORDS);
|
---|
| 2252 | t->ioact = t->left->ioact;
|
---|
| 2253 | t->left->ioact = NULL;
|
---|
| 2254 | }
|
---|
| 2255 | return (t);
|
---|
| 2256 | }
|
---|
| 2257 |
|
---|
| 2258 | word(NOWORD);
|
---|
| 2259 | t->words = copyw();
|
---|
| 2260 |
|
---|
| 2261 |
|
---|
| 2262 | return (t);
|
---|
| 2263 | }
|
---|
| 2264 |
|
---|
| 2265 | static char **copyw(void)
|
---|
| 2266 | {
|
---|
| 2267 | REGISTER char **wd;
|
---|
| 2268 |
|
---|
| 2269 | wd = getwords(wdlist);
|
---|
| 2270 | wdlist = 0;
|
---|
| 2271 | return (wd);
|
---|
| 2272 | }
|
---|
| 2273 |
|
---|
| 2274 | static void word(char *cp)
|
---|
| 2275 | {
|
---|
| 2276 | wdlist = addword(cp, wdlist);
|
---|
| 2277 | }
|
---|
| 2278 |
|
---|
| 2279 | static struct ioword **copyio(void)
|
---|
| 2280 | {
|
---|
| 2281 | REGISTER struct ioword **iop;
|
---|
| 2282 |
|
---|
| 2283 | iop = (struct ioword **) getwords(iolist);
|
---|
| 2284 | iolist = 0;
|
---|
| 2285 | return (iop);
|
---|
| 2286 | }
|
---|
| 2287 |
|
---|
| 2288 | static struct ioword *io(int u, int f, char *cp)
|
---|
| 2289 | {
|
---|
| 2290 | REGISTER struct ioword *iop;
|
---|
| 2291 |
|
---|
| 2292 | iop = (struct ioword *) tree(sizeof(*iop));
|
---|
| 2293 | iop->io_unit = u;
|
---|
| 2294 | iop->io_flag = f;
|
---|
| 2295 | iop->io_name = cp;
|
---|
| 2296 | iolist = addword((char *) iop, iolist);
|
---|
| 2297 | return (iop);
|
---|
| 2298 | }
|
---|
| 2299 |
|
---|
| 2300 | static void zzerr(void)
|
---|
| 2301 | {
|
---|
| 2302 | yyerror("syntax error");
|
---|
| 2303 | }
|
---|
| 2304 |
|
---|
| 2305 | static void yyerror(char *s)
|
---|
| 2306 | {
|
---|
| 2307 | yynerrs++;
|
---|
| 2308 | if (interactive && e.iop <= iostack) {
|
---|
| 2309 | multiline = 0;
|
---|
| 2310 | while (eofc() == 0 && yylex(0) != '\n');
|
---|
| 2311 | }
|
---|
| 2312 | err(s);
|
---|
| 2313 | fail();
|
---|
| 2314 | }
|
---|
| 2315 |
|
---|
| 2316 | static int yylex(int cf)
|
---|
| 2317 | {
|
---|
| 2318 | REGISTER int c, c1;
|
---|
| 2319 | int atstart;
|
---|
| 2320 |
|
---|
| 2321 | if ((c = peeksym) > 0) {
|
---|
| 2322 | peeksym = 0;
|
---|
| 2323 | if (c == '\n')
|
---|
| 2324 | startl = 1;
|
---|
| 2325 | return (c);
|
---|
| 2326 | }
|
---|
| 2327 |
|
---|
| 2328 |
|
---|
| 2329 | nlseen = 0;
|
---|
| 2330 | atstart = startl;
|
---|
| 2331 | startl = 0;
|
---|
| 2332 | yylval.i = 0;
|
---|
| 2333 | e.linep = line;
|
---|
| 2334 |
|
---|
| 2335 | /* MALAMO */
|
---|
| 2336 | line[LINELIM - 1] = '\0';
|
---|
| 2337 |
|
---|
| 2338 | loop:
|
---|
| 2339 | while ((c = my_getc(0)) == ' ' || c == '\t') /* Skip whitespace */
|
---|
| 2340 | ;
|
---|
| 2341 |
|
---|
| 2342 | switch (c) {
|
---|
| 2343 | default:
|
---|
| 2344 | if (any(c, "0123456789")) {
|
---|
| 2345 | unget(c1 = my_getc(0));
|
---|
| 2346 | if (c1 == '<' || c1 == '>') {
|
---|
| 2347 | iounit = c - '0';
|
---|
| 2348 | goto loop;
|
---|
| 2349 | }
|
---|
| 2350 | *e.linep++ = c;
|
---|
| 2351 | c = c1;
|
---|
| 2352 | }
|
---|
| 2353 | break;
|
---|
| 2354 |
|
---|
| 2355 | case '#': /* Comment, skip to next newline or End-of-string */
|
---|
| 2356 | while ((c = my_getc(0)) != 0 && c != '\n');
|
---|
| 2357 | unget(c);
|
---|
| 2358 | goto loop;
|
---|
| 2359 |
|
---|
| 2360 | case 0:
|
---|
| 2361 | DBGPRINTF5(("YYLEX: return 0, c=%d\n", c));
|
---|
| 2362 | return (c);
|
---|
| 2363 |
|
---|
| 2364 | case '$':
|
---|
| 2365 | DBGPRINTF9(("YYLEX: found $\n"));
|
---|
| 2366 | *e.linep++ = c;
|
---|
| 2367 | if ((c = my_getc(0)) == '{') {
|
---|
| 2368 | if ((c = collect(c, '}')) != '\0')
|
---|
| 2369 | return (c);
|
---|
| 2370 | goto pack;
|
---|
| 2371 | }
|
---|
| 2372 | break;
|
---|
| 2373 |
|
---|
| 2374 | case '`':
|
---|
| 2375 | case '\'':
|
---|
| 2376 | case '"':
|
---|
| 2377 | if ((c = collect(c, c)) != '\0')
|
---|
| 2378 | return (c);
|
---|
| 2379 | goto pack;
|
---|
| 2380 |
|
---|
| 2381 | case '|':
|
---|
| 2382 | case '&':
|
---|
| 2383 | case ';':
|
---|
| 2384 | startl = 1;
|
---|
| 2385 | /* If more chars process them, else return NULL char */
|
---|
| 2386 | if ((c1 = dual(c)) != '\0')
|
---|
| 2387 | return (c1);
|
---|
| 2388 | else
|
---|
| 2389 | return (c);
|
---|
| 2390 |
|
---|
| 2391 | case '^':
|
---|
| 2392 | startl = 1;
|
---|
| 2393 | return ('|');
|
---|
| 2394 | case '>':
|
---|
| 2395 | case '<':
|
---|
| 2396 | diag(c);
|
---|
| 2397 | return (c);
|
---|
| 2398 |
|
---|
| 2399 | case '\n':
|
---|
| 2400 | nlseen++;
|
---|
| 2401 | gethere();
|
---|
| 2402 | startl = 1;
|
---|
| 2403 | if (multiline || cf & CONTIN) {
|
---|
| 2404 | if (interactive && e.iop <= iostack) {
|
---|
| 2405 | #ifdef CONFIG_FEATURE_COMMAND_EDITING
|
---|
| 2406 | current_prompt = cprompt->value;
|
---|
| 2407 | #else
|
---|
| 2408 | prs(cprompt->value);
|
---|
| 2409 | #endif
|
---|
| 2410 | }
|
---|
| 2411 | if (cf & CONTIN)
|
---|
| 2412 | goto loop;
|
---|
| 2413 | }
|
---|
| 2414 | return (c);
|
---|
| 2415 |
|
---|
| 2416 | case '(':
|
---|
| 2417 | case ')':
|
---|
| 2418 | startl = 1;
|
---|
| 2419 | return (c);
|
---|
| 2420 | }
|
---|
| 2421 |
|
---|
| 2422 | unget(c);
|
---|
| 2423 |
|
---|
| 2424 | pack:
|
---|
| 2425 | while ((c = my_getc(0)) != 0 && !any(c, "`$ '\"\t;&<>()|^\n")) {
|
---|
| 2426 | if (e.linep >= elinep)
|
---|
| 2427 | err("word too long");
|
---|
| 2428 | else
|
---|
| 2429 | *e.linep++ = c;
|
---|
| 2430 | };
|
---|
| 2431 |
|
---|
| 2432 | unget(c);
|
---|
| 2433 |
|
---|
| 2434 | if (any(c, "\"'`$"))
|
---|
| 2435 | goto loop;
|
---|
| 2436 |
|
---|
| 2437 | *e.linep++ = '\0';
|
---|
| 2438 |
|
---|
| 2439 | if (atstart && (c = rlookup(line)) != 0) {
|
---|
| 2440 | startl = 1;
|
---|
| 2441 | return (c);
|
---|
| 2442 | }
|
---|
| 2443 |
|
---|
| 2444 | yylval.cp = strsave(line, areanum);
|
---|
| 2445 | return (WORD);
|
---|
| 2446 | }
|
---|
| 2447 |
|
---|
| 2448 |
|
---|
| 2449 | static int collect(REGISTER int c, REGISTER int c1)
|
---|
| 2450 | {
|
---|
| 2451 | char s[2];
|
---|
| 2452 |
|
---|
| 2453 | DBGPRINTF8(("COLLECT: enter, c=%d, c1=%d\n", c, c1));
|
---|
| 2454 |
|
---|
| 2455 | *e.linep++ = c;
|
---|
| 2456 | while ((c = my_getc(c1)) != c1) {
|
---|
| 2457 | if (c == 0) {
|
---|
| 2458 | unget(c);
|
---|
| 2459 | s[0] = c1;
|
---|
| 2460 | s[1] = 0;
|
---|
| 2461 | prs("no closing ");
|
---|
| 2462 | yyerror(s);
|
---|
| 2463 | return (YYERRCODE);
|
---|
| 2464 | }
|
---|
| 2465 | if (interactive && c == '\n' && e.iop <= iostack) {
|
---|
| 2466 | #ifdef CONFIG_FEATURE_COMMAND_EDITING
|
---|
| 2467 | current_prompt = cprompt->value;
|
---|
| 2468 | #else
|
---|
| 2469 | prs(cprompt->value);
|
---|
| 2470 | #endif
|
---|
| 2471 | }
|
---|
| 2472 | *e.linep++ = c;
|
---|
| 2473 | }
|
---|
| 2474 |
|
---|
| 2475 | *e.linep++ = c;
|
---|
| 2476 |
|
---|
| 2477 | DBGPRINTF8(("COLLECT: return 0, line is %s\n", line));
|
---|
| 2478 |
|
---|
| 2479 | return (0);
|
---|
| 2480 | }
|
---|
| 2481 |
|
---|
| 2482 | /* "multiline commands" helper func */
|
---|
| 2483 | /* see if next 2 chars form a shell multiline */
|
---|
| 2484 | static int dual(REGISTER int c)
|
---|
| 2485 | {
|
---|
| 2486 | char s[3];
|
---|
| 2487 | REGISTER char *cp = s;
|
---|
| 2488 |
|
---|
| 2489 | DBGPRINTF8(("DUAL: enter, c=%d\n", c));
|
---|
| 2490 |
|
---|
| 2491 | *cp++ = c; /* c is the given "peek" char */
|
---|
| 2492 | *cp++ = my_getc(0); /* get next char of input */
|
---|
| 2493 | *cp = 0; /* add EOS marker */
|
---|
| 2494 |
|
---|
| 2495 | c = rlookup(s); /* see if 2 chars form a shell multiline */
|
---|
| 2496 | if (c == 0)
|
---|
| 2497 | unget(*--cp); /* String is not a shell multiline, put peek char back */
|
---|
| 2498 |
|
---|
| 2499 | return (c); /* String is multiline, return numeric multiline (restab) code */
|
---|
| 2500 | }
|
---|
| 2501 |
|
---|
| 2502 | static void diag(REGISTER int ec)
|
---|
| 2503 | {
|
---|
| 2504 | REGISTER int c;
|
---|
| 2505 |
|
---|
| 2506 | DBGPRINTF8(("DIAG: enter, ec=%d\n", ec));
|
---|
| 2507 |
|
---|
| 2508 | c = my_getc(0);
|
---|
| 2509 | if (c == '>' || c == '<') {
|
---|
| 2510 | if (c != ec)
|
---|
| 2511 | zzerr();
|
---|
| 2512 | yylval.i = ec == '>' ? IOWRITE | IOCAT : IOHERE;
|
---|
| 2513 | c = my_getc(0);
|
---|
| 2514 | } else
|
---|
| 2515 | yylval.i = ec == '>' ? IOWRITE : IOREAD;
|
---|
| 2516 | if (c != '&' || yylval.i == IOHERE)
|
---|
| 2517 | unget(c);
|
---|
| 2518 | else
|
---|
| 2519 | yylval.i |= IODUP;
|
---|
| 2520 | }
|
---|
| 2521 |
|
---|
| 2522 | static char *tree(unsigned size)
|
---|
| 2523 | {
|
---|
| 2524 | REGISTER char *t;
|
---|
| 2525 |
|
---|
| 2526 | if ((t = getcell(size)) == NULL) {
|
---|
| 2527 | DBGPRINTF2(("TREE: getcell(%d) failed!\n", size));
|
---|
| 2528 | prs("command line too complicated\n");
|
---|
| 2529 | fail();
|
---|
| 2530 | /* NOTREACHED */
|
---|
| 2531 | }
|
---|
| 2532 | return (t);
|
---|
| 2533 | }
|
---|
| 2534 |
|
---|
| 2535 | /* VARARGS1 */
|
---|
| 2536 | /* ARGSUSED */
|
---|
| 2537 |
|
---|
| 2538 | /* -------- exec.c -------- */
|
---|
| 2539 |
|
---|
| 2540 | /*
|
---|
| 2541 | * execute tree
|
---|
| 2542 | */
|
---|
| 2543 |
|
---|
| 2544 |
|
---|
| 2545 | static int execute(REGISTER struct op *t, int *pin, int *pout, int act)
|
---|
| 2546 | {
|
---|
| 2547 | REGISTER struct op *t1;
|
---|
| 2548 | volatile int i, rv, a;
|
---|
| 2549 | char *cp, **wp, **wp2;
|
---|
| 2550 | struct var *vp;
|
---|
| 2551 | struct op *outtree_save;
|
---|
| 2552 | struct brkcon bc;
|
---|
| 2553 |
|
---|
| 2554 | #if __GNUC__
|
---|
| 2555 | /* Avoid longjmp clobbering */
|
---|
| 2556 | (void) ℘
|
---|
| 2557 | #endif
|
---|
| 2558 |
|
---|
| 2559 | if (t == NULL) {
|
---|
| 2560 | DBGPRINTF4(("EXECUTE: enter, t==null, returning.\n"));
|
---|
| 2561 | return (0);
|
---|
| 2562 | }
|
---|
| 2563 |
|
---|
| 2564 | DBGPRINTF(("EXECUTE: t=%p, t->type=%d (%s), t->words is %s\n", t,
|
---|
| 2565 | t->type, T_CMD_NAMES[t->type],
|
---|
| 2566 | ((t->words == NULL) ? "NULL" : t->words[0])));
|
---|
| 2567 |
|
---|
| 2568 | rv = 0;
|
---|
| 2569 | a = areanum++;
|
---|
| 2570 | wp = (wp2 = t->words) != NULL
|
---|
| 2571 | ? eval(wp2, t->type == TCOM ? DOALL : DOALL & ~DOKEY)
|
---|
| 2572 | : NULL;
|
---|
| 2573 |
|
---|
| 2574 | /* Hard to know how many words there are, be careful of garbage pointer values */
|
---|
| 2575 | /* They are likely to cause "PCI bus fault" errors */
|
---|
| 2576 | #if 0
|
---|
| 2577 | DBGPRINTF(("EXECUTE: t->left=%p, t->right=%p, t->words[1] is %s\n",
|
---|
| 2578 | t->left, t->right,
|
---|
| 2579 | ((t->words[1] == NULL) ? "NULL" : t->words[1])));
|
---|
| 2580 | DBGPRINTF7(("EXECUTE: t->words[2] is %s, t->words[3] is %s\n",
|
---|
| 2581 | ((t->words[2] == NULL) ? "NULL" : t->words[2]),
|
---|
| 2582 | ((t->words[3] == NULL) ? "NULL" : t->words[3])));
|
---|
| 2583 | #endif
|
---|
| 2584 |
|
---|
| 2585 |
|
---|
| 2586 | switch (t->type) {
|
---|
| 2587 | case TDOT:
|
---|
| 2588 | DBGPRINTF3(("EXECUTE: TDOT\n"));
|
---|
| 2589 |
|
---|
| 2590 | outtree_save = outtree;
|
---|
| 2591 |
|
---|
| 2592 | newfile(evalstr(t->words[0], DOALL));
|
---|
| 2593 |
|
---|
| 2594 | t->left = dowholefile(TLIST, 0);
|
---|
| 2595 | t->right = NULL;
|
---|
| 2596 |
|
---|
| 2597 | outtree = outtree_save;
|
---|
| 2598 |
|
---|
| 2599 | if (t->left)
|
---|
| 2600 | rv = execute(t->left, pin, pout, 0);
|
---|
| 2601 | if (t->right)
|
---|
| 2602 | rv = execute(t->right, pin, pout, 0);
|
---|
| 2603 | break;
|
---|
| 2604 |
|
---|
| 2605 | case TPAREN:
|
---|
| 2606 | rv = execute(t->left, pin, pout, 0);
|
---|
| 2607 | break;
|
---|
| 2608 |
|
---|
| 2609 | case TCOM:
|
---|
| 2610 | {
|
---|
| 2611 | rv = forkexec(t, pin, pout, act, wp);
|
---|
| 2612 | }
|
---|
| 2613 | break;
|
---|
| 2614 |
|
---|
| 2615 | case TPIPE:
|
---|
| 2616 | {
|
---|
| 2617 | int pv[2];
|
---|
| 2618 |
|
---|
| 2619 | if ((rv = openpipe(pv)) < 0)
|
---|
| 2620 | break;
|
---|
| 2621 | pv[0] = remap(pv[0]);
|
---|
| 2622 | pv[1] = remap(pv[1]);
|
---|
| 2623 | (void) execute(t->left, pin, pv, 0);
|
---|
| 2624 | rv = execute(t->right, pv, pout, 0);
|
---|
| 2625 | }
|
---|
| 2626 | break;
|
---|
| 2627 |
|
---|
| 2628 | case TLIST:
|
---|
| 2629 | (void) execute(t->left, pin, pout, 0);
|
---|
| 2630 | rv = execute(t->right, pin, pout, 0);
|
---|
| 2631 | break;
|
---|
| 2632 |
|
---|
| 2633 | case TASYNC:
|
---|
| 2634 | {
|
---|
| 2635 | int hinteractive = interactive;
|
---|
| 2636 |
|
---|
| 2637 | DBGPRINTF7(("EXECUTE: TASYNC clause, calling vfork()...\n"));
|
---|
| 2638 |
|
---|
| 2639 | i = vfork();
|
---|
| 2640 | if (i != 0) {
|
---|
| 2641 | interactive = hinteractive;
|
---|
| 2642 | if (i != -1) {
|
---|
| 2643 | setval(lookup("!"), putn(i));
|
---|
| 2644 | if (pin != NULL)
|
---|
| 2645 | closepipe(pin);
|
---|
| 2646 | if (interactive) {
|
---|
| 2647 | prs(putn(i));
|
---|
| 2648 | prs("\n");
|
---|
| 2649 | }
|
---|
| 2650 | } else
|
---|
| 2651 | rv = -1;
|
---|
| 2652 | setstatus(rv);
|
---|
| 2653 | } else {
|
---|
| 2654 | signal(SIGINT, SIG_IGN);
|
---|
| 2655 | signal(SIGQUIT, SIG_IGN);
|
---|
| 2656 | if (interactive)
|
---|
| 2657 | signal(SIGTERM, SIG_DFL);
|
---|
| 2658 | interactive = 0;
|
---|
| 2659 | if (pin == NULL) {
|
---|
| 2660 | close(0);
|
---|
| 2661 | open(bb_dev_null, 0);
|
---|
| 2662 | }
|
---|
| 2663 | _exit(execute(t->left, pin, pout, FEXEC));
|
---|
| 2664 | }
|
---|
| 2665 | }
|
---|
| 2666 | break;
|
---|
| 2667 |
|
---|
| 2668 | case TOR:
|
---|
| 2669 | case TAND:
|
---|
| 2670 | rv = execute(t->left, pin, pout, 0);
|
---|
| 2671 | if ((t1 = t->right) != NULL && (rv == 0) == (t->type == TAND))
|
---|
| 2672 | rv = execute(t1, pin, pout, 0);
|
---|
| 2673 | break;
|
---|
| 2674 |
|
---|
| 2675 | case TFOR:
|
---|
| 2676 | if (wp == NULL) {
|
---|
| 2677 | wp = dolv + 1;
|
---|
| 2678 | if ((i = dolc) < 0)
|
---|
| 2679 | i = 0;
|
---|
| 2680 | } else {
|
---|
| 2681 | i = -1;
|
---|
| 2682 | while (*wp++ != NULL);
|
---|
| 2683 | }
|
---|
| 2684 | vp = lookup(t->str);
|
---|
| 2685 | while (setjmp(bc.brkpt))
|
---|
| 2686 | if (isbreak)
|
---|
| 2687 | goto broken;
|
---|
| 2688 | brkset(&bc);
|
---|
| 2689 | for (t1 = t->left; i-- && *wp != NULL;) {
|
---|
| 2690 | setval(vp, *wp++);
|
---|
| 2691 | rv = execute(t1, pin, pout, 0);
|
---|
| 2692 | }
|
---|
| 2693 | brklist = brklist->nextlev;
|
---|
| 2694 | break;
|
---|
| 2695 |
|
---|
| 2696 | case TWHILE:
|
---|
| 2697 | case TUNTIL:
|
---|
| 2698 | while (setjmp(bc.brkpt))
|
---|
| 2699 | if (isbreak)
|
---|
| 2700 | goto broken;
|
---|
| 2701 | brkset(&bc);
|
---|
| 2702 | t1 = t->left;
|
---|
| 2703 | while ((execute(t1, pin, pout, 0) == 0) == (t->type == TWHILE))
|
---|
| 2704 | rv = execute(t->right, pin, pout, 0);
|
---|
| 2705 | brklist = brklist->nextlev;
|
---|
| 2706 | break;
|
---|
| 2707 |
|
---|
| 2708 | case TIF:
|
---|
| 2709 | case TELIF:
|
---|
| 2710 | if (t->right != NULL) {
|
---|
| 2711 | rv = !execute(t->left, pin, pout, 0) ?
