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 */
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456 | struct iobuf {
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457 | unsigned id; /* buffer id */
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458 | char buf[512]; /* buffer */
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459 | char *bufp; /* pointer into buffer */
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460 | char *ebufp; /* pointer to end of buffer */
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461 | };
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462 |
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463 | /* possible arguments to an IO function */
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464 | struct ioarg {
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465 | char *aword;
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466 | char **awordlist;
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467 | int afile; /* file descriptor */
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468 | unsigned afid; /* buffer id */
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469 | long afpos; /* file position */
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470 | struct iobuf *afbuf; /* buffer for this file */
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471 | };
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472 |
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473 | //static struct ioarg ioargstack[NPUSH];
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474 | #define AFID_NOBUF (~0)
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475 | #define AFID_ID 0
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476 |
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477 | /* an input generator's state */
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478 | struct io {
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479 | int (*iofn) (struct ioarg *, struct io *);
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480 | struct ioarg *argp;
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481 | int peekc;
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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 |
|
---|
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 | }
|
---|
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
|
---|
5320 | * authors or contributors may be used to endorse or promote
|
---|
5321 | * products derived from this software without specific prior
|
---|
5322 | * written permission.
|
---|
5323 | *
|
---|
5324 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND
|
---|
5325 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
---|
5326 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
---|
5327 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
---|
5328 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE
|
---|
5329 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
---|
5330 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
---|
5331 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
---|
5332 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
---|
5333 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
---|
5334 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
---|
5335 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
5336 | *
|
---|
5337 | */
|
---|