[821] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * Minix shell port for busybox
|
---|
| 4 | *
|
---|
| 5 | * This version of the Minix shell was adapted for use in busybox
|
---|
| 6 | * by Erik Andersen <andersen@codepoet.org>
|
---|
| 7 | *
|
---|
| 8 | * - backtick expansion did not work properly
|
---|
| 9 | * Jonas Holmberg <jonas.holmberg@axis.com>
|
---|
| 10 | * Robert Schwebel <r.schwebel@pengutronix.de>
|
---|
| 11 | * Erik Andersen <andersen@codepoet.org>
|
---|
| 12 | *
|
---|
[1770] | 13 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
[821] | 14 | */
|
---|
| 15 |
|
---|
[1770] | 16 | #include <sys/times.h>
|
---|
[821] | 17 | #include <setjmp.h>
|
---|
| 18 |
|
---|
[1770] | 19 | #ifdef STANDALONE
|
---|
| 20 | # ifndef _GNU_SOURCE
|
---|
| 21 | # define _GNU_SOURCE
|
---|
| 22 | # endif
|
---|
| 23 | # include <sys/types.h>
|
---|
| 24 | # include <sys/stat.h>
|
---|
| 25 | # include <sys/wait.h>
|
---|
| 26 | # include <signal.h>
|
---|
| 27 | # include <stdio.h>
|
---|
| 28 | # include <stdlib.h>
|
---|
| 29 | # include <unistd.h>
|
---|
| 30 | # include <string.h>
|
---|
| 31 | # include <errno.h>
|
---|
| 32 | # include <dirent.h>
|
---|
| 33 | # include <fcntl.h>
|
---|
| 34 | # include <ctype.h>
|
---|
| 35 | # include <assert.h>
|
---|
| 36 | # define bb_dev_null "/dev/null"
|
---|
| 37 | # define DEFAULT_SHELL "/proc/self/exe"
|
---|
| 38 | # define CONFIG_BUSYBOX_EXEC_PATH "/proc/self/exe"
|
---|
| 39 | # define bb_banner "busybox standalone"
|
---|
| 40 | # define ENABLE_FEATURE_SH_STANDALONE 0
|
---|
| 41 | # define bb_msg_memory_exhausted "memory exhausted"
|
---|
| 42 | # define xmalloc(size) malloc(size)
|
---|
| 43 | # define msh_main(argc,argv) main(argc,argv)
|
---|
| 44 | # define safe_read(fd,buf,count) read(fd,buf,count)
|
---|
| 45 | # define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
|
---|
| 46 | # define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
|
---|
| 47 | # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
|
---|
| 48 | static char *find_applet_by_name(const char *applet)
|
---|
| 49 | {
|
---|
| 50 | return NULL;
|
---|
| 51 | }
|
---|
| 52 | static char *utoa_to_buf(unsigned n, char *buf, unsigned buflen)
|
---|
| 53 | {
|
---|
| 54 | unsigned i, out, res;
|
---|
| 55 | assert(sizeof(unsigned) == 4);
|
---|
| 56 | if (buflen) {
|
---|
| 57 | out = 0;
|
---|
| 58 | for (i = 1000000000; i; i /= 10) {
|
---|
| 59 | res = n / i;
|
---|
| 60 | if (res || out || i == 1) {
|
---|
| 61 | if (!--buflen) break;
|
---|
| 62 | out++;
|
---|
| 63 | n -= res*i;
|
---|
| 64 | *buf++ = '0' + res;
|
---|
| 65 | }
|
---|
| 66 | }
|
---|
| 67 | }
|
---|
| 68 | return buf;
|
---|
| 69 | }
|
---|
| 70 | static char *itoa_to_buf(int n, char *buf, unsigned buflen)
|
---|
| 71 | {
|
---|
| 72 | if (buflen && n < 0) {
|
---|
| 73 | n = -n;
|
---|
| 74 | *buf++ = '-';
|
---|
| 75 | buflen--;
|
---|
| 76 | }
|
---|
| 77 | return utoa_to_buf((unsigned)n, buf, buflen);
|
---|
| 78 | }
|
---|
| 79 | static char local_buf[12];
|
---|
| 80 | static char *itoa(int n)
|
---|
| 81 | {
|
---|
| 82 | *(itoa_to_buf(n, local_buf, sizeof(local_buf))) = '\0';
|
---|
| 83 | return local_buf;
|
---|
| 84 | }
|
---|
| 85 | #else
|
---|
| 86 | # include "busybox.h"
|
---|
| 87 | extern char **environ;
|
---|
| 88 | #endif
|
---|
[821] | 89 |
|
---|
| 90 | /*#define MSHDEBUG 1*/
|
---|
| 91 |
|
---|
| 92 | #ifdef MSHDEBUG
|
---|
| 93 | int mshdbg = MSHDEBUG;
|
---|
| 94 |
|
---|
[1770] | 95 | #define DBGPRINTF(x) if (mshdbg>0) printf x
|
---|
| 96 | #define DBGPRINTF0(x) if (mshdbg>0) printf x
|
---|
| 97 | #define DBGPRINTF1(x) if (mshdbg>1) printf x
|
---|
| 98 | #define DBGPRINTF2(x) if (mshdbg>2) printf x
|
---|
| 99 | #define DBGPRINTF3(x) if (mshdbg>3) printf x
|
---|
| 100 | #define DBGPRINTF4(x) if (mshdbg>4) printf x
|
---|
| 101 | #define DBGPRINTF5(x) if (mshdbg>5) printf x
|
---|
| 102 | #define DBGPRINTF6(x) if (mshdbg>6) printf x
|
---|
| 103 | #define DBGPRINTF7(x) if (mshdbg>7) printf x
|
---|
| 104 | #define DBGPRINTF8(x) if (mshdbg>8) printf x
|
---|
| 105 | #define DBGPRINTF9(x) if (mshdbg>9) printf x
|
---|
[821] | 106 |
|
---|
| 107 | int mshdbg_rc = 0;
|
---|
| 108 |
|
---|
[1770] | 109 | #define RCPRINTF(x) if (mshdbg_rc) printf x
|
---|
[821] | 110 |
|
---|
| 111 | #else
|
---|
| 112 |
|
---|
| 113 | #define DBGPRINTF(x)
|
---|
[1770] | 114 | #define DBGPRINTF0(x) ((void)0)
|
---|
| 115 | #define DBGPRINTF1(x) ((void)0)
|
---|
| 116 | #define DBGPRINTF2(x) ((void)0)
|
---|
| 117 | #define DBGPRINTF3(x) ((void)0)
|
---|
| 118 | #define DBGPRINTF4(x) ((void)0)
|
---|
| 119 | #define DBGPRINTF5(x) ((void)0)
|
---|
| 120 | #define DBGPRINTF6(x) ((void)0)
|
---|
| 121 | #define DBGPRINTF7(x) ((void)0)
|
---|
| 122 | #define DBGPRINTF8(x) ((void)0)
|
---|
| 123 | #define DBGPRINTF9(x) ((void)0)
|
---|
[821] | 124 |
|
---|
[1770] | 125 | #define RCPRINTF(x) ((void)0)
|
---|
[821] | 126 |
|
---|
| 127 | #endif /* MSHDEBUG */
|
---|
| 128 |
|
---|
| 129 |
|
---|
[1770] | 130 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
[821] | 131 | # define DEFAULT_ROOT_PROMPT "\\u:\\w> "
|
---|
| 132 | # define DEFAULT_USER_PROMPT "\\u:\\w$ "
|
---|
| 133 | #else
|
---|
| 134 | # define DEFAULT_ROOT_PROMPT "# "
|
---|
| 135 | # define DEFAULT_USER_PROMPT "$ "
|
---|
| 136 | #endif
|
---|
| 137 |
|
---|
| 138 |
|
---|
| 139 | /* -------- sh.h -------- */
|
---|
| 140 | /*
|
---|
| 141 | * shell
|
---|
| 142 | */
|
---|
| 143 |
|
---|
| 144 | #define LINELIM 2100
|
---|
| 145 | #define NPUSH 8 /* limit to input nesting */
|
---|
| 146 |
|
---|
| 147 | #undef NOFILE
|
---|
| 148 | #define NOFILE 20 /* Number of open files */
|
---|
| 149 | #define NUFILE 10 /* Number of user-accessible files */
|
---|
| 150 | #define FDBASE 10 /* First file usable by Shell */
|
---|
| 151 |
|
---|
| 152 | /*
|
---|
| 153 | * values returned by wait
|
---|
| 154 | */
|
---|
[1770] | 155 | #define WAITSIG(s) ((s) & 0177)
|
---|
| 156 | #define WAITVAL(s) (((s) >> 8) & 0377)
|
---|
| 157 | #define WAITCORE(s) (((s) & 0200) != 0)
|
---|
[821] | 158 |
|
---|
| 159 | /*
|
---|
| 160 | * library and system definitions
|
---|
| 161 | */
|
---|
| 162 | typedef void xint; /* base type of jmp_buf, for not broken compilers */
|
---|
| 163 |
|
---|
| 164 | /*
|
---|
| 165 | * shell components
|
---|
| 166 | */
|
---|
| 167 | #define NOBLOCK ((struct op *)NULL)
|
---|
| 168 | #define NOWORD ((char *)NULL)
|
---|
| 169 | #define NOWORDS ((char **)NULL)
|
---|
| 170 | #define NOPIPE ((int *)NULL)
|
---|
| 171 |
|
---|
| 172 | /*
|
---|
[1770] | 173 | * redirection
|
---|
| 174 | */
|
---|
| 175 | struct ioword {
|
---|
| 176 | short io_unit; /* unit affected */
|
---|
| 177 | short io_flag; /* action (below) */
|
---|
| 178 | char *io_name; /* file name */
|
---|
| 179 | };
|
---|
| 180 |
|
---|
| 181 | #define IOREAD 1 /* < */
|
---|
| 182 | #define IOHERE 2 /* << (here file) */
|
---|
| 183 | #define IOWRITE 4 /* > */
|
---|
| 184 | #define IOCAT 8 /* >> */
|
---|
| 185 | #define IOXHERE 16 /* ${}, ` in << */
|
---|
| 186 | #define IODUP 32 /* >&digit */
|
---|
| 187 | #define IOCLOSE 64 /* >&- */
|
---|
| 188 |
|
---|
| 189 | #define IODEFAULT (-1) /* token for default IO unit */
|
---|
| 190 |
|
---|
| 191 |
|
---|
| 192 | /*
|
---|
[821] | 193 | * Description of a command or an operation on commands.
|
---|
| 194 | * Might eventually use a union.
|
---|
| 195 | */
|
---|
| 196 | struct op {
|
---|
| 197 | int type; /* operation type, see below */
|
---|
| 198 | char **words; /* arguments to a command */
|
---|
| 199 | struct ioword **ioact; /* IO actions (eg, < > >>) */
|
---|
| 200 | struct op *left;
|
---|
| 201 | struct op *right;
|
---|
| 202 | char *str; /* identifier for case and for */
|
---|
| 203 | };
|
---|
| 204 |
|
---|
| 205 | #define TCOM 1 /* command */
|
---|
| 206 | #define TPAREN 2 /* (c-list) */
|
---|
| 207 | #define TPIPE 3 /* a | b */
|
---|
| 208 | #define TLIST 4 /* a [&;] b */
|
---|
| 209 | #define TOR 5 /* || */
|
---|
| 210 | #define TAND 6 /* && */
|
---|
| 211 | #define TFOR 7
|
---|
| 212 | #define TDO 8
|
---|
| 213 | #define TCASE 9
|
---|
| 214 | #define TIF 10
|
---|
| 215 | #define TWHILE 11
|
---|
| 216 | #define TUNTIL 12
|
---|
| 217 | #define TELIF 13
|
---|
| 218 | #define TPAT 14 /* pattern in case */
|
---|
| 219 | #define TBRACE 15 /* {c-list} */
|
---|
| 220 | #define TASYNC 16 /* c & */
|
---|
| 221 | /* Added to support "." file expansion */
|
---|
| 222 | #define TDOT 17
|
---|
| 223 |
|
---|
| 224 | /* Strings for names to make debug easier */
|
---|
| 225 | #ifdef MSHDEBUG
|
---|
[1770] | 226 | static const char *const T_CMD_NAMES[] = {
|
---|
[821] | 227 | "PLACEHOLDER",
|
---|
| 228 | "TCOM",
|
---|
| 229 | "TPAREN",
|
---|
| 230 | "TPIPE",
|
---|
| 231 | "TLIST",
|
---|
| 232 | "TOR",
|
---|
| 233 | "TAND",
|
---|
| 234 | "TFOR",
|
---|
| 235 | "TDO",
|
---|
| 236 | "TCASE",
|
---|
| 237 | "TIF",
|
---|
| 238 | "TWHILE",
|
---|
| 239 | "TUNTIL",
|
---|
| 240 | "TELIF",
|
---|
| 241 | "TPAT",
|
---|
| 242 | "TBRACE",
|
---|
| 243 | "TASYNC",
|
---|
| 244 | "TDOT",
|
---|
| 245 | };
|
---|
| 246 | #endif
|
---|
| 247 |
|
---|
| 248 | /*
|
---|
| 249 | * actions determining the environment of a process
|
---|
| 250 | */
|
---|
[1770] | 251 | #define FEXEC 1 /* execute without forking */
|
---|
[821] | 252 |
|
---|
[1770] | 253 | #define AREASIZE (90000)
|
---|
[821] | 254 |
|
---|
| 255 | /*
|
---|
| 256 | * flags to control evaluation of words
|
---|
| 257 | */
|
---|
[1770] | 258 | #define DOSUB 1 /* interpret $, `, and quotes */
|
---|
| 259 | #define DOBLANK 2 /* perform blank interpretation */
|
---|
| 260 | #define DOGLOB 4 /* interpret [?* */
|
---|
| 261 | #define DOKEY 8 /* move words with `=' to 2nd arg. list */
|
---|
| 262 | #define DOTRIM 16 /* trim resulting string */
|
---|
[821] | 263 |
|
---|
[1770] | 264 | #define DOALL (DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM)
|
---|
[821] | 265 |
|
---|
| 266 |
|
---|
| 267 | struct brkcon {
|
---|
| 268 | jmp_buf brkpt;
|
---|
| 269 | struct brkcon *nextlev;
|
---|
| 270 | };
|
---|
| 271 |
|
---|
| 272 |
|
---|
| 273 | /*
|
---|
| 274 | * flags:
|
---|
| 275 | * -e: quit on error
|
---|
| 276 | * -k: look for name=value everywhere on command line
|
---|
| 277 | * -n: no execution
|
---|
| 278 | * -t: exit after reading and executing one command
|
---|
| 279 | * -v: echo as read
|
---|
| 280 | * -x: trace
|
---|
| 281 | * -u: unset variables net diagnostic
|
---|
| 282 | */
|
---|
[1770] | 283 | static char flags['z' - 'a' + 1] ALIGN1;
|
---|
| 284 | /* this looks weird, but is OK ... we index FLAG with 'a'...'z' */
|
---|
| 285 | #define FLAG (flags - 'a')
|
---|
[821] | 286 |
|
---|
[1770] | 287 | /* moved to G: static char *trap[_NSIG + 1]; */
|
---|
| 288 | /* moved to G: static char ourtrap[_NSIG + 1]; */
|
---|
[821] | 289 | static int trapset; /* trap pending */
|
---|
| 290 |
|
---|
| 291 | static int yynerrs; /* yacc */
|
---|
| 292 |
|
---|
[1770] | 293 | /* moved to G: static char line[LINELIM]; */
|
---|
[821] | 294 |
|
---|
[1770] | 295 | #if ENABLE_FEATURE_EDITING
|
---|
| 296 | static char *current_prompt;
|
---|
| 297 | static line_input_t *line_input_state;
|
---|
| 298 | #endif
|
---|
[821] | 299 |
|
---|
[1770] | 300 |
|
---|
[821] | 301 | /*
|
---|
| 302 | * other functions
|
---|
| 303 | */
|
---|
[1770] | 304 | static const char *rexecve(char *c, char **v, char **envp);
|
---|
[821] | 305 | static char *evalstr(char *cp, int f);
|
---|
| 306 | static char *putn(int n);
|
---|
| 307 | static char *unquote(char *as);
|
---|
| 308 | static int rlookup(char *n);
|
---|
| 309 | static struct wdblock *glob(char *cp, struct wdblock *wb);
|
---|
| 310 | static int my_getc(int ec);
|
---|
| 311 | static int subgetc(char ec, int quoted);
|
---|
| 312 | static char **makenv(int all, struct wdblock *wb);
|
---|
| 313 | static char **eval(char **ap, int f);
|
---|
| 314 | static int setstatus(int s);
|
---|
| 315 | static int waitfor(int lastpid, int canintr);
|
---|
| 316 |
|
---|
| 317 | static void onintr(int s); /* SIGINT handler */
|
---|
| 318 |
|
---|
| 319 | static int newenv(int f);
|
---|
| 320 | static void quitenv(void);
|
---|
| 321 | static void next(int f);
|
---|
| 322 | static void setdash(void);
|
---|
| 323 | static void onecommand(void);
|
---|
| 324 | static void runtrap(int i);
|
---|
| 325 |
|
---|
| 326 |
|
---|
| 327 | /* -------- area stuff -------- */
|
---|
| 328 |
|
---|
[1770] | 329 | #define REGSIZE sizeof(struct region)
|
---|
| 330 | #define GROWBY (256)
|
---|
| 331 | /* #define SHRINKBY (64) */
|
---|
| 332 | #undef SHRINKBY
|
---|
| 333 | #define FREE (32767)
|
---|
| 334 | #define BUSY (0)
|
---|
| 335 | #define ALIGN (sizeof(int)-1)
|
---|
[821] | 336 |
|
---|
| 337 |
|
---|
| 338 | struct region {
|
---|
| 339 | struct region *next;
|
---|
| 340 | int area;
|
---|
| 341 | };
|
---|
| 342 |
|
---|
| 343 |
|
---|
| 344 | /* -------- grammar stuff -------- */
|
---|
| 345 | typedef union {
|
---|
| 346 | char *cp;
|
---|
| 347 | char **wp;
|
---|
| 348 | int i;
|
---|
| 349 | struct op *o;
|
---|
| 350 | } YYSTYPE;
|
---|
| 351 |
|
---|
[1770] | 352 | #define WORD 256
|
---|
| 353 | #define LOGAND 257
|
---|
| 354 | #define LOGOR 258
|
---|
| 355 | #define BREAK 259
|
---|
| 356 | #define IF 260
|
---|
| 357 | #define THEN 261
|
---|
| 358 | #define ELSE 262
|
---|
| 359 | #define ELIF 263
|
---|
| 360 | #define FI 264
|
---|
| 361 | #define CASE 265
|
---|
| 362 | #define ESAC 266
|
---|
| 363 | #define FOR 267
|
---|
| 364 | #define WHILE 268
|
---|
| 365 | #define UNTIL 269
|
---|
| 366 | #define DO 270
|
---|
| 367 | #define DONE 271
|
---|
| 368 | #define IN 272
|
---|
[821] | 369 | /* Added for "." file expansion */
|
---|
[1770] | 370 | #define DOT 273
|
---|
[821] | 371 |
|
---|
| 372 | #define YYERRCODE 300
|
---|
| 373 |
|
---|
| 374 | /* flags to yylex */
|
---|
[1770] | 375 | #define CONTIN 01 /* skip new lines to complete command */
|
---|
[821] | 376 |
|
---|
| 377 | static struct op *pipeline(int cf);
|
---|
| 378 | static struct op *andor(void);
|
---|
| 379 | static struct op *c_list(void);
|
---|
| 380 | static int synio(int cf);
|
---|
| 381 | static void musthave(int c, int cf);
|
---|
| 382 | static struct op *simple(void);
|
---|
| 383 | static struct op *nested(int type, int mark);
|
---|
| 384 | static struct op *command(int cf);
|
---|
| 385 | static struct op *dogroup(int onlydone);
|
---|
| 386 | static struct op *thenpart(void);
|
---|
| 387 | static struct op *elsepart(void);
|
---|
| 388 | static struct op *caselist(void);
|
---|
| 389 | static struct op *casepart(void);
|
---|
| 390 | static char **pattern(void);
|
---|
| 391 | static char **wordlist(void);
|
---|
| 392 | static struct op *list(struct op *t1, struct op *t2);
|
---|
| 393 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp);
|
---|
| 394 | static struct op *newtp(void);
|
---|
| 395 | static struct op *namelist(struct op *t);
|
---|
| 396 | static char **copyw(void);
|
---|
| 397 | static void word(char *cp);
|
---|
| 398 | static struct ioword **copyio(void);
|
---|
| 399 | static struct ioword *io(int u, int f, char *cp);
|
---|
| 400 | static int yylex(int cf);
|
---|
| 401 | static int collect(int c, int c1);
|
---|
| 402 | static int dual(int c);
|
---|
| 403 | static void diag(int ec);
|
---|
| 404 | static char *tree(unsigned size);
|
---|
| 405 |
|
---|
| 406 | /* -------- var.h -------- */
|
---|
| 407 |
|
---|
| 408 | struct var {
|
---|
| 409 | char *value;
|
---|
| 410 | char *name;
|
---|
| 411 | struct var *next;
|
---|
| 412 | char status;
|
---|
| 413 | };
|
---|
| 414 |
|
---|
| 415 | #define COPYV 1 /* flag to setval, suggesting copy */
|
---|
| 416 | #define RONLY 01 /* variable is read-only */
|
---|
| 417 | #define EXPORT 02 /* variable is to be exported */
|
---|
| 418 | #define GETCELL 04 /* name & value space was got with getcell */
|
---|
| 419 |
|
---|
| 420 | static int yyparse(void);
|
---|
| 421 |
|
---|
| 422 | static int execute(struct op *t, int *pin, int *pout, int act);
|
---|
| 423 |
|
---|
| 424 |
|
---|
[1770] | 425 | #define AFID_NOBUF (~0)
|
---|
| 426 | #define AFID_ID 0
|
---|
| 427 |
|
---|
| 428 |
|
---|
[821] | 429 | /* -------- io.h -------- */
|
---|
| 430 | /* io buffer */
|
---|
| 431 | struct iobuf {
|
---|
[1770] | 432 | unsigned id; /* buffer id */
|
---|
| 433 | char buf[512]; /* buffer */
|
---|
| 434 | char *bufp; /* pointer into buffer */
|
---|
| 435 | char *ebufp; /* pointer to end of buffer */
|
---|
[821] | 436 | };
|
---|
| 437 |
|
---|
| 438 | /* possible arguments to an IO function */
|
---|
| 439 | struct ioarg {
|
---|
[1770] | 440 | const char *aword;
|
---|
[821] | 441 | char **awordlist;
|
---|
[1770] | 442 | int afile; /* file descriptor */
|
---|
| 443 | unsigned afid; /* buffer id */
|
---|
| 444 | long afpos; /* file position */
|
---|