|
---|
| 2712 | execute(t->right->left, pin, pout, 0) :
|
---|
| 2713 | execute(t->right->right, pin, pout, 0);
|
---|
| 2714 | }
|
---|
| 2715 | break;
|
---|
| 2716 |
|
---|
| 2717 | case TCASE:
|
---|
| 2718 | if ((cp = evalstr(t->str, DOSUB | DOTRIM)) == 0)
|
---|
| 2719 | cp = "";
|
---|
| 2720 |
|
---|
| 2721 | DBGPRINTF7(("EXECUTE: TCASE, t->str is %s, cp is %s\n",
|
---|
| 2722 | ((t->str == NULL) ? "NULL" : t->str),
|
---|
| 2723 | ((cp == NULL) ? "NULL" : cp)));
|
---|
| 2724 |
|
---|
| 2725 | if ((t1 = findcase(t->left, cp)) != NULL) {
|
---|
| 2726 | DBGPRINTF7(("EXECUTE: TCASE, calling execute(t=%p, t1=%p)...\n", t, t1));
|
---|
| 2727 | rv = execute(t1, pin, pout, 0);
|
---|
| 2728 | DBGPRINTF7(("EXECUTE: TCASE, back from execute(t=%p, t1=%p)...\n", t, t1));
|
---|
| 2729 | }
|
---|
| 2730 | break;
|
---|
| 2731 |
|
---|
| 2732 | case TBRACE:
|
---|
| 2733 | /*
|
---|
| 2734 | if (iopp = t->ioact)
|
---|
| 2735 | while (*iopp)
|
---|
| 2736 | if (iosetup(*iopp++, pin!=NULL, pout!=NULL)) {
|
---|
| 2737 | rv = -1;
|
---|
| 2738 | break;
|
---|
| 2739 | }
|
---|
| 2740 | */
|
---|
| 2741 | if (rv >= 0 && (t1 = t->left))
|
---|
| 2742 | rv = execute(t1, pin, pout, 0);
|
---|
| 2743 | break;
|
---|
| 2744 |
|
---|
| 2745 | };
|
---|
| 2746 |
|
---|
| 2747 | broken:
|
---|
| 2748 | t->words = wp2;
|
---|
| 2749 | isbreak = 0;
|
---|
| 2750 | freehere(areanum);
|
---|
| 2751 | freearea(areanum);
|
---|
| 2752 | areanum = a;
|
---|
| 2753 | if (interactive && intr) {
|
---|
| 2754 | closeall();
|
---|
| 2755 | fail();
|
---|
| 2756 | }
|
---|
| 2757 |
|
---|
| 2758 | if ((i = trapset) != 0) {
|
---|
| 2759 | trapset = 0;
|
---|
| 2760 | runtrap(i);
|
---|
| 2761 | }
|
---|
| 2762 |
|
---|
| 2763 | DBGPRINTF(("EXECUTE: returning from t=%p, rv=%d\n", t, rv));
|
---|
| 2764 | return (rv);
|
---|
| 2765 | }
|
---|
| 2766 |
|
---|
| 2767 | static int
|
---|
| 2768 | forkexec(REGISTER struct op *t, int *pin, int *pout, int act, char **wp)
|
---|
| 2769 | {
|
---|
| 2770 | pid_t newpid;
|
---|
| 2771 | int i, rv;
|
---|
| 2772 | int (*shcom) (struct op *) = NULL;
|
---|
| 2773 | REGISTER int f;
|
---|
| 2774 | char *cp = NULL;
|
---|
| 2775 | struct ioword **iopp;
|
---|
| 2776 | int resetsig;
|
---|
| 2777 | char **owp;
|
---|
| 2778 | int forked = 0;
|
---|
| 2779 |
|
---|
| 2780 | int *hpin = pin;
|
---|
| 2781 | int *hpout = pout;
|
---|
| 2782 | char *hwp;
|
---|
| 2783 | int hinteractive;
|
---|
| 2784 | int hintr;
|
---|
| 2785 | struct brkcon *hbrklist;
|
---|
| 2786 | int hexecflg;
|
---|
| 2787 |
|
---|
| 2788 | #if __GNUC__
|
---|
| 2789 | /* Avoid longjmp clobbering */
|
---|
| 2790 | (void) &pin;
|
---|
| 2791 | (void) &pout;
|
---|
| 2792 | (void) ℘
|
---|
| 2793 | (void) &shcom;
|
---|
| 2794 | (void) &cp;
|
---|
| 2795 | (void) &resetsig;
|
---|
| 2796 | (void) &owp;
|
---|
| 2797 | #endif
|
---|
| 2798 |
|
---|
| 2799 | DBGPRINTF(("FORKEXEC: t=%p, pin %p, pout %p, act %d\n", t, pin,
|
---|
| 2800 | pout, act));
|
---|
| 2801 | DBGPRINTF7(("FORKEXEC: t->words is %s\n",
|
---|
| 2802 | ((t->words == NULL) ? "NULL" : t->words[0])));
|
---|
| 2803 |
|
---|
| 2804 | /* Hard to know how many words there are, be careful of garbage pointer values */
|
---|
| 2805 | /* They are likely to cause "PCI bus fault" errors */
|
---|
| 2806 | #if 0
|
---|
| 2807 | DBGPRINTF7(("FORKEXEC: t->words is %s, t->words[1] is %s\n",
|
---|
| 2808 | ((t->words == NULL) ? "NULL" : t->words[0]),
|
---|
| 2809 | ((t->words == NULL) ? "NULL" : t->words[1])));
|
---|
| 2810 | DBGPRINTF7(("FORKEXEC: wp is %s, wp[1] is %s\n",
|
---|
| 2811 | ((wp == NULL) ? "NULL" : wp[0]),
|
---|
| 2812 | ((wp[1] == NULL) ? "NULL" : wp[1])));
|
---|
| 2813 | DBGPRINTF7(("FORKEXEC: wp2 is %s, wp[3] is %s\n",
|
---|
| 2814 | ((wp[2] == NULL) ? "NULL" : wp[2]),
|
---|
| 2815 | ((wp[3] == NULL) ? "NULL" : wp[3])));
|
---|
| 2816 | #endif
|
---|
| 2817 |
|
---|
| 2818 |
|
---|
| 2819 | owp = wp;
|
---|
| 2820 | resetsig = 0;
|
---|
| 2821 | rv = -1; /* system-detected error */
|
---|
| 2822 | if (t->type == TCOM) {
|
---|
| 2823 | while ((cp = *wp++) != NULL);
|
---|
| 2824 | cp = *wp;
|
---|
| 2825 |
|
---|
| 2826 | /* strip all initial assignments */
|
---|
| 2827 | /* not correct wrt PATH=yyy command etc */
|
---|
| 2828 | if (flag['x']) {
|
---|
| 2829 | DBGPRINTF9(("FORKEXEC: echo'ing, cp=%p, wp=%p, owp=%p\n",
|
---|
| 2830 | cp, wp, owp));
|
---|
| 2831 | echo(cp ? wp : owp);
|
---|
| 2832 | }
|
---|
| 2833 | #if 0
|
---|
| 2834 | DBGPRINTF9(("FORKEXEC: t->words is %s, t->words[1] is %s\n",
|
---|
| 2835 | ((t->words == NULL) ? "NULL" : t->words[0]),
|
---|
| 2836 | ((t->words == NULL) ? "NULL" : t->words[1])));
|
---|
| 2837 | DBGPRINTF9(("FORKEXEC: wp is %s, wp[1] is %s\n",
|
---|
| 2838 | ((wp == NULL) ? "NULL" : wp[0]),
|
---|
| 2839 | ((wp == NULL) ? "NULL" : wp[1])));
|
---|
| 2840 | #endif
|
---|
| 2841 |
|
---|
| 2842 | if (cp == NULL && t->ioact == NULL) {
|
---|
| 2843 | while ((cp = *owp++) != NULL && assign(cp, COPYV));
|
---|
| 2844 | DBGPRINTF(("FORKEXEC: returning setstatus()\n"));
|
---|
| 2845 | return (setstatus(0));
|
---|
| 2846 | } else if (cp != NULL) {
|
---|
| 2847 | shcom = inbuilt(cp);
|
---|
| 2848 | }
|
---|
| 2849 | }
|
---|
| 2850 |
|
---|
| 2851 | t->words = wp;
|
---|
| 2852 | f = act;
|
---|
| 2853 |
|
---|
| 2854 | #if 0
|
---|
| 2855 | DBGPRINTF3(("FORKEXEC: t->words is %s, t->words[1] is %s\n",
|
---|
| 2856 | ((t->words == NULL) ? "NULL" : t->words[0]),
|
---|
| 2857 | ((t->words == NULL) ? "NULL" : t->words[1])));
|
---|
| 2858 | #endif
|
---|
| 2859 | DBGPRINTF(("FORKEXEC: shcom %p, f&FEXEC 0x%x, owp %p\n", shcom,
|
---|
| 2860 | f & FEXEC, owp));
|
---|
| 2861 |
|
---|
| 2862 | if (shcom == NULL && (f & FEXEC) == 0) {
|
---|
| 2863 | /* Save values in case the child process alters them */
|
---|
| 2864 | hpin = pin;
|
---|
| 2865 | hpout = pout;
|
---|
| 2866 | hwp = *wp;
|
---|
| 2867 | hinteractive = interactive;
|
---|
| 2868 | hintr = intr;
|
---|
| 2869 | hbrklist = brklist;
|
---|
| 2870 | hexecflg = execflg;
|
---|
| 2871 |
|
---|
| 2872 | DBGPRINTF3(("FORKEXEC: calling vfork()...\n"));
|
---|
| 2873 |
|
---|
| 2874 | newpid = vfork();
|
---|
| 2875 |
|
---|
| 2876 | if (newpid == -1) {
|
---|
| 2877 | DBGPRINTF(("FORKEXEC: ERROR, unable to vfork()!\n"));
|
---|
| 2878 | return (-1);
|
---|
| 2879 | }
|
---|
| 2880 |
|
---|
| 2881 |
|
---|
| 2882 | if (newpid > 0) { /* Parent */
|
---|
| 2883 |
|
---|
| 2884 | /* Restore values */
|
---|
| 2885 | pin = hpin;
|
---|
| 2886 | pout = hpout;
|
---|
| 2887 | *wp = hwp;
|
---|
| 2888 | interactive = hinteractive;
|
---|
| 2889 | intr = hintr;
|
---|
| 2890 | brklist = hbrklist;
|
---|
| 2891 | execflg = hexecflg;
|
---|
| 2892 |
|
---|
| 2893 | /* moved up
|
---|
| 2894 | if (i == -1)
|
---|
| 2895 | return(rv);
|
---|
| 2896 | */
|
---|
| 2897 |
|
---|
| 2898 | if (pin != NULL)
|
---|
| 2899 | closepipe(pin);
|
---|
| 2900 |
|
---|
| 2901 | return (pout == NULL ? setstatus(waitfor(newpid, 0)) : 0);
|
---|
| 2902 | }
|
---|
| 2903 |
|
---|
| 2904 | /* Must be the child process, pid should be 0 */
|
---|
| 2905 | DBGPRINTF(("FORKEXEC: child process, shcom=%p\n", shcom));
|
---|
| 2906 |
|
---|
| 2907 | if (interactive) {
|
---|
| 2908 | signal(SIGINT, SIG_IGN);
|
---|
| 2909 | signal(SIGQUIT, SIG_IGN);
|
---|
| 2910 | resetsig = 1;
|
---|
| 2911 | }
|
---|
| 2912 | interactive = 0;
|
---|
| 2913 | intr = 0;
|
---|
| 2914 | forked = 1;
|
---|
| 2915 | brklist = 0;
|
---|
| 2916 | execflg = 0;
|
---|
| 2917 | }
|
---|
| 2918 |
|
---|
| 2919 |
|
---|
| 2920 | if (owp != NULL)
|
---|
| 2921 | while ((cp = *owp++) != NULL && assign(cp, COPYV))
|
---|
| 2922 | if (shcom == NULL)
|
---|
| 2923 | export(lookup(cp));
|
---|
| 2924 |
|
---|
| 2925 | #ifdef COMPIPE
|
---|
| 2926 | if ((pin != NULL || pout != NULL) && shcom != NULL && shcom != doexec) {
|
---|
| 2927 | err("piping to/from shell builtins not yet done");
|
---|
| 2928 | if (forked)
|
---|
| 2929 | _exit(-1);
|
---|
| 2930 | return (-1);
|
---|
| 2931 | }
|
---|
| 2932 | #endif
|
---|
| 2933 |
|
---|
| 2934 | if (pin != NULL) {
|
---|
| 2935 | dup2(pin[0], 0);
|
---|
| 2936 | closepipe(pin);
|
---|
| 2937 | }
|
---|
| 2938 | if (pout != NULL) {
|
---|
| 2939 | dup2(pout[1], 1);
|
---|
| 2940 | closepipe(pout);
|
---|
| 2941 | }
|
---|
| 2942 |
|
---|
| 2943 | if ((iopp = t->ioact) != NULL) {
|
---|
| 2944 | if (shcom != NULL && shcom != doexec) {
|
---|
| 2945 | prs(cp);
|
---|
| 2946 | err(": cannot redirect shell command");
|
---|
| 2947 | if (forked)
|
---|
| 2948 | _exit(-1);
|
---|
| 2949 | return (-1);
|
---|
| 2950 | }
|
---|
| 2951 | while (*iopp)
|
---|
| 2952 | if (iosetup(*iopp++, pin != NULL, pout != NULL)) {
|
---|
| 2953 | if (forked)
|
---|
| 2954 | _exit(rv);
|
---|
| 2955 | return (rv);
|
---|
| 2956 | }
|
---|
| 2957 | }
|
---|
| 2958 |
|
---|
| 2959 | if (shcom) {
|
---|
| 2960 | i = setstatus((*shcom) (t));
|
---|
| 2961 | if (forked)
|
---|
| 2962 | _exit(i);
|
---|
| 2963 | DBGPRINTF(("FORKEXEC: returning i=%d\n", i));
|
---|
| 2964 | return (i);
|
---|
| 2965 | }
|
---|
| 2966 |
|
---|
| 2967 | /* should use FIOCEXCL */
|
---|
| 2968 | for (i = FDBASE; i < NOFILE; i++)
|
---|
| 2969 | close(i);
|
---|
| 2970 | if (resetsig) {
|
---|
| 2971 | signal(SIGINT, SIG_DFL);
|
---|
| 2972 | signal(SIGQUIT, SIG_DFL);
|
---|
| 2973 | }
|
---|
| 2974 |
|
---|
| 2975 | if (t->type == TPAREN)
|
---|
| 2976 | _exit(execute(t->left, NOPIPE, NOPIPE, FEXEC));
|
---|
| 2977 | if (wp[0] == NULL)
|
---|
| 2978 | _exit(0);
|
---|
| 2979 |
|
---|
| 2980 | cp = rexecve(wp[0], wp, makenv(0, NULL));
|
---|
| 2981 | prs(wp[0]);
|
---|
| 2982 | prs(": ");
|
---|
| 2983 | err(cp);
|
---|
| 2984 | if (!execflg)
|
---|
| 2985 | trap[0] = NULL;
|
---|
| 2986 |
|
---|
| 2987 | DBGPRINTF(("FORKEXEC: calling leave(), pid=%d\n", newpid));
|
---|
| 2988 |
|
---|
| 2989 | leave();
|
---|
| 2990 | /* NOTREACHED */
|
---|
| 2991 | _exit(1);
|
---|
| 2992 | }
|
---|
| 2993 |
|
---|
| 2994 | /*
|
---|
| 2995 | * 0< 1> are ignored as required
|
---|
| 2996 | * within pipelines.
|
---|
| 2997 | */
|
---|
| 2998 | static int iosetup(REGISTER struct ioword *iop, int pipein, int pipeout)
|
---|
| 2999 | {
|
---|
| 3000 | REGISTER int u = -1;
|
---|
| 3001 | char *cp = NULL, *msg;
|
---|
| 3002 |
|
---|
| 3003 | DBGPRINTF(("IOSETUP: iop %p, pipein %i, pipeout %i\n", iop,
|
---|
| 3004 | pipein, pipeout));
|
---|
| 3005 |
|
---|
| 3006 | if (iop->io_unit == IODEFAULT) /* take default */
|
---|
| 3007 | iop->io_unit = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1;
|
---|
| 3008 |
|
---|
| 3009 | if (pipein && iop->io_unit == 0)
|
---|
| 3010 | return (0);
|
---|
| 3011 |
|
---|
| 3012 | if (pipeout && iop->io_unit == 1)
|
---|
| 3013 | return (0);
|
---|
| 3014 |
|
---|
| 3015 | msg = iop->io_flag & (IOREAD | IOHERE) ? "open" : "create";
|
---|
| 3016 | if ((iop->io_flag & IOHERE) == 0) {
|
---|
| 3017 | cp = iop->io_name;
|
---|
| 3018 | if ((cp = evalstr(cp, DOSUB | DOTRIM)) == NULL)
|
---|
| 3019 | return (1);
|
---|
| 3020 | }
|
---|
| 3021 |
|
---|
| 3022 | if (iop->io_flag & IODUP) {
|
---|
| 3023 | if (cp[1] || (!isdigit(*cp) && *cp != '-')) {
|
---|
| 3024 | prs(cp);
|
---|
| 3025 | err(": illegal >& argument");
|
---|
| 3026 | return (1);
|
---|
| 3027 | }
|
---|
| 3028 | if (*cp == '-')
|
---|
| 3029 | iop->io_flag = IOCLOSE;
|
---|
| 3030 | iop->io_flag &= ~(IOREAD | IOWRITE);
|
---|
| 3031 | }
|
---|
| 3032 | switch (iop->io_flag) {
|
---|
| 3033 | case IOREAD:
|
---|
| 3034 | u = open(cp, 0);
|
---|
| 3035 | break;
|
---|
| 3036 |
|
---|
| 3037 | case IOHERE:
|
---|
| 3038 | case IOHERE | IOXHERE:
|
---|
| 3039 | u = herein(iop->io_name, iop->io_flag & IOXHERE);
|
---|
| 3040 | cp = "here file";
|
---|
| 3041 | break;
|
---|
| 3042 |
|
---|
| 3043 | case IOWRITE | IOCAT:
|
---|
| 3044 | if ((u = open(cp, 1)) >= 0) {
|
---|
| 3045 | lseek(u, (long) 0, 2);
|
---|
| 3046 | break;
|
---|
| 3047 | }
|
---|
| 3048 | case IOWRITE:
|
---|
| 3049 | u = creat(cp, 0666);
|
---|
| 3050 | break;
|
---|
| 3051 |
|
---|
| 3052 | case IODUP:
|
---|
| 3053 | u = dup2(*cp - '0', iop->io_unit);
|
---|
| 3054 | break;
|
---|
| 3055 |
|
---|
| 3056 | case IOCLOSE:
|
---|
| 3057 | close(iop->io_unit);
|
---|
| 3058 | return (0);
|
---|
| 3059 | }
|
---|
| 3060 | if (u < 0) {
|
---|
| 3061 | prs(cp);
|
---|
| 3062 | prs(": cannot ");
|
---|
| 3063 | warn(msg);
|
---|
| 3064 | return (1);
|
---|
| 3065 | } else {
|
---|
| 3066 | if (u != iop->io_unit) {
|
---|
| 3067 | dup2(u, iop->io_unit);
|
---|
| 3068 | close(u);
|
---|
| 3069 | }
|
---|
| 3070 | }
|
---|
| 3071 | return (0);
|
---|
| 3072 | }
|
---|
| 3073 |
|
---|
| 3074 | static void echo(REGISTER char **wp)
|
---|
| 3075 | {
|
---|
| 3076 | REGISTER int i;
|
---|
| 3077 |
|
---|
| 3078 | prs("+");
|
---|
| 3079 | for (i = 0; wp[i]; i++) {
|
---|
| 3080 | if (i)
|
---|
| 3081 | prs(" ");
|
---|
| 3082 | prs(wp[i]);
|
---|
| 3083 | }
|
---|
| 3084 | prs("\n");
|
---|
| 3085 | }
|
---|
| 3086 |
|
---|
| 3087 | static struct op **find1case(struct op *t, char *w)
|
---|
| 3088 | {
|
---|
| 3089 | REGISTER struct op *t1;
|
---|
| 3090 | struct op **tp;
|
---|
| 3091 | REGISTER char **wp, *cp;
|
---|
| 3092 |
|
---|
| 3093 |
|
---|
| 3094 | if (t == NULL) {
|
---|
| 3095 | DBGPRINTF3(("FIND1CASE: enter, t==NULL, returning.\n"));
|
---|
| 3096 | return ((struct op **) NULL);
|
---|
| 3097 | }
|
---|
| 3098 |
|
---|
| 3099 | DBGPRINTF3(("FIND1CASE: enter, t->type=%d (%s)\n", t->type,
|
---|
| 3100 | T_CMD_NAMES[t->type]));
|
---|
| 3101 |
|
---|
| 3102 | if (t->type == TLIST) {
|
---|
| 3103 | if ((tp = find1case(t->left, w)) != NULL) {
|
---|
| 3104 | DBGPRINTF3(("FIND1CASE: found one to the left, returning tp=%p\n", tp));
|
---|
| 3105 | return (tp);
|
---|
| 3106 | }
|
---|
| 3107 | t1 = t->right; /* TPAT */
|
---|
| 3108 | } else
|
---|
| 3109 | t1 = t;
|
---|
| 3110 |
|
---|
| 3111 | for (wp = t1->words; *wp;)
|
---|
| 3112 | if ((cp = evalstr(*wp++, DOSUB)) && gmatch(w, cp)) {
|
---|
| 3113 | DBGPRINTF3(("FIND1CASE: returning &t1->left= %p.\n",
|
---|
| 3114 | &t1->left));
|
---|
| 3115 | return (&t1->left);
|
---|
| 3116 | }
|
---|
| 3117 |
|
---|
| 3118 | DBGPRINTF(("FIND1CASE: returning NULL\n"));
|
---|
| 3119 | return ((struct op **) NULL);
|
---|
| 3120 | }
|
---|
| 3121 |
|
---|
| 3122 | static struct op *findcase(struct op *t, char *w)
|
---|
| 3123 | {
|
---|
| 3124 | REGISTER struct op **tp;
|
---|
| 3125 |
|
---|
| 3126 | return ((tp = find1case(t, w)) != NULL ? *tp : (struct op *) NULL);
|
---|
| 3127 | }
|
---|
| 3128 |
|
---|
| 3129 | /*
|
---|
| 3130 | * Enter a new loop level (marked for break/continue).
|
---|
| 3131 | */
|
---|
| 3132 | static void brkset(struct brkcon *bc)
|
---|
| 3133 | {
|
---|
| 3134 | bc->nextlev = brklist;
|
---|
| 3135 | brklist = bc;
|
---|
| 3136 | }
|
---|
| 3137 |
|
---|
| 3138 | /*
|
---|
| 3139 | * Wait for the last process created.
|
---|
| 3140 | * Print a message for each process found
|
---|
| 3141 | * that was killed by a signal.
|
---|
| 3142 | * Ignore interrupt signals while waiting
|
---|
| 3143 | * unless `canintr' is true.
|
---|
| 3144 | */
|
---|
| 3145 | static int waitfor(REGISTER int lastpid, int canintr)
|
---|
| 3146 | {
|
---|
| 3147 | REGISTER int pid, rv;
|
---|
| 3148 | int s;
|
---|
| 3149 | int oheedint = heedint;
|
---|
| 3150 |
|
---|
| 3151 | heedint = 0;
|
---|
| 3152 | rv = 0;
|
---|
| 3153 | do {
|
---|
| 3154 | pid = wait(&s);
|
---|
| 3155 | if (pid == -1) {
|
---|
| 3156 | if (errno != EINTR || canintr)
|
---|
| 3157 | break;
|
---|
| 3158 | } else {
|
---|
| 3159 | if ((rv = WAITSIG(s)) != 0) {
|
---|
| 3160 | if (rv < NSIGNAL) {
|
---|
| 3161 | if (signame[rv] != NULL) {
|
---|
| 3162 | if (pid != lastpid) {
|
---|
| 3163 | prn(pid);
|
---|
| 3164 | prs(": ");
|
---|
| 3165 | }
|
---|
| 3166 | prs(signame[rv]);
|
---|
| 3167 | }
|
---|
| 3168 | } else {
|
---|
| 3169 | if (pid != lastpid) {
|
---|
| 3170 | prn(pid);
|
---|
| 3171 | prs(": ");
|
---|
| 3172 | }
|
---|
| 3173 | prs("Signal ");
|
---|
| 3174 | prn(rv);
|
---|
| 3175 | prs(" ");
|
---|
| 3176 | }
|
---|
| 3177 | if (WAITCORE(s))
|
---|
| 3178 | prs(" - core dumped");
|
---|
| 3179 | if (rv >= NSIGNAL || signame[rv])
|
---|
| 3180 | prs("\n");
|
---|
| 3181 | rv = -1;
|
---|
| 3182 | } else
|
---|
| 3183 | rv = WAITVAL(s);
|
---|
| 3184 | }
|
---|
| 3185 | } while (pid != lastpid);
|
---|
| 3186 | heedint = oheedint;
|
---|
| 3187 | if (intr) {
|
---|
| 3188 | if (interactive) {
|
---|
| 3189 | if (canintr)
|
---|
| 3190 | intr = 0;
|
---|
| 3191 | } else {
|
---|
| 3192 | if (exstat == 0)
|
---|
| 3193 | exstat = rv;
|
---|
| 3194 | onintr(0);
|
---|
| 3195 | }
|
---|
| 3196 | }
|
---|
| 3197 | return (rv);
|
---|
| 3198 | }
|
---|
| 3199 |
|
---|
| 3200 | static int setstatus(REGISTER int s)
|
---|
| 3201 | {
|
---|
| 3202 | exstat = s;
|
---|
| 3203 | setval(lookup("?"), putn(s));
|
---|
| 3204 | return (s);
|
---|
| 3205 | }
|
---|
| 3206 |
|
---|
| 3207 | /*
|
---|
| 3208 | * PATH-searching interface to execve.
|
---|
| 3209 | * If getenv("PATH") were kept up-to-date,
|
---|
| 3210 | * execvp might be used.
|
---|
| 3211 | */
|
---|
| 3212 | static char *rexecve(char *c, char **v, char **envp)
|
---|
| 3213 | {
|
---|
| 3214 | REGISTER int i;
|
---|
| 3215 | REGISTER char *sp, *tp;
|
---|
| 3216 | int eacces = 0, asis = 0;
|
---|
| 3217 | char *name = c;
|
---|
| 3218 |
|
---|
[904] | 3219 | if (ENABLE_FEATURE_SH_STANDALONE_SHELL) {
|
---|
| 3220 | optind = 1;
|
---|
| 3221 | if (find_applet_by_name(name)) {
|
---|
| 3222 | /* We have to exec here since we vforked. Running
|
---|
| 3223 | * run_applet_by_name() won't work and bad things
|
---|
| 3224 | * will happen. */
|
---|
| 3225 | execve(CONFIG_BUSYBOX_EXEC_PATH, v, envp);
|
---|
| 3226 | }
|
---|
[821] | 3227 | }
|
---|
| 3228 |
|
---|
| 3229 | DBGPRINTF(("REXECVE: c=%p, v=%p, envp=%p\n", c, v, envp));
|
---|
| 3230 |
|
---|
| 3231 | sp = any('/', c) ? "" : path->value;
|
---|
| 3232 | asis = *sp == '\0';
|
---|
| 3233 | while (asis || *sp != '\0') {
|
---|
| 3234 | asis = 0;
|
---|
| 3235 | tp = e.linep;
|
---|
| 3236 | for (; *sp != '\0'; tp++)
|
---|
| 3237 | if ((*tp = *sp++) == ':') {
|
---|
| 3238 | asis = *sp == '\0';
|
---|
| 3239 | break;
|
---|
| 3240 | }
|
---|
| 3241 | if (tp != e.linep)
|
---|
| 3242 | *tp++ = '/';
|
---|
| 3243 | for (i = 0; (*tp++ = c[i++]) != '\0';);
|
---|
| 3244 |
|
---|
| 3245 | DBGPRINTF3(("REXECVE: e.linep is %s\n", e.linep));
|
---|
| 3246 |
|
---|
| 3247 | execve(e.linep, v, envp);
|
---|
| 3248 |
|
---|
| 3249 | switch (errno) {
|
---|
| 3250 | case ENOEXEC:
|
---|
| 3251 | *v = e.linep;
|
---|
| 3252 | tp = *--v;
|
---|
| 3253 | *v = e.linep;
|
---|
| 3254 | execve(DEFAULT_SHELL, v, envp);
|
---|
| 3255 | *v = tp;
|
---|
| 3256 | return ("no Shell");
|
---|
| 3257 |
|
---|
| 3258 | case ENOMEM:
|
---|
| 3259 | return ((char *) bb_msg_memory_exhausted);
|
---|
| 3260 |
|
---|
| 3261 | case E2BIG:
|
---|
| 3262 | return ("argument list too long");
|
---|
| 3263 |
|
---|
| 3264 | case EACCES:
|
---|
| 3265 | eacces++;
|
---|
| 3266 | break;
|
---|
| 3267 | }
|
---|
| 3268 | }
|
---|
| 3269 | return (errno == ENOENT ? "not found" : "cannot execute");
|
---|
| 3270 | }
|
---|
| 3271 |
|
---|
| 3272 | /*
|
---|
| 3273 | * Run the command produced by generator `f'
|
---|
| 3274 | * applied to stream `arg'.