| 445 | struct iobuf *afbuf; /* buffer for this file */
|
---|
[821] | 446 | };
|
---|
| 447 |
|
---|
| 448 | /* an input generator's state */
|
---|
| 449 | struct io {
|
---|
| 450 | int (*iofn) (struct ioarg *, struct io *);
|
---|
| 451 | struct ioarg *argp;
|
---|
| 452 | int peekc;
|
---|
[1770] | 453 | char prev; /* previous character read by readc() */
|
---|
| 454 | char nlcount; /* for `'s */
|
---|
| 455 | char xchar; /* for `'s */
|
---|
| 456 | char task; /* reason for pushed IO */
|
---|
[821] | 457 | };
|
---|
| 458 |
|
---|
| 459 | #define XOTHER 0 /* none of the below */
|
---|
| 460 | #define XDOLL 1 /* expanding ${} */
|
---|
| 461 | #define XGRAVE 2 /* expanding `'s */
|
---|
[1770] | 462 | #define XIO 3 /* file IO */
|
---|
[821] | 463 |
|
---|
| 464 | /* in substitution */
|
---|
| 465 | #define INSUB() (e.iop->task == XGRAVE || e.iop->task == XDOLL)
|
---|
| 466 |
|
---|
[1770] | 467 | static struct ioarg temparg = { 0, 0, 0, AFID_NOBUF, 0 }; /* temporary for PUSHIO */
|
---|
| 468 | /* moved to G: static struct ioarg ioargstack[NPUSH]; */
|
---|
| 469 | static struct io iostack[NPUSH];
|
---|
| 470 | /* moved to G: static struct iobuf sharedbuf = { AFID_NOBUF }; */
|
---|
| 471 | /* moved to G: static struct iobuf mainbuf = { AFID_NOBUF }; */
|
---|
| 472 | static unsigned bufid = AFID_ID; /* buffer id counter */
|
---|
[821] | 473 |
|
---|
[1770] | 474 | #define RUN(what,arg,gen) ((temparg.what = (arg)), run(&temparg,(gen)))
|
---|
| 475 |
|
---|
| 476 |
|
---|
[821] | 477 | /*
|
---|
| 478 | * input generators for IO structure
|
---|
| 479 | */
|
---|
| 480 | static int nlchar(struct ioarg *ap);
|
---|
| 481 | static int strchar(struct ioarg *ap);
|
---|
| 482 | static int qstrchar(struct ioarg *ap);
|
---|
| 483 | static int filechar(struct ioarg *ap);
|
---|
| 484 | static int herechar(struct ioarg *ap);
|
---|
| 485 | static int linechar(struct ioarg *ap);
|
---|
| 486 | static int gravechar(struct ioarg *ap, struct io *iop);
|
---|
| 487 | static int qgravechar(struct ioarg *ap, struct io *iop);
|
---|
| 488 | static int dolchar(struct ioarg *ap);
|
---|
| 489 | static int wdchar(struct ioarg *ap);
|
---|
| 490 | static void scraphere(void);
|
---|
| 491 | static void freehere(int area);
|
---|
| 492 | static void gethere(void);
|
---|
| 493 | static void markhere(char *s, struct ioword *iop);
|
---|
| 494 | static int herein(char *hname, int xdoll);
|
---|
| 495 | static int run(struct ioarg *argp, int (*f) (struct ioarg *));
|
---|
| 496 |
|
---|
| 497 |
|
---|
| 498 | static int eofc(void);
|
---|
| 499 | static int readc(void);
|
---|
| 500 | static void unget(int c);
|
---|
| 501 | static void ioecho(char c);
|
---|
| 502 |
|
---|
| 503 |
|
---|
| 504 | /*
|
---|
| 505 | * IO control
|
---|
| 506 | */
|
---|
| 507 | static void pushio(struct ioarg *argp, int (*f) (struct ioarg *));
|
---|
[1770] | 508 | #define PUSHIO(what,arg,gen) ((temparg.what = (arg)), pushio(&temparg,(gen)))
|
---|
[821] | 509 | static int remap(int fd);
|
---|
| 510 | static int openpipe(int *pv);
|
---|
| 511 | static void closepipe(int *pv);
|
---|
| 512 | static struct io *setbase(struct io *ip);
|
---|
| 513 |
|
---|
| 514 | /* -------- word.h -------- */
|
---|
| 515 |
|
---|
| 516 | #define NSTART 16 /* default number of words to allow for initially */
|
---|
| 517 |
|
---|
| 518 | struct wdblock {
|
---|
| 519 | short w_bsize;
|
---|
| 520 | short w_nword;
|
---|
| 521 | /* bounds are arbitrary */
|
---|
| 522 | char *w_words[1];
|
---|
| 523 | };
|
---|
| 524 |
|
---|
| 525 | static struct wdblock *addword(char *wd, struct wdblock *wb);
|
---|
| 526 | static struct wdblock *newword(int nw);
|
---|
| 527 | static char **getwords(struct wdblock *wb);
|
---|
| 528 |
|
---|
| 529 | /* -------- misc stuff -------- */
|
---|
| 530 |
|
---|
| 531 | static int forkexec(struct op *t, int *pin, int *pout, int act, char **wp);
|
---|
| 532 | static int iosetup(struct ioword *iop, int pipein, int pipeout);
|
---|
| 533 | static void brkset(struct brkcon *bc);
|
---|
| 534 | static int dolabel(struct op *t);
|
---|
| 535 | static int dohelp(struct op *t);
|
---|
| 536 | static int dochdir(struct op *t);
|
---|
| 537 | static int doshift(struct op *t);
|
---|
| 538 | static int dologin(struct op *t);
|
---|
| 539 | static int doumask(struct op *t);
|
---|
| 540 | static int doexec(struct op *t);
|
---|
| 541 | static int dodot(struct op *t);
|
---|
| 542 | static int dowait(struct op *t);
|
---|
| 543 | static int doread(struct op *t);
|
---|
| 544 | static int doeval(struct op *t);
|
---|
| 545 | static int dotrap(struct op *t);
|
---|
| 546 | static int getsig(char *s);
|
---|
| 547 | static void setsig(int n, sighandler_t f);
|
---|
| 548 | static int getn(char *as);
|
---|
| 549 | static int dobreak(struct op *t);
|
---|
| 550 | static int docontinue(struct op *t);
|
---|
| 551 | static int brkcontin(char *cp, int val);
|
---|
| 552 | static int doexit(struct op *t);
|
---|
| 553 | static int doexport(struct op *t);
|
---|
| 554 | static int doreadonly(struct op *t);
|
---|
| 555 | static void rdexp(char **wp, void (*f) (struct var *), int key);
|
---|
| 556 | static void badid(char *s);
|
---|
| 557 | static int doset(struct op *t);
|
---|
| 558 | static void varput(char *s, int out);
|
---|
| 559 | static int dotimes(struct op *t);
|
---|
[1770] | 560 | static int expand(const char *cp, struct wdblock **wbp, int f);
|
---|
[821] | 561 | static char *blank(int f);
|
---|
| 562 | static int dollar(int quoted);
|
---|
| 563 | static int grave(int quoted);
|
---|
| 564 | static void globname(char *we, char *pp);
|
---|
| 565 | static char *generate(char *start1, char *end1, char *middle, char *end);
|
---|
| 566 | static int anyspcl(struct wdblock *wb);
|
---|
| 567 | static int xstrcmp(char *p1, char *p2);
|
---|
[1770] | 568 | static void glob0(char *a0, unsigned a1, int a2,
|
---|
[821] | 569 | int (*a3) (char *, char *));
|
---|
| 570 | static void readhere(char **name, char *s, int ec);
|
---|
| 571 | static int xxchar(struct ioarg *ap);
|
---|
| 572 |
|
---|
| 573 | struct here {
|
---|
| 574 | char *h_tag;
|
---|
| 575 | int h_dosub;
|
---|
| 576 | struct ioword *h_iop;
|
---|
| 577 | struct here *h_next;
|
---|
| 578 | };
|
---|
| 579 |
|
---|
[1770] | 580 | static const char *const signame[] = {
|
---|
[821] | 581 | "Signal 0",
|
---|
| 582 | "Hangup",
|
---|
[1770] | 583 | NULL, /* interrupt */
|
---|
[821] | 584 | "Quit",
|
---|
| 585 | "Illegal instruction",
|
---|
| 586 | "Trace/BPT trap",
|
---|
| 587 | "Abort",
|
---|
| 588 | "Bus error",
|
---|
| 589 | "Floating Point Exception",
|
---|
| 590 | "Killed",
|
---|
| 591 | "SIGUSR1",
|
---|
| 592 | "SIGSEGV",
|
---|
| 593 | "SIGUSR2",
|
---|
[1770] | 594 | NULL, /* broken pipe */
|
---|
[821] | 595 | "Alarm clock",
|
---|
[1770] | 596 | "Terminated"
|
---|
[821] | 597 | };
|
---|
| 598 |
|
---|
| 599 |
|
---|
| 600 | struct res {
|
---|
| 601 | const char *r_name;
|
---|
| 602 | int r_val;
|
---|
| 603 | };
|
---|
| 604 | static const struct res restab[] = {
|
---|
[1770] | 605 | { "for" , FOR },
|
---|
| 606 | { "case" , CASE },
|
---|
| 607 | { "esac" , ESAC },
|
---|
| 608 | { "while", WHILE },
|
---|
| 609 | { "do" , DO },
|
---|
| 610 | { "done" , DONE },
|
---|
| 611 | { "if" , IF },
|
---|
| 612 | { "in" , IN },
|
---|
| 613 | { "then" , THEN },
|
---|
| 614 | { "else" , ELSE },
|
---|
| 615 | { "elif" , ELIF },
|
---|
| 616 | { "until", UNTIL },
|
---|
| 617 | { "fi" , FI },
|
---|
| 618 | { ";;" , BREAK },
|
---|
| 619 | { "||" , LOGOR },
|
---|
| 620 | { "&&" , LOGAND },
|
---|
| 621 | { "{" , '{' },
|
---|
| 622 | { "}" , '}' },
|
---|
| 623 | { "." , DOT },
|
---|
| 624 | { NULL , 0 },
|
---|
[821] | 625 | };
|
---|
| 626 |
|
---|
| 627 | struct builtincmd {
|
---|
| 628 | const char *name;
|
---|
[1770] | 629 | int (*builtinfunc)(struct op *t);
|
---|
[821] | 630 | };
|
---|
| 631 | static const struct builtincmd builtincmds[] = {
|
---|
[1770] | 632 | { "." , dodot },
|
---|
| 633 | { ":" , dolabel },
|
---|
| 634 | { "break" , dobreak },
|
---|
| 635 | { "cd" , dochdir },
|
---|
| 636 | { "continue", docontinue },
|
---|
| 637 | { "eval" , doeval },
|
---|
| 638 | { "exec" , doexec },
|
---|
| 639 | { "exit" , doexit },
|
---|
| 640 | { "export" , doexport },
|
---|
| 641 | { "help" , dohelp },
|
---|
| 642 | { "login" , dologin },
|
---|
| 643 | { "newgrp" , dologin },
|
---|
| 644 | { "read" , doread },
|
---|
| 645 | { "readonly", doreadonly },
|
---|
| 646 | { "set" , doset },
|
---|
| 647 | { "shift" , doshift },
|
---|
| 648 | { "times" , dotimes },
|
---|
| 649 | { "trap" , dotrap },
|
---|
| 650 | { "umask" , doumask },
|
---|
| 651 | { "wait" , dowait },
|
---|
| 652 | { NULL , NULL },
|
---|
[821] | 653 | };
|
---|
| 654 |
|
---|
| 655 | static struct op *scantree(struct op *);
|
---|
| 656 | static struct op *dowholefile(int, int);
|
---|
| 657 |
|
---|
[1770] | 658 |
|
---|
[821] | 659 | /* Globals */
|
---|
| 660 | static char **dolv;
|
---|
| 661 | static int dolc;
|
---|
| 662 | static int exstat;
|
---|
| 663 | static char gflg;
|
---|
| 664 | static int interactive; /* Is this an interactive shell */
|
---|
| 665 | static int execflg;
|
---|
| 666 | static int multiline; /* \n changed to ; */
|
---|
| 667 | static struct op *outtree; /* result from parser */
|
---|
| 668 | static xint *failpt;
|
---|
| 669 | static xint *errpt;
|
---|
| 670 | static struct brkcon *brklist;
|
---|
| 671 | static int isbreak;
|
---|
| 672 | static struct wdblock *wdlist;
|
---|
| 673 | static struct wdblock *iolist;
|
---|
| 674 |
|
---|
| 675 | #ifdef MSHDEBUG
|
---|
| 676 | static struct var *mshdbg_var;
|
---|
| 677 | #endif
|
---|
| 678 | static struct var *vlist; /* dictionary */
|
---|
| 679 | static struct var *homedir; /* home directory */
|
---|
| 680 | static struct var *prompt; /* main prompt */
|
---|
| 681 | static struct var *cprompt; /* continuation prompt */
|
---|
| 682 | static struct var *path; /* search path for commands */
|
---|
| 683 | static struct var *shell; /* shell to interpret command files */
|
---|
| 684 | static struct var *ifs; /* field separators */
|
---|
| 685 |
|
---|
[1770] | 686 | static int areanum; /* current allocation area */
|
---|
| 687 | static int intr; /* interrupt pending */
|
---|
[821] | 688 | static int inparse;
|
---|
[1770] | 689 | static char *null = (char*)""; /* null value for variable */
|
---|
| 690 | static int heedint = 1; /* heed interrupt signals */
|
---|
| 691 | static void (*qflag)(int) = SIG_IGN;
|
---|
[821] | 692 | static int startl;
|
---|
| 693 | static int peeksym;
|
---|
| 694 | static int nlseen;
|
---|
| 695 | static int iounit = IODEFAULT;
|
---|
| 696 | static YYSTYPE yylval;
|
---|
[1770] | 697 | static char *elinep; /* done in main(): = line + sizeof(line) - 5 */
|
---|
[821] | 698 |
|
---|
[1770] | 699 | static struct here *inhere; /* list of hear docs while parsing */
|
---|
| 700 | static struct here *acthere; /* list of active here documents */
|
---|
| 701 | static struct region *areabot; /* bottom of area */
|
---|
| 702 | static struct region *areatop; /* top of area */
|
---|
| 703 | static struct region *areanxt; /* starting point of scan */
|
---|
[821] | 704 | static void *brktop;
|
---|
| 705 | static void *brkaddr;
|
---|
| 706 |
|
---|
[1770] | 707 | /*
|
---|
| 708 | * parsing & execution environment
|
---|
| 709 | */
|
---|
| 710 | struct env {
|
---|
| 711 | char *linep;
|
---|
| 712 | struct io *iobase;
|
---|
| 713 | struct io *iop;
|
---|
| 714 | xint *errpt; /* void * */
|
---|
| 715 | int iofd;
|
---|
| 716 | struct env *oenv;
|
---|
| 717 | };
|
---|
| 718 |
|
---|
[821] | 719 | static struct env e = {
|
---|
[1770] | 720 | NULL /* set to line in main() */, /* linep: char ptr */
|
---|
| 721 | iostack, /* iobase: struct io ptr */
|
---|
| 722 | iostack - 1, /* iop: struct io ptr */
|
---|
| 723 | (xint *) NULL, /* errpt: void ptr for errors? */
|
---|
| 724 | FDBASE, /* iofd: file desc */
|
---|
| 725 | (struct env *) NULL /* oenv: struct env ptr */
|
---|
[821] | 726 | };
|
---|
| 727 |
|
---|
[1770] | 728 |
|
---|
| 729 | struct globals {
|
---|
| 730 | char ourtrap[_NSIG + 1];
|
---|
| 731 | char *trap[_NSIG + 1];
|
---|
| 732 | struct iobuf sharedbuf; /* in main(): set to { AFID_NOBUF } */
|
---|
| 733 | struct iobuf mainbuf; /* in main(): set to { AFID_NOBUF } */
|
---|
| 734 | struct ioarg ioargstack[NPUSH];
|
---|
| 735 | char filechar_cmdbuf[BUFSIZ];
|
---|
| 736 | char line[LINELIM];
|
---|
| 737 | char child_cmd[LINELIM];
|
---|
| 738 | };
|
---|
| 739 |
|
---|
| 740 | #define G (*ptr_to_globals)
|
---|
| 741 | #define ourtrap (G.ourtrap )
|
---|
| 742 | #define trap (G.trap )
|
---|
| 743 | #define sharedbuf (G.sharedbuf )
|
---|
| 744 | #define mainbuf (G.mainbuf )
|
---|
| 745 | #define ioargstack (G.ioargstack )
|
---|
| 746 | #define filechar_cmdbuf (G.filechar_cmdbuf)
|
---|
| 747 | #define line (G.line )
|
---|
| 748 | #define child_cmd (G.child_cmd )
|
---|
| 749 |
|
---|
| 750 |
|
---|
[821] | 751 | #ifdef MSHDEBUG
|
---|
| 752 | void print_t(struct op *t)
|
---|
| 753 | {
|
---|
| 754 | DBGPRINTF(("T: t=%p, type %s, words=%p, IOword=%p\n", t,
|
---|
| 755 | T_CMD_NAMES[t->type], t->words, t->ioact));
|
---|
| 756 |
|
---|
| 757 | if (t->words) {
|
---|
| 758 | DBGPRINTF(("T: W1: %s", t->words[0]));
|
---|
| 759 | }
|
---|
| 760 | }
|
---|
| 761 |
|
---|
| 762 | void print_tree(struct op *head)
|
---|
| 763 | {
|
---|
| 764 | if (head == NULL) {
|
---|
| 765 | DBGPRINTF(("PRINT_TREE: no tree\n"));
|
---|
| 766 | return;
|
---|
| 767 | }
|
---|
| 768 |
|
---|
| 769 | DBGPRINTF(("NODE: %p, left %p, right %p\n", head, head->left,
|
---|
| 770 | head->right));
|
---|
| 771 |
|
---|
| 772 | if (head->left)
|
---|
| 773 | print_tree(head->left);
|
---|
| 774 |
|
---|
| 775 | if (head->right)
|
---|
| 776 | print_tree(head->right);
|
---|
| 777 | }
|
---|
[1770] | 778 | #endif /* MSHDEBUG */
|
---|
[821] | 779 |
|
---|
| 780 |
|
---|
| 781 | /*
|
---|
[1770] | 782 | * IO functions
|
---|
[821] | 783 | */
|
---|
[1770] | 784 | static void prs(const char *s)
|
---|
[821] | 785 | {
|
---|
[1770] | 786 | if (*s)
|
---|
| 787 | write(2, s, strlen(s));
|
---|
[821] | 788 | }
|
---|
| 789 |
|
---|
[1770] | 790 | static void prn(unsigned u)
|
---|
[821] | 791 | {
|
---|
[1770] | 792 | prs(itoa(u));
|
---|
[821] | 793 | }
|
---|
| 794 |
|
---|
[1770] | 795 | static void echo(char **wp)
|
---|
[821] | 796 | {
|
---|
[1770] | 797 | int i;
|
---|
[821] | 798 |
|
---|
[1770] | 799 | prs("+");
|
---|
| 800 | for (i = 0; wp[i]; i++) {
|
---|
| 801 | if (i)
|
---|
| 802 | prs(" ");
|
---|
| 803 | prs(wp[i]);
|
---|
| 804 | }
|
---|
| 805 | prs("\n");
|
---|
[821] | 806 | }
|
---|
| 807 |
|
---|
[1770] | 808 | static void closef(int i)
|
---|
[821] | 809 | {
|
---|
[1770] | 810 | if (i > 2)
|
---|
| 811 | close(i);
|
---|
[821] | 812 | }
|
---|
| 813 |
|
---|
[1770] | 814 | static void closeall(void)
|
---|
[821] | 815 | {
|
---|
[1770] | 816 | int u;
|
---|
[821] | 817 |
|
---|
[1770] | 818 | for (u = NUFILE; u < NOFILE;)
|
---|
| 819 | close(u++);
|
---|
| 820 | }
|
---|
[821] | 821 |
|
---|
| 822 |
|
---|
[1770] | 823 | /* fail but return to process next command */
|
---|
| 824 | static void fail(void) ATTRIBUTE_NORETURN;
|
---|
[821] | 825 | static void fail(void)
|
---|
| 826 | {
|
---|
| 827 | longjmp(failpt, 1);
|
---|
| 828 | /* NOTREACHED */
|
---|
| 829 | }
|
---|
| 830 |
|
---|
[1770] | 831 | /* abort shell (or fail in subshell) */
|
---|
| 832 | static void leave(void) ATTRIBUTE_NORETURN;
|
---|
[821] | 833 | static void leave(void)
|
---|
| 834 | {
|
---|
| 835 | DBGPRINTF(("LEAVE: leave called!\n"));
|
---|
| 836 |
|
---|
| 837 | if (execflg)
|
---|
| 838 | fail();
|
---|
| 839 | scraphere();
|
---|
| 840 | freehere(1);
|
---|
| 841 | runtrap(0);
|
---|
| 842 | _exit(exstat);
|
---|
| 843 | /* NOTREACHED */
|
---|
| 844 | }
|
---|
| 845 |
|
---|
[1770] | 846 | static void warn(const char *s)
|
---|
[821] | 847 | {
|
---|
| 848 | if (*s) {
|
---|
| 849 | prs(s);
|
---|
| 850 | exstat = -1;
|
---|
| 851 | }
|
---|
| 852 | prs("\n");
|
---|
[1770] | 853 | if (FLAG['e'])
|
---|
[821] | 854 | leave();
|
---|
| 855 | }
|
---|
| 856 |
|
---|
[1770] | 857 | static void err(const char *s)
|
---|
[821] | 858 | {
|
---|
| 859 | warn(s);
|
---|
[1770] | 860 | if (FLAG['n'])
|
---|
[821] | 861 | return;
|
---|
| 862 | if (!interactive)
|
---|
| 863 | leave();
|
---|
| 864 | if (e.errpt)
|
---|
| 865 | longjmp(e.errpt, 1);
|
---|
| 866 | closeall();
|
---|
| 867 | e.iop = e.iobase = iostack;
|
---|
| 868 | }
|
---|
| 869 |
|
---|
| 870 |
|
---|
[1770] | 871 | /* -------- area.c -------- */
|
---|
[821] | 872 |
|
---|
[1770] | 873 | /*
|
---|
| 874 | * All memory between (char *)areabot and (char *)(areatop+1) is
|
---|
| 875 | * exclusively administered by the area management routines.
|
---|
| 876 | * It is assumed that sbrk() and brk() manipulate the high end.