|
---|
| 3275 | */
|
---|
| 3276 | static int run(struct ioarg *argp, int (*f) (struct ioarg *))
|
---|
| 3277 | {
|
---|
| 3278 | struct op *otree;
|
---|
| 3279 | struct wdblock *swdlist;
|
---|
| 3280 | struct wdblock *siolist;
|
---|
| 3281 | jmp_buf ev, rt;
|
---|
| 3282 | xint *ofail;
|
---|
| 3283 | int rv;
|
---|
| 3284 |
|
---|
| 3285 | #if __GNUC__
|
---|
| 3286 | /* Avoid longjmp clobbering */
|
---|
| 3287 | (void) &rv;
|
---|
| 3288 | #endif
|
---|
| 3289 |
|
---|
| 3290 | DBGPRINTF(("RUN: enter, areanum %d, outtree %p, failpt %p\n",
|
---|
| 3291 | areanum, outtree, failpt));
|
---|
| 3292 |
|
---|
| 3293 | areanum++;
|
---|
| 3294 | swdlist = wdlist;
|
---|
| 3295 | siolist = iolist;
|
---|
| 3296 | otree = outtree;
|
---|
| 3297 | ofail = failpt;
|
---|
| 3298 | rv = -1;
|
---|
| 3299 |
|
---|
| 3300 | if (newenv(setjmp(errpt = ev)) == 0) {
|
---|
| 3301 | wdlist = 0;
|
---|
| 3302 | iolist = 0;
|
---|
| 3303 | pushio(argp, f);
|
---|
| 3304 | e.iobase = e.iop;
|
---|
| 3305 | yynerrs = 0;
|
---|
| 3306 | if (setjmp(failpt = rt) == 0 && yyparse() == 0)
|
---|
| 3307 | rv = execute(outtree, NOPIPE, NOPIPE, 0);
|
---|
| 3308 | quitenv();
|
---|
| 3309 | } else {
|
---|
| 3310 | DBGPRINTF(("RUN: error from newenv()!\n"));
|
---|
| 3311 | }
|
---|
| 3312 |
|
---|
| 3313 | wdlist = swdlist;
|
---|
| 3314 | iolist = siolist;
|
---|
| 3315 | failpt = ofail;
|
---|
| 3316 | outtree = otree;
|
---|
| 3317 | freearea(areanum--);
|
---|
| 3318 |
|
---|
| 3319 | return (rv);
|
---|
| 3320 | }
|
---|
| 3321 |
|
---|
| 3322 | /* -------- do.c -------- */
|
---|
| 3323 |
|
---|
| 3324 | /*
|
---|
| 3325 | * built-in commands: doX
|
---|
| 3326 | */
|
---|
| 3327 |
|
---|
| 3328 | static int dohelp(struct op *t)
|
---|
| 3329 | {
|
---|
| 3330 | int col;
|
---|
| 3331 | const struct builtincmd *x;
|
---|
| 3332 |
|
---|
| 3333 | printf("\nBuilt-in commands:\n");
|
---|
| 3334 | printf("-------------------\n");
|
---|
| 3335 |
|
---|
| 3336 | for (col = 0, x = builtincmds; x->builtinfunc != NULL; x++) {
|
---|
| 3337 | if (!x->name)
|
---|
| 3338 | continue;
|
---|
| 3339 | col += printf("%s%s", ((col == 0) ? "\t" : " "), x->name);
|
---|
| 3340 | if (col > 60) {
|
---|
| 3341 | printf("\n");
|
---|
| 3342 | col = 0;
|
---|
| 3343 | }
|
---|
| 3344 | }
|
---|
| 3345 | #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
|
---|
| 3346 | {
|
---|
| 3347 | int i;
|
---|
| 3348 | const struct BB_applet *applet;
|
---|
| 3349 | extern const struct BB_applet applets[];
|
---|
| 3350 | extern const size_t NUM_APPLETS;
|
---|
| 3351 |
|
---|
| 3352 | for (i = 0, applet = applets; i < NUM_APPLETS; applet++, i++) {
|
---|
| 3353 | if (!applet->name)
|
---|
| 3354 | continue;
|
---|
| 3355 |
|
---|
| 3356 | col += printf("%s%s", ((col == 0) ? "\t" : " "), applet->name);
|
---|
| 3357 | if (col > 60) {
|
---|
| 3358 | printf("\n");
|
---|
| 3359 | col = 0;
|
---|
| 3360 | }
|
---|
| 3361 | }
|
---|
| 3362 | }
|
---|
| 3363 | #endif
|
---|
| 3364 | printf("\n\n");
|
---|
| 3365 | return EXIT_SUCCESS;
|
---|
| 3366 | }
|
---|
| 3367 |
|
---|
| 3368 |
|
---|
| 3369 |
|
---|
| 3370 | static int dolabel(struct op *t)
|
---|
| 3371 | {
|
---|
| 3372 | return (0);
|
---|
| 3373 | }
|
---|
| 3374 |
|
---|
| 3375 | static int dochdir(REGISTER struct op *t)
|
---|
| 3376 | {
|
---|
| 3377 | REGISTER char *cp, *er;
|
---|
| 3378 |
|
---|
| 3379 | if ((cp = t->words[1]) == NULL && (cp = homedir->value) == NULL)
|
---|
| 3380 | er = ": no home directory";
|
---|
| 3381 | else if (chdir(cp) < 0)
|
---|
| 3382 | er = ": bad directory";
|
---|
| 3383 | else
|
---|
| 3384 | return (0);
|
---|
| 3385 | prs(cp != NULL ? cp : "cd");
|
---|
| 3386 | err(er);
|
---|
| 3387 | return (1);
|
---|
| 3388 | }
|
---|
| 3389 |
|
---|
| 3390 | static int doshift(REGISTER struct op *t)
|
---|
| 3391 | {
|
---|
| 3392 | REGISTER int n;
|
---|
| 3393 |
|
---|
| 3394 | n = t->words[1] ? getn(t->words[1]) : 1;
|
---|
| 3395 | if (dolc < n) {
|
---|
| 3396 | err("nothing to shift");
|
---|
| 3397 | return (1);
|
---|
| 3398 | }
|
---|
| 3399 | dolv[n] = dolv[0];
|
---|
| 3400 | dolv += n;
|
---|
| 3401 | dolc -= n;
|
---|
| 3402 | setval(lookup("#"), putn(dolc));
|
---|
| 3403 | return (0);
|
---|
| 3404 | }
|
---|
| 3405 |
|
---|
| 3406 | /*
|
---|
| 3407 | * execute login and newgrp directly
|
---|
| 3408 | */
|
---|
| 3409 | static int dologin(struct op *t)
|
---|
| 3410 | {
|
---|
| 3411 | REGISTER char *cp;
|
---|
| 3412 |
|
---|
| 3413 | if (interactive) {
|
---|
| 3414 | signal(SIGINT, SIG_DFL);
|
---|
| 3415 | signal(SIGQUIT, SIG_DFL);
|
---|
| 3416 | }
|
---|
| 3417 | cp = rexecve(t->words[0], t->words, makenv(0, NULL));
|
---|
| 3418 | prs(t->words[0]);
|
---|
| 3419 | prs(": ");
|
---|
| 3420 | err(cp);
|
---|
| 3421 | return (1);
|
---|
| 3422 | }
|
---|
| 3423 |
|
---|
| 3424 | static int doumask(REGISTER struct op *t)
|
---|
| 3425 | {
|
---|
| 3426 | REGISTER int i, n;
|
---|
| 3427 | REGISTER char *cp;
|
---|
| 3428 |
|
---|
| 3429 | if ((cp = t->words[1]) == NULL) {
|
---|
| 3430 | i = umask(0);
|
---|
| 3431 | umask(i);
|
---|
| 3432 | for (n = 3 * 4; (n -= 3) >= 0;)
|
---|
| 3433 | putc('0' + ((i >> n) & 07), stderr);
|
---|
| 3434 | putc('\n', stderr);
|
---|
| 3435 | } else {
|
---|
| 3436 | for (n = 0; *cp >= '0' && *cp <= '9'; cp++)
|
---|
| 3437 | n = n * 8 + (*cp - '0');
|
---|
| 3438 | umask(n);
|
---|
| 3439 | }
|
---|
| 3440 | return (0);
|
---|
| 3441 | }
|
---|
| 3442 |
|
---|
| 3443 | static int doexec(REGISTER struct op *t)
|
---|
| 3444 | {
|
---|
| 3445 | REGISTER int i;
|
---|
| 3446 | jmp_buf ex;
|
---|
| 3447 | xint *ofail;
|
---|
| 3448 |
|
---|
| 3449 | t->ioact = NULL;
|
---|
| 3450 | for (i = 0; (t->words[i] = t->words[i + 1]) != NULL; i++);
|
---|
| 3451 | if (i == 0)
|
---|
| 3452 | return (1);
|
---|
| 3453 | execflg = 1;
|
---|
| 3454 | ofail = failpt;
|
---|
| 3455 | if (setjmp(failpt = ex) == 0)
|
---|
| 3456 | execute(t, NOPIPE, NOPIPE, FEXEC);
|
---|
| 3457 | failpt = ofail;
|
---|
| 3458 | execflg = 0;
|
---|
| 3459 | return (1);
|
---|
| 3460 | }
|
---|
| 3461 |
|
---|
| 3462 | static int dodot(struct op *t)
|
---|
| 3463 | {
|
---|
| 3464 | REGISTER int i;
|
---|
| 3465 | REGISTER char *sp, *tp;
|
---|
| 3466 | char *cp;
|
---|
| 3467 | int maltmp;
|
---|
| 3468 |
|
---|
| 3469 | DBGPRINTF(("DODOT: enter, t=%p, tleft %p, tright %p, e.linep is %s\n", t, t->left, t->right, ((e.linep == NULL) ? "NULL" : e.linep)));
|
---|
| 3470 |
|
---|
| 3471 | if ((cp = t->words[1]) == NULL) {
|
---|
| 3472 | DBGPRINTF(("DODOT: bad args, ret 0\n"));
|
---|
| 3473 | return (0);
|
---|
| 3474 | } else {
|
---|
| 3475 | DBGPRINTF(("DODOT: cp is %s\n", cp));
|
---|
| 3476 | }
|
---|
| 3477 |
|
---|
| 3478 | sp = any('/', cp) ? ":" : path->value;
|
---|
| 3479 |
|
---|
| 3480 | DBGPRINTF(("DODOT: sp is %s, e.linep is %s\n",
|
---|
| 3481 | ((sp == NULL) ? "NULL" : sp),
|
---|
| 3482 | ((e.linep == NULL) ? "NULL" : e.linep)));
|
---|
| 3483 |
|
---|
| 3484 | while (*sp) {
|
---|
| 3485 | tp = e.linep;
|
---|
| 3486 | while (*sp && (*tp = *sp++) != ':')
|
---|
| 3487 | tp++;
|
---|
| 3488 | if (tp != e.linep)
|
---|
| 3489 | *tp++ = '/';
|
---|
| 3490 |
|
---|
| 3491 | for (i = 0; (*tp++ = cp[i++]) != '\0';);
|
---|
| 3492 |
|
---|
| 3493 | /* Original code */
|
---|
| 3494 | if ((i = open(e.linep, 0)) >= 0) {
|
---|
| 3495 | exstat = 0;
|
---|
| 3496 | maltmp = remap(i);
|
---|
| 3497 | DBGPRINTF(("DODOT: remap=%d, exstat=%d, e.iofd %d, i %d, e.linep is %s\n", maltmp, exstat, e.iofd, i, e.linep));
|
---|
| 3498 |
|
---|
| 3499 | next(maltmp); /* Basically a PUSHIO */
|
---|
| 3500 |
|
---|
| 3501 | DBGPRINTF(("DODOT: returning exstat=%d\n", exstat));
|
---|
| 3502 |
|
---|
| 3503 | return (exstat);
|
---|
| 3504 | }
|
---|
| 3505 |
|
---|
| 3506 | } /* While */
|
---|
| 3507 |
|
---|
| 3508 | prs(cp);
|
---|
| 3509 | err(": not found");
|
---|
| 3510 |
|
---|
| 3511 | return (-1);
|
---|
| 3512 | }
|
---|
| 3513 |
|
---|
| 3514 | static int dowait(struct op *t)
|
---|
| 3515 | {
|
---|
| 3516 | REGISTER int i;
|
---|
| 3517 | REGISTER char *cp;
|
---|
| 3518 |
|
---|
| 3519 | if ((cp = t->words[1]) != NULL) {
|
---|
| 3520 | i = getn(cp);
|
---|
| 3521 | if (i == 0)
|
---|
| 3522 | return (0);
|
---|
| 3523 | } else
|
---|
| 3524 | i = -1;
|
---|
| 3525 | setstatus(waitfor(i, 1));
|
---|
| 3526 | return (0);
|
---|
| 3527 | }
|
---|
| 3528 |
|
---|
| 3529 | static int doread(struct op *t)
|
---|
| 3530 | {
|
---|
| 3531 | REGISTER char *cp, **wp;
|
---|
| 3532 | REGISTER int nb = 0;
|
---|
| 3533 | REGISTER int nl = 0;
|
---|
| 3534 |
|
---|
| 3535 | if (t->words[1] == NULL) {
|
---|
| 3536 | err("Usage: read name ...");
|
---|
| 3537 | return (1);
|
---|
| 3538 | }
|
---|
| 3539 | for (wp = t->words + 1; *wp; wp++) {
|
---|
| 3540 | for (cp = e.linep; !nl && cp < elinep - 1; cp++)
|
---|
| 3541 | if ((nb = read(0, cp, sizeof(*cp))) != sizeof(*cp) ||
|
---|
| 3542 | (nl = (*cp == '\n')) || (wp[1] && any(*cp, ifs->value)))
|
---|
| 3543 | break;
|
---|
| 3544 | *cp = 0;
|
---|
| 3545 | if (nb <= 0)
|
---|
| 3546 | break;
|
---|
| 3547 | setval(lookup(*wp), e.linep);
|
---|
| 3548 | }
|
---|
| 3549 | return (nb <= 0);
|
---|
| 3550 | }
|
---|
| 3551 |
|
---|
| 3552 | static int doeval(REGISTER struct op *t)
|
---|
| 3553 | {
|
---|
| 3554 | return (RUN(awordlist, t->words + 1, wdchar));
|
---|
| 3555 | }
|
---|
| 3556 |
|
---|
| 3557 | static int dotrap(REGISTER struct op *t)
|
---|
| 3558 | {
|
---|
| 3559 | REGISTER int n, i;
|
---|
| 3560 | REGISTER int resetsig;
|
---|
| 3561 |
|
---|
| 3562 | if (t->words[1] == NULL) {
|
---|
| 3563 | for (i = 0; i <= _NSIG; i++)
|
---|
| 3564 | if (trap[i]) {
|
---|
| 3565 | prn(i);
|
---|
| 3566 | prs(": ");
|
---|
| 3567 | prs(trap[i]);
|
---|
| 3568 | prs("\n");
|
---|
| 3569 | }
|
---|
| 3570 | return (0);
|
---|
| 3571 | }
|
---|
| 3572 | resetsig = isdigit(*t->words[1]);
|
---|
| 3573 | for (i = resetsig ? 1 : 2; t->words[i] != NULL; ++i) {
|
---|
| 3574 | n = getsig(t->words[i]);
|
---|
| 3575 | freecell(trap[n]);
|
---|
| 3576 | trap[n] = 0;
|
---|
| 3577 | if (!resetsig) {
|
---|
| 3578 | if (*t->words[1] != '\0') {
|
---|
| 3579 | trap[n] = strsave(t->words[1], 0);
|
---|
| 3580 | setsig(n, sig);
|
---|
| 3581 | } else
|
---|
| 3582 | setsig(n, SIG_IGN);
|
---|
| 3583 | } else {
|
---|
| 3584 | if (interactive)
|
---|
| 3585 | if (n == SIGINT)
|
---|
| 3586 | setsig(n, onintr);
|
---|
| 3587 | else
|
---|
| 3588 | setsig(n, n == SIGQUIT ? SIG_IGN : SIG_DFL);
|
---|
| 3589 | else
|
---|
| 3590 | setsig(n, SIG_DFL);
|
---|
| 3591 | }
|
---|
| 3592 | }
|
---|
| 3593 | return (0);
|
---|
| 3594 | }
|
---|
| 3595 |
|
---|
| 3596 | static int getsig(char *s)
|
---|
| 3597 | {
|
---|
| 3598 | REGISTER int n;
|
---|
| 3599 |
|
---|
| 3600 | if ((n = getn(s)) < 0 || n > _NSIG) {
|
---|
| 3601 | err("trap: bad signal number");
|
---|
| 3602 | n = 0;
|
---|
| 3603 | }
|
---|
| 3604 | return (n);
|
---|
| 3605 | }
|
---|
| 3606 |
|
---|
| 3607 | static void setsig(REGISTER int n, sighandler_t f)
|
---|
| 3608 | {
|
---|
| 3609 | if (n == 0)
|
---|
| 3610 | return;
|
---|
| 3611 | if (signal(n, SIG_IGN) != SIG_IGN || ourtrap[n]) {
|
---|
| 3612 | ourtrap[n] = 1;
|
---|
| 3613 | signal(n, f);
|
---|
| 3614 | }
|
---|
| 3615 | }
|
---|
| 3616 |
|
---|
| 3617 | static int getn(char *as)
|
---|
| 3618 | {
|
---|
| 3619 | REGISTER char *s;
|
---|
| 3620 | REGISTER int n, m;
|
---|
| 3621 |
|
---|
| 3622 | s = as;
|
---|
| 3623 | m = 1;
|
---|
| 3624 | if (*s == '-') {
|
---|
| 3625 | m = -1;
|
---|
| 3626 | s++;
|
---|
| 3627 | }
|
---|
| 3628 | for (n = 0; isdigit(*s); s++)
|
---|
| 3629 | n = (n * 10) + (*s - '0');
|
---|
| 3630 | if (*s) {
|
---|
| 3631 | prs(as);
|
---|
| 3632 | err(": bad number");
|
---|
| 3633 | }
|
---|
| 3634 | return (n * m);
|
---|
| 3635 | }
|
---|
| 3636 |
|
---|
| 3637 | static int dobreak(struct op *t)
|
---|
| 3638 | {
|
---|
| 3639 | return (brkcontin(t->words[1], 1));
|
---|
| 3640 | }
|
---|
| 3641 |
|
---|
| 3642 | static int docontinue(struct op *t)
|
---|
| 3643 | {
|
---|
| 3644 | return (brkcontin(t->words[1], 0));
|
---|
| 3645 | }
|
---|
| 3646 |
|
---|
| 3647 | static int brkcontin(REGISTER char *cp, int val)
|
---|
| 3648 | {
|
---|
| 3649 | REGISTER struct brkcon *bc;
|
---|
| 3650 | REGISTER int nl;
|
---|
| 3651 |
|
---|
| 3652 | nl = cp == NULL ? 1 : getn(cp);
|
---|
| 3653 | if (nl <= 0)
|
---|
| 3654 | nl = 999;
|
---|
| 3655 | do {
|
---|
| 3656 | if ((bc = brklist) == NULL)
|
---|
| 3657 | break;
|
---|
| 3658 | brklist = bc->nextlev;
|
---|
| 3659 | } while (--nl);
|
---|
| 3660 | if (nl) {
|
---|
| 3661 | err("bad break/continue level");
|
---|
| 3662 | return (1);
|
---|
| 3663 | }
|
---|
| 3664 | isbreak = val;
|
---|
| 3665 | longjmp(bc->brkpt, 1);
|
---|
| 3666 | /* NOTREACHED */
|
---|
| 3667 | }
|
---|
| 3668 |
|
---|
| 3669 | static int doexit(struct op *t)
|
---|
| 3670 | {
|
---|
| 3671 | REGISTER char *cp;
|
---|
| 3672 |
|
---|
| 3673 | execflg = 0;
|
---|
| 3674 | if ((cp = t->words[1]) != NULL)
|
---|
| 3675 | setstatus(getn(cp));
|
---|
| 3676 |
|
---|
| 3677 | DBGPRINTF(("DOEXIT: calling leave(), t=%p\n", t));
|
---|
| 3678 |
|
---|
| 3679 | leave();
|
---|
| 3680 | /* NOTREACHED */
|
---|
| 3681 | return (0);
|
---|
| 3682 | }
|
---|
| 3683 |
|
---|
| 3684 | static int doexport(struct op *t)
|
---|
| 3685 | {
|
---|
| 3686 | rdexp(t->words + 1, export, EXPORT);
|
---|
| 3687 | return (0);
|
---|
| 3688 | }
|
---|
| 3689 |
|
---|
| 3690 | static int doreadonly(struct op *t)
|
---|
| 3691 | {
|
---|
| 3692 | rdexp(t->words + 1, ronly, RONLY);
|
---|
| 3693 | return (0);
|
---|
| 3694 | }
|
---|
| 3695 |
|
---|
| 3696 | static void rdexp(char **wp, void (*f) (struct var *), int key)
|
---|
| 3697 | {
|
---|
| 3698 | DBGPRINTF6(("RDEXP: enter, wp=%p, func=%p, key=%d\n", wp, f, key));
|
---|
| 3699 | DBGPRINTF6(("RDEXP: *wp=%s\n", *wp));
|
---|
| 3700 |
|
---|
| 3701 | if (*wp != NULL) {
|
---|
| 3702 | for (; *wp != NULL; wp++) {
|
---|
| 3703 | if (isassign(*wp)) {
|
---|
| 3704 | char *cp;
|
---|
| 3705 |
|
---|
| 3706 | assign(*wp, COPYV);
|
---|
| 3707 | for (cp = *wp; *cp != '='; cp++);
|
---|
| 3708 | *cp = '\0';
|
---|
| 3709 | }
|
---|
| 3710 | if (checkname(*wp))
|
---|
| 3711 | (*f) (lookup(*wp));
|
---|
| 3712 | else
|
---|
| 3713 | badid(*wp);
|
---|
| 3714 | }
|
---|
| 3715 | } else
|
---|
| 3716 | putvlist(key, 1);
|
---|
| 3717 | }
|
---|
| 3718 |
|
---|
| 3719 | static void badid(REGISTER char *s)
|
---|
| 3720 | {
|
---|
| 3721 | prs(s);
|
---|
| 3722 | err(": bad identifier");
|
---|
| 3723 | }
|
---|
| 3724 |
|
---|
| 3725 | static int doset(REGISTER struct op *t)
|
---|
| 3726 | {
|
---|
| 3727 | REGISTER struct var *vp;
|
---|
| 3728 | REGISTER char *cp;
|
---|
| 3729 | REGISTER int n;
|
---|
| 3730 |
|
---|
| 3731 | if ((cp = t->words[1]) == NULL) {
|
---|
| 3732 | for (vp = vlist; vp; vp = vp->next)
|
---|
| 3733 | varput(vp->name, 1);
|
---|
| 3734 | return (0);
|
---|
| 3735 | }
|
---|
| 3736 | if (*cp == '-') {
|
---|
| 3737 | /* bad: t->words++; */
|
---|
| 3738 | for (n = 0; (t->words[n] = t->words[n + 1]) != NULL; n++);
|
---|
| 3739 | if (*++cp == 0)
|
---|
| 3740 | flag['x'] = flag['v'] = 0;
|
---|
| 3741 | else
|
---|
| 3742 | for (; *cp; cp++)
|
---|
| 3743 | switch (*cp) {
|
---|
| 3744 | case 'e':
|
---|
| 3745 | if (!interactive)
|
---|
| 3746 | flag['e']++;
|
---|
| 3747 | break;
|
---|
| 3748 |
|
---|
| 3749 | default:
|
---|
| 3750 | if (*cp >= 'a' && *cp <= 'z')
|
---|
| 3751 | flag[(int) *cp]++;
|
---|
| 3752 | break;
|
---|
| 3753 | }
|
---|
| 3754 | setdash();
|
---|
| 3755 | }
|
---|
| 3756 | if (t->words[1]) {
|
---|
| 3757 | t->words[0] = dolv[0];
|
---|
| 3758 | for (n = 1; t->words[n]; n++)
|
---|
| 3759 | setarea((char *) t->words[n], 0);
|
---|
| 3760 | dolc = n - 1;
|
---|
| 3761 | dolv = t->words;
|
---|
| 3762 | setval(lookup("#"), putn(dolc));
|
---|
| 3763 | setarea((char *) (dolv - 1), 0);
|
---|
| 3764 | }
|
---|
| 3765 | return (0);
|
---|
| 3766 | }
|
---|
| 3767 |
|
---|
| 3768 | static void varput(REGISTER char *s, int out)
|
---|
| 3769 | {
|
---|
| 3770 | if (isalnum(*s) || *s == '_') {
|
---|
| 3771 | write(out, s, strlen(s));
|
---|
| 3772 | write(out, "\n", 1);
|
---|
| 3773 | }
|
---|
| 3774 | }
|
---|
| 3775 |
|
---|
| 3776 |
|
---|
| 3777 | /*
|
---|
| 3778 | * Copyright (c) 1999 Herbert Xu <herbert@debian.org>
|
---|
| 3779 | * This file contains code for the times builtin.
|
---|
| 3780 | */
|
---|
| 3781 | static int dotimes(struct op *t)
|
---|
| 3782 | {
|
---|
| 3783 | struct tms buf;
|
---|
| 3784 | long int clk_tck = sysconf(_SC_CLK_TCK);
|
---|
| 3785 |
|
---|
| 3786 | times(&buf);
|
---|
| 3787 | printf("%dm%fs %dm%fs\n%dm%fs %dm%fs\n",
|
---|
| 3788 | (int) (buf.tms_utime / clk_tck / 60),
|
---|
| 3789 | ((double) buf.tms_utime) / clk_tck,
|
---|
| 3790 | (int) (buf.tms_stime / clk_tck / 60),
|
---|
| 3791 | ((double) buf.tms_stime) / clk_tck,
|
---|
| 3792 | (int) (buf.tms_cutime / clk_tck / 60),
|
---|
| 3793 | ((double) buf.tms_cutime) / clk_tck,
|
---|
| 3794 | (int) (buf.tms_cstime / clk_tck / 60),
|
---|
| 3795 | ((double) buf.tms_cstime) / clk_tck);
|
---|
| 3796 | return 0;
|
---|
| 3797 | }
|
---|
| 3798 |
|
---|
| 3799 |
|
---|
| 3800 | static int (*inbuilt(char *s)) (struct op *) {
|
---|
| 3801 | const struct builtincmd *bp;
|
---|
| 3802 |
|
---|
| 3803 | for (bp = builtincmds; bp->name != NULL; bp++)
|
---|
| 3804 | if (strcmp(bp->name, s) == 0)
|
---|
| 3805 | return (bp->builtinfunc);
|
---|
| 3806 |
|
---|
| 3807 | return (NULL);
|
---|
| 3808 | }
|
---|
| 3809 |
|
---|
| 3810 | /* -------- eval.c -------- */
|
---|
| 3811 |
|
---|
| 3812 | /*
|
---|
| 3813 | * ${}
|
---|
| 3814 | * `command`
|
---|
| 3815 | * blank interpretation
|
---|
| 3816 | * quoting
|
---|
| 3817 | * glob
|
---|
| 3818 | */
|
---|
| 3819 |
|
---|
| 3820 | static char **eval(char **ap, int f)
|
---|
| 3821 | {
|
---|
| 3822 | struct wdblock *wb;
|
---|
| 3823 | char **wp;
|
---|
| 3824 | char **wf;
|
---|
| 3825 | jmp_buf ev;
|
---|
| 3826 |
|
---|
| 3827 | #if __GNUC__
|
---|
| 3828 | /* Avoid longjmp clobbering */
|
---|
| 3829 | (void) ℘
|
---|
| 3830 | (void) ≈
|
---|
| 3831 | #endif
|
---|
| 3832 |
|
---|
| 3833 | DBGPRINTF4(("EVAL: enter, f=%d\n", f));
|
---|
| 3834 |
|
---|
| 3835 | wp = NULL;
|
---|
| 3836 | wb = NULL;
|
---|
| 3837 | wf = NULL;
|
---|
| 3838 | if (newenv(setjmp(errpt = ev)) == 0) {
|
---|
| 3839 | while (*ap && isassign(*ap))
|
---|
| 3840 | expand(*ap++, &wb, f & ~DOGLOB);
|
---|
| 3841 | if (flag['k']) {
|
---|
| 3842 | for (wf = ap; *wf; wf++) {
|
---|
| 3843 | if (isassign(*wf))
|
---|
| 3844 | expand(*wf, &wb, f & ~DOGLOB);
|
---|
| 3845 | }
|
---|
| 3846 | }
|
---|
| 3847 | for (wb = addword((char *) 0, wb); *ap; ap++) {
|
---|
| 3848 | if (!flag['k'] || !isassign(*ap))
|
---|
| 3849 | expand(*ap, &wb, f & ~DOKEY);
|
---|
| 3850 | }
|
---|
| 3851 | wb = addword((char *) 0, wb);
|
---|
| 3852 | wp = getwords(wb);
|
---|
| 3853 | quitenv();
|
---|
| 3854 | } else
|
---|
| 3855 | gflg = 1;
|
---|
| 3856 |
|
---|
| 3857 | return (gflg ? (char **) NULL : wp);
|
---|
| 3858 | }
|
---|
| 3859 |
|
---|
| 3860 | /*
|
---|
| 3861 | * Make the exported environment from the exported
|
---|
| 3862 | * names in the dictionary. Keyword assignments
|
---|
| 3863 | * will already have been done.
|
---|
| 3864 | */
|
---|
| 3865 | static char **makenv(int all, struct wdblock *wb)
|
---|
| 3866 | {
|
---|
| 3867 | REGISTER struct var *vp;
|
---|
| 3868 |
|
---|
| 3869 | DBGPRINTF5(("MAKENV: enter, all=%d\n", all));
|
---|
| 3870 |
|
---|
| 3871 | for (vp = vlist; vp; vp = vp->next)
|
---|
| 3872 | if (all || vp->status & EXPORT)
|
---|
| 3873 | wb = addword(vp->name, wb);
|
---|
| 3874 | wb = addword((char *) 0, wb);
|
---|
| 3875 | return (getwords(wb));
|
---|
| 3876 | }
|
---|
| 3877 |
|
---|
| 3878 | static char *evalstr(REGISTER char *cp, int f)
|
---|
| 3879 | {
|
---|
| 3880 | struct wdblock *wb;
|
---|
| 3881 |
|
---|
| 3882 | DBGPRINTF6(("EVALSTR: enter, cp=%p, f=%d\n", cp, f));
|
---|
| 3883 |
|
---|
| 3884 | wb = NULL;
|
---|
| 3885 | if (expand(cp, &wb, f)) {
|
---|
| 3886 | if (wb == NULL || wb->w_nword == 0
|
---|
| 3887 | || (cp = wb->w_words[0]) == NULL)
|
---|
| 3888 | cp = "";
|
---|
| 3889 | DELETE(wb);
|
---|
| 3890 | } else
|
---|
| 3891 | cp = NULL;
|
---|
| 3892 | return (cp);
|
---|
| 3893 | }
|
---|
| 3894 |
|
---|
| 3895 | static int expand(char *cp, REGISTER struct wdblock **wbp, int f)
|
---|
| 3896 | {
|
---|
| 3897 | jmp_buf ev;
|
---|
| 3898 |
|
---|
| 3899 | #if __GNUC__
|
---|
| 3900 | /* Avoid longjmp clobbering */
|
---|
| 3901 | (void) &cp;
|
---|
| 3902 | #endif
|
---|
| 3903 |
|
---|
| 3904 | DBGPRINTF3(("EXPAND: enter, f=%d\n", f));
|
---|
| 3905 |
|
---|
| 3906 | gflg = 0;
|
---|
| 3907 |
|
---|
| 3908 | if (cp == NULL)
|
---|
| 3909 | return (0);
|
---|
| 3910 |
|
---|
| 3911 | if (!anys("$`'\"", cp) &&
|
---|
| 3912 | !anys(ifs->value, cp) && ((f & DOGLOB) == 0 || !anys("[*?", cp))) {
|
---|
| 3913 | cp = strsave(cp, areanum);
|
---|
| 3914 | if (f & DOTRIM)
|
---|
| 3915 | unquote(cp);
|
---|
| 3916 | *wbp = addword(cp, *wbp);
|
---|
| 3917 | return (1);
|
---|
| 3918 | }
|
---|
| 3919 | if (newenv(setjmp(errpt = ev)) == 0) {
|
---|
| 3920 | PUSHIO(aword, cp, strchar);
|
---|
| 3921 | e.iobase = e.iop;
|
---|
| 3922 | while ((cp = blank(f)) && gflg == 0) {
|
---|
| 3923 | e.linep = cp;
|
---|
| 3924 | cp = strsave(cp, areanum);
|
---|
| 3925 | if ((f & DOGLOB) == 0) {
|
---|
| 3926 | if (f & DOTRIM)
|
---|
| 3927 | unquote(cp);
|
---|
| 3928 | *wbp = addword(cp, *wbp);
|
---|
| 3929 | } else
|
---|
| 3930 | *wbp = glob(cp, *wbp);
|
---|
| 3931 | }
|
---|
| 3932 | quitenv();
|
---|
| 3933 | } else
|
---|
| 3934 | gflg = 1;
|
---|
| 3935 | return (gflg == 0);
|
---|
| 3936 | }
|
---|
| 3937 |
|
---|
| 3938 | /*
|
---|
| 3939 | * Blank interpretation and quoting
|
---|
| 3940 | */
|
---|
| 3941 | static char *blank(int f)
|
---|
| 3942 | {
|
---|
| 3943 | REGISTER int c, c1;
|
---|
| 3944 | REGISTER char *sp;
|
---|
| 3945 | int scanequals, foundequals;
|
---|
| 3946 |
|
---|
| 3947 | DBGPRINTF3(("BLANK: enter, f=%d\n", f));
|
---|
| 3948 |
|
---|
| 3949 | sp = e.linep;
|
---|
| 3950 | scanequals = f & DOKEY;
|
---|
| 3951 | foundequals = 0;
|
---|
| 3952 |
|
---|
| 3953 | loop:
|
---|
| 3954 | switch (c = subgetc('"', foundequals)) {
|
---|
| 3955 | case 0:
|
---|
| 3956 | if (sp == e.linep)
|
---|
| 3957 | return (0);
|
---|
| 3958 | *e.linep++ = 0;
|
---|
| 3959 | return (sp);
|
---|
| 3960 |
|
---|
| 3961 | default:
|
---|
| 3962 | if (f & DOBLANK && any(c, ifs->value))
|
---|
| 3963 | goto loop;
|
---|
| 3964 | break;
|
---|
| 3965 |
|
---|
| 3966 | case '"':
|
---|
| 3967 | case '\'':
|
---|
| 3968 | scanequals = 0;
|
---|
| 3969 | if (INSUB())
|
---|
| 3970 | break;
|
---|
| 3971 | for (c1 = c; (c = subgetc(c1, 1)) != c1;) {
|
---|
| 3972 | if (c == 0)
|
---|
| 3973 | break;
|
---|
| 3974 | if (c == '\'' || !any(c, "$`\""))
|
---|
| 3975 | c |= QUOTE;
|
---|
| 3976 | *e.linep++ = c;
|
---|
| 3977 | }
|
---|
| 3978 | c = 0;
|
---|
| 3979 | }
|
---|
| 3980 | unget(c);
|
---|
| 3981 | if (!isalpha(c) && c != '_')
|
---|
| 3982 | scanequals = 0;
|
---|
| 3983 | for (;;) {
|
---|
| 3984 | c = subgetc('"', foundequals);
|
---|
| 3985 | if (c == 0 ||
|
---|
| 3986 | f & (DOBLANK && any(c, ifs->value)) ||
|
---|
| 3987 | (!INSUB() && any(c, "\"'"))) {
|
---|
| 3988 | scanequals = 0;
|
---|
| 3989 | unget(c);
|
---|
| 3990 | if (any(c, "\"'"))
|
---|
| 3991 | goto loop;
|
---|
| 3992 | break;
|
---|
| 3993 | }
|
---|
| 3994 | if (scanequals) {
|
---|
| 3995 | if (c == '=') {
|
---|
| 3996 | foundequals = 1;
|
---|
| 3997 | scanequals = 0;
|
---|
| 3998 | } else if (!isalnum(c) && c != '_')
|
---|
| 3999 | scanequals = 0;
|
---|
| 4000 | }
|
---|
| 4001 | *e.linep++ = c;
|
---|
| 4002 | }
|
---|
| 4003 | *e.linep++ = 0;
|
---|
| 4004 | return (sp);
|
---|
| 4005 | }
|
---|
| 4006 |
|
---|
| 4007 | /*
|
---|
| 4008 | * Get characters, substituting for ` and $
|
---|
| 4009 | */
|
---|
| 4010 | static int subgetc(REGISTER char ec, int quoted)
|
---|
| 4011 | {
|
---|
| 4012 | REGISTER char c;
|
---|
| 4013 |
|
---|
| 4014 | DBGPRINTF3(("SUBGETC: enter, quoted=%d\n", quoted));
|
---|
| 4015 |
|
---|
| 4016 | again:
|
---|
| 4017 | c = my_getc(ec);
|
---|
| 4018 | if (!INSUB() && ec != '\'') {
|
---|
| 4019 | if (c == '`') {
|
---|
| 4020 | if (grave(quoted) == 0)
|
---|
| 4021 | return (0);
|
---|
| 4022 | e.iop->task = XGRAVE;
|
---|
| 4023 | goto again;
|
---|
| 4024 | }
|
---|
| 4025 | if (c == '$' && (c = dollar(quoted)) == 0) {
|
---|
| 4026 | e.iop->task = XDOLL;
|
---|
| 4027 | goto again;
|
---|
| 4028 | }
|
---|
| 4029 | }
|
---|
| 4030 | return (c);
|
---|
| 4031 | }
|
---|
| 4032 |
|
---|
| 4033 | /*
|
---|
| 4034 | * Prepare to generate the string returned by ${} substitution.
|
---|
| 4035 | */
|
---|
| 4036 | static int dollar(int quoted)
|
---|
| 4037 | {
|
---|
| 4038 | int otask;
|
---|
| 4039 | struct io *oiop;
|
---|
| 4040 | char *dolp;
|
---|
| 4041 | REGISTER char *s, c, *cp = NULL;
|
---|
| 4042 | struct var *vp;
|
---|
| 4043 |
|
---|
| 4044 | DBGPRINTF3(("DOLLAR: enter, quoted=%d\n", quoted));
|
---|
| 4045 |
|
---|
| 4046 | c = readc();
|
---|
| 4047 | s = e.linep;
|
---|
| 4048 | if (c != '{') {
|
---|
| 4049 | *e.linep++ = c;
|
---|
| 4050 | if (isalpha(c) || c == '_') {
|
---|
| 4051 | while ((c = readc()) != 0 && (isalnum(c) || c == '_'))
|
---|
| 4052 | if (e.linep < elinep)
|
---|
| 4053 | *e.linep++ = c;
|
---|
| 4054 | unget(c);
|
---|
| 4055 | }
|
---|
| 4056 | c = 0;
|
---|
| 4057 | } else {
|
---|
| 4058 | oiop = e.iop;
|
---|
| 4059 | otask = e.iop->task;
|
---|
| 4060 |
|
---|
| 4061 | e.iop->task = XOTHER;
|
---|
| 4062 | while ((c = subgetc('"', 0)) != 0 && c != '}' && c != '\n')
|
---|
| 4063 | if (e.linep < elinep)
|
---|
| 4064 | *e.linep++ = c;
|
---|
| 4065 | if (oiop == e.iop)
|
---|
| 4066 | e.iop->task = otask;
|
---|
| 4067 | if (c != '}') {
|
---|
| 4068 | err("unclosed ${");
|
---|
| 4069 | gflg++;
|
---|
| 4070 | return (c);
|
---|
| 4071 | }
|
---|
| 4072 | }
|
---|
| 4073 | if (e.linep >= elinep) {
|
---|
| 4074 | err("string in ${} too long");
|
---|
| 4075 | gflg++;
|
---|
| 4076 | e.linep -= 10;
|
---|
| 4077 | }
|
---|
| 4078 | *e.linep = 0;
|
---|
| 4079 | if (*s)
|
---|
| 4080 | for (cp = s + 1; *cp; cp++)
|
---|
| 4081 | if (any(*cp, "=-+?")) {
|
---|
| 4082 | c = *cp;
|
---|
| 4083 | *cp++ = 0;
|
---|
| 4084 | break;
|
---|
| 4085 | }
|
---|
| 4086 | if (s[1] == 0 && (*s == '*' || *s == '@')) {
|
---|
| 4087 | if (dolc > 1) {
|
---|
| 4088 | /* currently this does not distinguish $* and $@ */
|
---|
| 4089 | /* should check dollar */
|
---|
| 4090 | e.linep = s;
|
---|
| 4091 | PUSHIO(awordlist, dolv + 1, dolchar);
|
---|
| 4092 | return (0);
|
---|
| 4093 | } else { /* trap the nasty ${=} */
|
---|
| 4094 | s[0] = '1';
|
---|
| 4095 | s[1] = 0;
|
---|
| 4096 | }
|
---|
| 4097 | }
|
---|
| 4098 | vp = lookup(s);
|
---|
| 4099 | if ((dolp = vp->value) == null) {
|
---|
| 4100 | switch (c) {
|
---|
| 4101 | case '=':
|
---|
| 4102 | if (isdigit(*s)) {
|
---|
| 4103 | err("cannot use ${...=...} with $n");
|
---|
| 4104 | gflg++;
|
---|
| 4105 | break;
|
---|
| 4106 | }
|
---|
| 4107 | setval(vp, cp);
|
---|
| 4108 | dolp = vp->value;
|
---|
| 4109 | break;
|
---|
| 4110 |
|
---|
| 4111 | case '-':
|
---|
| 4112 | dolp = strsave(cp, areanum);
|
---|
| 4113 | break;
|
---|
| 4114 |
|
---|
| 4115 | case '?':
|
---|
| 4116 | if (*cp == 0) {
|
---|
| 4117 | prs("missing value for ");
|
---|
| 4118 | err(s);
|
---|
| 4119 | } else
|
---|
| 4120 | err(cp);
|
---|
| 4121 | gflg++;
|
---|
| 4122 | break;
|
---|
| 4123 | }
|
---|
| 4124 | } else if (c == '+')
|
---|
| 4125 | dolp = strsave(cp, areanum);
|
---|
| 4126 | if (flag['u'] && dolp == null) {
|
---|
| 4127 | prs("unset variable: ");
|
---|
| 4128 | err(s);
|
---|
| 4129 | gflg++;
|
---|
| 4130 | }
|
---|
| 4131 | e.linep = s;
|
---|
| 4132 | PUSHIO(aword, dolp, quoted ? qstrchar : strchar);
|
---|
| 4133 | return (0);
|
---|
| 4134 | }
|
---|
| 4135 |
|
---|
| 4136 | /*
|
---|
| 4137 | * Run the command in `...` and read its output.