|
---|
| 877 | */
|
---|
[821] | 878 |
|
---|
[1770] | 879 | #define sbrk(X) ({ \
|
---|
| 880 | void * __q = (void *)-1; \
|
---|
| 881 | if (brkaddr + (int)(X) < brktop) { \
|
---|
| 882 | __q = brkaddr; \
|
---|
| 883 | brkaddr += (int)(X); \
|
---|
| 884 | } \
|
---|
| 885 | __q; \
|
---|
| 886 | })
|
---|
[821] | 887 |
|
---|
[1770] | 888 | static void initarea(void)
|
---|
| 889 | {
|
---|
| 890 | brkaddr = xmalloc(AREASIZE);
|
---|
| 891 | brktop = brkaddr + AREASIZE;
|
---|
| 892 |
|
---|
| 893 | while ((long) sbrk(0) & ALIGN)
|
---|
| 894 | sbrk(1);
|
---|
| 895 | areabot = (struct region *) sbrk(REGSIZE);
|
---|
| 896 |
|
---|
| 897 | areabot->next = areabot;
|
---|
| 898 | areabot->area = BUSY;
|
---|
| 899 | areatop = areabot;
|
---|
| 900 | areanxt = areabot;
|
---|
[821] | 901 | }
|
---|
| 902 |
|
---|
[1770] | 903 | static char *getcell(unsigned nbytes)
|
---|
[821] | 904 | {
|
---|
[1770] | 905 | int nregio;
|
---|
| 906 | struct region *p, *q;
|
---|
| 907 | int i;
|
---|
[821] | 908 |
|
---|
[1770] | 909 | if (nbytes == 0) {
|
---|
| 910 | puts("getcell(0)");
|
---|
| 911 | abort();
|
---|
[821] | 912 | }
|
---|
[1770] | 913 | /* silly and defeats the algorithm */
|
---|
| 914 | /*
|
---|
| 915 | * round upwards and add administration area
|
---|
| 916 | */
|
---|
| 917 | nregio = (nbytes + (REGSIZE - 1)) / REGSIZE + 1;
|
---|
| 918 | p = areanxt;
|
---|
| 919 | for (;;) {
|
---|
| 920 | if (p->area > areanum) {
|
---|
| 921 | /*
|
---|
| 922 | * merge free cells
|
---|
| 923 | */
|
---|
| 924 | while ((q = p->next)->area > areanum && q != areanxt)
|
---|
| 925 | p->next = q->next;
|
---|
| 926 | /*
|
---|
| 927 | * exit loop if cell big enough
|
---|
| 928 | */
|
---|
| 929 | if (q >= p + nregio)
|
---|
| 930 | goto found;
|
---|
| 931 | }
|
---|
| 932 | p = p->next;
|
---|
| 933 | if (p == areanxt)
|
---|
| 934 | break;
|
---|
| 935 | }
|
---|
| 936 | i = nregio >= GROWBY ? nregio : GROWBY;
|
---|
| 937 | p = (struct region *) sbrk(i * REGSIZE);
|
---|
| 938 | if (p == (struct region *) -1)
|
---|
| 939 | return NULL;
|
---|
| 940 | p--;
|
---|
| 941 | if (p != areatop) {
|
---|
| 942 | puts("not contig");
|
---|
| 943 | abort(); /* allocated areas are contiguous */
|
---|
| 944 | }
|
---|
| 945 | q = p + i;
|
---|
| 946 | p->next = q;
|
---|
| 947 | p->area = FREE;
|
---|
| 948 | q->next = areabot;
|
---|
| 949 | q->area = BUSY;
|
---|
| 950 | areatop = q;
|
---|
| 951 | found:
|
---|
| 952 | /*
|
---|
| 953 | * we found a FREE area big enough, pointed to by 'p', and up to 'q'
|
---|
| 954 | */
|
---|
| 955 | areanxt = p + nregio;
|
---|
| 956 | if (areanxt < q) {
|
---|
| 957 | /*
|
---|
| 958 | * split into requested area and rest
|
---|
| 959 | */
|
---|
| 960 | if (areanxt + 1 > q) {
|
---|
| 961 | puts("OOM");
|
---|
| 962 | abort(); /* insufficient space left for admin */
|
---|
| 963 | }
|
---|
| 964 | areanxt->next = q;
|
---|
| 965 | areanxt->area = FREE;
|
---|
| 966 | p->next = areanxt;
|
---|
| 967 | }
|
---|
| 968 | p->area = areanum;
|
---|
| 969 | return (char *) (p + 1);
|
---|
[821] | 970 | }
|
---|
| 971 |
|
---|
[1770] | 972 | static void freecell(char *cp)
|
---|
[821] | 973 | {
|
---|
[1770] | 974 | struct region *p;
|
---|
| 975 |
|
---|
| 976 | p = (struct region *) cp;
|
---|
| 977 | if (p != NULL) {
|
---|
| 978 | p--;
|
---|
| 979 | if (p < areanxt)
|
---|
| 980 | areanxt = p;
|
---|
| 981 | p->area = FREE;
|
---|
| 982 | }
|
---|
[821] | 983 | }
|
---|
[1770] | 984 | #define DELETE(obj) freecell((char *)obj)
|
---|
[821] | 985 |
|
---|
[1770] | 986 | static void freearea(int a)
|
---|
[821] | 987 | {
|
---|
[1770] | 988 | struct region *p, *top;
|
---|
[821] | 989 |
|
---|
[1770] | 990 | top = areatop;
|
---|
| 991 | for (p = areabot; p != top; p = p->next)
|
---|
| 992 | if (p->area >= a)
|
---|
| 993 | p->area = FREE;
|
---|
[821] | 994 | }
|
---|
| 995 |
|
---|
[1770] | 996 | static void setarea(char *cp, int a)
|
---|
[821] | 997 | {
|
---|
[1770] | 998 | struct region *p;
|
---|
[821] | 999 |
|
---|
[1770] | 1000 | p = (struct region *) cp;
|
---|
| 1001 | if (p != NULL)
|
---|
| 1002 | (p - 1)->area = a;
|
---|
[821] | 1003 | }
|
---|
| 1004 |
|
---|
[1770] | 1005 | static int getarea(char *cp)
|
---|
[821] | 1006 | {
|
---|
[1770] | 1007 | return ((struct region *) cp - 1)->area;
|
---|
[821] | 1008 | }
|
---|
| 1009 |
|
---|
[1770] | 1010 | static void garbage(void)
|
---|
[821] | 1011 | {
|
---|
[1770] | 1012 | struct region *p, *q, *top;
|
---|
| 1013 |
|
---|
| 1014 | top = areatop;
|
---|
| 1015 | for (p = areabot; p != top; p = p->next) {
|
---|
| 1016 | if (p->area > areanum) {
|
---|
| 1017 | while ((q = p->next)->area > areanum)
|
---|
| 1018 | p->next = q->next;
|
---|
| 1019 | areanxt = p;
|
---|
[821] | 1020 | }
|
---|
| 1021 | }
|
---|
[1770] | 1022 | #ifdef SHRINKBY
|
---|
| 1023 | if (areatop >= q + SHRINKBY && q->area > areanum) {
|
---|
| 1024 | brk((char *) (q + 1));
|
---|
| 1025 | q->next = areabot;
|
---|
| 1026 | q->area = BUSY;
|
---|
| 1027 | areatop = q;
|
---|
| 1028 | }
|
---|
| 1029 | #endif
|
---|
[821] | 1030 | }
|
---|
| 1031 |
|
---|
| 1032 | static char *space(int n)
|
---|
| 1033 | {
|
---|
[1770] | 1034 | char *cp;
|
---|
[821] | 1035 |
|
---|
[1770] | 1036 | cp = getcell(n);
|
---|
| 1037 | if (cp == NULL)
|
---|
[821] | 1038 | err("out of string space");
|
---|
[1770] | 1039 | return cp;
|
---|
[821] | 1040 | }
|
---|
| 1041 |
|
---|
[1770] | 1042 | static char *strsave(const char *s, int a)
|
---|
[821] | 1043 | {
|
---|
[1770] | 1044 | char *cp;
|
---|
[821] | 1045 |
|
---|
[1770] | 1046 | cp = space(strlen(s) + 1);
|
---|
| 1047 | if (cp == NULL) {
|
---|
| 1048 | // FIXME: I highly doubt this is good.
|
---|
| 1049 | return (char*)"";
|
---|
[821] | 1050 | }
|
---|
[1770] | 1051 | setarea(cp, a);
|
---|
| 1052 | strcpy(cp, s);
|
---|
| 1053 | return cp;
|
---|
[821] | 1054 | }
|
---|
| 1055 |
|
---|
[1770] | 1056 |
|
---|
| 1057 | /* -------- var.c -------- */
|
---|
| 1058 |
|
---|
| 1059 | static int eqname(const char *n1, const char *n2)
|
---|
[821] | 1060 | {
|
---|
[1770] | 1061 | for (; *n1 != '=' && *n1 != '\0'; n1++)
|
---|
| 1062 | if (*n2++ != *n1)
|
---|
| 1063 | return 0;
|
---|
| 1064 | return *n2 == '\0' || *n2 == '=';
|
---|
[821] | 1065 | }
|
---|
| 1066 |
|
---|
[1770] | 1067 | static const char *findeq(const char *cp)
|
---|
[821] | 1068 | {
|
---|
[1770] | 1069 | while (*cp != '\0' && *cp != '=')
|
---|
| 1070 | cp++;
|
---|
| 1071 | return cp;
|
---|
[821] | 1072 | }
|
---|
| 1073 |
|
---|
| 1074 | /*
|
---|
| 1075 | * Find the given name in the dictionary
|
---|
| 1076 | * and return its value. If the name was
|
---|
| 1077 | * not previously there, enter it now and
|
---|
| 1078 | * return a null value.
|
---|
| 1079 | */
|
---|
[1770] | 1080 | static struct var *lookup(const char *n)
|
---|
[821] | 1081 | {
|
---|
[1770] | 1082 | // FIXME: dirty hack
|
---|
[821] | 1083 | static struct var dummy;
|
---|
| 1084 |
|
---|
[1770] | 1085 | struct var *vp;
|
---|
| 1086 | const char *cp;
|
---|
| 1087 | char *xp;
|
---|
| 1088 | int c;
|
---|
| 1089 |
|
---|
[821] | 1090 | if (isdigit(*n)) {
|
---|
[1770] | 1091 | dummy.name = (char*)n;
|
---|
[821] | 1092 | for (c = 0; isdigit(*n) && c < 1000; n++)
|
---|
| 1093 | c = c * 10 + *n - '0';
|
---|
| 1094 | dummy.status = RONLY;
|
---|
[1770] | 1095 | dummy.value = (c <= dolc ? dolv[c] : null);
|
---|
| 1096 | return &dummy;
|
---|
[821] | 1097 | }
|
---|
[1770] | 1098 |
|
---|
[821] | 1099 | for (vp = vlist; vp; vp = vp->next)
|
---|
| 1100 | if (eqname(vp->name, n))
|
---|
[1770] | 1101 | return vp;
|
---|
| 1102 |
|
---|
[821] | 1103 | cp = findeq(n);
|
---|
| 1104 | vp = (struct var *) space(sizeof(*vp));
|
---|
| 1105 | if (vp == 0 || (vp->name = space((int) (cp - n) + 2)) == 0) {
|
---|
[1770] | 1106 | dummy.name = dummy.value = (char*)"";
|
---|
| 1107 | return &dummy;
|
---|
[821] | 1108 | }
|
---|
[1770] | 1109 |
|
---|
| 1110 | xp = vp->name;
|
---|
| 1111 | while ((*xp = *n++) != '\0' && *xp != '=')
|
---|
| 1112 | xp++;
|
---|
| 1113 | *xp++ = '=';
|
---|
| 1114 | *xp = '\0';
|
---|
[821] | 1115 | setarea((char *) vp, 0);
|
---|
| 1116 | setarea((char *) vp->name, 0);
|
---|
| 1117 | vp->value = null;
|
---|
| 1118 | vp->next = vlist;
|
---|
| 1119 | vp->status = GETCELL;
|
---|
| 1120 | vlist = vp;
|
---|
[1770] | 1121 | return vp;
|
---|
[821] | 1122 | }
|
---|
| 1123 |
|
---|
| 1124 | /*
|
---|
| 1125 | * if name is not NULL, it must be
|
---|
| 1126 | * a prefix of the space `val',
|
---|
| 1127 | * and end with `='.
|
---|
| 1128 | * this is all so that exporting
|
---|
| 1129 | * values is reasonably painless.
|
---|
| 1130 | */
|
---|
[1770] | 1131 | static void nameval(struct var *vp, const char *val, const char *name)
|
---|
[821] | 1132 | {
|
---|
[1770] | 1133 | const char *cp;
|
---|
| 1134 | char *xp;
|
---|
[821] | 1135 | int fl;
|
---|
| 1136 |
|
---|
| 1137 | if (vp->status & RONLY) {
|
---|
[1770] | 1138 | xp = vp->name;
|
---|
| 1139 | while (*xp && *xp != '=')
|
---|
[821] | 1140 | putc(*xp++, stderr);
|
---|
| 1141 | err(" is read-only");
|
---|
| 1142 | return;
|
---|
| 1143 | }
|
---|
| 1144 | fl = 0;
|
---|
| 1145 | if (name == NULL) {
|
---|
| 1146 | xp = space(strlen(vp->name) + strlen(val) + 2);
|
---|
[1770] | 1147 | if (xp == NULL)
|
---|
[821] | 1148 | return;
|
---|
[1770] | 1149 | /* make string: name=value */
|
---|
| 1150 | setarea(xp, 0);
|
---|
[821] | 1151 | name = xp;
|
---|
[1770] | 1152 | cp = vp->name;
|
---|
| 1153 | while ((*xp = *cp++) != '\0' && *xp != '=')
|
---|
| 1154 | xp++;
|
---|
| 1155 | *xp++ = '=';
|
---|
| 1156 | strcpy(xp, val);
|
---|
| 1157 | val = xp;
|
---|
[821] | 1158 | fl = GETCELL;
|
---|
| 1159 | }
|
---|
| 1160 | if (vp->status & GETCELL)
|
---|
| 1161 | freecell(vp->name); /* form new string `name=value' */
|
---|
[1770] | 1162 | vp->name = (char*)name;
|
---|
| 1163 | vp->value = (char*)val;
|
---|
[821] | 1164 | vp->status |= fl;
|
---|
| 1165 | }
|
---|
| 1166 |
|
---|
[1770] | 1167 | /*
|
---|
| 1168 | * give variable at `vp' the value `val'.
|
---|
| 1169 | */
|
---|
| 1170 | static void setval(struct var *vp, const char *val)
|
---|
| 1171 | {
|
---|
| 1172 | nameval(vp, val, NULL);
|
---|
| 1173 | }
|
---|
| 1174 |
|
---|
[821] | 1175 | static void export(struct var *vp)
|
---|
| 1176 | {
|
---|
| 1177 | vp->status |= EXPORT;
|
---|
| 1178 | }
|
---|
| 1179 |
|
---|
| 1180 | static void ronly(struct var *vp)
|
---|
| 1181 | {
|
---|
| 1182 | if (isalpha(vp->name[0]) || vp->name[0] == '_') /* not an internal symbol */
|
---|
| 1183 | vp->status |= RONLY;
|
---|
| 1184 | }
|
---|
| 1185 |
|
---|
[1770] | 1186 | static int isassign(const char *s)
|
---|
[821] | 1187 | {
|
---|
[1770] | 1188 | unsigned char c;
|
---|
[821] | 1189 | DBGPRINTF7(("ISASSIGN: enter, s=%s\n", s));
|
---|
| 1190 |
|
---|
[1770] | 1191 | c = *s;
|
---|
| 1192 | /* no isalpha() - we shouldn't use locale */
|
---|
| 1193 | /* c | 0x20 - lowercase (Latin) letters */
|
---|
| 1194 | if (c != '_' && (unsigned)((c|0x20) - 'a') > 25)
|
---|
| 1195 | /* not letter */
|
---|
| 1196 | return 0;
|
---|
[821] | 1197 |
|
---|
[1770] | 1198 | while (1) {
|
---|
| 1199 | c = *++s;
|
---|
| 1200 | if (c == '=')
|
---|
| 1201 | return 1;
|
---|
| 1202 | if (c == '\0')
|
---|
| 1203 | return 0;
|
---|
| 1204 | if (c != '_'
|
---|
| 1205 | && (unsigned)(c - '0') > 9 /* not number */
|
---|
| 1206 | && (unsigned)((c|0x20) - 'a') > 25 /* not letter */
|
---|
| 1207 | ) {
|
---|
| 1208 | return 0;
|
---|
| 1209 | }
|
---|
| 1210 | }
|
---|
[821] | 1211 | }
|
---|
| 1212 |
|
---|
[1770] | 1213 | static int assign(const char *s, int cf)
|
---|
[821] | 1214 | {
|
---|
[1770] | 1215 | const char *cp;
|
---|
[821] | 1216 | struct var *vp;
|
---|
| 1217 |
|
---|
| 1218 | DBGPRINTF7(("ASSIGN: enter, s=%s, cf=%d\n", s, cf));
|
---|
| 1219 |
|
---|
| 1220 | if (!isalpha(*s) && *s != '_')
|
---|
[1770] | 1221 | return 0;
|
---|
[821] | 1222 | for (cp = s; *cp != '='; cp++)
|
---|
[1770] | 1223 | if (*cp == '\0' || (!isalnum(*cp) && *cp != '_'))
|
---|
| 1224 | return 0;
|
---|
[821] | 1225 | vp = lookup(s);
|
---|
[1770] | 1226 | nameval(vp, ++cp, cf == COPYV ? NULL : s);
|
---|
[821] | 1227 | if (cf != COPYV)
|
---|
| 1228 | vp->status &= ~GETCELL;
|
---|
[1770] | 1229 | return 1;
|
---|
[821] | 1230 | }
|
---|
| 1231 |
|
---|
[1770] | 1232 | static int checkname(char *cp)
|
---|
[821] | 1233 | {
|
---|
| 1234 | DBGPRINTF7(("CHECKNAME: enter, cp=%s\n", cp));
|
---|
| 1235 |
|
---|
| 1236 | if (!isalpha(*cp++) && *(cp - 1) != '_')
|
---|
[1770] | 1237 | return 0;
|
---|
[821] | 1238 | while (*cp)
|
---|
| 1239 | if (!isalnum(*cp++) && *(cp - 1) != '_')
|
---|
[1770] | 1240 | return 0;
|
---|
| 1241 | return 1;
|
---|
[821] | 1242 | }
|
---|
| 1243 |
|
---|
[1770] | 1244 | static void putvlist(int f, int out)
|
---|
[821] | 1245 | {
|
---|
[1770] | 1246 | struct var *vp;
|
---|
[821] | 1247 |
|
---|
[1770] | 1248 | for (vp = vlist; vp; vp = vp->next) {
|
---|
[821] | 1249 | if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) {
|
---|
| 1250 | if (vp->status & EXPORT)
|
---|
| 1251 | write(out, "export ", 7);
|
---|
| 1252 | if (vp->status & RONLY)
|
---|
| 1253 | write(out, "readonly ", 9);
|
---|
| 1254 | write(out, vp->name, (int) (findeq(vp->name) - vp->name));
|
---|
| 1255 | write(out, "\n", 1);
|
---|
| 1256 | }
|
---|
[1770] | 1257 | }
|
---|
[821] | 1258 | }
|
---|
| 1259 |
|
---|
[1770] | 1260 |
|
---|
| 1261 | /*
|
---|
| 1262 | * trap handling
|
---|
| 1263 | */
|
---|
| 1264 | static void sig(int i)
|
---|
[821] | 1265 | {
|
---|
[1770] | 1266 | trapset = i;
|
---|
| 1267 | signal(i, sig);
|
---|
[821] | 1268 | }
|
---|
| 1269 |
|
---|
[1770] | 1270 | static void runtrap(int i)
|
---|
[821] | 1271 | {
|
---|
[1770] | 1272 | char *trapstr;
|
---|
| 1273 |
|
---|
| 1274 | trapstr = trap[i];
|
---|
| 1275 | if (trapstr == NULL)
|
---|
| 1276 | return;
|
---|
| 1277 |
|
---|
| 1278 | if (i == 0)
|
---|
| 1279 | trap[i] = NULL;
|
---|
| 1280 |
|
---|
| 1281 | RUN(aword, trapstr, nlchar);
|
---|
[821] | 1282 | }
|
---|
| 1283 |
|
---|
| 1284 |
|
---|
[1770] | 1285 | static void setdash(void)
|
---|
[821] | 1286 | {
|
---|
[1770] | 1287 | char *cp;
|
---|
| 1288 | int c;
|
---|
| 1289 | char m['z' - 'a' + 1];
|
---|
[821] | 1290 |
|
---|
[1770] | 1291 | cp = m;
|
---|
| 1292 | for (c = 'a'; c <= 'z'; c++)
|
---|
| 1293 | if (FLAG[c])
|
---|
| 1294 | *cp++ = c;
|
---|
| 1295 | *cp = '\0';
|
---|
| 1296 | setval(lookup("-"), m);
|
---|
| 1297 | }
|
---|
[821] | 1298 |
|
---|
[1770] | 1299 | static int newfile(char *s)
|
---|
| 1300 | {
|
---|
| 1301 | int f;
|
---|
[821] | 1302 |
|
---|
[1770] | 1303 | DBGPRINTF7(("NEWFILE: opening %s\n", s));
|
---|
[821] | 1304 |
|
---|
[1770] | 1305 | f = 0;
|
---|
| 1306 | if (NOT_LONE_DASH(s)) {
|
---|
| 1307 | DBGPRINTF(("NEWFILE: s is %s\n", s));
|
---|
| 1308 | f = open(s, O_RDONLY);
|
---|
| 1309 | if (f < 0) {
|
---|
| 1310 | prs(s);
|
---|
| 1311 | err(": cannot open");
|
---|
| 1312 | return 1;
|
---|
[821] | 1313 | }
|
---|
| 1314 | }
|
---|
[1770] | 1315 |
|
---|
| 1316 | next(remap(f));
|
---|
| 1317 | return 0;
|
---|
[821] | 1318 | }
|
---|
| 1319 |
|
---|
[1770] | 1320 |
|
---|
| 1321 | struct op *scantree(struct op *head)
|
---|
[821] | 1322 | {
|
---|
[1770] | 1323 | struct op *dotnode;
|
---|
[821] | 1324 |
|
---|
[1770] | 1325 | if (head == NULL)
|
---|
| 1326 | return NULL;
|
---|
[821] | 1327 |
|
---|
[1770] | 1328 | if (head->left != NULL) {
|
---|
| 1329 | dotnode = scantree(head->left);
|
---|
| 1330 | if (dotnode)
|
---|
| 1331 | return dotnode;
|
---|
| 1332 | }
|
---|
[821] | 1333 |
|
---|
[1770] | 1334 | if (head->right != NULL) {
|
---|
| 1335 | dotnode = scantree(head->right);
|
---|
| 1336 | if (dotnode)
|
---|
| 1337 | return dotnode;
|
---|
| 1338 | }
|
---|
[821] | 1339 |
|
---|
[1770] | 1340 | if (head->words == NULL)
|
---|
| 1341 | return NULL;
|
---|
[821] | 1342 |
|
---|
[1770] | 1343 | DBGPRINTF5(("SCANTREE: checking node %p\n", head));
|
---|
[821] | 1344 |
|
---|
[1770] | 1345 | if ((head->type != TDOT) && LONE_CHAR(head->words[0], '.')) {
|
---|
| 1346 | DBGPRINTF5(("SCANTREE: dot found in node %p\n", head));
|
---|
| 1347 | return head;
|
---|
| 1348 | }
|
---|
[821] | 1349 |
|
---|
[1770] | 1350 | return NULL;
|
---|
[821] | 1351 | }
|
---|
| 1352 |
|
---|
[1770] | 1353 |
|
---|
| 1354 | static void onecommand(void)
|
---|
[821] | 1355 | {
|
---|
[1770] | 1356 | int i;
|
---|
| 1357 | jmp_buf m1;
|
---|
[821] | 1358 |
|
---|
[1770] | 1359 | DBGPRINTF(("ONECOMMAND: enter, outtree=%p\n", outtree));
|
---|
| 1360 |
|
---|
| 1361 | while (e.oenv)
|
---|
| 1362 | quitenv();
|
---|
| 1363 |
|
---|
| 1364 | areanum = 1;
|
---|
| 1365 | freehere(areanum);
|
---|
| 1366 | freearea(areanum);
|
---|
| 1367 | garbage();
|
---|
| 1368 | wdlist = 0;
|
---|
| 1369 | iolist = 0;
|
---|
| 1370 | e.errpt = 0;
|
---|
| 1371 | e.linep = line;
|
---|
| 1372 | yynerrs = 0;
|
---|
| 1373 | multiline = 0;
|
---|
| 1374 | inparse = 1;
|
---|
| 1375 | intr = 0;
|
---|
| 1376 | execflg = 0;
|
---|
| 1377 |
|
---|
| 1378 | failpt = m1;
|
---|
| 1379 | setjmp(failpt); /* Bruce Evans' fix */
|
---|
| 1380 | failpt = m1;
|
---|
| 1381 | if (setjmp(failpt) || yyparse() || intr) {
|
---|
| 1382 | DBGPRINTF(("ONECOMMAND: this is not good.\n"));
|
---|
| 1383 |
|
---|
| 1384 | while (e.oenv)
|
---|
| 1385 | quitenv();
|
---|
| 1386 | scraphere();
|
---|
| 1387 | if (!interactive && intr)
|
---|
| 1388 | leave();
|
---|
| 1389 | inparse = 0;
|
---|
| 1390 | intr = 0;
|
---|
| 1391 | return;
|
---|
[821] | 1392 | }
|
---|
[1770] | 1393 |
|
---|
| 1394 | inparse = 0;
|
---|
| 1395 | brklist = 0;
|
---|
| 1396 | intr = 0;
|
---|
| 1397 | execflg = 0;
|
---|
| 1398 |
|
---|
| 1399 | if (!FLAG['n']) {
|
---|
| 1400 | DBGPRINTF(("ONECOMMAND: calling execute, t=outtree=%p\n",
|
---|
| 1401 | outtree));
|
---|
| 1402 | execute(outtree, NOPIPE, NOPIPE, 0);
|
---|
[821] | 1403 | }
|
---|
[1770] | 1404 |
|
---|
| 1405 | if (!interactive && intr) {
|
---|
| 1406 | execflg = 0;
|
---|
| 1407 | leave();
|
---|
[821] | 1408 | }
|
---|
[1770] | 1409 |
|
---|
| 1410 | i = trapset;
|
---|
| 1411 | if (i != 0) {
|
---|
| 1412 | trapset = 0;
|
---|
| 1413 | runtrap(i);
|
---|
[821] | 1414 | }
|
---|
| 1415 | }
|
---|
| 1416 |
|
---|
[1770] | 1417 | static int newenv(int f)
|
---|
[821] | 1418 | {
|
---|
[1770] | 1419 | struct env *ep;
|
---|
[821] | 1420 |
|
---|
[1770] | 1421 | DBGPRINTF(("NEWENV: f=%d (indicates quitenv and return)\n", f));
|
---|
| 1422 |
|
---|
| 1423 | if (f) {
|
---|
| 1424 | quitenv();
|
---|
| 1425 | return 1;
|
---|
[821] | 1426 | }
|
---|
[1770] | 1427 |
|
---|
| 1428 | ep = (struct env *) space(sizeof(*ep));
|
---|
| 1429 | if (ep == NULL) {
|
---|
| 1430 | while (e.oenv)
|
---|
| 1431 | quitenv();
|
---|
| 1432 | fail();
|
---|
| 1433 | }
|
---|
| 1434 | *ep = e;
|
---|
| 1435 | e.oenv = ep;
|
---|
| 1436 | e.errpt = errpt;
|
---|
| 1437 |
|
---|
| 1438 | return 0;
|
---|
[821] | 1439 | }
|
---|
| 1440 |
|
---|
[1770] | 1441 | static void quitenv(void)
|
---|
[821] | 1442 | {
|
---|
[1770] | 1443 | struct env *ep;
|
---|
| 1444 | int fd;
|
---|
[821] | 1445 |
|
---|
[1770] | 1446 | DBGPRINTF(("QUITENV: e.oenv=%p\n", e.oenv));
|
---|
| 1447 |
|
---|
| 1448 | ep = e.oenv;
|
---|
| 1449 | if (ep != NULL) {
|
---|
| 1450 | fd = e.iofd;
|
---|
| 1451 | e = *ep;
|
---|
| 1452 | /* should close `'d files */
|
---|
| 1453 | DELETE(ep);
|
---|
| 1454 | while (--fd >= e.iofd)
|
---|
| 1455 | close(fd);
|
---|
| 1456 | }
|
---|
[821] | 1457 | }
|
---|
| 1458 |
|
---|
[1770] | 1459 | /*
|
---|
| 1460 | * Is character c in s?
|
---|
| 1461 | */
|
---|
| 1462 | static int any(int c, const char *s)
|
---|
[821] | 1463 | {
|
---|
[1770] | 1464 | while (*s)
|
---|
| 1465 | if (*s++ == c)
|
---|
| 1466 | return 1;
|
---|
| 1467 | return 0;
|
---|
| 1468 | }
|
---|
[821] | 1469 |
|
---|
[1770] | 1470 | /*
|
---|
| 1471 | * Is any character from s1 in s2?
|
---|
| 1472 | */
|
---|
| 1473 | static int anys(const char *s1, const char *s2)
|
---|
| 1474 | {
|
---|
| 1475 | while (*s1)
|
---|
| 1476 | if (any(*s1++, s2))
|
---|
| 1477 | return 1;
|
---|
| 1478 | return 0;
|
---|
[821] | 1479 | }
|
---|
| 1480 |
|
---|
[1770] | 1481 | static char *putn(int n)
|
---|
[821] | 1482 | {
|
---|
[1770] | 1483 | return itoa(n);
|
---|
[821] | 1484 | }
|
---|
| 1485 |
|
---|
[1770] | 1486 | static void next(int f)
|
---|
[821] | 1487 | {
|
---|
[1770] | 1488 | PUSHIO(afile, f, filechar);
|
---|
| 1489 | }
|
---|
[821] | 1490 |
|
---|
[1770] | 1491 | static void onintr(int s) /* ANSI C requires a parameter */
|
---|
| 1492 | {
|
---|
| 1493 | signal(SIGINT, onintr);
|
---|
| 1494 | intr = 1;
|
---|
| 1495 | if (interactive) {
|
---|
| 1496 | if (inparse) {
|
---|
| 1497 | prs("\n");
|
---|
| 1498 | fail();
|
---|
[821] | 1499 | }
|
---|
[1770] | 1500 | } else if (heedint) {
|
---|
| 1501 | execflg = 0;
|
---|
| 1502 | leave();
|
---|
[821] | 1503 | }
|
---|
[1770] | 1504 | }
|
---|
| 1505 |
|
---|
| 1506 |
|
---|
| 1507 | /* -------- gmatch.c -------- */
|
---|
| 1508 | /*
|
---|
| 1509 | * int gmatch(string, pattern)
|
---|
| 1510 | * char *string, *pattern;
|
---|
| 1511 | *
|
---|
| 1512 | * Match a pattern as in sh(1).
|
---|
| 1513 | */
|
---|
| 1514 |
|
---|
| 1515 | #define CMASK 0377
|
---|
| 1516 | #define QUOTE 0200
|
---|
| 1517 | #define QMASK (CMASK & ~QUOTE)
|
---|
| 1518 | #define NOT '!' /* might use ^ */
|
---|
| 1519 |
|
---|
| 1520 | static const char *cclass(const char *p, int sub)
|
---|
| 1521 | {
|
---|
| 1522 | int c, d, not, found;
|
---|
| 1523 |
|
---|
| 1524 | not = (*p == NOT);
|
---|
| 1525 | if (not != 0)
|
---|
| 1526 | p++;
|
---|
| 1527 | found = not;
|
---|
| 1528 | do {
|
---|
| 1529 | if (*p == '\0')
|
---|
| 1530 | return NULL;
|
---|
| 1531 | c = *p & CMASK;
|
---|
| 1532 | if (p[1] == '-' && p[2] != ']') {
|
---|
| 1533 | d = p[2] & CMASK;
|
---|
| 1534 | p++;
|
---|
| 1535 | } else
|
---|
| 1536 | d = c;
|
---|
| 1537 | if (c == sub || (c <= sub && sub <= d))
|
---|
| 1538 | found = !not;
|
---|
| 1539 | } while (*++p != ']');
|
---|
| 1540 | return found ? p + 1 : NULL;
|
---|
| 1541 | }
|
---|
| 1542 |
|
---|
| 1543 | static int gmatch(const char *s, const char *p)
|
---|
| 1544 | {
|
---|
| 1545 | int sc, pc;
|
---|
| 1546 |
|
---|
| 1547 | if (s == NULL || p == NULL)
|
---|
| 1548 | return 0;
|
---|
| 1549 |
|
---|
| 1550 | while ((pc = *p++ & CMASK) != '\0') {
|
---|
| 1551 | sc = *s++ & QMASK;
|
---|
| 1552 | switch (pc) {
|
---|
| 1553 | case '[':
|
---|
| 1554 | p = cclass(p, sc);
|
---|
| 1555 | if (p == NULL)
|
---|
| 1556 | return 0;
|
---|
| 1557 | break;
|
---|
| 1558 |
|
---|
| 1559 | case '?':
|
---|
| 1560 | if (sc == 0)
|
---|
| 1561 | return 0;
|
---|
| 1562 | break;
|
---|
| 1563 |
|
---|
| 1564 | case '*':
|
---|
| 1565 | s--;
|
---|
| 1566 | do {
|
---|
| 1567 | if (*p == '\0' || gmatch(s, p))
|
---|
| 1568 | return 1;
|
---|
| 1569 | } while (*s++ != '\0');
|
---|
| 1570 | return 0;
|
---|
| 1571 |
|
---|
| 1572 | default:
|
---|
| 1573 | if (sc != (pc & ~QUOTE))
|
---|
| 1574 | return 0;
|
---|
| 1575 | }
|
---|
[821] | 1576 | }
|
---|
[1770] | 1577 | return *s == '\0';
|
---|
[821] | 1578 | }
|
---|
| 1579 |
|
---|
[1770] | 1580 |
|
---|
[821] | 1581 | /* -------- csyn.c -------- */
|
---|
| 1582 | /*
|
---|
| 1583 | * shell: syntax (C version)
|
---|
| 1584 | */
|
---|
| 1585 |
|
---|
[1770] | 1586 | static void yyerror(const char *s) ATTRIBUTE_NORETURN;
|
---|
| 1587 | static void yyerror(const char *s)
|
---|
| 1588 | {
|
---|
| 1589 | yynerrs++;
|
---|
| 1590 | if (interactive && e.iop <= iostack) {
|
---|
| 1591 | multiline = 0;
|
---|
| 1592 | while (eofc() == 0 && yylex(0) != '\n');
|
---|
| 1593 | }
|
---|
| 1594 | err(s);
|
---|
| 1595 | fail();
|
---|
| 1596 | }
|
---|
| 1597 |
|
---|
| 1598 | static void zzerr(void) ATTRIBUTE_NORETURN;
|
---|
| 1599 | static void zzerr(void)
|
---|
| 1600 | {
|
---|
| 1601 | yyerror("syntax error");
|
---|
| 1602 | }
|
---|
| 1603 |
|
---|
[821] | 1604 | int yyparse(void)
|
---|
| 1605 | {
|
---|
| 1606 | DBGPRINTF7(("YYPARSE: enter...\n"));
|
---|
| 1607 |
|
---|
| 1608 | startl = 1;
|
---|
| 1609 | peeksym = 0;
|
---|
| 1610 | yynerrs = 0;
|
---|
| 1611 | outtree = c_list();
|
---|
| 1612 | musthave('\n', 0);
|
---|
| 1613 | return (yynerrs != 0);
|
---|
| 1614 | }
|
---|
| 1615 |
|
---|
| 1616 | static struct op *pipeline(int cf)
|
---|
| 1617 | {
|
---|
[1770] | 1618 | struct op *t, *p;
|
---|
| 1619 | int c;
|
---|
[821] | 1620 |
|
---|
| 1621 | DBGPRINTF7(("PIPELINE: enter, cf=%d\n", cf));
|
---|
| 1622 |
|
---|
| 1623 | t = command(cf);
|
---|
| 1624 |
|
---|
| 1625 | DBGPRINTF9(("PIPELINE: t=%p\n", t));
|
---|
| 1626 |
|
---|
| 1627 | if (t != NULL) {
|
---|
| 1628 | while ((c = yylex(0)) == '|') {
|
---|
[1770] | 1629 | p = command(CONTIN);
|
---|
| 1630 | if (p == NULL) {
|
---|
[821] | 1631 | DBGPRINTF8(("PIPELINE: error!\n"));
|
---|
[1770] | 1632 | zzerr();
|
---|
[821] | 1633 | }
|
---|
| 1634 |
|
---|
| 1635 | if (t->type != TPAREN && t->type != TCOM) {
|
---|
| 1636 | /* shell statement */
|
---|
| 1637 | t = block(TPAREN, t, NOBLOCK, NOWORDS);
|
---|
| 1638 | }
|
---|
| 1639 |
|
---|
| 1640 | t = block(TPIPE, t, p, NOWORDS);
|
---|
| 1641 | }
|
---|
| 1642 | peeksym = c;
|
---|
| 1643 | }
|
---|
| 1644 |
|
---|
| 1645 | DBGPRINTF7(("PIPELINE: returning t=%p\n", t));
|
---|
[1770] | 1646 | return t;
|
---|
[821] | 1647 | }
|
---|
| 1648 |
|
---|
| 1649 | static struct op *andor(void)
|
---|
| 1650 | {
|
---|
[1770] | 1651 | struct op *t, *p;
|
---|
| 1652 | int c;
|
---|
[821] | 1653 |
|
---|
| 1654 | DBGPRINTF7(("ANDOR: enter...\n"));
|
---|
| 1655 |
|
---|
| 1656 | t = pipeline(0);
|
---|
| 1657 |
|
---|
| 1658 | DBGPRINTF9(("ANDOR: t=%p\n", t));
|
---|
| 1659 |
|
---|
| 1660 | if (t != NULL) {
|
---|
| 1661 | while ((c = yylex(0)) == LOGAND || c == LOGOR) {
|
---|
[1770] | 1662 | p = pipeline(CONTIN);
|
---|
| 1663 | if (p == NULL) {
|
---|
[821] | 1664 | DBGPRINTF8(("ANDOR: error!\n"));
|
---|
[1770] | 1665 | zzerr();
|
---|
[821] | 1666 | }
|
---|
| 1667 |
|
---|
| 1668 | t = block(c == LOGAND ? TAND : TOR, t, p, NOWORDS);
|
---|
| 1669 | } /* WHILE */
|
---|
| 1670 |
|
---|
| 1671 | peeksym = c;
|
---|
| 1672 | }
|
---|
| 1673 |
|
---|
| 1674 | DBGPRINTF7(("ANDOR: returning t=%p\n", t));
|
---|
[1770] | 1675 | return t;
|
---|
[821] | 1676 | }
|
---|
| 1677 |
|
---|
| 1678 | static struct op *c_list(void)
|
---|
| 1679 | {
|
---|
[1770] | 1680 | struct op *t, *p;
|
---|
| 1681 | int c;
|
---|
[821] | 1682 |
|
---|
| 1683 | DBGPRINTF7(("C_LIST: enter...\n"));
|
---|
| 1684 |
|
---|
| 1685 | t = andor();
|
---|
| 1686 |
|
---|
| 1687 | if (t != NULL) {
|
---|
[1770] | 1688 | peeksym = yylex(0);
|
---|
| 1689 | if (peeksym == '&')
|
---|
[821] | 1690 | t = block(TASYNC, t, NOBLOCK, NOWORDS);
|
---|
| 1691 |
|
---|
| 1692 | while ((c = yylex(0)) == ';' || c == '&'
|
---|
| 1693 | || (multiline && c == '\n')) {
|
---|
| 1694 |
|
---|
[1770] | 1695 | p = andor();
|
---|
| 1696 | if (p== NULL)
|
---|
| 1697 | return t;
|
---|
[821] | 1698 |
|
---|
[1770] | 1699 | peeksym = yylex(0);
|
---|
| 1700 | if (peeksym == '&')
|
---|
[821] | 1701 | p = block(TASYNC, p, NOBLOCK, NOWORDS);
|
---|
| 1702 |
|
---|
| 1703 | t = list(t, p);
|
---|
| 1704 | } /* WHILE */
|
---|
| 1705 |
|
---|
| 1706 | peeksym = c;
|
---|
| 1707 | }
|
---|
| 1708 | /* IF */
|
---|
| 1709 | DBGPRINTF7(("C_LIST: returning t=%p\n", t));
|
---|
[1770] | 1710 | return t;
|
---|
[821] | 1711 | }
|
---|
| 1712 |
|
---|
| 1713 | static int synio(int cf)
|
---|
| 1714 | {
|
---|
[1770] | 1715 | struct ioword *iop;
|
---|
| 1716 | int i;
|
---|
| 1717 | int c;
|
---|
[821] | 1718 |
|
---|
| 1719 | DBGPRINTF7(("SYNIO: enter, cf=%d\n", cf));
|
---|
| 1720 |
|
---|
[1770] | 1721 | c = yylex(cf);
|
---|
| 1722 | if (c != '<' && c != '>') {
|
---|
[821] | 1723 | peeksym = c;
|
---|
[1770] | 1724 | return 0;
|
---|
[821] | 1725 | }
|
---|
| 1726 |
|
---|
| 1727 | i = yylval.i;
|
---|
| 1728 | musthave(WORD, 0);
|
---|
| 1729 | iop = io(iounit, i, yylval.cp);
|
---|
| 1730 | iounit = IODEFAULT;
|
---|
| 1731 |
|
---|
| 1732 | if (i & IOHERE)
|
---|
| 1733 | markhere(yylval.cp, iop);
|
---|
| 1734 |
|
---|
| 1735 | DBGPRINTF7(("SYNIO: returning 1\n"));
|
---|
[1770] | 1736 | return 1;
|
---|
[821] | 1737 | }
|
---|
| 1738 |
|
---|
| 1739 | static void musthave(int c, int cf)
|
---|
| 1740 | {
|
---|
[1770] | 1741 | peeksym = yylex(cf);
|
---|
| 1742 | if (peeksym != c) {
|
---|
[821] | 1743 | DBGPRINTF7(("MUSTHAVE: error!\n"));
|
---|
[1770] | 1744 | zzerr();
|
---|
[821] | 1745 | }
|
---|
| 1746 |
|
---|
| 1747 | peeksym = 0;
|
---|
| 1748 | }
|
---|
| 1749 |
|
---|
| 1750 | static struct op *simple(void)
|
---|
| 1751 | {
|
---|
[1770] | 1752 | struct op *t;
|
---|
[821] | 1753 |
|
---|
| 1754 | t = NULL;
|
---|
| 1755 | for (;;) {
|
---|
| 1756 | switch (peeksym = yylex(0)) {
|
---|
| 1757 | case '<':
|
---|
| 1758 | case '>':
|
---|
| 1759 | (void) synio(0);
|
---|
| 1760 | break;
|
---|
| 1761 |
|
---|
| 1762 | case WORD:
|
---|
| 1763 | if (t == NULL) {
|
---|
| 1764 | t = newtp();
|
---|
| 1765 | t->type = TCOM;
|
---|
| 1766 | }
|
---|
| 1767 | peeksym = 0;
|
---|
| 1768 | word(yylval.cp);
|
---|
| 1769 | break;
|
---|
| 1770 |
|
---|
| 1771 | default:
|
---|
[1770] | 1772 | return t;
|
---|
[821] | 1773 | }
|
---|
| 1774 | }
|
---|
| 1775 | }
|
---|
| 1776 |
|
---|
| 1777 | static struct op *nested(int type, int mark)
|
---|
| 1778 | {
|
---|
[1770] | 1779 | struct op *t;
|
---|
[821] | 1780 |
|
---|
| 1781 | DBGPRINTF3(("NESTED: enter, type=%d, mark=%d\n", type, mark));
|
---|
| 1782 |
|
---|
| 1783 | multiline++;
|
---|
| 1784 | t = c_list();
|
---|
| 1785 | musthave(mark, 0);
|
---|
| 1786 | multiline--;
|
---|
[1770] | 1787 | return block(type, t, NOBLOCK, NOWORDS);
|
---|
[821] | 1788 | }
|
---|
| 1789 |
|
---|
| 1790 | static struct op *command(int cf)
|
---|
| 1791 | {
|
---|
[1770] | 1792 | struct op *t;
|
---|
[821] | 1793 | struct wdblock *iosave;
|
---|
[1770] | 1794 | int c;
|
---|
[821] | 1795 |
|
---|
| 1796 | DBGPRINTF(("COMMAND: enter, cf=%d\n", cf));
|
---|
| 1797 |
|
---|
| 1798 | iosave = iolist;
|
---|
| 1799 | iolist = NULL;
|
---|
| 1800 |
|
---|
| 1801 | if (multiline)
|
---|
| 1802 | cf |= CONTIN;
|
---|
| 1803 |
|
---|
| 1804 | while (synio(cf))
|
---|
| 1805 | cf = 0;
|
---|
| 1806 |
|
---|
| 1807 | c = yylex(cf);
|
---|
| 1808 |
|
---|
| 1809 | switch (c) {
|
---|
| 1810 | default:
|
---|
| 1811 | peeksym = c;
|
---|
[1770] | 1812 | t = simple();
|
---|
| 1813 | if (t == NULL) {
|
---|
[821] | 1814 | if (iolist == NULL)
|
---|
[1770] | 1815 | return NULL;
|
---|
[821] | 1816 | t = newtp();
|
---|
| 1817 | t->type = TCOM;
|
---|
| 1818 | }
|
---|
| 1819 | break;
|
---|
| 1820 |
|
---|
| 1821 | case '(':
|
---|
| 1822 | t = nested(TPAREN, ')');
|
---|
| 1823 | break;
|
---|
| 1824 |
|
---|
| 1825 | case '{':
|
---|
| 1826 | t = nested(TBRACE, '}');
|
---|
| 1827 | break;
|
---|
| 1828 |
|
---|
| 1829 | case FOR:
|
---|
| 1830 | t = newtp();
|
---|
| 1831 | t->type = TFOR;
|
---|
| 1832 | musthave(WORD, 0);
|
---|
| 1833 | startl = 1;
|
---|
| 1834 | t->str = yylval.cp;
|
---|
| 1835 | multiline++;
|
---|
| 1836 | t->words = wordlist();
|
---|
[1770] | 1837 | c = yylex(0);
|
---|
| 1838 | if (c != '\n' && c != ';')
|
---|
[821] | 1839 | peeksym = c;
|
---|
| 1840 | t->left = dogroup(0);
|
---|
| 1841 | multiline--;
|
---|
| 1842 | break;
|
---|
| 1843 |
|
---|
| 1844 | case WHILE:
|
---|
| 1845 | case UNTIL:
|
---|
| 1846 | multiline++;
|
---|
| 1847 | t = newtp();
|
---|
| 1848 | t->type = c == WHILE ? TWHILE : TUNTIL;
|
---|
| 1849 | t->left = c_list();
|
---|
| 1850 | t->right = dogroup(1);
|
---|
| 1851 | t->words = NULL;
|
---|
| 1852 | multiline--;
|
---|
| 1853 | break;
|
---|
| 1854 |
|
---|
| 1855 | case CASE:
|
---|
| 1856 | t = newtp();
|
---|
| 1857 | t->type = TCASE;
|
---|
| 1858 | musthave(WORD, 0);
|
---|
| 1859 | t->str = yylval.cp;
|
---|
| 1860 | startl++;
|
---|
| 1861 | multiline++;
|
---|
| 1862 | musthave(IN, CONTIN);