|
---|
| 4138 | */
|
---|
| 4139 |
|
---|
| 4140 | static int grave(int quoted)
|
---|
| 4141 | {
|
---|
| 4142 | char *cp;
|
---|
| 4143 | REGISTER int i;
|
---|
| 4144 | int j;
|
---|
| 4145 | int pf[2];
|
---|
| 4146 | static char child_cmd[LINELIM];
|
---|
| 4147 | char *src;
|
---|
| 4148 | char *dest;
|
---|
| 4149 | int count;
|
---|
| 4150 | int ignore;
|
---|
| 4151 | int ignore_once;
|
---|
| 4152 | char *argument_list[4];
|
---|
| 4153 | struct wdblock *wb = NULL;
|
---|
| 4154 |
|
---|
| 4155 | #if __GNUC__
|
---|
| 4156 | /* Avoid longjmp clobbering */
|
---|
| 4157 | (void) &cp;
|
---|
| 4158 | #endif
|
---|
| 4159 |
|
---|
| 4160 | for (cp = e.iop->argp->aword; *cp != '`'; cp++)
|
---|
| 4161 | if (*cp == 0) {
|
---|
| 4162 | err("no closing `");
|
---|
| 4163 | return (0);
|
---|
| 4164 | }
|
---|
| 4165 |
|
---|
| 4166 | /* string copy with dollar expansion */
|
---|
| 4167 | src = e.iop->argp->aword;
|
---|
| 4168 | dest = child_cmd;
|
---|
| 4169 | count = 0;
|
---|
| 4170 | ignore = 0;
|
---|
| 4171 | ignore_once = 0;
|
---|
| 4172 | while ((*src != '`') && (count < LINELIM)) {
|
---|
| 4173 | if (*src == '\'')
|
---|
| 4174 | ignore = !ignore;
|
---|
| 4175 | if (*src == '\\')
|
---|
| 4176 | ignore_once = 1;
|
---|
| 4177 | if (*src == '$' && !ignore && !ignore_once) {
|
---|
| 4178 | struct var *vp;
|
---|
| 4179 | char var_name[LINELIM];
|
---|
| 4180 | char alt_value[LINELIM];
|
---|
| 4181 | int var_index = 0;
|
---|
| 4182 | int alt_index = 0;
|
---|
| 4183 | char operator = 0;
|
---|
| 4184 | int braces = 0;
|
---|
| 4185 | char *value;
|
---|
| 4186 |
|
---|
| 4187 | src++;
|
---|
| 4188 | if (*src == '{') {
|
---|
| 4189 | braces = 1;
|
---|
| 4190 | src++;
|
---|
| 4191 | }
|
---|
| 4192 |
|
---|
| 4193 | var_name[var_index++] = *src++;
|
---|
| 4194 | while (isalnum(*src) || *src=='_')
|
---|
| 4195 | var_name[var_index++] = *src++;
|
---|
| 4196 | var_name[var_index] = 0;
|
---|
| 4197 |
|
---|
| 4198 | if (braces) {
|
---|
| 4199 | switch (*src) {
|
---|
| 4200 | case '}':
|
---|
| 4201 | break;
|
---|
| 4202 | case '-':
|
---|
| 4203 | case '=':
|
---|
| 4204 | case '+':
|
---|
| 4205 | case '?':
|
---|
| 4206 | operator = * src;
|
---|
| 4207 | break;
|
---|
| 4208 | default:
|
---|
| 4209 | err("unclosed ${\n");
|
---|
| 4210 | return (0);
|
---|
| 4211 | }
|
---|
| 4212 | if (operator) {
|
---|
| 4213 | src++;
|
---|
| 4214 | while (*src && (*src != '}')) {
|
---|
| 4215 | alt_value[alt_index++] = *src++;
|
---|
| 4216 | }
|
---|
| 4217 | alt_value[alt_index] = 0;
|
---|
| 4218 | if (*src != '}') {
|
---|
| 4219 | err("unclosed ${\n");
|
---|
| 4220 | return (0);
|
---|
| 4221 | }
|
---|
| 4222 | }
|
---|
| 4223 | src++;
|
---|
| 4224 | }
|
---|
| 4225 |
|
---|
| 4226 | if (isalpha(*var_name)) {
|
---|
| 4227 | /* let subshell handle it instead */
|
---|
| 4228 |
|
---|
| 4229 | char *namep = var_name;
|
---|
| 4230 |
|
---|
| 4231 | *dest++ = '$';
|
---|
| 4232 | if (braces)
|
---|
| 4233 | *dest++ = '{';
|
---|
| 4234 | while (*namep)
|
---|
| 4235 | *dest++ = *namep++;
|
---|
| 4236 | if (operator) {
|
---|
| 4237 | char *altp = alt_value;
|
---|
| 4238 | *dest++ = operator;
|
---|
| 4239 | while (*altp)
|
---|
| 4240 | *dest++ = *altp++;
|
---|
| 4241 | }
|
---|
| 4242 | if (braces)
|
---|
| 4243 | *dest++ = '}';
|
---|
| 4244 |
|
---|
| 4245 | wb = addword(lookup(var_name)->name, wb);
|
---|
| 4246 | } else {
|
---|
| 4247 | /* expand */
|
---|
| 4248 |
|
---|
| 4249 | vp = lookup(var_name);
|
---|
| 4250 | if (vp->value != null)
|
---|
| 4251 | value = (operator == '+') ?
|
---|
| 4252 | alt_value : vp->value;
|
---|
| 4253 | else if (operator == '?') {
|
---|
| 4254 | err(alt_value);
|
---|
| 4255 | return (0);
|
---|
| 4256 | } else if (alt_index && (operator != '+')) {
|
---|
| 4257 | value = alt_value;
|
---|
| 4258 | if (operator == '=')
|
---|
| 4259 | setval(vp, value);
|
---|
| 4260 | } else
|
---|
| 4261 | continue;
|
---|
| 4262 |
|
---|
| 4263 | while (*value && (count < LINELIM)) {
|
---|
| 4264 | *dest++ = *value++;
|
---|
| 4265 | count++;
|
---|
| 4266 | }
|
---|
| 4267 | }
|
---|
| 4268 | } else {
|
---|
| 4269 | *dest++ = *src++;
|
---|
| 4270 | count++;
|
---|
| 4271 | ignore_once = 0;
|
---|
| 4272 | }
|
---|
| 4273 | }
|
---|
| 4274 | *dest = '\0';
|
---|
| 4275 |
|
---|
| 4276 | if (openpipe(pf) < 0)
|
---|
| 4277 | return (0);
|
---|
| 4278 |
|
---|
| 4279 | while ((i = vfork()) == -1 && errno == EAGAIN);
|
---|
| 4280 |
|
---|
| 4281 | DBGPRINTF3(("GRAVE: i is %p\n", io));
|
---|
| 4282 |
|
---|
| 4283 | if (i < 0) {
|
---|
| 4284 | closepipe(pf);
|
---|
| 4285 | err((char *) bb_msg_memory_exhausted);
|
---|
| 4286 | return (0);
|
---|
| 4287 | }
|
---|
| 4288 | if (i != 0) {
|
---|
| 4289 | waitpid(i, NULL, 0);
|
---|
| 4290 | e.iop->argp->aword = ++cp;
|
---|
| 4291 | close(pf[1]);
|
---|
| 4292 | PUSHIO(afile, remap(pf[0]),
|
---|
| 4293 | (int (*)(struct ioarg *)) ((quoted) ? qgravechar :
|
---|
| 4294 | gravechar));
|
---|
| 4295 | return (1);
|
---|
| 4296 | }
|
---|
| 4297 | /* allow trapped signals */
|
---|
| 4298 | /* XXX - Maybe this signal stuff should go as well? */
|
---|
| 4299 | for (j = 0; j <= _NSIG; j++)
|
---|
| 4300 | if (ourtrap[j] && signal(j, SIG_IGN) != SIG_IGN)
|
---|
| 4301 | signal(j, SIG_DFL);
|
---|
| 4302 |
|
---|
| 4303 | dup2(pf[1], 1);
|
---|
| 4304 | closepipe(pf);
|
---|
| 4305 |
|
---|
| 4306 | argument_list[0] = (char *) DEFAULT_SHELL;
|
---|
| 4307 | argument_list[1] = "-c";
|
---|
| 4308 | argument_list[2] = child_cmd;
|
---|
| 4309 | argument_list[3] = 0;
|
---|
| 4310 |
|
---|
| 4311 | cp = rexecve(argument_list[0], argument_list, makenv(1, wb));
|
---|
| 4312 | prs(argument_list[0]);
|
---|
| 4313 | prs(": ");
|
---|
| 4314 | err(cp);
|
---|
| 4315 | _exit(1);
|
---|
| 4316 | }
|
---|
| 4317 |
|
---|
| 4318 |
|
---|
| 4319 | static char *unquote(REGISTER char *as)
|
---|
| 4320 | {
|
---|
| 4321 | REGISTER char *s;
|
---|
| 4322 |
|
---|
| 4323 | if ((s = as) != NULL)
|
---|
| 4324 | while (*s)
|
---|
| 4325 | *s++ &= ~QUOTE;
|
---|
| 4326 | return (as);
|
---|
| 4327 | }
|
---|
| 4328 |
|
---|
| 4329 | /* -------- glob.c -------- */
|
---|
| 4330 |
|
---|
| 4331 | /*
|
---|
| 4332 | * glob
|
---|
| 4333 | */
|
---|
| 4334 |
|
---|
| 4335 | #define scopy(x) strsave((x), areanum)
|
---|
| 4336 | #define BLKSIZ 512
|
---|
| 4337 | #define NDENT ((BLKSIZ+sizeof(struct dirent)-1)/sizeof(struct dirent))
|
---|
| 4338 |
|
---|
| 4339 | static struct wdblock *cl, *nl;
|
---|
| 4340 | static char spcl[] = "[?*";
|
---|
| 4341 |
|
---|
| 4342 | static struct wdblock *glob(char *cp, struct wdblock *wb)
|
---|
| 4343 | {
|
---|
| 4344 | REGISTER int i;
|
---|
| 4345 | REGISTER char *pp;
|
---|
| 4346 |
|
---|
| 4347 | if (cp == 0)
|
---|
| 4348 | return (wb);
|
---|
| 4349 | i = 0;
|
---|
| 4350 | for (pp = cp; *pp; pp++)
|
---|
| 4351 | if (any(*pp, spcl))
|
---|
| 4352 | i++;
|
---|
| 4353 | else if (!any(*pp & ~QUOTE, spcl))
|
---|
| 4354 | *pp &= ~QUOTE;
|
---|
| 4355 | if (i != 0) {
|
---|
| 4356 | for (cl = addword(scopy(cp), (struct wdblock *) 0); anyspcl(cl);
|
---|
| 4357 | cl = nl) {
|
---|
| 4358 | nl = newword(cl->w_nword * 2);
|
---|
| 4359 | for (i = 0; i < cl->w_nword; i++) { /* for each argument */
|
---|
| 4360 | for (pp = cl->w_words[i]; *pp; pp++)
|
---|
| 4361 | if (any(*pp, spcl)) {
|
---|
| 4362 | globname(cl->w_words[i], pp);
|
---|
| 4363 | break;
|
---|
| 4364 | }
|
---|
| 4365 | if (*pp == '\0')
|
---|
| 4366 | nl = addword(scopy(cl->w_words[i]), nl);
|
---|
| 4367 | }
|
---|
| 4368 | for (i = 0; i < cl->w_nword; i++)
|
---|
| 4369 | DELETE(cl->w_words[i]);
|
---|
| 4370 | DELETE(cl);
|
---|
| 4371 | }
|
---|
| 4372 | for (i = 0; i < cl->w_nword; i++)
|
---|
| 4373 | unquote(cl->w_words[i]);
|
---|
| 4374 | glob0((char *) cl->w_words, cl->w_nword, sizeof(char *), xstrcmp);
|
---|
| 4375 | if (cl->w_nword) {
|
---|
| 4376 | for (i = 0; i < cl->w_nword; i++)
|
---|
| 4377 | wb = addword(cl->w_words[i], wb);
|
---|
| 4378 | DELETE(cl);
|
---|
| 4379 | return (wb);
|
---|
| 4380 | }
|
---|
| 4381 | }
|
---|
| 4382 | wb = addword(unquote(cp), wb);
|
---|
| 4383 | return (wb);
|
---|
| 4384 | }
|
---|
| 4385 |
|
---|
| 4386 | static void globname(char *we, REGISTER char *pp)
|
---|
| 4387 | {
|
---|
| 4388 | REGISTER char *np, *cp;
|
---|
| 4389 | char *name, *gp, *dp;
|
---|
| 4390 | int k;
|
---|
| 4391 | DIR *dirp;
|
---|
| 4392 | struct dirent *de;
|
---|
| 4393 | char dname[NAME_MAX + 1];
|
---|
| 4394 | struct stat dbuf;
|
---|
| 4395 |
|
---|
| 4396 | for (np = we; np != pp; pp--)
|
---|
| 4397 | if (pp[-1] == '/')
|
---|
| 4398 | break;
|
---|
| 4399 | for (dp = cp = space((int) (pp - np) + 3); np < pp;)
|
---|
| 4400 | *cp++ = *np++;
|
---|
| 4401 | *cp++ = '.';
|
---|
| 4402 | *cp = '\0';
|
---|
| 4403 | for (gp = cp = space(strlen(pp) + 1); *np && *np != '/';)
|
---|
| 4404 | *cp++ = *np++;
|
---|
| 4405 | *cp = '\0';
|
---|
| 4406 | dirp = opendir(dp);
|
---|
| 4407 | if (dirp == 0) {
|
---|
| 4408 | DELETE(dp);
|
---|
| 4409 | DELETE(gp);
|
---|
| 4410 | return;
|
---|
| 4411 | }
|
---|
| 4412 | dname[NAME_MAX] = '\0';
|
---|
| 4413 | while ((de = readdir(dirp)) != NULL) {
|
---|
| 4414 | /* XXX Hmmm... What this could be? (abial) */
|
---|
| 4415 | /*
|
---|
| 4416 | if (ent[j].d_ino == 0)
|
---|
| 4417 | continue;
|
---|
| 4418 | */
|
---|
| 4419 | strncpy(dname, de->d_name, NAME_MAX);
|
---|
| 4420 | if (dname[0] == '.')
|
---|
| 4421 | if (*gp != '.')
|
---|
| 4422 | continue;
|
---|
| 4423 | for (k = 0; k < NAME_MAX; k++)
|
---|
| 4424 | if (any(dname[k], spcl))
|
---|
| 4425 | dname[k] |= QUOTE;
|
---|
| 4426 | if (gmatch(dname, gp)) {
|
---|
| 4427 | name = generate(we, pp, dname, np);
|
---|
| 4428 | if (*np && !anys(np, spcl)) {
|
---|
| 4429 | if (stat(name, &dbuf)) {
|
---|
| 4430 | DELETE(name);
|
---|
| 4431 | continue;
|
---|
| 4432 | }
|
---|
| 4433 | }
|
---|
| 4434 | nl = addword(name, nl);
|
---|
| 4435 | }
|
---|
| 4436 | }
|
---|
| 4437 | closedir(dirp);
|
---|
| 4438 | DELETE(dp);
|
---|
| 4439 | DELETE(gp);
|
---|
| 4440 | }
|
---|
| 4441 |
|
---|
| 4442 | /*
|
---|
| 4443 | * generate a pathname as below.