|
---|
| 1863 | startl++;
|
---|
| 1864 |
|
---|
| 1865 | t->left = caselist();
|
---|
| 1866 |
|
---|
| 1867 | musthave(ESAC, 0);
|
---|
| 1868 | multiline--;
|
---|
| 1869 | break;
|
---|
| 1870 |
|
---|
| 1871 | case IF:
|
---|
| 1872 | multiline++;
|
---|
| 1873 | t = newtp();
|
---|
| 1874 | t->type = TIF;
|
---|
| 1875 | t->left = c_list();
|
---|
| 1876 | t->right = thenpart();
|
---|
| 1877 | musthave(FI, 0);
|
---|
| 1878 | multiline--;
|
---|
| 1879 | break;
|
---|
| 1880 |
|
---|
| 1881 | case DOT:
|
---|
| 1882 | t = newtp();
|
---|
| 1883 | t->type = TDOT;
|
---|
| 1884 |
|
---|
| 1885 | musthave(WORD, 0); /* gets name of file */
|
---|
| 1886 | DBGPRINTF7(("COMMAND: DOT clause, yylval.cp is %s\n", yylval.cp));
|
---|
| 1887 |
|
---|
| 1888 | word(yylval.cp); /* add word to wdlist */
|
---|
| 1889 | word(NOWORD); /* terminate wdlist */
|
---|
| 1890 | t->words = copyw(); /* dup wdlist */
|
---|
| 1891 | break;
|
---|
| 1892 |
|
---|
| 1893 | }
|
---|
| 1894 |
|
---|
| 1895 | while (synio(0));
|
---|
| 1896 |
|
---|
| 1897 | t = namelist(t);
|
---|
| 1898 | iolist = iosave;
|
---|
| 1899 |
|
---|
| 1900 | DBGPRINTF(("COMMAND: returning %p\n", t));
|
---|
| 1901 |
|
---|
[1770] | 1902 | return t;
|
---|
[821] | 1903 | }
|
---|
| 1904 |
|
---|
| 1905 | static struct op *dowholefile(int type, int mark)
|
---|
| 1906 | {
|
---|
[1770] | 1907 | struct op *t;
|
---|
[821] | 1908 |
|
---|
| 1909 | DBGPRINTF(("DOWHOLEFILE: enter, type=%d, mark=%d\n", type, mark));
|
---|
| 1910 |
|
---|
| 1911 | multiline++;
|
---|
| 1912 | t = c_list();
|
---|
| 1913 | multiline--;
|
---|
| 1914 | t = block(type, t, NOBLOCK, NOWORDS);
|
---|
| 1915 | DBGPRINTF(("DOWHOLEFILE: return t=%p\n", t));
|
---|
[1770] | 1916 | return t;
|
---|
[821] | 1917 | }
|
---|
| 1918 |
|
---|
| 1919 | static struct op *dogroup(int onlydone)
|
---|
| 1920 | {
|
---|
[1770] | 1921 | int c;
|
---|
| 1922 | struct op *mylist;
|
---|
[821] | 1923 |
|
---|
| 1924 | c = yylex(CONTIN);
|
---|
| 1925 | if (c == DONE && onlydone)
|
---|
[1770] | 1926 | return NULL;
|
---|
[821] | 1927 | if (c != DO)
|
---|
[1770] | 1928 | zzerr();
|
---|
[821] | 1929 | mylist = c_list();
|
---|
| 1930 | musthave(DONE, 0);
|
---|
[1770] | 1931 | return mylist;
|
---|
[821] | 1932 | }
|
---|
| 1933 |
|
---|
| 1934 | static struct op *thenpart(void)
|
---|
| 1935 | {
|
---|
[1770] | 1936 | int c;
|
---|
| 1937 | struct op *t;
|
---|
[821] | 1938 |
|
---|
[1770] | 1939 | c = yylex(0);
|
---|
| 1940 | if (c != THEN) {
|
---|
[821] | 1941 | peeksym = c;
|
---|
[1770] | 1942 | return NULL;
|
---|
[821] | 1943 | }
|
---|
| 1944 | t = newtp();
|
---|
| 1945 | t->type = 0;
|
---|
| 1946 | t->left = c_list();
|
---|
| 1947 | if (t->left == NULL)
|
---|
[1770] | 1948 | zzerr();
|
---|
[821] | 1949 | t->right = elsepart();
|
---|
[1770] | 1950 | return t;
|
---|
[821] | 1951 | }
|
---|
| 1952 |
|
---|
| 1953 | static struct op *elsepart(void)
|
---|
| 1954 | {
|
---|
[1770] | 1955 | int c;
|
---|
| 1956 | struct op *t;
|
---|
[821] | 1957 |
|
---|
| 1958 | switch (c = yylex(0)) {
|
---|
| 1959 | case ELSE:
|
---|
[1770] | 1960 | t = c_list();
|
---|
| 1961 | if (t == NULL)
|
---|
| 1962 | zzerr();
|
---|
| 1963 | return t;
|
---|
[821] | 1964 |
|
---|
| 1965 | case ELIF:
|
---|
| 1966 | t = newtp();
|
---|
| 1967 | t->type = TELIF;
|
---|
| 1968 | t->left = c_list();
|
---|
| 1969 | t->right = thenpart();
|
---|
[1770] | 1970 | return t;
|
---|
[821] | 1971 |
|
---|
| 1972 | default:
|
---|
| 1973 | peeksym = c;
|
---|
[1770] | 1974 | return NULL;
|
---|
[821] | 1975 | }
|
---|
| 1976 | }
|
---|
| 1977 |
|
---|
| 1978 | static struct op *caselist(void)
|
---|
| 1979 | {
|
---|
[1770] | 1980 | struct op *t;
|
---|
[821] | 1981 |
|
---|
| 1982 | t = NULL;
|
---|
| 1983 | while ((peeksym = yylex(CONTIN)) != ESAC) {
|
---|
| 1984 | DBGPRINTF(("CASELIST, doing yylex, peeksym=%d\n", peeksym));
|
---|
| 1985 | t = list(t, casepart());
|
---|
| 1986 | }
|
---|
| 1987 |
|
---|
| 1988 | DBGPRINTF(("CASELIST, returning t=%p\n", t));
|
---|
[1770] | 1989 | return t;
|
---|
[821] | 1990 | }
|
---|
| 1991 |
|
---|
| 1992 | static struct op *casepart(void)
|
---|
| 1993 | {
|
---|
[1770] | 1994 | struct op *t;
|
---|
[821] | 1995 |
|
---|
| 1996 | DBGPRINTF7(("CASEPART: enter...\n"));
|
---|
| 1997 |
|
---|
| 1998 | t = newtp();
|
---|
| 1999 | t->type = TPAT;
|
---|
| 2000 | t->words = pattern();
|
---|
| 2001 | musthave(')', 0);
|
---|
| 2002 | t->left = c_list();
|
---|
[1770] | 2003 | peeksym = yylex(CONTIN);
|
---|
| 2004 | if (peeksym != ESAC)
|
---|
[821] | 2005 | musthave(BREAK, CONTIN);
|
---|
| 2006 |
|
---|
| 2007 | DBGPRINTF7(("CASEPART: made newtp(TPAT, t=%p)\n", t));
|
---|
| 2008 |
|
---|
[1770] | 2009 | return t;
|
---|
[821] | 2010 | }
|
---|
| 2011 |
|
---|
| 2012 | static char **pattern(void)
|
---|
| 2013 | {
|
---|
[1770] | 2014 | int c, cf;
|
---|
[821] | 2015 |
|
---|
| 2016 | cf = CONTIN;
|
---|
| 2017 | do {
|
---|
| 2018 | musthave(WORD, cf);
|
---|
| 2019 | word(yylval.cp);
|
---|
| 2020 | cf = 0;
|
---|
[1770] | 2021 | c = yylex(0);
|
---|
| 2022 | } while (c == '|');
|
---|
[821] | 2023 | peeksym = c;
|
---|
| 2024 | word(NOWORD);
|
---|
| 2025 |
|
---|
[1770] | 2026 | return copyw();
|
---|
[821] | 2027 | }
|
---|
| 2028 |
|
---|
| 2029 | static char **wordlist(void)
|
---|
| 2030 | {
|
---|
[1770] | 2031 | int c;
|
---|
[821] | 2032 |
|
---|
[1770] | 2033 | c = yylex(0);
|
---|
| 2034 | if (c != IN) {
|
---|
[821] | 2035 | peeksym = c;
|
---|
[1770] | 2036 | return NULL;
|
---|
[821] | 2037 | }
|
---|
| 2038 | startl = 0;
|
---|
| 2039 | while ((c = yylex(0)) == WORD)
|
---|
| 2040 | word(yylval.cp);
|
---|
| 2041 | word(NOWORD);
|
---|
| 2042 | peeksym = c;
|
---|
[1770] | 2043 | return copyw();
|
---|
[821] | 2044 | }
|
---|
| 2045 |
|
---|
| 2046 | /*
|
---|
| 2047 | * supporting functions
|
---|
| 2048 | */
|
---|
[1770] | 2049 | static struct op *list(struct op *t1, struct op *t2)
|
---|
[821] | 2050 | {
|
---|
| 2051 | DBGPRINTF7(("LIST: enter, t1=%p, t2=%p\n", t1, t2));
|
---|
| 2052 |
|
---|
| 2053 | if (t1 == NULL)
|
---|
[1770] | 2054 | return t2;
|
---|
[821] | 2055 | if (t2 == NULL)
|
---|
[1770] | 2056 | return t1;
|
---|
[821] | 2057 |
|
---|
[1770] | 2058 | return block(TLIST, t1, t2, NOWORDS);
|
---|
[821] | 2059 | }
|
---|
| 2060 |
|
---|
| 2061 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp)
|
---|
| 2062 | {
|
---|
[1770] | 2063 | struct op *t;
|
---|
[821] | 2064 |
|
---|
| 2065 | DBGPRINTF7(("BLOCK: enter, type=%d (%s)\n", type, T_CMD_NAMES[type]));
|
---|
| 2066 |
|
---|
| 2067 | t = newtp();
|
---|
| 2068 | t->type = type;
|
---|
| 2069 | t->left = t1;
|
---|
| 2070 | t->right = t2;
|
---|
| 2071 | t->words = wp;
|
---|
| 2072 |
|
---|
| 2073 | DBGPRINTF7(("BLOCK: inserted %p between %p and %p\n", t, t1,
|
---|
| 2074 | t2));
|
---|
| 2075 |
|
---|
[1770] | 2076 | return t;
|
---|
[821] | 2077 | }
|
---|
| 2078 |
|
---|
| 2079 | /* See if given string is a shell multiline (FOR, IF, etc) */
|
---|
[1770] | 2080 | static int rlookup(char *n)
|
---|
[821] | 2081 | {
|
---|
[1770] | 2082 | const struct res *rp;
|
---|
[821] | 2083 |
|
---|
| 2084 | DBGPRINTF7(("RLOOKUP: enter, n is %s\n", n));
|
---|
| 2085 |
|
---|
| 2086 | for (rp = restab; rp->r_name; rp++)
|
---|
| 2087 | if (strcmp(rp->r_name, n) == 0) {
|
---|
| 2088 | DBGPRINTF7(("RLOOKUP: match, returning %d\n", rp->r_val));
|
---|
[1770] | 2089 | return rp->r_val; /* Return numeric code for shell multiline */
|
---|
[821] | 2090 | }
|
---|
| 2091 |
|
---|
| 2092 | DBGPRINTF7(("RLOOKUP: NO match, returning 0\n"));
|
---|
[1770] | 2093 | return 0; /* Not a shell multiline */
|
---|
[821] | 2094 | }
|
---|
| 2095 |
|
---|
| 2096 | static struct op *newtp(void)
|
---|
| 2097 | {
|
---|
[1770] | 2098 | struct op *t;
|
---|
[821] | 2099 |
|
---|
| 2100 | t = (struct op *) tree(sizeof(*t));
|
---|
| 2101 | t->type = 0;
|
---|
| 2102 | t->words = NULL;
|
---|
| 2103 | t->ioact = NULL;
|
---|
| 2104 | t->left = NULL;
|
---|
| 2105 | t->right = NULL;
|
---|
| 2106 | t->str = NULL;
|
---|
| 2107 |
|
---|
| 2108 | DBGPRINTF3(("NEWTP: allocated %p\n", t));
|
---|
| 2109 |
|
---|
[1770] | 2110 | return t;
|
---|
[821] | 2111 | }
|
---|
| 2112 |
|
---|
[1770] | 2113 | static struct op *namelist(struct op *t)
|
---|
[821] | 2114 | {
|
---|
| 2115 | DBGPRINTF7(("NAMELIST: enter, t=%p, type %s, iolist=%p\n", t,
|
---|
| 2116 | T_CMD_NAMES[t->type], iolist));
|
---|
| 2117 |
|
---|
| 2118 | if (iolist) {
|
---|
| 2119 | iolist = addword((char *) NULL, iolist);
|
---|
| 2120 | t->ioact = copyio();
|
---|
| 2121 | } else
|
---|
| 2122 | t->ioact = NULL;
|
---|
| 2123 |
|
---|
| 2124 | if (t->type != TCOM) {
|
---|
| 2125 | if (t->type != TPAREN && t->ioact != NULL) {
|
---|
| 2126 | t = block(TPAREN, t, NOBLOCK, NOWORDS);
|
---|
| 2127 | t->ioact = t->left->ioact;
|
---|
| 2128 | t->left->ioact = NULL;
|
---|
| 2129 | }
|
---|
[1770] | 2130 | return t;
|
---|
[821] | 2131 | }
|
---|
| 2132 |
|
---|
| 2133 | word(NOWORD);
|
---|
| 2134 | t->words = copyw();
|
---|
| 2135 |
|
---|
[1770] | 2136 | return t;
|
---|
[821] | 2137 | }
|
---|
| 2138 |
|
---|
| 2139 | static char **copyw(void)
|
---|
| 2140 | {
|
---|
[1770] | 2141 | char **wd;
|
---|
[821] | 2142 |
|
---|
| 2143 | wd = getwords(wdlist);
|
---|
| 2144 | wdlist = 0;
|
---|
[1770] | 2145 | return wd;
|
---|
[821] | 2146 | }
|
---|
| 2147 |
|
---|
| 2148 | static void word(char *cp)
|
---|
| 2149 | {
|
---|
| 2150 | wdlist = addword(cp, wdlist);
|
---|
| 2151 | }
|
---|
| 2152 |
|
---|
| 2153 | static struct ioword **copyio(void)
|
---|
| 2154 | {
|
---|
[1770] | 2155 | struct ioword **iop;
|
---|
[821] | 2156 |
|
---|
| 2157 | iop = (struct ioword **) getwords(iolist);
|
---|
| 2158 | iolist = 0;
|
---|
[1770] | 2159 | return iop;
|
---|
[821] | 2160 | }
|
---|
| 2161 |
|
---|
| 2162 | static struct ioword *io(int u, int f, char *cp)
|
---|
| 2163 | {
|
---|
[1770] | 2164 | struct ioword *iop;
|
---|
[821] | 2165 |
|
---|
| 2166 | iop = (struct ioword *) tree(sizeof(*iop));
|
---|
| 2167 | iop->io_unit = u;
|
---|
| 2168 | iop->io_flag = f;
|
---|
| 2169 | iop->io_name = cp;
|
---|
| 2170 | iolist = addword((char *) iop, iolist);
|
---|
[1770] | 2171 | return iop;
|
---|
[821] | 2172 | }
|
---|
| 2173 |
|
---|
| 2174 | static int yylex(int cf)
|
---|
| 2175 | {
|
---|
[1770] | 2176 | int c, c1;
|
---|
[821] | 2177 | int atstart;
|
---|
| 2178 |
|
---|
[1770] | 2179 | c = peeksym;
|
---|
| 2180 | if (c > 0) {
|
---|
[821] | 2181 | peeksym = 0;
|
---|
| 2182 | if (c == '\n')
|
---|
| 2183 | startl = 1;
|
---|
[1770] | 2184 | return c;
|
---|
[821] | 2185 | }
|
---|
| 2186 |
|
---|
| 2187 | nlseen = 0;
|
---|
| 2188 | atstart = startl;
|
---|
| 2189 | startl = 0;
|
---|
| 2190 | yylval.i = 0;
|
---|
| 2191 | e.linep = line;
|
---|
| 2192 |
|
---|
| 2193 | /* MALAMO */
|
---|
| 2194 | line[LINELIM - 1] = '\0';
|
---|
| 2195 |
|
---|
[1770] | 2196 | loop:
|
---|
[821] | 2197 | while ((c = my_getc(0)) == ' ' || c == '\t') /* Skip whitespace */
|
---|
| 2198 | ;
|
---|
| 2199 |
|
---|
| 2200 | switch (c) {
|
---|
| 2201 | default:
|
---|
| 2202 | if (any(c, "0123456789")) {
|
---|
[1770] | 2203 | c1 = my_getc(0);
|
---|
| 2204 | unget(c1);
|
---|
[821] | 2205 | if (c1 == '<' || c1 == '>') {
|
---|
| 2206 | iounit = c - '0';
|
---|
| 2207 | goto loop;
|
---|
| 2208 | }
|
---|
| 2209 | *e.linep++ = c;
|
---|
| 2210 | c = c1;
|
---|
| 2211 | }
|
---|
| 2212 | break;
|
---|
| 2213 |
|
---|
| 2214 | case '#': /* Comment, skip to next newline or End-of-string */
|
---|
[1770] | 2215 | while ((c = my_getc(0)) != '\0' && c != '\n');
|
---|
[821] | 2216 | unget(c);
|
---|
| 2217 | goto loop;
|
---|
| 2218 |
|
---|
| 2219 | case 0:
|
---|
| 2220 | DBGPRINTF5(("YYLEX: return 0, c=%d\n", c));
|
---|
[1770] | 2221 | return c;
|
---|
[821] | 2222 |
|
---|
| 2223 | case '$':
|
---|
| 2224 | DBGPRINTF9(("YYLEX: found $\n"));
|
---|
| 2225 | *e.linep++ = c;
|
---|
[1770] | 2226 | c = my_getc(0);
|
---|
| 2227 | if (c == '{') {
|
---|
| 2228 | c = collect(c, '}');
|
---|
| 2229 | if (c != '\0')
|
---|
| 2230 | return c;
|
---|
[821] | 2231 | goto pack;
|
---|
| 2232 | }
|
---|
| 2233 | break;
|
---|
| 2234 |
|
---|
| 2235 | case '`':
|
---|
| 2236 | case '\'':
|
---|
| 2237 | case '"':
|
---|
[1770] | 2238 | c = collect(c, c);
|
---|
| 2239 | if (c != '\0')
|
---|
| 2240 | return c;
|
---|
[821] | 2241 | goto pack;
|
---|
| 2242 |
|
---|
| 2243 | case '|':
|
---|
| 2244 | case '&':
|
---|
| 2245 | case ';':
|
---|
| 2246 | startl = 1;
|
---|
| 2247 | /* If more chars process them, else return NULL char */
|
---|
[1770] | 2248 | c1 = dual(c);
|
---|
| 2249 | if (c1 != '\0')
|
---|
| 2250 | return c1;
|
---|
| 2251 | return c;
|
---|
[821] | 2252 |
|
---|
| 2253 | case '^':
|
---|
| 2254 | startl = 1;
|
---|
[1770] | 2255 | return '|';
|
---|
[821] | 2256 | case '>':
|
---|
| 2257 | case '<':
|
---|
| 2258 | diag(c);
|
---|
[1770] | 2259 | return c;
|
---|
[821] | 2260 |
|
---|
| 2261 | case '\n':
|
---|
| 2262 | nlseen++;
|
---|
| 2263 | gethere();
|
---|
| 2264 | startl = 1;
|
---|
| 2265 | if (multiline || cf & CONTIN) {
|
---|
| 2266 | if (interactive && e.iop <= iostack) {
|
---|
[1770] | 2267 | #if ENABLE_FEATURE_EDITING
|
---|
[821] | 2268 | current_prompt = cprompt->value;
|
---|
| 2269 | #else
|
---|
| 2270 | prs(cprompt->value);
|
---|
| 2271 | #endif
|
---|
| 2272 | }
|
---|
| 2273 | if (cf & CONTIN)
|
---|
| 2274 | goto loop;
|
---|
| 2275 | }
|
---|
[1770] | 2276 | return c;
|
---|
[821] | 2277 |
|
---|
| 2278 | case '(':
|
---|
| 2279 | case ')':
|
---|
| 2280 | startl = 1;
|
---|
[1770] | 2281 | return c;
|
---|
[821] | 2282 | }
|
---|
| 2283 |
|
---|
| 2284 | unget(c);
|
---|
| 2285 |
|
---|
[1770] | 2286 | pack:
|
---|
| 2287 | while ((c = my_getc(0)) != '\0' && !any(c, "`$ '\"\t;&<>()|^\n")) {
|
---|
[821] | 2288 | if (e.linep >= elinep)
|
---|
| 2289 | err("word too long");
|
---|
| 2290 | else
|
---|
| 2291 | *e.linep++ = c;
|
---|
| 2292 | };
|
---|
| 2293 |
|
---|
| 2294 | unget(c);
|
---|
| 2295 |
|
---|
| 2296 | if (any(c, "\"'`$"))
|
---|
| 2297 | goto loop;
|
---|
| 2298 |
|
---|
| 2299 | *e.linep++ = '\0';
|
---|
| 2300 |
|
---|
[1770] | 2301 | if (atstart) {
|
---|
| 2302 | c = rlookup(line);
|
---|
| 2303 | if (c != 0) {
|
---|
| 2304 | startl = 1;
|
---|
| 2305 | return c;
|
---|
| 2306 | }
|
---|
[821] | 2307 | }
|
---|
| 2308 |
|
---|
| 2309 | yylval.cp = strsave(line, areanum);
|
---|
[1770] | 2310 | return WORD;
|
---|
[821] | 2311 | }
|
---|
| 2312 |
|
---|
| 2313 |
|
---|
[1770] | 2314 | static int collect(int c, int c1)
|
---|
[821] | 2315 | {
|
---|
| 2316 | char s[2];
|
---|
| 2317 |
|
---|
| 2318 | DBGPRINTF8(("COLLECT: enter, c=%d, c1=%d\n", c, c1));
|
---|
| 2319 |
|
---|
| 2320 | *e.linep++ = c;
|
---|
| 2321 | while ((c = my_getc(c1)) != c1) {
|
---|
| 2322 | if (c == 0) {
|
---|
| 2323 | unget(c);
|
---|
| 2324 | s[0] = c1;
|
---|
| 2325 | s[1] = 0;
|
---|
| 2326 | prs("no closing ");
|
---|
| 2327 | yyerror(s);
|
---|
[1770] | 2328 | return YYERRCODE;
|
---|
[821] | 2329 | }
|
---|
| 2330 | if (interactive && c == '\n' && e.iop <= iostack) {
|
---|
[1770] | 2331 | #if ENABLE_FEATURE_EDITING
|
---|
[821] | 2332 | current_prompt = cprompt->value;
|
---|
| 2333 | #else
|
---|
| 2334 | prs(cprompt->value);
|
---|
| 2335 | #endif
|
---|
| 2336 | }
|
---|
| 2337 | *e.linep++ = c;
|
---|
| 2338 | }
|
---|
| 2339 |
|
---|
| 2340 | *e.linep++ = c;
|
---|
| 2341 |
|
---|
| 2342 | DBGPRINTF8(("COLLECT: return 0, line is %s\n", line));
|
---|
| 2343 |
|
---|
[1770] | 2344 | return 0;
|
---|
[821] | 2345 | }
|
---|
| 2346 |
|
---|
| 2347 | /* "multiline commands" helper func */
|
---|
| 2348 | /* see if next 2 chars form a shell multiline */
|
---|
[1770] | 2349 | static int dual(int c)
|
---|
[821] | 2350 | {
|
---|
| 2351 | char s[3];
|
---|
[1770] | 2352 | char *cp = s;
|
---|
[821] | 2353 |
|
---|
| 2354 | DBGPRINTF8(("DUAL: enter, c=%d\n", c));
|
---|
| 2355 |
|
---|
[1770] | 2356 | *cp++ = c; /* c is the given "peek" char */
|
---|
| 2357 | *cp++ = my_getc(0); /* get next char of input */
|
---|
| 2358 | *cp = '\0'; /* add EOS marker */
|
---|
[821] | 2359 |
|
---|
[1770] | 2360 | c = rlookup(s); /* see if 2 chars form a shell multiline */
|
---|
[821] | 2361 | if (c == 0)
|
---|
[1770] | 2362 | unget(*--cp); /* String is not a shell multiline, put peek char back */
|
---|
[821] | 2363 |
|
---|
[1770] | 2364 | return c; /* String is multiline, return numeric multiline (restab) code */
|
---|
[821] | 2365 | }
|
---|
| 2366 |
|
---|
[1770] | 2367 | static void diag(int ec)
|
---|
[821] | 2368 | {
|
---|
[1770] | 2369 | int c;
|
---|
[821] | 2370 |
|
---|
| 2371 | DBGPRINTF8(("DIAG: enter, ec=%d\n", ec));
|
---|
| 2372 |
|
---|
| 2373 | c = my_getc(0);
|
---|
| 2374 | if (c == '>' || c == '<') {
|
---|
| 2375 | if (c != ec)
|
---|
| 2376 | zzerr();
|
---|
[1770] | 2377 | yylval.i = (ec == '>' ? IOWRITE | IOCAT : IOHERE);
|
---|
[821] | 2378 | c = my_getc(0);
|
---|
| 2379 | } else
|
---|
[1770] | 2380 | yylval.i = (ec == '>' ? IOWRITE : IOREAD);
|
---|
[821] | 2381 | if (c != '&' || yylval.i == IOHERE)
|
---|
| 2382 | unget(c);
|
---|
| 2383 | else
|
---|
| 2384 | yylval.i |= IODUP;
|
---|
| 2385 | }
|
---|
| 2386 |
|
---|
| 2387 | static char *tree(unsigned size)
|
---|
| 2388 | {
|
---|
[1770] | 2389 | char *t;
|
---|
[821] | 2390 |
|
---|
[1770] | 2391 | t = getcell(size);
|
---|
| 2392 | if (t == NULL) {
|
---|
[821] | 2393 | DBGPRINTF2(("TREE: getcell(%d) failed!\n", size));
|
---|
| 2394 | prs("command line too complicated\n");
|
---|
| 2395 | fail();
|
---|
| 2396 | /* NOTREACHED */
|
---|
| 2397 | }
|
---|
[1770] | 2398 | return t;
|
---|
[821] | 2399 | }
|
---|
| 2400 |
|
---|
[1770] | 2401 |
|
---|
[821] | 2402 | /* VARARGS1 */
|
---|
| 2403 | /* ARGSUSED */
|
---|
| 2404 |
|
---|
| 2405 | /* -------- exec.c -------- */
|
---|
| 2406 |
|
---|
[1770] | 2407 | static struct op **find1case(struct op *t, const char *w)
|
---|
| 2408 | {
|
---|
| 2409 | struct op *t1;
|
---|
| 2410 | struct op **tp;
|
---|
| 2411 | char **wp;
|
---|
| 2412 | char *cp;
|
---|
| 2413 |
|
---|
| 2414 | if (t == NULL) {
|
---|
| 2415 | DBGPRINTF3(("FIND1CASE: enter, t==NULL, returning.\n"));
|
---|
| 2416 | return NULL;
|
---|
| 2417 | }
|
---|
| 2418 |
|
---|
| 2419 | DBGPRINTF3(("FIND1CASE: enter, t->type=%d (%s)\n", t->type,
|
---|
| 2420 | T_CMD_NAMES[t->type]));
|
---|
| 2421 |
|
---|
| 2422 | if (t->type == TLIST) {
|
---|
| 2423 | tp = find1case(t->left, w);
|
---|
| 2424 | if (tp != NULL) {
|
---|
| 2425 | DBGPRINTF3(("FIND1CASE: found one to the left, returning tp=%p\n", tp));
|
---|
| 2426 | return tp;
|
---|
| 2427 | }
|
---|
| 2428 | t1 = t->right; /* TPAT */
|
---|
| 2429 | } else
|
---|
| 2430 | t1 = t;
|
---|
| 2431 |
|
---|
| 2432 | for (wp = t1->words; *wp;) {
|
---|
| 2433 | cp = evalstr(*wp++, DOSUB);
|
---|
| 2434 | if (cp && gmatch(w, cp)) {
|
---|
| 2435 | DBGPRINTF3(("FIND1CASE: returning &t1->left= %p.\n",
|
---|
| 2436 | &t1->left));
|
---|
| 2437 | return &t1->left;
|
---|
| 2438 | }
|
---|
| 2439 | }
|
---|
| 2440 |
|
---|
| 2441 | DBGPRINTF(("FIND1CASE: returning NULL\n"));
|
---|
| 2442 | return NULL;
|
---|
| 2443 | }
|
---|
| 2444 |
|
---|
| 2445 | static struct op *findcase(struct op *t, const char *w)
|
---|
| 2446 | {
|
---|
| 2447 | struct op **tp;
|
---|
| 2448 |
|
---|
| 2449 | tp = find1case(t, w);
|
---|
| 2450 | return tp != NULL ? *tp : NULL;
|
---|
| 2451 | }
|
---|
| 2452 |
|
---|
[821] | 2453 | /*
|
---|
| 2454 | * execute tree
|
---|
| 2455 | */
|
---|
| 2456 |
|
---|
[1770] | 2457 | static int execute(struct op *t, int *pin, int *pout, int act)
|
---|
[821] | 2458 | {
|
---|
[1770] | 2459 | struct op *t1;
|
---|
[821] | 2460 | volatile int i, rv, a;
|
---|
[1770] | 2461 | const char *cp;
|
---|
| 2462 | char **wp, **wp2;
|
---|
[821] | 2463 | struct var *vp;
|
---|
| 2464 | struct op *outtree_save;
|
---|
| 2465 | struct brkcon bc;
|
---|
| 2466 |
|
---|
| 2467 | #if __GNUC__
|
---|
| 2468 | /* Avoid longjmp clobbering */
|
---|
| 2469 | (void) ℘
|
---|
| 2470 | #endif
|
---|
| 2471 |
|
---|
| 2472 | if (t == NULL) {
|
---|
| 2473 | DBGPRINTF4(("EXECUTE: enter, t==null, returning.\n"));
|
---|
[1770] | 2474 | return 0;
|
---|
[821] | 2475 | }
|
---|
| 2476 |
|
---|
| 2477 | DBGPRINTF(("EXECUTE: t=%p, t->type=%d (%s), t->words is %s\n", t,
|
---|
| 2478 | t->type, T_CMD_NAMES[t->type],
|
---|
| 2479 | ((t->words == NULL) ? "NULL" : t->words[0])));
|
---|
| 2480 |
|
---|
| 2481 | rv = 0;
|
---|
| 2482 | a = areanum++;
|
---|
| 2483 | wp = (wp2 = t->words) != NULL
|
---|
| 2484 | ? eval(wp2, t->type == TCOM ? DOALL : DOALL & ~DOKEY)
|
---|
| 2485 | : NULL;
|
---|
| 2486 |
|
---|
| 2487 | switch (t->type) {
|
---|
| 2488 | case TDOT:
|
---|
| 2489 | DBGPRINTF3(("EXECUTE: TDOT\n"));
|
---|
| 2490 |
|
---|
| 2491 | outtree_save = outtree;
|
---|
| 2492 |
|
---|
| 2493 | newfile(evalstr(t->words[0], DOALL));
|
---|
| 2494 |
|
---|
| 2495 | t->left = dowholefile(TLIST, 0);
|
---|
| 2496 | t->right = NULL;
|
---|
| 2497 |
|
---|
| 2498 | outtree = outtree_save;
|
---|
| 2499 |
|
---|
| 2500 | if (t->left)
|
---|
| 2501 | rv = execute(t->left, pin, pout, 0);
|
---|
| 2502 | if (t->right)
|
---|
| 2503 | rv = execute(t->right, pin, pout, 0);
|
---|
| 2504 | break;
|
---|
| 2505 |
|
---|
| 2506 | case TPAREN:
|
---|
| 2507 | rv = execute(t->left, pin, pout, 0);
|
---|
| 2508 | break;
|
---|
| 2509 |
|
---|
| 2510 | case TCOM:
|
---|
[1770] | 2511 | rv = forkexec(t, pin, pout, act, wp);
|
---|
[821] | 2512 | break;
|
---|
| 2513 |
|
---|
| 2514 | case TPIPE:
|
---|
| 2515 | {
|
---|
| 2516 | int pv[2];
|
---|
| 2517 |
|
---|
[1770] | 2518 | rv = openpipe(pv);
|
---|
| 2519 | if (rv < 0)
|
---|
[821] | 2520 | break;
|
---|
| 2521 | pv[0] = remap(pv[0]);
|
---|
| 2522 | pv[1] = remap(pv[1]);
|
---|
| 2523 | (void) execute(t->left, pin, pv, 0);
|
---|
| 2524 | rv = execute(t->right, pv, pout, 0);
|
---|
| 2525 | }
|
---|
| 2526 | break;
|
---|
| 2527 |
|
---|
| 2528 | case TLIST:
|
---|
| 2529 | (void) execute(t->left, pin, pout, 0);
|
---|
| 2530 | rv = execute(t->right, pin, pout, 0);
|
---|
| 2531 | break;
|
---|
| 2532 |
|
---|
| 2533 | case TASYNC:
|
---|
| 2534 | {
|
---|
| 2535 | int hinteractive = interactive;
|
---|
| 2536 |
|
---|
| 2537 | DBGPRINTF7(("EXECUTE: TASYNC clause, calling vfork()...\n"));
|
---|
| 2538 |
|
---|
| 2539 | i = vfork();
|
---|
[1770] | 2540 | if (i == 0) { /* child */
|
---|
[821] | 2541 | signal(SIGINT, SIG_IGN);
|
---|
| 2542 | signal(SIGQUIT, SIG_IGN);
|
---|
| 2543 | if (interactive)
|
---|
| 2544 | signal(SIGTERM, SIG_DFL);
|
---|
| 2545 | interactive = 0;
|
---|
| 2546 | if (pin == NULL) {
|
---|
| 2547 | close(0);
|
---|
[1770] | 2548 | xopen(bb_dev_null, O_RDONLY);
|
---|
[821] | 2549 | }
|
---|
| 2550 | _exit(execute(t->left, pin, pout, FEXEC));
|
---|
| 2551 | }
|
---|
[1770] | 2552 | interactive = hinteractive;
|
---|
| 2553 | if (i != -1) {
|
---|
| 2554 | setval(lookup("!"), putn(i));
|
---|
| 2555 | if (pin != NULL)
|
---|
| 2556 | closepipe(pin);
|
---|
| 2557 | if (interactive) {
|
---|
| 2558 | prs(putn(i));
|
---|
| 2559 | prs("\n");
|
---|
| 2560 | }
|
---|
| 2561 | } else
|
---|
| 2562 | rv = -1;
|
---|
| 2563 | setstatus(rv);
|
---|
[821] | 2564 | }
|
---|
| 2565 | break;
|
---|
| 2566 |
|
---|
| 2567 | case TOR:
|
---|
| 2568 | case TAND:
|
---|
| 2569 | rv = execute(t->left, pin, pout, 0);
|
---|
[1770] | 2570 | t1 = t->right;
|
---|
| 2571 | if (t1 != NULL && (rv == 0) == (t->type == TAND))
|
---|
[821] | 2572 | rv = execute(t1, pin, pout, 0);
|
---|
| 2573 | break;
|
---|
| 2574 |
|
---|
| 2575 | case TFOR:
|
---|
| 2576 | if (wp == NULL) {
|
---|
| 2577 | wp = dolv + 1;
|
---|
[1770] | 2578 | i = dolc;
|
---|
| 2579 | if (i < 0)
|
---|
[821] | 2580 | i = 0;
|
---|
| 2581 | } else {
|
---|
| 2582 | i = -1;
|
---|
| 2583 | while (*wp++ != NULL);
|
---|
| 2584 | }
|
---|
| 2585 | vp = lookup(t->str);
|
---|
| 2586 | while (setjmp(bc.brkpt))
|
---|
| 2587 | if (isbreak)
|
---|
| 2588 | goto broken;
|
---|
| 2589 | brkset(&bc);
|
---|
| 2590 | for (t1 = t->left; i-- && *wp != NULL;) {
|
---|
| 2591 | setval(vp, *wp++);
|
---|
| 2592 | rv = execute(t1, pin, pout, 0);
|
---|
| 2593 | }
|
---|
| 2594 | brklist = brklist->nextlev;
|
---|
| 2595 | break;
|
---|
| 2596 |
|
---|
| 2597 | case TWHILE:
|
---|
| 2598 | case TUNTIL:
|
---|
| 2599 | while (setjmp(bc.brkpt))
|
---|
| 2600 | if (isbreak)
|
---|
| 2601 | goto broken;
|
---|
| 2602 | brkset(&bc);
|
---|
| 2603 | t1 = t->left;
|
---|
| 2604 | while ((execute(t1, pin, pout, 0) == 0) == (t->type == TWHILE))
|
---|
| 2605 | rv = execute(t->right, pin, pout, 0);
|
---|
| 2606 | brklist = brklist->nextlev;
|
---|
| 2607 | break;
|
---|
| 2608 |
|
---|
| 2609 | case TIF:
|
---|
| 2610 | case TELIF:
|
---|
| 2611 | if (t->right != NULL) {
|
---|
| 2612 | rv = !execute(t->left, pin, pout, 0) ?