|
---|
| 4444 | * start..end1 / middle end
|
---|
| 4445 | * the slashes come for free
|
---|
| 4446 | */
|
---|
| 4447 | static char *generate(char *start1, REGISTER char *end1, char *middle, char *end)
|
---|
| 4448 | {
|
---|
| 4449 | char *p;
|
---|
| 4450 | REGISTER char *op, *xp;
|
---|
| 4451 |
|
---|
| 4452 | p = op =
|
---|
| 4453 | space((int) (end1 - start1) + strlen(middle) + strlen(end) + 2);
|
---|
| 4454 | for (xp = start1; xp != end1;)
|
---|
| 4455 | *op++ = *xp++;
|
---|
| 4456 | for (xp = middle; (*op++ = *xp++) != '\0';);
|
---|
| 4457 | op--;
|
---|
| 4458 | for (xp = end; (*op++ = *xp++) != '\0';);
|
---|
| 4459 | return (p);
|
---|
| 4460 | }
|
---|
| 4461 |
|
---|
| 4462 | static int anyspcl(REGISTER struct wdblock *wb)
|
---|
| 4463 | {
|
---|
| 4464 | REGISTER int i;
|
---|
| 4465 | REGISTER char **wd;
|
---|
| 4466 |
|
---|
| 4467 | wd = wb->w_words;
|
---|
| 4468 | for (i = 0; i < wb->w_nword; i++)
|
---|
| 4469 | if (anys(spcl, *wd++))
|
---|
| 4470 | return (1);
|
---|
| 4471 | return (0);
|
---|
| 4472 | }
|
---|
| 4473 |
|
---|
| 4474 | static int xstrcmp(char *p1, char *p2)
|
---|
| 4475 | {
|
---|
| 4476 | return (strcmp(*(char **) p1, *(char **) p2));
|
---|
| 4477 | }
|
---|
| 4478 |
|
---|
| 4479 | /* -------- word.c -------- */
|
---|
| 4480 |
|
---|
| 4481 | static struct wdblock *newword(REGISTER int nw)
|
---|
| 4482 | {
|
---|
| 4483 | REGISTER struct wdblock *wb;
|
---|
| 4484 |
|
---|
| 4485 | wb = (struct wdblock *) space(sizeof(*wb) + nw * sizeof(char *));
|
---|
| 4486 | wb->w_bsize = nw;
|
---|
| 4487 | wb->w_nword = 0;
|
---|
| 4488 | return (wb);
|
---|
| 4489 | }
|
---|
| 4490 |
|
---|
| 4491 | static struct wdblock *addword(char *wd, REGISTER struct wdblock *wb)
|
---|
| 4492 | {
|
---|
| 4493 | REGISTER struct wdblock *wb2;
|
---|
| 4494 | REGISTER int nw;
|
---|
| 4495 |
|
---|
| 4496 | if (wb == NULL)
|
---|
| 4497 | wb = newword(NSTART);
|
---|
| 4498 | if ((nw = wb->w_nword) >= wb->w_bsize) {
|
---|
| 4499 | wb2 = newword(nw * 2);
|
---|
| 4500 | memcpy((char *) wb2->w_words, (char *) wb->w_words,
|
---|
| 4501 | nw * sizeof(char *));
|
---|
| 4502 | wb2->w_nword = nw;
|
---|
| 4503 | DELETE(wb);
|
---|
| 4504 | wb = wb2;
|
---|
| 4505 | }
|
---|
| 4506 | wb->w_words[wb->w_nword++] = wd;
|
---|
| 4507 | return (wb);
|
---|
| 4508 | }
|
---|
| 4509 |
|
---|
| 4510 | static
|
---|
| 4511 | char **getwords(REGISTER struct wdblock *wb)
|
---|
| 4512 | {
|
---|
| 4513 | REGISTER char **wd;
|
---|
| 4514 | REGISTER int nb;
|
---|
| 4515 |
|
---|
| 4516 | if (wb == NULL)
|
---|
| 4517 | return ((char **) NULL);
|
---|
| 4518 | if (wb->w_nword == 0) {
|
---|
| 4519 | DELETE(wb);
|
---|
| 4520 | return ((char **) NULL);
|
---|
| 4521 | }
|
---|
| 4522 | wd = (char **) space(nb = sizeof(*wd) * wb->w_nword);
|
---|
| 4523 | memcpy((char *) wd, (char *) wb->w_words, nb);
|
---|
| 4524 | DELETE(wb); /* perhaps should done by caller */
|
---|
| 4525 | return (wd);
|
---|
| 4526 | }
|
---|
| 4527 |
|
---|
| 4528 | static int (*func) (char *, char *);
|
---|
| 4529 | static int globv;
|
---|
| 4530 |
|
---|
| 4531 | static void glob0(char *a0, unsigned a1, int a2, int (*a3) (char *, char *))
|
---|
| 4532 | {
|
---|
| 4533 | func = a3;
|
---|
| 4534 | globv = a2;
|
---|
| 4535 | glob1(a0, a0 + a1 * a2);
|
---|
| 4536 | }
|
---|
| 4537 |
|
---|
| 4538 | static void glob1(char *base, char *lim)
|
---|
| 4539 | {
|
---|
| 4540 | REGISTER char *i, *j;
|
---|
| 4541 | int v2;
|
---|
| 4542 | char *lptr, *hptr;
|
---|
| 4543 | int c;
|
---|
| 4544 | unsigned n;
|
---|
| 4545 |
|
---|
| 4546 |
|
---|
| 4547 | v2 = globv;
|
---|
| 4548 |
|
---|
| 4549 | top:
|
---|
| 4550 | if ((n = (int) (lim - base)) <= v2)
|
---|
| 4551 | return;
|
---|
| 4552 | n = v2 * (n / (2 * v2));
|
---|
| 4553 | hptr = lptr = base + n;
|
---|
| 4554 | i = base;
|
---|
| 4555 | j = lim - v2;
|
---|
| 4556 | for (;;) {
|
---|
| 4557 | if (i < lptr) {
|
---|
| 4558 | if ((c = (*func) (i, lptr)) == 0) {
|
---|
| 4559 | glob2(i, lptr -= v2);
|
---|
| 4560 | continue;
|
---|
| 4561 | }
|
---|
| 4562 | if (c < 0) {
|
---|
| 4563 | i += v2;
|
---|
| 4564 | continue;
|
---|
| 4565 | }
|
---|
| 4566 | }
|
---|
| 4567 |
|
---|
| 4568 | begin:
|
---|
| 4569 | if (j > hptr) {
|
---|
| 4570 | if ((c = (*func) (hptr, j)) == 0) {
|
---|
| 4571 | glob2(hptr += v2, j);
|
---|
| 4572 | goto begin;
|
---|
| 4573 | }
|
---|
| 4574 | if (c > 0) {
|
---|
| 4575 | if (i == lptr) {
|
---|
| 4576 | glob3(i, hptr += v2, j);
|
---|
| 4577 | i = lptr += v2;
|
---|
| 4578 | goto begin;
|
---|
| 4579 | }
|
---|
| 4580 | glob2(i, j);
|
---|
| 4581 | j -= v2;
|
---|
| 4582 | i += v2;
|
---|
| 4583 | continue;
|
---|
| 4584 | }
|
---|
| 4585 | j -= v2;
|
---|
| 4586 | goto begin;
|
---|
| 4587 | }
|
---|
| 4588 |
|
---|
| 4589 |
|
---|
| 4590 | if (i == lptr) {
|
---|
| 4591 | if (lptr - base >= lim - hptr) {
|
---|
| 4592 | glob1(hptr + v2, lim);
|
---|
| 4593 | lim = lptr;
|
---|
| 4594 | } else {
|
---|
| 4595 | glob1(base, lptr);
|
---|
| 4596 | base = hptr + v2;
|
---|
| 4597 | }
|
---|
| 4598 | goto top;
|
---|
| 4599 | }
|
---|
| 4600 |
|
---|
| 4601 |
|
---|
| 4602 | glob3(j, lptr -= v2, i);
|
---|
| 4603 | j = hptr -= v2;
|
---|
| 4604 | }
|
---|
| 4605 | }
|
---|
| 4606 |
|
---|
| 4607 | static void glob2(char *i, char *j)
|
---|
| 4608 | {
|
---|
| 4609 | REGISTER char *index1, *index2, c;
|
---|
| 4610 | int m;
|
---|
| 4611 |
|
---|
| 4612 | m = globv;
|
---|
| 4613 | index1 = i;
|
---|
| 4614 | index2 = j;
|
---|
| 4615 | do {
|
---|
| 4616 | c = *index1;
|
---|
| 4617 | *index1++ = *index2;
|
---|
| 4618 | *index2++ = c;
|
---|
| 4619 | } while (--m);
|
---|
| 4620 | }
|
---|
| 4621 |
|
---|
| 4622 | static void glob3(char *i, char *j, char *k)
|
---|
| 4623 | {
|
---|
| 4624 | REGISTER char *index1, *index2, *index3;
|
---|
| 4625 | int c;
|
---|
| 4626 | int m;
|
---|
| 4627 |
|
---|
| 4628 | m = globv;
|
---|
| 4629 | index1 = i;
|
---|
| 4630 | index2 = j;
|
---|
| 4631 | index3 = k;
|
---|
| 4632 | do {
|
---|
| 4633 | c = *index1;
|
---|
| 4634 | *index1++ = *index3;
|
---|
| 4635 | *index3++ = *index2;
|
---|
| 4636 | *index2++ = c;
|
---|
| 4637 | } while (--m);
|
---|
| 4638 | }
|
---|
| 4639 |
|
---|
| 4640 | /* -------- io.c -------- */
|
---|
| 4641 |
|
---|
| 4642 | /*
|
---|
| 4643 | * shell IO
|
---|
| 4644 | */
|
---|
| 4645 |
|
---|
| 4646 | static int my_getc(int ec)
|
---|
| 4647 | {
|
---|
| 4648 | REGISTER int c;
|
---|
| 4649 |
|
---|
| 4650 | if (e.linep > elinep) {
|
---|
| 4651 | while ((c = readc()) != '\n' && c);
|
---|
| 4652 | err("input line too long");
|
---|
| 4653 | gflg++;
|
---|
| 4654 | return (c);
|
---|
| 4655 | }
|
---|
| 4656 | c = readc();
|
---|
| 4657 | if ((ec != '\'') && (ec != '`') && (e.iop->task != XGRAVE)) {
|
---|
| 4658 | if (c == '\\') {
|
---|
| 4659 | c = readc();
|
---|
| 4660 | if (c == '\n' && ec != '\"')
|
---|
| 4661 | return (my_getc(ec));
|
---|
| 4662 | c |= QUOTE;
|
---|
| 4663 | }
|
---|
| 4664 | }
|
---|
| 4665 | return (c);
|
---|
| 4666 | }
|
---|
| 4667 |
|
---|
| 4668 | static void unget(int c)
|
---|
| 4669 | {
|
---|
| 4670 | if (e.iop >= e.iobase)
|
---|
| 4671 | e.iop->peekc = c;
|
---|
| 4672 | }
|
---|
| 4673 |
|
---|
| 4674 | static int eofc(void)
|
---|
| 4675 | {
|
---|
| 4676 | return e.iop < e.iobase || (e.iop->peekc == 0 && e.iop->prev == 0);
|
---|
| 4677 | }
|
---|
| 4678 |
|
---|
| 4679 | static int readc(void)
|
---|
| 4680 | {
|
---|
| 4681 | REGISTER int c;
|
---|
| 4682 |
|
---|
| 4683 | RCPRINTF(("READC: e.iop %p, e.iobase %p\n", e.iop, e.iobase));
|
---|
| 4684 |
|
---|
| 4685 | for (; e.iop >= e.iobase; e.iop--) {
|
---|
| 4686 | RCPRINTF(("READC: e.iop %p, peekc 0x%x\n", e.iop, e.iop->peekc));
|
---|
| 4687 | if ((c = e.iop->peekc) != '\0') {
|
---|
| 4688 | e.iop->peekc = 0;
|
---|
| 4689 | return (c);
|
---|
| 4690 | } else {
|
---|
| 4691 | if (e.iop->prev != 0) {
|
---|
| 4692 | if ((c = (*e.iop->iofn) (e.iop->argp, e.iop)) != '\0') {
|
---|
| 4693 | if (c == -1) {
|
---|
| 4694 | e.iop++;
|
---|
| 4695 | continue;
|
---|
| 4696 | }
|
---|
| 4697 | if (e.iop == iostack)
|
---|
| 4698 | ioecho(c);
|
---|
| 4699 | return (e.iop->prev = c);
|
---|
| 4700 | } else if (e.iop->task == XIO && e.iop->prev != '\n') {
|
---|
| 4701 | e.iop->prev = 0;
|
---|
| 4702 | if (e.iop == iostack)
|
---|
| 4703 | ioecho('\n');
|
---|
| 4704 | return '\n';
|
---|
| 4705 | }
|
---|
| 4706 | }
|
---|
| 4707 | if (e.iop->task == XIO) {
|
---|
| 4708 | if (multiline) {
|
---|
| 4709 | return e.iop->prev = 0;
|
---|
| 4710 | }
|
---|
| 4711 | if (interactive && e.iop == iostack + 1) {
|
---|
| 4712 | #ifdef CONFIG_FEATURE_COMMAND_EDITING
|
---|
| 4713 | current_prompt = prompt->value;
|
---|
| 4714 | #else
|
---|
| 4715 | prs(prompt->value);
|
---|
| 4716 | #endif
|
---|
| 4717 | }
|
---|
| 4718 | }
|
---|
| 4719 | }
|
---|
| 4720 |
|
---|
| 4721 | } /* FOR */
|
---|
| 4722 |
|
---|
| 4723 | if (e.iop >= iostack) {
|
---|
| 4724 | RCPRINTF(("READC: return 0, e.iop %p\n", e.iop));
|
---|
| 4725 | return (0);
|
---|
| 4726 | }
|
---|
| 4727 |
|
---|
| 4728 | DBGPRINTF(("READC: leave()...\n"));
|
---|
| 4729 | leave();
|
---|
| 4730 |
|
---|
| 4731 | /* NOTREACHED */
|
---|
| 4732 | return (0);
|
---|
| 4733 | }
|
---|
| 4734 |
|
---|
| 4735 | static void ioecho(char c)
|
---|
| 4736 | {
|
---|
| 4737 | if (flag['v'])
|
---|
| 4738 | write(2, &c, sizeof c);
|
---|
| 4739 | }
|
---|
| 4740 |
|
---|
| 4741 |
|
---|
| 4742 | static void pushio(struct ioarg *argp, int (*fn) (struct ioarg *))
|
---|
| 4743 | {
|
---|
| 4744 | DBGPRINTF(("PUSHIO: argp %p, argp->afid 0x%x, e.iop %p\n", argp,
|
---|
| 4745 | argp->afid, e.iop));
|
---|
| 4746 |
|
---|
| 4747 | /* Set env ptr for io source to next array spot and check for array overflow */
|
---|
| 4748 | if (++e.iop >= &iostack[NPUSH]) {
|
---|
| 4749 | e.iop--;
|
---|
| 4750 | err("Shell input nested too deeply");
|
---|
| 4751 | gflg++;
|
---|
| 4752 | return;
|
---|
| 4753 | }
|
---|
| 4754 |
|
---|
| 4755 | /* We did not overflow the NPUSH array spots so setup data structs */
|
---|
| 4756 |
|
---|
| 4757 | e.iop->iofn = (int (*)(struct ioarg *, struct io *)) fn; /* Store data source func ptr */
|
---|
| 4758 |
|
---|
| 4759 | if (argp->afid != AFID_NOBUF)
|
---|
| 4760 | e.iop->argp = argp;
|
---|
| 4761 | else {
|
---|
| 4762 |
|
---|
| 4763 | e.iop->argp = ioargstack + (e.iop - iostack); /* MAL - index into stack */
|
---|
| 4764 | *e.iop->argp = *argp; /* copy data from temp area into stack spot */
|
---|
| 4765 |
|
---|
| 4766 | /* MAL - mainbuf is for 1st data source (command line?) and all nested use a single shared buffer? */
|
---|
| 4767 |
|
---|
| 4768 | if (e.iop == &iostack[0])
|
---|
| 4769 | e.iop->argp->afbuf = &mainbuf;
|
---|
| 4770 | else
|
---|
| 4771 | e.iop->argp->afbuf = &sharedbuf;
|
---|
| 4772 |
|
---|
| 4773 | /* MAL - if not a termimal AND (commandline OR readable file) then give it a buffer id? */
|
---|
| 4774 | /* This line appears to be active when running scripts from command line */
|
---|
| 4775 | if ((isatty(e.iop->argp->afile) == 0)
|
---|
| 4776 | && (e.iop == &iostack[0]
|
---|
| 4777 | || lseek(e.iop->argp->afile, 0L, 1) != -1)) {
|
---|
| 4778 | if (++bufid == AFID_NOBUF) /* counter rollover check, AFID_NOBUF = 11111111 */
|
---|
| 4779 | bufid = AFID_ID; /* AFID_ID = 0 */
|
---|
| 4780 |
|
---|
| 4781 | e.iop->argp->afid = bufid; /* assign buffer id */
|
---|
| 4782 | }
|
---|
| 4783 |
|
---|
| 4784 | DBGPRINTF(("PUSHIO: iostack %p, e.iop %p, afbuf %p\n",
|
---|
| 4785 | iostack, e.iop, e.iop->argp->afbuf));
|
---|
| 4786 | DBGPRINTF(("PUSHIO: mbuf %p, sbuf %p, bid %d, e.iop %p\n",
|
---|
| 4787 | &mainbuf, &sharedbuf, bufid, e.iop));
|
---|
| 4788 |
|
---|
| 4789 | }
|
---|
| 4790 |
|
---|
| 4791 | e.iop->prev = ~'\n';
|
---|
| 4792 | e.iop->peekc = 0;
|
---|
| 4793 | e.iop->xchar = 0;
|
---|
| 4794 | e.iop->nlcount = 0;
|
---|
| 4795 |
|
---|
| 4796 | if (fn == filechar || fn == linechar)
|
---|
| 4797 | e.iop->task = XIO;
|
---|
| 4798 | else if (fn == (int (*)(struct ioarg *)) gravechar
|
---|
| 4799 | || fn == (int (*)(struct ioarg *)) qgravechar)
|
---|
| 4800 | e.iop->task = XGRAVE;
|
---|
| 4801 | else
|
---|
| 4802 | e.iop->task = XOTHER;
|
---|
| 4803 |
|
---|
| 4804 | return;
|
---|
| 4805 | }
|
---|
| 4806 |
|
---|
| 4807 | static struct io *setbase(struct io *ip)
|
---|
| 4808 | {
|
---|
| 4809 | REGISTER struct io *xp;
|
---|
| 4810 |
|
---|
| 4811 | xp = e.iobase;
|
---|
| 4812 | e.iobase = ip;
|
---|
| 4813 | return (xp);
|
---|
| 4814 | }
|
---|
| 4815 |
|
---|
| 4816 | /*
|
---|
| 4817 | * Input generating functions
|
---|
| 4818 | */
|
---|
| 4819 |
|
---|
| 4820 | /*
|
---|
| 4821 | * Produce the characters of a string, then a newline, then EOF.
|
---|
| 4822 | */
|
---|
| 4823 | static int nlchar(REGISTER struct ioarg *ap)
|
---|
| 4824 | {
|
---|
| 4825 | REGISTER int c;
|
---|
| 4826 |
|
---|
| 4827 | if (ap->aword == NULL)
|
---|
| 4828 | return (0);
|
---|
| 4829 | if ((c = *ap->aword++) == 0) {
|
---|
| 4830 | ap->aword = NULL;
|
---|
| 4831 | return ('\n');
|
---|
| 4832 | }
|
---|
| 4833 | return (c);
|
---|
| 4834 | }
|
---|
| 4835 |
|
---|
| 4836 | /*
|
---|
| 4837 | * Given a list of words, produce the characters
|
---|
| 4838 | * in them, with a space after each word.
|
---|
| 4839 | */
|
---|
| 4840 | static int wdchar(REGISTER struct ioarg *ap)
|
---|
| 4841 | {
|
---|
| 4842 | REGISTER char c;
|
---|
| 4843 | REGISTER char **wl;
|
---|
| 4844 |
|
---|
| 4845 | if ((wl = ap->awordlist) == NULL)
|
---|
| 4846 | return (0);
|
---|
| 4847 | if (*wl != NULL) {
|
---|
| 4848 | if ((c = *(*wl)++) != 0)
|
---|
| 4849 | return (c & 0177);
|
---|
| 4850 | ap->awordlist++;
|
---|
| 4851 | return (' ');
|
---|
| 4852 | }
|
---|
| 4853 | ap->awordlist = NULL;
|
---|
| 4854 | return ('\n');
|
---|
| 4855 | }
|
---|
| 4856 |
|
---|
| 4857 | /*
|
---|
| 4858 | * Return the characters of a list of words,
|
---|
| 4859 | * producing a space between them.
|
---|
| 4860 | */
|
---|
| 4861 | static int dolchar(REGISTER struct ioarg *ap)
|
---|
| 4862 | {
|
---|
| 4863 | REGISTER char *wp;
|
---|
| 4864 |
|
---|
| 4865 | if ((wp = *ap->awordlist++) != NULL) {
|
---|
| 4866 | PUSHIO(aword, wp, *ap->awordlist == NULL ? strchar : xxchar);
|
---|
| 4867 | return (-1);
|
---|
| 4868 | }
|
---|
| 4869 | return (0);
|
---|
| 4870 | }
|
---|
| 4871 |
|
---|
| 4872 | static int xxchar(REGISTER struct ioarg *ap)
|
---|
| 4873 | {
|
---|
| 4874 | REGISTER int c;
|
---|
| 4875 |
|
---|
| 4876 | if (ap->aword == NULL)
|
---|
| 4877 | return (0);
|
---|
| 4878 | if ((c = *ap->aword++) == '\0') {
|
---|
| 4879 | ap->aword = NULL;
|
---|
| 4880 | return (' ');
|
---|
| 4881 | }
|
---|
| 4882 | return (c);
|
---|
| 4883 | }
|
---|
| 4884 |
|
---|
| 4885 | /*
|
---|
| 4886 | * Produce the characters from a single word (string).
|
---|
| 4887 | */
|
---|
| 4888 | static int strchar(REGISTER struct ioarg *ap)
|
---|
| 4889 | {
|
---|
| 4890 | REGISTER int c;
|
---|
| 4891 |
|
---|
| 4892 | if (ap->aword == NULL || (c = *ap->aword++) == 0)
|
---|
| 4893 | return (0);
|
---|
| 4894 | return (c);
|
---|
| 4895 | }
|
---|
| 4896 |
|
---|
| 4897 | /*
|
---|
| 4898 | * Produce quoted characters from a single word (string).
|
---|
| 4899 | */
|
---|
| 4900 | static int qstrchar(REGISTER struct ioarg *ap)
|
---|
| 4901 | {
|
---|
| 4902 | REGISTER int c;
|
---|
| 4903 |
|
---|
| 4904 | if (ap->aword == NULL || (c = *ap->aword++) == 0)
|
---|
| 4905 | return (0);
|
---|
| 4906 | return (c | QUOTE);
|
---|
| 4907 | }
|
---|
| 4908 |
|
---|
| 4909 | /*
|
---|
| 4910 | * Return the characters from a file.
|
---|
| 4911 | */
|
---|
| 4912 | static int filechar(REGISTER struct ioarg *ap)
|
---|
| 4913 | {
|
---|
| 4914 | REGISTER int i;
|
---|
| 4915 | char c;
|
---|
| 4916 | struct iobuf *bp = ap->afbuf;
|
---|
| 4917 |
|
---|
| 4918 | if (ap->afid != AFID_NOBUF) {
|
---|
| 4919 | if ((i = ap->afid != bp->id) || bp->bufp == bp->ebufp) {
|
---|
| 4920 |
|
---|
| 4921 | if (i)
|
---|
| 4922 | lseek(ap->afile, ap->afpos, 0);
|
---|
| 4923 |
|
---|
| 4924 | i = safe_read(ap->afile, bp->buf, sizeof(bp->buf));
|
---|
| 4925 |
|
---|
| 4926 | if (i <= 0) {
|
---|
| 4927 | closef(ap->afile);
|
---|
| 4928 | return 0;
|
---|
| 4929 | }
|
---|
| 4930 |
|
---|
| 4931 | bp->id = ap->afid;
|
---|
| 4932 | bp->ebufp = (bp->bufp = bp->buf) + i;
|
---|
| 4933 | }
|
---|
| 4934 |
|
---|
| 4935 | ap->afpos++;
|
---|
| 4936 | return *bp->bufp++ & 0177;
|
---|
| 4937 | }
|
---|
| 4938 | #ifdef CONFIG_FEATURE_COMMAND_EDITING
|
---|
| 4939 | if (interactive && isatty(ap->afile)) {
|
---|
| 4940 | static char mycommand[BUFSIZ];
|
---|
| 4941 | static int position = 0, size = 0;
|
---|
| 4942 |
|
---|
| 4943 | while (size == 0 || position >= size) {
|
---|
| 4944 | cmdedit_read_input(current_prompt, mycommand);
|
---|
| 4945 | size = strlen(mycommand);
|
---|
| 4946 | position = 0;
|
---|
| 4947 | }
|
---|
| 4948 | c = mycommand[position];
|
---|
| 4949 | position++;
|
---|
| 4950 | return (c);
|
---|
| 4951 | } else
|
---|
| 4952 | #endif
|
---|
| 4953 |
|
---|
| 4954 | {
|
---|
| 4955 | i = safe_read(ap->afile, &c, sizeof(c));
|
---|
| 4956 | return (i == sizeof(c) ? (c & 0x7f) : (closef(ap->afile), 0));
|
---|
| 4957 | }
|
---|
| 4958 | }
|
---|
| 4959 |
|
---|
| 4960 | /*
|
---|
| 4961 | * Return the characters from a here temp file.