|
---|
| 2613 | execute(t->right->left, pin, pout, 0) :
|
---|
| 2614 | execute(t->right->right, pin, pout, 0);
|
---|
| 2615 | }
|
---|
| 2616 | break;
|
---|
| 2617 |
|
---|
| 2618 | case TCASE:
|
---|
[1770] | 2619 | cp = evalstr(t->str, DOSUB | DOTRIM);
|
---|
| 2620 | if (cp == NULL)
|
---|
[821] | 2621 | cp = "";
|
---|
| 2622 |
|
---|
| 2623 | DBGPRINTF7(("EXECUTE: TCASE, t->str is %s, cp is %s\n",
|
---|
| 2624 | ((t->str == NULL) ? "NULL" : t->str),
|
---|
| 2625 | ((cp == NULL) ? "NULL" : cp)));
|
---|
| 2626 |
|
---|
[1770] | 2627 | t1 = findcase(t->left, cp);
|
---|
| 2628 | if (t1 != NULL) {
|
---|
[821] | 2629 | DBGPRINTF7(("EXECUTE: TCASE, calling execute(t=%p, t1=%p)...\n", t, t1));
|
---|
| 2630 | rv = execute(t1, pin, pout, 0);
|
---|
| 2631 | DBGPRINTF7(("EXECUTE: TCASE, back from execute(t=%p, t1=%p)...\n", t, t1));
|
---|
| 2632 | }
|
---|
| 2633 | break;
|
---|
| 2634 |
|
---|
| 2635 | case TBRACE:
|
---|
| 2636 | /*
|
---|
[1770] | 2637 | iopp = t->ioact;
|
---|
| 2638 | if (i)
|
---|
[821] | 2639 | while (*iopp)
|
---|
| 2640 | if (iosetup(*iopp++, pin!=NULL, pout!=NULL)) {
|
---|
| 2641 | rv = -1;
|
---|
| 2642 | break;
|
---|
| 2643 | }
|
---|
| 2644 | */
|
---|
[1770] | 2645 | if (rv >= 0) {
|
---|
| 2646 | t1 = t->left;
|
---|
| 2647 | if (t1) {
|
---|
| 2648 | rv = execute(t1, pin, pout, 0);
|
---|
| 2649 | }
|
---|
| 2650 | }
|
---|
[821] | 2651 | break;
|
---|
| 2652 |
|
---|
| 2653 | };
|
---|
| 2654 |
|
---|
[1770] | 2655 | broken:
|
---|
[821] | 2656 | t->words = wp2;
|
---|
| 2657 | isbreak = 0;
|
---|
| 2658 | freehere(areanum);
|
---|
| 2659 | freearea(areanum);
|
---|
| 2660 | areanum = a;
|
---|
| 2661 | if (interactive && intr) {
|
---|
| 2662 | closeall();
|
---|
| 2663 | fail();
|
---|
| 2664 | }
|
---|
| 2665 |
|
---|
[1770] | 2666 | i = trapset;
|
---|
| 2667 | if (i != 0) {
|
---|
[821] | 2668 | trapset = 0;
|
---|
| 2669 | runtrap(i);
|
---|
| 2670 | }
|
---|
| 2671 |
|
---|
| 2672 | DBGPRINTF(("EXECUTE: returning from t=%p, rv=%d\n", t, rv));
|
---|
[1770] | 2673 | return rv;
|
---|
[821] | 2674 | }
|
---|
| 2675 |
|
---|
[1770] | 2676 | typedef int (*builtin_func_ptr)(struct op *);
|
---|
| 2677 |
|
---|
| 2678 | static builtin_func_ptr inbuilt(const char *s)
|
---|
[821] | 2679 | {
|
---|
[1770] | 2680 | const struct builtincmd *bp;
|
---|
| 2681 |
|
---|
| 2682 | for (bp = builtincmds; bp->name; bp++)
|
---|
| 2683 | if (strcmp(bp->name, s) == 0)
|
---|
| 2684 | return bp->builtinfunc;
|
---|
| 2685 | return NULL;
|
---|
| 2686 | }
|
---|
| 2687 |
|
---|
| 2688 | static int forkexec(struct op *t, int *pin, int *pout, int act, char **wp)
|
---|
| 2689 | {
|
---|
[821] | 2690 | pid_t newpid;
|
---|
| 2691 | int i, rv;
|
---|
[1770] | 2692 | builtin_func_ptr shcom = NULL;
|
---|
| 2693 | int f;
|
---|
| 2694 | const char *cp = NULL;
|
---|
[821] | 2695 | struct ioword **iopp;
|
---|
| 2696 | int resetsig;
|
---|
| 2697 | char **owp;
|
---|
| 2698 | int forked = 0;
|
---|
| 2699 |
|
---|
| 2700 | int *hpin = pin;
|
---|
| 2701 | int *hpout = pout;
|
---|
| 2702 | char *hwp;
|
---|
| 2703 | int hinteractive;
|
---|
| 2704 | int hintr;
|
---|
| 2705 | struct brkcon *hbrklist;
|
---|
| 2706 | int hexecflg;
|
---|
| 2707 |
|
---|
| 2708 | #if __GNUC__
|
---|
| 2709 | /* Avoid longjmp clobbering */
|
---|
| 2710 | (void) &pin;
|
---|
| 2711 | (void) &pout;
|
---|
| 2712 | (void) ℘
|
---|
| 2713 | (void) &shcom;
|
---|
| 2714 | (void) &cp;
|
---|
| 2715 | (void) &resetsig;
|
---|
| 2716 | (void) &owp;
|
---|
| 2717 | #endif
|
---|
| 2718 |
|
---|
| 2719 | DBGPRINTF(("FORKEXEC: t=%p, pin %p, pout %p, act %d\n", t, pin,
|
---|
| 2720 | pout, act));
|
---|
| 2721 | DBGPRINTF7(("FORKEXEC: t->words is %s\n",
|
---|
| 2722 | ((t->words == NULL) ? "NULL" : t->words[0])));
|
---|
| 2723 |
|
---|
| 2724 | owp = wp;
|
---|
| 2725 | resetsig = 0;
|
---|
| 2726 | rv = -1; /* system-detected error */
|
---|
| 2727 | if (t->type == TCOM) {
|
---|
[1770] | 2728 | while (*wp++ != NULL)
|
---|
| 2729 | continue;
|
---|
[821] | 2730 | cp = *wp;
|
---|
| 2731 |
|
---|
| 2732 | /* strip all initial assignments */
|
---|
| 2733 | /* not correct wrt PATH=yyy command etc */
|
---|
[1770] | 2734 | if (FLAG['x']) {
|
---|
[821] | 2735 | DBGPRINTF9(("FORKEXEC: echo'ing, cp=%p, wp=%p, owp=%p\n",
|
---|
| 2736 | cp, wp, owp));
|
---|
| 2737 | echo(cp ? wp : owp);
|
---|
| 2738 | }
|
---|
| 2739 |
|
---|
| 2740 | if (cp == NULL && t->ioact == NULL) {
|
---|
[1770] | 2741 | while ((cp = *owp++) != NULL && assign(cp, COPYV))
|
---|
| 2742 | continue;
|
---|
[821] | 2743 | DBGPRINTF(("FORKEXEC: returning setstatus()\n"));
|
---|
[1770] | 2744 | return setstatus(0);
|
---|
| 2745 | }
|
---|
| 2746 | if (cp != NULL) {
|
---|
[821] | 2747 | shcom = inbuilt(cp);
|
---|
| 2748 | }
|
---|
| 2749 | }
|
---|
| 2750 |
|
---|
| 2751 | t->words = wp;
|
---|
| 2752 | f = act;
|
---|
| 2753 |
|
---|
| 2754 | DBGPRINTF(("FORKEXEC: shcom %p, f&FEXEC 0x%x, owp %p\n", shcom,
|
---|
| 2755 | f & FEXEC, owp));
|
---|
| 2756 |
|
---|
| 2757 | if (shcom == NULL && (f & FEXEC) == 0) {
|
---|
| 2758 | /* Save values in case the child process alters them */
|
---|
| 2759 | hpin = pin;
|
---|
| 2760 | hpout = pout;
|
---|
| 2761 | hwp = *wp;
|
---|
| 2762 | hinteractive = interactive;
|
---|
| 2763 | hintr = intr;
|
---|
| 2764 | hbrklist = brklist;
|
---|
| 2765 | hexecflg = execflg;
|
---|
| 2766 |
|
---|
| 2767 | DBGPRINTF3(("FORKEXEC: calling vfork()...\n"));
|
---|
| 2768 |
|
---|
| 2769 | newpid = vfork();
|
---|
| 2770 |
|
---|
| 2771 | if (newpid == -1) {
|
---|
[1770] | 2772 | DBGPRINTF(("FORKEXEC: ERROR, cannot vfork()!\n"));
|
---|
| 2773 | return -1;
|
---|
[821] | 2774 | }
|
---|
| 2775 |
|
---|
[1770] | 2776 | if (newpid > 0) { /* Parent */
|
---|
[821] | 2777 | /* Restore values */
|
---|
| 2778 | pin = hpin;
|
---|
| 2779 | pout = hpout;
|
---|
| 2780 | *wp = hwp;
|
---|
| 2781 | interactive = hinteractive;
|
---|
| 2782 | intr = hintr;
|
---|
| 2783 | brklist = hbrklist;
|
---|
| 2784 | execflg = hexecflg;
|
---|
| 2785 | /* moved up
|
---|
| 2786 | if (i == -1)
|
---|
[1770] | 2787 | return rv;
|
---|
[821] | 2788 | */
|
---|
| 2789 | if (pin != NULL)
|
---|
| 2790 | closepipe(pin);
|
---|
| 2791 |
|
---|
| 2792 | return (pout == NULL ? setstatus(waitfor(newpid, 0)) : 0);
|
---|
| 2793 | }
|
---|
| 2794 |
|
---|
| 2795 | /* Must be the child process, pid should be 0 */
|
---|
| 2796 | DBGPRINTF(("FORKEXEC: child process, shcom=%p\n", shcom));
|
---|
| 2797 |
|
---|
| 2798 | if (interactive) {
|
---|
| 2799 | signal(SIGINT, SIG_IGN);
|
---|
| 2800 | signal(SIGQUIT, SIG_IGN);
|
---|
| 2801 | resetsig = 1;
|
---|
| 2802 | }
|
---|
| 2803 | interactive = 0;
|
---|
| 2804 | intr = 0;
|
---|
| 2805 | forked = 1;
|
---|
| 2806 | brklist = 0;
|
---|
| 2807 | execflg = 0;
|
---|
| 2808 | }
|
---|
| 2809 |
|
---|
| 2810 | if (owp != NULL)
|
---|
| 2811 | while ((cp = *owp++) != NULL && assign(cp, COPYV))
|
---|
| 2812 | if (shcom == NULL)
|
---|
| 2813 | export(lookup(cp));
|
---|
| 2814 |
|
---|
| 2815 | #ifdef COMPIPE
|
---|
| 2816 | if ((pin != NULL || pout != NULL) && shcom != NULL && shcom != doexec) {
|
---|
| 2817 | err("piping to/from shell builtins not yet done");
|
---|
| 2818 | if (forked)
|
---|
| 2819 | _exit(-1);
|
---|
[1770] | 2820 | return -1;
|
---|
[821] | 2821 | }
|
---|
| 2822 | #endif
|
---|
| 2823 |
|
---|
| 2824 | if (pin != NULL) {
|
---|
[1770] | 2825 | xmove_fd(pin[0], 0);
|
---|
| 2826 | if (pin[1] != 0) close(pin[1]);
|
---|
[821] | 2827 | }
|
---|
| 2828 | if (pout != NULL) {
|
---|
[1770] | 2829 | xmove_fd(pout[1], 1);
|
---|
| 2830 | if (pout[1] != 1) close(pout[0]);
|
---|
[821] | 2831 | }
|
---|
| 2832 |
|
---|
[1770] | 2833 | iopp = t->ioact;
|
---|
| 2834 | if (iopp != NULL) {
|
---|
[821] | 2835 | if (shcom != NULL && shcom != doexec) {
|
---|
| 2836 | prs(cp);
|
---|
| 2837 | err(": cannot redirect shell command");
|
---|
| 2838 | if (forked)
|
---|
| 2839 | _exit(-1);
|
---|
[1770] | 2840 | return -1;
|
---|
[821] | 2841 | }
|
---|
| 2842 | while (*iopp)
|
---|
| 2843 | if (iosetup(*iopp++, pin != NULL, pout != NULL)) {
|
---|
| 2844 | if (forked)
|
---|
| 2845 | _exit(rv);
|
---|
[1770] | 2846 | return rv;
|
---|
[821] | 2847 | }
|
---|
| 2848 | }
|
---|
| 2849 |
|
---|
| 2850 | if (shcom) {
|
---|
| 2851 | i = setstatus((*shcom) (t));
|
---|
| 2852 | if (forked)
|
---|
| 2853 | _exit(i);
|
---|
| 2854 | DBGPRINTF(("FORKEXEC: returning i=%d\n", i));
|
---|
[1770] | 2855 | return i;
|
---|
[821] | 2856 | }
|
---|
| 2857 |
|
---|
| 2858 | /* should use FIOCEXCL */
|
---|
| 2859 | for (i = FDBASE; i < NOFILE; i++)
|
---|
| 2860 | close(i);
|
---|
| 2861 | if (resetsig) {
|
---|
| 2862 | signal(SIGINT, SIG_DFL);
|
---|
| 2863 | signal(SIGQUIT, SIG_DFL);
|
---|
| 2864 | }
|
---|
| 2865 |
|
---|
| 2866 | if (t->type == TPAREN)
|
---|
| 2867 | _exit(execute(t->left, NOPIPE, NOPIPE, FEXEC));
|
---|
| 2868 | if (wp[0] == NULL)
|
---|
| 2869 | _exit(0);
|
---|
| 2870 |
|
---|
| 2871 | cp = rexecve(wp[0], wp, makenv(0, NULL));
|
---|
| 2872 | prs(wp[0]);
|
---|
| 2873 | prs(": ");
|
---|
| 2874 | err(cp);
|
---|
| 2875 | if (!execflg)
|
---|
| 2876 | trap[0] = NULL;
|
---|
| 2877 |
|
---|
| 2878 | DBGPRINTF(("FORKEXEC: calling leave(), pid=%d\n", newpid));
|
---|
| 2879 |
|
---|
| 2880 | leave();
|
---|
| 2881 | /* NOTREACHED */
|
---|
| 2882 | _exit(1);
|
---|
| 2883 | }
|
---|
| 2884 |
|
---|
| 2885 | /*
|
---|
| 2886 | * 0< 1> are ignored as required
|
---|
| 2887 | * within pipelines.
|
---|
| 2888 | */
|
---|
[1770] | 2889 | static int iosetup(struct ioword *iop, int pipein, int pipeout)
|
---|
[821] | 2890 | {
|
---|
[1770] | 2891 | int u = -1;
|
---|
| 2892 | char *cp = NULL;
|
---|
| 2893 | const char *msg;
|
---|
[821] | 2894 |
|
---|
| 2895 | DBGPRINTF(("IOSETUP: iop %p, pipein %i, pipeout %i\n", iop,
|
---|
| 2896 | pipein, pipeout));
|
---|
| 2897 |
|
---|
| 2898 | if (iop->io_unit == IODEFAULT) /* take default */
|
---|
| 2899 | iop->io_unit = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1;
|
---|
| 2900 |
|
---|
| 2901 | if (pipein && iop->io_unit == 0)
|
---|
[1770] | 2902 | return 0;
|
---|
[821] | 2903 |
|
---|
| 2904 | if (pipeout && iop->io_unit == 1)
|
---|
[1770] | 2905 | return 0;
|
---|
[821] | 2906 |
|
---|
| 2907 | msg = iop->io_flag & (IOREAD | IOHERE) ? "open" : "create";
|
---|
| 2908 | if ((iop->io_flag & IOHERE) == 0) {
|
---|
[1770] | 2909 | cp = iop->io_name; /* huh?? */
|
---|
| 2910 | cp = evalstr(cp, DOSUB | DOTRIM);
|
---|
| 2911 | if (cp == NULL)
|
---|
| 2912 | return 1;
|
---|
[821] | 2913 | }
|
---|
| 2914 |
|
---|
| 2915 | if (iop->io_flag & IODUP) {
|
---|
| 2916 | if (cp[1] || (!isdigit(*cp) && *cp != '-')) {
|
---|
| 2917 | prs(cp);
|
---|
| 2918 | err(": illegal >& argument");
|
---|
[1770] | 2919 | return 1;
|
---|
[821] | 2920 | }
|
---|
| 2921 | if (*cp == '-')
|
---|
| 2922 | iop->io_flag = IOCLOSE;
|
---|
| 2923 | iop->io_flag &= ~(IOREAD | IOWRITE);
|
---|
| 2924 | }
|
---|
| 2925 | switch (iop->io_flag) {
|
---|
| 2926 | case IOREAD:
|
---|
[1770] | 2927 | u = open(cp, O_RDONLY);
|
---|
[821] | 2928 | break;
|
---|
| 2929 |
|
---|
| 2930 | case IOHERE:
|
---|
| 2931 | case IOHERE | IOXHERE:
|
---|
| 2932 | u = herein(iop->io_name, iop->io_flag & IOXHERE);
|
---|
[1770] | 2933 | cp = (char*)"here file";
|
---|
[821] | 2934 | break;
|
---|
| 2935 |
|
---|
| 2936 | case IOWRITE | IOCAT:
|
---|
[1770] | 2937 | u = open(cp, O_WRONLY);
|
---|
| 2938 | if (u >= 0) {
|
---|
| 2939 | lseek(u, (long) 0, SEEK_END);
|
---|
[821] | 2940 | break;
|
---|
| 2941 | }
|
---|
| 2942 | case IOWRITE:
|
---|
| 2943 | u = creat(cp, 0666);
|
---|
| 2944 | break;
|
---|
| 2945 |
|
---|
| 2946 | case IODUP:
|
---|
| 2947 | u = dup2(*cp - '0', iop->io_unit);
|
---|
| 2948 | break;
|
---|
| 2949 |
|
---|
| 2950 | case IOCLOSE:
|
---|
| 2951 | close(iop->io_unit);
|
---|
[1770] | 2952 | return 0;
|
---|
[821] | 2953 | }
|
---|
| 2954 | if (u < 0) {
|
---|
| 2955 | prs(cp);
|
---|
| 2956 | prs(": cannot ");
|
---|
| 2957 | warn(msg);
|
---|
[1770] | 2958 | return 1;
|
---|
[821] | 2959 | }
|
---|
[1770] | 2960 | if (u != iop->io_unit) {
|
---|
| 2961 | dup2(u, iop->io_unit);
|
---|
| 2962 | close(u);
|
---|
[821] | 2963 | }
|
---|
[1770] | 2964 | return 0;
|
---|
[821] | 2965 | }
|
---|
| 2966 |
|
---|
| 2967 | /*
|
---|
| 2968 | * Enter a new loop level (marked for break/continue).
|
---|
| 2969 | */
|
---|
| 2970 | static void brkset(struct brkcon *bc)
|
---|
| 2971 | {
|
---|
| 2972 | bc->nextlev = brklist;
|
---|
| 2973 | brklist = bc;
|
---|
| 2974 | }
|
---|
| 2975 |
|
---|
| 2976 | /*
|
---|
| 2977 | * Wait for the last process created.
|
---|
| 2978 | * Print a message for each process found
|
---|
| 2979 | * that was killed by a signal.
|
---|
| 2980 | * Ignore interrupt signals while waiting
|
---|
| 2981 | * unless `canintr' is true.
|
---|
| 2982 | */
|
---|
[1770] | 2983 | static int waitfor(int lastpid, int canintr)
|
---|
[821] | 2984 | {
|
---|
[1770] | 2985 | int pid, rv;
|
---|
[821] | 2986 | int s;
|
---|
| 2987 | int oheedint = heedint;
|
---|
| 2988 |
|
---|
| 2989 | heedint = 0;
|
---|
| 2990 | rv = 0;
|
---|
| 2991 | do {
|
---|
| 2992 | pid = wait(&s);
|
---|
| 2993 | if (pid == -1) {
|
---|
| 2994 | if (errno != EINTR || canintr)
|
---|
| 2995 | break;
|
---|
| 2996 | } else {
|
---|
[1770] | 2997 | rv = WAITSIG(s);
|
---|
| 2998 | if (rv != 0) {
|
---|
| 2999 | if (rv < ARRAY_SIZE(signame)) {
|
---|
[821] | 3000 | if (signame[rv] != NULL) {
|
---|
| 3001 | if (pid != lastpid) {
|
---|
| 3002 | prn(pid);
|
---|
| 3003 | prs(": ");
|
---|
| 3004 | }
|
---|
| 3005 | prs(signame[rv]);
|
---|
| 3006 | }
|
---|
| 3007 | } else {
|
---|
| 3008 | if (pid != lastpid) {
|
---|
| 3009 | prn(pid);
|
---|
| 3010 | prs(": ");
|
---|
| 3011 | }
|
---|
| 3012 | prs("Signal ");
|
---|
| 3013 | prn(rv);
|
---|
| 3014 | prs(" ");
|
---|
| 3015 | }
|
---|
| 3016 | if (WAITCORE(s))
|
---|
| 3017 | prs(" - core dumped");
|
---|
[1770] | 3018 | if (rv >= ARRAY_SIZE(signame) || signame[rv])
|
---|
[821] | 3019 | prs("\n");
|
---|
| 3020 | rv = -1;
|
---|
| 3021 | } else
|
---|
| 3022 | rv = WAITVAL(s);
|
---|
| 3023 | }
|
---|
| 3024 | } while (pid != lastpid);
|
---|
| 3025 | heedint = oheedint;
|
---|
| 3026 | if (intr) {
|
---|
| 3027 | if (interactive) {
|
---|
| 3028 | if (canintr)
|
---|
| 3029 | intr = 0;
|
---|
| 3030 | } else {
|
---|
| 3031 | if (exstat == 0)
|
---|
| 3032 | exstat = rv;
|
---|
| 3033 | onintr(0);
|
---|
| 3034 | }
|
---|
| 3035 | }
|
---|
[1770] | 3036 | return rv;
|
---|
[821] | 3037 | }
|
---|
| 3038 |
|
---|
[1770] | 3039 | static int setstatus(int s)
|
---|
[821] | 3040 | {
|
---|
| 3041 | exstat = s;
|
---|
| 3042 | setval(lookup("?"), putn(s));
|
---|
[1770] | 3043 | return s;
|
---|
[821] | 3044 | }
|
---|
| 3045 |
|
---|
| 3046 | /*
|
---|
| 3047 | * PATH-searching interface to execve.
|
---|
| 3048 | * If getenv("PATH") were kept up-to-date,
|
---|
| 3049 | * execvp might be used.
|
---|
| 3050 | */
|
---|
[1770] | 3051 | static const char *rexecve(char *c, char **v, char **envp)
|
---|
[821] | 3052 | {
|
---|
[1770] | 3053 | int i;
|
---|
| 3054 | const char *sp;
|
---|
| 3055 | char *tp;
|
---|
[821] | 3056 | int eacces = 0, asis = 0;
|
---|
| 3057 | char *name = c;
|
---|
| 3058 |
|
---|
[1770] | 3059 | if (ENABLE_FEATURE_SH_STANDALONE) {
|
---|
[902] | 3060 | if (find_applet_by_name(name)) {
|
---|
| 3061 | /* We have to exec here since we vforked. Running
|
---|
[1770] | 3062 | * run_applet_and_exit() won't work and bad things
|
---|
[902] | 3063 | * will happen. */
|
---|
[1770] | 3064 | execve(bb_busybox_exec_path, v, envp);
|
---|
[902] | 3065 | }
|
---|
[821] | 3066 | }
|
---|
| 3067 |
|
---|
| 3068 | DBGPRINTF(("REXECVE: c=%p, v=%p, envp=%p\n", c, v, envp));
|
---|
| 3069 |
|
---|
| 3070 | sp = any('/', c) ? "" : path->value;
|
---|
[1770] | 3071 | asis = (*sp == '\0');
|
---|
[821] | 3072 | while (asis || *sp != '\0') {
|
---|
| 3073 | asis = 0;
|
---|
| 3074 | tp = e.linep;
|
---|
[1770] | 3075 | for (; *sp != '\0'; tp++) {
|
---|
| 3076 | *tp = *sp++;
|
---|
| 3077 | if (*tp == ':') {
|
---|
| 3078 | asis = (*sp == '\0');
|
---|
[821] | 3079 | break;
|
---|
| 3080 | }
|
---|
[1770] | 3081 | }
|
---|
[821] | 3082 | if (tp != e.linep)
|
---|
| 3083 | *tp++ = '/';
|
---|
| 3084 | for (i = 0; (*tp++ = c[i++]) != '\0';);
|
---|
| 3085 |
|
---|
| 3086 | DBGPRINTF3(("REXECVE: e.linep is %s\n", e.linep));
|
---|
| 3087 |
|
---|
| 3088 | execve(e.linep, v, envp);
|
---|
| 3089 |
|
---|
| 3090 | switch (errno) {
|
---|
| 3091 | case ENOEXEC:
|
---|
| 3092 | *v = e.linep;
|
---|
| 3093 | tp = *--v;
|
---|
| 3094 | *v = e.linep;
|
---|
| 3095 | execve(DEFAULT_SHELL, v, envp);
|
---|
| 3096 | *v = tp;
|
---|
[1770] | 3097 | return "no Shell";
|
---|
[821] | 3098 |
|
---|
| 3099 | case ENOMEM:
|
---|
[1770] | 3100 | return (char *) bb_msg_memory_exhausted;
|
---|
[821] | 3101 |
|
---|
| 3102 | case E2BIG:
|
---|
[1770] | 3103 | return "argument list too long";
|
---|
[821] | 3104 |
|
---|
| 3105 | case EACCES:
|
---|
| 3106 | eacces++;
|
---|
| 3107 | break;
|
---|
| 3108 | }
|
---|
| 3109 | }
|
---|
[1770] | 3110 | return errno == ENOENT ? "not found" : "cannot execute";
|
---|
[821] | 3111 | }
|
---|
| 3112 |
|
---|
| 3113 | /*
|
---|
| 3114 | * Run the command produced by generator `f'
|
---|
| 3115 | * applied to stream `arg'.