|
---|
| 4962 | */
|
---|
| 4963 | static int herechar(REGISTER struct ioarg *ap)
|
---|
| 4964 | {
|
---|
| 4965 | char c;
|
---|
| 4966 |
|
---|
| 4967 |
|
---|
| 4968 | if (read(ap->afile, &c, sizeof(c)) != sizeof(c)) {
|
---|
| 4969 | close(ap->afile);
|
---|
| 4970 | c = 0;
|
---|
| 4971 | }
|
---|
| 4972 | return (c);
|
---|
| 4973 |
|
---|
| 4974 | }
|
---|
| 4975 |
|
---|
| 4976 | /*
|
---|
| 4977 | * Return the characters produced by a process (`...`).
|
---|
| 4978 | * Quote them if required, and remove any trailing newline characters.
|
---|
| 4979 | */
|
---|
| 4980 | static int gravechar(struct ioarg *ap, struct io *iop)
|
---|
| 4981 | {
|
---|
| 4982 | REGISTER int c;
|
---|
| 4983 |
|
---|
| 4984 | if ((c = qgravechar(ap, iop) & ~QUOTE) == '\n')
|
---|
| 4985 | c = ' ';
|
---|
| 4986 | return (c);
|
---|
| 4987 | }
|
---|
| 4988 |
|
---|
| 4989 | static int qgravechar(REGISTER struct ioarg *ap, struct io *iop)
|
---|
| 4990 | {
|
---|
| 4991 | REGISTER int c;
|
---|
| 4992 |
|
---|
| 4993 | DBGPRINTF3(("QGRAVECHAR: enter, ap=%p, iop=%p\n", ap, iop));
|
---|
| 4994 |
|
---|
| 4995 | if (iop->xchar) {
|
---|
| 4996 | if (iop->nlcount) {
|
---|
| 4997 | iop->nlcount--;
|
---|
| 4998 | return ('\n' | QUOTE);
|
---|
| 4999 | }
|
---|
| 5000 | c = iop->xchar;
|
---|
| 5001 | iop->xchar = 0;
|
---|
| 5002 | } else if ((c = filechar(ap)) == '\n') {
|
---|
| 5003 | iop->nlcount = 1;
|
---|
| 5004 | while ((c = filechar(ap)) == '\n')
|
---|
| 5005 | iop->nlcount++;
|
---|
| 5006 | iop->xchar = c;
|
---|
| 5007 | if (c == 0)
|
---|
| 5008 | return (c);
|
---|
| 5009 | iop->nlcount--;
|
---|
| 5010 | c = '\n';
|
---|
| 5011 | }
|
---|
| 5012 | return (c != 0 ? c | QUOTE : 0);
|
---|
| 5013 | }
|
---|
| 5014 |
|
---|
| 5015 | /*
|
---|
| 5016 | * Return a single command (usually the first line) from a file.
|
---|
| 5017 | */
|
---|
| 5018 | static int linechar(REGISTER struct ioarg *ap)
|
---|
| 5019 | {
|
---|
| 5020 | REGISTER int c;
|
---|
| 5021 |
|
---|
| 5022 | if ((c = filechar(ap)) == '\n') {
|
---|
| 5023 | if (!multiline) {
|
---|
| 5024 | closef(ap->afile);
|
---|
| 5025 | ap->afile = -1; /* illegal value */
|
---|
| 5026 | }
|
---|
| 5027 | }
|
---|
| 5028 | return (c);
|
---|
| 5029 | }
|
---|
| 5030 |
|
---|
| 5031 | static void prs(REGISTER const char *s)
|
---|
| 5032 | {
|
---|
| 5033 | if (*s)
|
---|
| 5034 | write(2, s, strlen(s));
|
---|
| 5035 | }
|
---|
| 5036 |
|
---|
| 5037 | static void prn(unsigned u)
|
---|
| 5038 | {
|
---|
| 5039 | prs(itoa(u));
|
---|
| 5040 | }
|
---|
| 5041 |
|
---|
| 5042 | static void closef(REGISTER int i)
|
---|
| 5043 | {
|
---|
| 5044 | if (i > 2)
|
---|
| 5045 | close(i);
|
---|
| 5046 | }
|
---|
| 5047 |
|
---|
| 5048 | static void closeall(void)
|
---|
| 5049 | {
|
---|
| 5050 | REGISTER int u;
|
---|
| 5051 |
|
---|
| 5052 | for (u = NUFILE; u < NOFILE;)
|
---|
| 5053 | close(u++);
|
---|
| 5054 | }
|
---|
| 5055 |
|
---|
| 5056 |
|
---|
| 5057 | /*
|
---|
| 5058 | * remap fd into Shell's fd space
|
---|
| 5059 | */
|
---|
| 5060 | static int remap(REGISTER int fd)
|
---|
| 5061 | {
|
---|
| 5062 | REGISTER int i;
|
---|
| 5063 | int map[NOFILE];
|
---|
| 5064 | int newfd;
|
---|
| 5065 |
|
---|
| 5066 |
|
---|
| 5067 | DBGPRINTF(("REMAP: fd=%d, e.iofd=%d\n", fd, e.iofd));
|
---|
| 5068 |
|
---|
| 5069 | if (fd < e.iofd) {
|
---|
| 5070 | for (i = 0; i < NOFILE; i++)
|
---|
| 5071 | map[i] = 0;
|
---|
| 5072 |
|
---|
| 5073 | do {
|
---|
| 5074 | map[fd] = 1;
|
---|
| 5075 | newfd = dup(fd);
|
---|
| 5076 | fd = newfd;
|
---|
| 5077 | } while (fd >= 0 && fd < e.iofd);
|
---|
| 5078 |
|
---|
| 5079 | for (i = 0; i < NOFILE; i++)
|
---|
| 5080 | if (map[i])
|
---|
| 5081 | close(i);
|
---|
| 5082 |
|
---|
| 5083 | if (fd < 0)
|
---|
| 5084 | err("too many files open in shell");
|
---|
| 5085 | }
|
---|
| 5086 |
|
---|
| 5087 | return (fd);
|
---|
| 5088 | }
|
---|
| 5089 |
|
---|
| 5090 | static int openpipe(REGISTER int *pv)
|
---|
| 5091 | {
|
---|
| 5092 | REGISTER int i;
|
---|
| 5093 |
|
---|
| 5094 | if ((i = pipe(pv)) < 0)
|
---|
| 5095 | err("can't create pipe - try again");
|
---|
| 5096 | return (i);
|
---|
| 5097 | }
|
---|
| 5098 |
|
---|
| 5099 | static void closepipe(REGISTER int *pv)
|
---|
| 5100 | {
|
---|
| 5101 | if (pv != NULL) {
|
---|
| 5102 | close(*pv++);
|
---|
| 5103 | close(*pv);
|
---|
| 5104 | }
|
---|
| 5105 | }
|
---|
| 5106 |
|
---|
| 5107 | /* -------- here.c -------- */
|
---|
| 5108 |
|
---|
| 5109 | /*
|
---|
| 5110 | * here documents
|
---|
| 5111 | */
|
---|
| 5112 |
|
---|
| 5113 | static void markhere(REGISTER char *s, struct ioword *iop)
|
---|
| 5114 | {
|
---|
| 5115 | REGISTER struct here *h, *lh;
|
---|
| 5116 |
|
---|
| 5117 | DBGPRINTF7(("MARKHERE: enter, s=%p\n", s));
|
---|
| 5118 |
|
---|
| 5119 | h = (struct here *) space(sizeof(struct here));
|
---|
| 5120 | if (h == 0)
|
---|
| 5121 | return;
|
---|
| 5122 |
|
---|
| 5123 | h->h_tag = evalstr(s, DOSUB);
|
---|
| 5124 | if (h->h_tag == 0)
|
---|
| 5125 | return;
|
---|
| 5126 |
|
---|
| 5127 | h->h_iop = iop;
|
---|
| 5128 | iop->io_name = 0;
|
---|
| 5129 | h->h_next = NULL;
|
---|
| 5130 | if (inhere == 0)
|
---|
| 5131 | inhere = h;
|
---|
| 5132 | else
|
---|
| 5133 | for (lh = inhere; lh != NULL; lh = lh->h_next)
|
---|
| 5134 | if (lh->h_next == 0) {
|
---|
| 5135 | lh->h_next = h;
|
---|
| 5136 | break;
|
---|
| 5137 | }
|
---|
| 5138 | iop->io_flag |= IOHERE | IOXHERE;
|
---|
| 5139 | for (s = h->h_tag; *s; s++)
|
---|
| 5140 | if (*s & QUOTE) {
|
---|
| 5141 | iop->io_flag &= ~IOXHERE;
|
---|
| 5142 | *s &= ~QUOTE;
|
---|
| 5143 | }
|
---|
| 5144 | h->h_dosub = iop->io_flag & IOXHERE;
|
---|
| 5145 | }
|
---|
| 5146 |
|
---|
| 5147 | static void gethere(void)
|
---|
| 5148 | {
|
---|
| 5149 | REGISTER struct here *h, *hp;
|
---|
| 5150 |
|
---|
| 5151 | DBGPRINTF7(("GETHERE: enter...\n"));
|
---|
| 5152 |
|
---|
| 5153 | /* Scan here files first leaving inhere list in place */
|
---|
| 5154 | for (hp = h = inhere; h != NULL; hp = h, h = h->h_next)
|
---|
| 5155 | readhere(&h->h_iop->io_name, h->h_tag, h->h_dosub ? 0 : '\'');
|
---|
| 5156 |
|
---|
| 5157 | /* Make inhere list active - keep list intact for scraphere */
|
---|
| 5158 | if (hp != NULL) {
|
---|
| 5159 | hp->h_next = acthere;
|
---|
| 5160 | acthere = inhere;
|
---|
| 5161 | inhere = NULL;
|
---|
| 5162 | }
|
---|
| 5163 | }
|
---|
| 5164 |
|
---|
| 5165 | static void readhere(char **name, REGISTER char *s, int ec)
|
---|
| 5166 | {
|
---|
| 5167 | int tf;
|
---|
| 5168 | char tname[30] = ".msh_XXXXXX";
|
---|
| 5169 | REGISTER int c;
|
---|
| 5170 | jmp_buf ev;
|
---|
| 5171 | char myline[LINELIM + 1];
|
---|
| 5172 | char *thenext;
|
---|
| 5173 |
|
---|
| 5174 | DBGPRINTF7(("READHERE: enter, name=%p, s=%p\n", name, s));
|
---|
| 5175 |
|
---|
| 5176 | tf = mkstemp(tname);
|
---|
| 5177 | if (tf < 0)
|
---|
| 5178 | return;
|
---|
| 5179 |
|
---|
| 5180 | *name = strsave(tname, areanum);
|
---|
| 5181 | if (newenv(setjmp(errpt = ev)) != 0)
|
---|
| 5182 | unlink(tname);
|
---|
| 5183 | else {
|
---|
| 5184 | pushio(e.iop->argp, (int (*)(struct ioarg *)) e.iop->iofn);
|
---|
| 5185 | e.iobase = e.iop;
|
---|
| 5186 | for (;;) {
|
---|
| 5187 | if (interactive && e.iop <= iostack) {
|
---|
| 5188 | #ifdef CONFIG_FEATURE_COMMAND_EDITING
|
---|
| 5189 | current_prompt = cprompt->value;
|
---|
| 5190 | #else
|
---|
| 5191 | prs(cprompt->value);
|
---|
| 5192 | #endif
|
---|
| 5193 | }
|
---|
| 5194 | thenext = myline;
|
---|
| 5195 | while ((c = my_getc(ec)) != '\n' && c) {
|
---|
| 5196 | if (ec == '\'')
|
---|
| 5197 | c &= ~QUOTE;
|
---|
| 5198 | if (thenext >= &myline[LINELIM]) {
|
---|
| 5199 | c = 0;
|
---|
| 5200 | break;
|
---|
| 5201 | }
|
---|
| 5202 | *thenext++ = c;
|
---|
| 5203 | }
|
---|
| 5204 | *thenext = 0;
|
---|
| 5205 | if (strcmp(s, myline) == 0 || c == 0)
|
---|
| 5206 | break;
|
---|
| 5207 | *thenext++ = '\n';
|
---|
| 5208 | write(tf, myline, (int) (thenext - myline));
|
---|
| 5209 | }
|
---|
| 5210 | if (c == 0) {
|
---|
| 5211 | prs("here document `");
|
---|
| 5212 | prs(s);
|
---|
| 5213 | err("' unclosed");
|
---|
| 5214 | }
|
---|
| 5215 | quitenv();
|
---|
| 5216 | }
|
---|
| 5217 | close(tf);
|
---|
| 5218 | }
|
---|
| 5219 |
|
---|
| 5220 | /*
|
---|
| 5221 | * open here temp file.
|
---|
| 5222 | * if unquoted here, expand here temp file into second temp file.
|
---|
| 5223 | */
|
---|
| 5224 | static int herein(char *hname, int xdoll)
|
---|
| 5225 | {
|
---|
| 5226 | REGISTER int hf;
|
---|
| 5227 | int tf;
|
---|
| 5228 |
|
---|
| 5229 | #if __GNUC__
|
---|
| 5230 | /* Avoid longjmp clobbering */
|
---|
| 5231 | (void) &tf;
|
---|
| 5232 | #endif
|
---|
| 5233 | if (hname == NULL)
|
---|
| 5234 | return (-1);
|
---|
| 5235 |
|
---|
| 5236 | DBGPRINTF7(("HEREIN: hname is %s, xdoll=%d\n", hname, xdoll));
|
---|
| 5237 |
|
---|
| 5238 | hf = open(hname, 0);
|
---|
| 5239 | if (hf < 0)
|
---|
| 5240 | return (-1);
|
---|
| 5241 |
|
---|
| 5242 | if (xdoll) {
|
---|
| 5243 | char c;
|
---|
| 5244 | char tname[30] = ".msh_XXXXXX";
|
---|
| 5245 | jmp_buf ev;
|
---|
| 5246 |
|
---|
| 5247 | tf = mkstemp(tname);
|
---|
| 5248 | if (tf < 0)
|
---|
| 5249 | return (-1);
|
---|
| 5250 | if (newenv(setjmp(errpt = ev)) == 0) {
|
---|
| 5251 | PUSHIO(afile, hf, herechar);
|
---|
| 5252 | setbase(e.iop);
|
---|
| 5253 | while ((c = subgetc(0, 0)) != 0) {
|
---|
| 5254 | c &= ~QUOTE;
|
---|
| 5255 | write(tf, &c, sizeof c);
|
---|
| 5256 | }
|
---|
| 5257 | quitenv();
|
---|
| 5258 | } else
|
---|
| 5259 | unlink(tname);
|
---|
| 5260 | close(tf);
|
---|
| 5261 | tf = open(tname, 0);
|
---|
| 5262 | unlink(tname);
|
---|
| 5263 | return (tf);
|
---|
| 5264 | } else
|
---|
| 5265 | return (hf);
|
---|
| 5266 | }
|
---|
| 5267 |
|
---|
| 5268 | static void scraphere(void)
|
---|
| 5269 | {
|
---|
| 5270 | REGISTER struct here *h;
|
---|
| 5271 |
|
---|
| 5272 | DBGPRINTF7(("SCRAPHERE: enter...\n"));
|
---|
| 5273 |
|
---|
| 5274 | for (h = inhere; h != NULL; h = h->h_next) {
|
---|
| 5275 | if (h->h_iop && h->h_iop->io_name)
|
---|
| 5276 | unlink(h->h_iop->io_name);
|
---|
| 5277 | }
|
---|
| 5278 | inhere = NULL;
|
---|
| 5279 | }
|
---|
| 5280 |
|
---|
| 5281 | /* unlink here temp files before a freearea(area) */
|
---|
| 5282 | static void freehere(int area)
|
---|
| 5283 | {
|
---|
| 5284 | REGISTER struct here *h, *hl;
|
---|
| 5285 |
|
---|
| 5286 | DBGPRINTF6(("FREEHERE: enter, area=%d\n", area));
|
---|
| 5287 |
|
---|
| 5288 | hl = NULL;
|
---|
| 5289 | for (h = acthere; h != NULL; h = h->h_next)
|
---|
| 5290 | if (getarea((char *) h) >= area) {
|
---|
| 5291 | if (h->h_iop->io_name != NULL)
|
---|
| 5292 | unlink(h->h_iop->io_name);
|
---|
| 5293 | if (hl == NULL)
|
---|
| 5294 | acthere = h->h_next;
|
---|
| 5295 | else
|
---|
| 5296 | hl->h_next = h->h_next;
|
---|
| 5297 | } else
|
---|
| 5298 | hl = h;
|
---|
| 5299 | }
|
---|
| 5300 |
|
---|
| 5301 |
|
---|
| 5302 |
|
---|
| 5303 | /*
|
---|
| 5304 | * Copyright (c) 1987,1997, Prentice Hall
|
---|
| 5305 | * All rights reserved.
|
---|
| 5306 | *
|
---|
| 5307 | * Redistribution and use of the MINIX operating system in source and
|
---|
| 5308 | * binary forms, with or without modification, are permitted provided
|
---|
| 5309 | * that the following conditions are met:
|
---|
| 5310 | *
|
---|
| 5311 | * Redistributions of source code must retain the above copyright
|
---|
| 5312 | * notice, this list of conditions and the following disclaimer.
|
---|
| 5313 | *
|
---|
| 5314 | * Redistributions in binary form must reproduce the above
|
---|
| 5315 | * copyright notice, this list of conditions and the following
|
---|
| 5316 | * disclaimer in the documentation and/or other materials provided
|
---|
| 5317 | * with the distribution.
|
---|
| 5318 | *
|
---|
| 5319 | * Neither the name of Prentice Hall nor the names of the software
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| 5320 | * authors or contributors may be used to endorse or promote
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| 5321 | * products derived from this software without specific prior
|
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| 5322 | * written permission.
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| 5323 | *
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| 5324 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND
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| 5325 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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| 5326 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 5327 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 5328 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE
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| 5329 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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| 5330 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 5331 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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| 5332 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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| 5333 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
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| 5334 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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| 5335 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 5336 | *
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| 5337 | */
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