|
---|
| 3116 | */
|
---|
| 3117 | static int run(struct ioarg *argp, int (*f) (struct ioarg *))
|
---|
| 3118 | {
|
---|
| 3119 | struct op *otree;
|
---|
| 3120 | struct wdblock *swdlist;
|
---|
| 3121 | struct wdblock *siolist;
|
---|
| 3122 | jmp_buf ev, rt;
|
---|
| 3123 | xint *ofail;
|
---|
| 3124 | int rv;
|
---|
| 3125 |
|
---|
| 3126 | #if __GNUC__
|
---|
| 3127 | /* Avoid longjmp clobbering */
|
---|
| 3128 | (void) &rv;
|
---|
| 3129 | #endif
|
---|
| 3130 |
|
---|
| 3131 | DBGPRINTF(("RUN: enter, areanum %d, outtree %p, failpt %p\n",
|
---|
| 3132 | areanum, outtree, failpt));
|
---|
| 3133 |
|
---|
| 3134 | areanum++;
|
---|
| 3135 | swdlist = wdlist;
|
---|
| 3136 | siolist = iolist;
|
---|
| 3137 | otree = outtree;
|
---|
| 3138 | ofail = failpt;
|
---|
| 3139 | rv = -1;
|
---|
| 3140 |
|
---|
[1770] | 3141 | errpt = ev;
|
---|
| 3142 | if (newenv(setjmp(errpt)) == 0) {
|
---|
[821] | 3143 | wdlist = 0;
|
---|
| 3144 | iolist = 0;
|
---|
| 3145 | pushio(argp, f);
|
---|
| 3146 | e.iobase = e.iop;
|
---|
| 3147 | yynerrs = 0;
|
---|
[1770] | 3148 | failpt = rt;
|
---|
| 3149 | if (setjmp(failpt) == 0 && yyparse() == 0)
|
---|
[821] | 3150 | rv = execute(outtree, NOPIPE, NOPIPE, 0);
|
---|
| 3151 | quitenv();
|
---|
| 3152 | } else {
|
---|
| 3153 | DBGPRINTF(("RUN: error from newenv()!\n"));
|
---|
| 3154 | }
|
---|
| 3155 |
|
---|
| 3156 | wdlist = swdlist;
|
---|
| 3157 | iolist = siolist;
|
---|
| 3158 | failpt = ofail;
|
---|
| 3159 | outtree = otree;
|
---|
| 3160 | freearea(areanum--);
|
---|
| 3161 |
|
---|
[1770] | 3162 | return rv;
|
---|
[821] | 3163 | }
|
---|
| 3164 |
|
---|
| 3165 | /* -------- do.c -------- */
|
---|
| 3166 |
|
---|
| 3167 | /*
|
---|
| 3168 | * built-in commands: doX
|
---|
| 3169 | */
|
---|
| 3170 |
|
---|
| 3171 | static int dohelp(struct op *t)
|
---|
| 3172 | {
|
---|
| 3173 | int col;
|
---|
| 3174 | const struct builtincmd *x;
|
---|
| 3175 |
|
---|
[1770] | 3176 | puts("\nBuilt-in commands:\n"
|
---|
| 3177 | "-------------------");
|
---|
[821] | 3178 |
|
---|
[1770] | 3179 | col = 0;
|
---|
| 3180 | x = builtincmds;
|
---|
| 3181 | while (x->name) {
|
---|
| 3182 | col += printf("%c%s", ((col == 0) ? '\t' : ' '), x->name);
|
---|
[821] | 3183 | if (col > 60) {
|
---|
[1770] | 3184 | puts("");
|
---|
[821] | 3185 | col = 0;
|
---|
| 3186 | }
|
---|
[1770] | 3187 | x++;
|
---|
[821] | 3188 | }
|
---|
[1770] | 3189 | #if ENABLE_FEATURE_SH_STANDALONE
|
---|
[821] | 3190 | {
|
---|
[1770] | 3191 | const struct bb_applet *applet = applets;
|
---|
[821] | 3192 |
|
---|
[1770] | 3193 | while (applet->name) {
|
---|
| 3194 | col += printf("%c%s", ((col == 0) ? '\t' : ' '), applet->name);
|
---|
[821] | 3195 | if (col > 60) {
|
---|
[1770] | 3196 | puts("");
|
---|
[821] | 3197 | col = 0;
|
---|
| 3198 | }
|
---|
[1770] | 3199 | applet++;
|
---|
[821] | 3200 | }
|
---|
| 3201 | }
|
---|
| 3202 | #endif
|
---|
[1770] | 3203 | puts("\n");
|
---|
[821] | 3204 | return EXIT_SUCCESS;
|
---|
| 3205 | }
|
---|
| 3206 |
|
---|
| 3207 | static int dolabel(struct op *t)
|
---|
| 3208 | {
|
---|
[1770] | 3209 | return 0;
|
---|
[821] | 3210 | }
|
---|
| 3211 |
|
---|
[1770] | 3212 | static int dochdir(struct op *t)
|
---|
[821] | 3213 | {
|
---|
[1770] | 3214 | const char *cp, *er;
|
---|
[821] | 3215 |
|
---|
[1770] | 3216 | cp = t->words[1];
|
---|
| 3217 | if (cp == NULL) {
|
---|
| 3218 | cp = homedir->value;
|
---|
| 3219 | if (cp != NULL)
|
---|
| 3220 | goto do_cd;
|
---|
[821] | 3221 | er = ": no home directory";
|
---|
[1770] | 3222 | } else {
|
---|
| 3223 | do_cd:
|
---|
| 3224 | if (chdir(cp) >= 0)
|
---|
| 3225 | return 0;
|
---|
[821] | 3226 | er = ": bad directory";
|
---|
[1770] | 3227 | }
|
---|
[821] | 3228 | prs(cp != NULL ? cp : "cd");
|
---|
| 3229 | err(er);
|
---|
[1770] | 3230 | return 1;
|
---|
[821] | 3231 | }
|
---|
| 3232 |
|
---|
[1770] | 3233 | static int doshift(struct op *t)
|
---|
[821] | 3234 | {
|
---|
[1770] | 3235 | int n;
|
---|
[821] | 3236 |
|
---|
| 3237 | n = t->words[1] ? getn(t->words[1]) : 1;
|
---|
| 3238 | if (dolc < n) {
|
---|
| 3239 | err("nothing to shift");
|
---|
[1770] | 3240 | return 1;
|
---|
[821] | 3241 | }
|
---|
| 3242 | dolv[n] = dolv[0];
|
---|
| 3243 | dolv += n;
|
---|
| 3244 | dolc -= n;
|
---|
| 3245 | setval(lookup("#"), putn(dolc));
|
---|
[1770] | 3246 | return 0;
|
---|
[821] | 3247 | }
|
---|
| 3248 |
|
---|
| 3249 | /*
|
---|
| 3250 | * execute login and newgrp directly
|
---|
| 3251 | */
|
---|
| 3252 | static int dologin(struct op *t)
|
---|
| 3253 | {
|
---|
[1770] | 3254 | const char *cp;
|
---|
[821] | 3255 |
|
---|
| 3256 | if (interactive) {
|
---|
| 3257 | signal(SIGINT, SIG_DFL);
|
---|
| 3258 | signal(SIGQUIT, SIG_DFL);
|
---|
| 3259 | }
|
---|
| 3260 | cp = rexecve(t->words[0], t->words, makenv(0, NULL));
|
---|
| 3261 | prs(t->words[0]);
|
---|
| 3262 | prs(": ");
|
---|
| 3263 | err(cp);
|
---|
[1770] | 3264 | return 1;
|
---|
[821] | 3265 | }
|
---|
| 3266 |
|
---|
[1770] | 3267 | static int doumask(struct op *t)
|
---|
[821] | 3268 | {
|
---|
[1770] | 3269 | int i, n;
|
---|
| 3270 | char *cp;
|
---|
[821] | 3271 |
|
---|
[1770] | 3272 | cp = t->words[1];
|
---|
| 3273 | if (cp == NULL) {
|
---|
[821] | 3274 | i = umask(0);
|
---|
| 3275 | umask(i);
|
---|
| 3276 | for (n = 3 * 4; (n -= 3) >= 0;)
|
---|
| 3277 | putc('0' + ((i >> n) & 07), stderr);
|
---|
| 3278 | putc('\n', stderr);
|
---|
| 3279 | } else {
|
---|
[1770] | 3280 | /* huh??? '8','9' are not allowed! */
|
---|
[821] | 3281 | for (n = 0; *cp >= '0' && *cp <= '9'; cp++)
|
---|
| 3282 | n = n * 8 + (*cp - '0');
|
---|
| 3283 | umask(n);
|
---|
| 3284 | }
|
---|
[1770] | 3285 | return 0;
|
---|
[821] | 3286 | }
|
---|
| 3287 |
|
---|
[1770] | 3288 | static int doexec(struct op *t)
|
---|
[821] | 3289 | {
|
---|
[1770] | 3290 | int i;
|
---|
[821] | 3291 | jmp_buf ex;
|
---|
| 3292 | xint *ofail;
|
---|
| 3293 |
|
---|
| 3294 | t->ioact = NULL;
|
---|
| 3295 | for (i = 0; (t->words[i] = t->words[i + 1]) != NULL; i++);
|
---|
| 3296 | if (i == 0)
|
---|
[1770] | 3297 | return 1;
|
---|
[821] | 3298 | execflg = 1;
|
---|
| 3299 | ofail = failpt;
|
---|
[1770] | 3300 | failpt = ex;
|
---|
| 3301 | if (setjmp(failpt) == 0)
|
---|
[821] | 3302 | execute(t, NOPIPE, NOPIPE, FEXEC);
|
---|
| 3303 | failpt = ofail;
|
---|
| 3304 | execflg = 0;
|
---|
[1770] | 3305 | return 1;
|
---|
[821] | 3306 | }
|
---|
| 3307 |
|
---|
| 3308 | static int dodot(struct op *t)
|
---|
| 3309 | {
|
---|
[1770] | 3310 | int i;
|
---|
| 3311 | const char *sp;
|
---|
| 3312 | char *tp;
|
---|
[821] | 3313 | char *cp;
|
---|
| 3314 | int maltmp;
|
---|
| 3315 |
|
---|
| 3316 | 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)));
|
---|
| 3317 |
|
---|
[1770] | 3318 | cp = t->words[1];
|
---|
| 3319 | if (cp == NULL) {
|
---|
[821] | 3320 | DBGPRINTF(("DODOT: bad args, ret 0\n"));
|
---|
[1770] | 3321 | return 0;
|
---|
[821] | 3322 | }
|
---|
[1770] | 3323 | DBGPRINTF(("DODOT: cp is %s\n", cp));
|
---|
[821] | 3324 |
|
---|
| 3325 | sp = any('/', cp) ? ":" : path->value;
|
---|
| 3326 |
|
---|
| 3327 | DBGPRINTF(("DODOT: sp is %s, e.linep is %s\n",
|
---|
| 3328 | ((sp == NULL) ? "NULL" : sp),
|
---|
| 3329 | ((e.linep == NULL) ? "NULL" : e.linep)));
|
---|
| 3330 |
|
---|
| 3331 | while (*sp) {
|
---|
| 3332 | tp = e.linep;
|
---|
| 3333 | while (*sp && (*tp = *sp++) != ':')
|
---|
| 3334 | tp++;
|
---|
| 3335 | if (tp != e.linep)
|
---|
| 3336 | *tp++ = '/';
|
---|
| 3337 |
|
---|
| 3338 | for (i = 0; (*tp++ = cp[i++]) != '\0';);
|
---|
| 3339 |
|
---|
| 3340 | /* Original code */
|
---|
[1770] | 3341 | i = open(e.linep, O_RDONLY);
|
---|
| 3342 | if (i >= 0) {
|
---|
[821] | 3343 | exstat = 0;
|
---|
| 3344 | maltmp = remap(i);
|
---|
| 3345 | DBGPRINTF(("DODOT: remap=%d, exstat=%d, e.iofd %d, i %d, e.linep is %s\n", maltmp, exstat, e.iofd, i, e.linep));
|
---|
| 3346 |
|
---|
| 3347 | next(maltmp); /* Basically a PUSHIO */
|
---|
| 3348 |
|
---|
| 3349 | DBGPRINTF(("DODOT: returning exstat=%d\n", exstat));
|
---|
| 3350 |
|
---|
[1770] | 3351 | return exstat;
|
---|
[821] | 3352 | }
|
---|
[1770] | 3353 | } /* while */
|
---|
[821] | 3354 |
|
---|
| 3355 | prs(cp);
|
---|
| 3356 | err(": not found");
|
---|
| 3357 |
|
---|
[1770] | 3358 | return -1;
|
---|
[821] | 3359 | }
|
---|
| 3360 |
|
---|
| 3361 | static int dowait(struct op *t)
|
---|
| 3362 | {
|
---|
[1770] | 3363 | int i;
|
---|
| 3364 | char *cp;
|
---|
[821] | 3365 |
|
---|
[1770] | 3366 | cp = t->words[1];
|
---|
| 3367 | if (cp != NULL) {
|
---|
[821] | 3368 | i = getn(cp);
|
---|
| 3369 | if (i == 0)
|
---|
[1770] | 3370 | return 0;
|
---|
[821] | 3371 | } else
|
---|
| 3372 | i = -1;
|
---|
| 3373 | setstatus(waitfor(i, 1));
|
---|
[1770] | 3374 | return 0;
|
---|
[821] | 3375 | }
|
---|
| 3376 |
|
---|
| 3377 | static int doread(struct op *t)
|
---|
| 3378 | {
|
---|
[1770] | 3379 | char *cp, **wp;
|
---|
| 3380 | int nb = 0;
|
---|
| 3381 | int nl = 0;
|
---|
[821] | 3382 |
|
---|
| 3383 | if (t->words[1] == NULL) {
|
---|
| 3384 | err("Usage: read name ...");
|
---|
[1770] | 3385 | return 1;
|
---|
[821] | 3386 | }
|
---|
| 3387 | for (wp = t->words + 1; *wp; wp++) {
|
---|
[1770] | 3388 | for (cp = e.linep; !nl && cp < elinep - 1; cp++) {
|
---|
| 3389 | nb = read(0, cp, sizeof(*cp));
|
---|
| 3390 | if (nb != sizeof(*cp))
|
---|
[821] | 3391 | break;
|
---|
[1770] | 3392 | nl = (*cp == '\n');
|
---|
| 3393 | if (nl || (wp[1] && any(*cp, ifs->value)))
|
---|
| 3394 | break;
|
---|
| 3395 | }
|
---|
| 3396 | *cp = '\0';
|
---|
[821] | 3397 | if (nb <= 0)
|
---|
| 3398 | break;
|
---|
| 3399 | setval(lookup(*wp), e.linep);
|
---|
| 3400 | }
|
---|
[1770] | 3401 | return nb <= 0;
|
---|
[821] | 3402 | }
|
---|
| 3403 |
|
---|
[1770] | 3404 | static int doeval(struct op *t)
|
---|
[821] | 3405 | {
|
---|
[1770] | 3406 | return RUN(awordlist, t->words + 1, wdchar);
|
---|
[821] | 3407 | }
|
---|
| 3408 |
|
---|
[1770] | 3409 | static int dotrap(struct op *t)
|
---|
[821] | 3410 | {
|
---|
[1770] | 3411 | int n, i;
|
---|
| 3412 | int resetsig;
|
---|
[821] | 3413 |
|
---|
| 3414 | if (t->words[1] == NULL) {
|
---|
| 3415 | for (i = 0; i <= _NSIG; i++)
|
---|
| 3416 | if (trap[i]) {
|
---|
| 3417 | prn(i);
|
---|
| 3418 | prs(": ");
|
---|
| 3419 | prs(trap[i]);
|
---|
| 3420 | prs("\n");
|
---|
| 3421 | }
|
---|
[1770] | 3422 | return 0;
|
---|
[821] | 3423 | }
|
---|
| 3424 | resetsig = isdigit(*t->words[1]);
|
---|
| 3425 | for (i = resetsig ? 1 : 2; t->words[i] != NULL; ++i) {
|
---|
| 3426 | n = getsig(t->words[i]);
|
---|
| 3427 | freecell(trap[n]);
|
---|
| 3428 | trap[n] = 0;
|
---|
| 3429 | if (!resetsig) {
|
---|
| 3430 | if (*t->words[1] != '\0') {
|
---|
| 3431 | trap[n] = strsave(t->words[1], 0);
|
---|
| 3432 | setsig(n, sig);
|
---|
| 3433 | } else
|
---|
| 3434 | setsig(n, SIG_IGN);
|
---|
| 3435 | } else {
|
---|
[1770] | 3436 | if (interactive) {
|
---|
[821] | 3437 | if (n == SIGINT)
|
---|
| 3438 | setsig(n, onintr);
|
---|
| 3439 | else
|
---|
| 3440 | setsig(n, n == SIGQUIT ? SIG_IGN : SIG_DFL);
|
---|
[1770] | 3441 | } else
|
---|
[821] | 3442 | setsig(n, SIG_DFL);
|
---|
| 3443 | }
|
---|
| 3444 | }
|
---|
[1770] | 3445 | return 0;
|
---|
[821] | 3446 | }
|
---|
| 3447 |
|
---|
| 3448 | static int getsig(char *s)
|
---|
| 3449 | {
|
---|
[1770] | 3450 | int n;
|
---|
[821] | 3451 |
|
---|
[1770] | 3452 | n = getn(s);
|
---|
| 3453 | if (n < 0 || n > _NSIG) {
|
---|
[821] | 3454 | err("trap: bad signal number");
|
---|
| 3455 | n = 0;
|
---|
| 3456 | }
|
---|
[1770] | 3457 | return n;
|
---|
[821] | 3458 | }
|
---|
| 3459 |
|
---|
[1770] | 3460 | static void setsig(int n, sighandler_t f)
|
---|
[821] | 3461 | {
|
---|
| 3462 | if (n == 0)
|
---|
| 3463 | return;
|
---|
| 3464 | if (signal(n, SIG_IGN) != SIG_IGN || ourtrap[n]) {
|
---|
| 3465 | ourtrap[n] = 1;
|
---|
| 3466 | signal(n, f);
|
---|
| 3467 | }
|
---|
| 3468 | }
|
---|
| 3469 |
|
---|
| 3470 | static int getn(char *as)
|
---|
| 3471 | {
|
---|
[1770] | 3472 | char *s;
|
---|
| 3473 | int n, m;
|
---|
[821] | 3474 |
|
---|
| 3475 | s = as;
|
---|
| 3476 | m = 1;
|
---|
| 3477 | if (*s == '-') {
|
---|
| 3478 | m = -1;
|
---|
| 3479 | s++;
|
---|
| 3480 | }
|
---|
| 3481 | for (n = 0; isdigit(*s); s++)
|
---|
| 3482 | n = (n * 10) + (*s - '0');
|
---|
| 3483 | if (*s) {
|
---|
| 3484 | prs(as);
|
---|
| 3485 | err(": bad number");
|
---|
| 3486 | }
|
---|
[1770] | 3487 | return n * m;
|
---|
[821] | 3488 | }
|
---|
| 3489 |
|
---|
| 3490 | static int dobreak(struct op *t)
|
---|
| 3491 | {
|
---|
[1770] | 3492 | return brkcontin(t->words[1], 1);
|
---|
[821] | 3493 | }
|
---|
| 3494 |
|
---|
| 3495 | static int docontinue(struct op *t)
|
---|
| 3496 | {
|
---|
[1770] | 3497 | return brkcontin(t->words[1], 0);
|
---|
[821] | 3498 | }
|
---|
| 3499 |
|
---|
[1770] | 3500 | static int brkcontin(char *cp, int val)
|
---|
[821] | 3501 | {
|
---|
[1770] | 3502 | struct brkcon *bc;
|
---|
| 3503 | int nl;
|
---|
[821] | 3504 |
|
---|
| 3505 | nl = cp == NULL ? 1 : getn(cp);
|
---|
| 3506 | if (nl <= 0)
|
---|
| 3507 | nl = 999;
|
---|
| 3508 | do {
|
---|
[1770] | 3509 | bc = brklist;
|
---|
| 3510 | if (bc == NULL)
|
---|
[821] | 3511 | break;
|
---|
| 3512 | brklist = bc->nextlev;
|
---|
| 3513 | } while (--nl);
|
---|
| 3514 | if (nl) {
|
---|
| 3515 | err("bad break/continue level");
|
---|
[1770] | 3516 | return 1;
|
---|
[821] | 3517 | }
|
---|
| 3518 | isbreak = val;
|
---|
| 3519 | longjmp(bc->brkpt, 1);
|
---|
| 3520 | /* NOTREACHED */
|
---|
| 3521 | }
|
---|
| 3522 |
|
---|
| 3523 | static int doexit(struct op *t)
|
---|
| 3524 | {
|
---|
[1770] | 3525 | char *cp;
|
---|
[821] | 3526 |
|
---|
| 3527 | execflg = 0;
|
---|
[1770] | 3528 | cp = t->words[1];
|
---|
| 3529 | if (cp != NULL)
|
---|
[821] | 3530 | setstatus(getn(cp));
|
---|
| 3531 |
|
---|
| 3532 | DBGPRINTF(("DOEXIT: calling leave(), t=%p\n", t));
|
---|
| 3533 |
|
---|
| 3534 | leave();
|
---|
| 3535 | /* NOTREACHED */
|
---|
[1770] | 3536 | return 0;
|
---|
[821] | 3537 | }
|
---|
| 3538 |
|
---|
| 3539 | static int doexport(struct op *t)
|
---|
| 3540 | {
|
---|
| 3541 | rdexp(t->words + 1, export, EXPORT);
|
---|
[1770] | 3542 | return 0;
|
---|
[821] | 3543 | }
|
---|
| 3544 |
|
---|
| 3545 | static int doreadonly(struct op *t)
|
---|
| 3546 | {
|
---|
| 3547 | rdexp(t->words + 1, ronly, RONLY);
|
---|
[1770] | 3548 | return 0;
|
---|
[821] | 3549 | }
|
---|
| 3550 |
|
---|
| 3551 | static void rdexp(char **wp, void (*f) (struct var *), int key)
|
---|
| 3552 | {
|
---|
| 3553 | DBGPRINTF6(("RDEXP: enter, wp=%p, func=%p, key=%d\n", wp, f, key));
|
---|
| 3554 | DBGPRINTF6(("RDEXP: *wp=%s\n", *wp));
|
---|
| 3555 |
|
---|
| 3556 | if (*wp != NULL) {
|
---|
| 3557 | for (; *wp != NULL; wp++) {
|
---|
| 3558 | if (isassign(*wp)) {
|
---|
| 3559 | char *cp;
|
---|
| 3560 |
|
---|
| 3561 | assign(*wp, COPYV);
|
---|
| 3562 | for (cp = *wp; *cp != '='; cp++);
|
---|
| 3563 | *cp = '\0';
|
---|
| 3564 | }
|
---|
| 3565 | if (checkname(*wp))
|
---|
| 3566 | (*f) (lookup(*wp));
|
---|
| 3567 | else
|
---|
| 3568 | badid(*wp);
|
---|
| 3569 | }
|
---|
| 3570 | } else
|
---|
| 3571 | putvlist(key, 1);
|
---|
| 3572 | }
|
---|
| 3573 |
|
---|
[1770] | 3574 | static void badid(char *s)
|
---|
[821] | 3575 | {
|
---|
| 3576 | prs(s);
|
---|
| 3577 | err(": bad identifier");
|
---|
| 3578 | }
|
---|
| 3579 |
|
---|
[1770] | 3580 | static int doset(struct op *t)
|
---|
[821] | 3581 | {
|
---|
[1770] | 3582 | struct var *vp;
|
---|
| 3583 | char *cp;
|
---|
| 3584 | int n;
|
---|
[821] | 3585 |
|
---|
[1770] | 3586 | cp = t->words[1];
|
---|
| 3587 | if (cp == NULL) {
|
---|
[821] | 3588 | for (vp = vlist; vp; vp = vp->next)
|
---|
| 3589 | varput(vp->name, 1);
|
---|
[1770] | 3590 | return 0;
|
---|
[821] | 3591 | }
|
---|
| 3592 | if (*cp == '-') {
|
---|
| 3593 | /* bad: t->words++; */
|
---|
| 3594 | for (n = 0; (t->words[n] = t->words[n + 1]) != NULL; n++);
|
---|
| 3595 | if (*++cp == 0)
|
---|
[1770] | 3596 | FLAG['x'] = FLAG['v'] = 0;
|
---|
| 3597 | else {
|
---|
| 3598 | for (; *cp; cp++) {
|
---|
[821] | 3599 | switch (*cp) {
|
---|
| 3600 | case 'e':
|
---|
| 3601 | if (!interactive)
|
---|
[1770] | 3602 | FLAG['e']++;
|
---|
[821] | 3603 | break;
|
---|
| 3604 |
|
---|
| 3605 | default:
|
---|
| 3606 | if (*cp >= 'a' && *cp <= 'z')
|
---|
[1770] | 3607 | FLAG[(int) *cp]++;
|
---|
[821] | 3608 | break;
|
---|
| 3609 | }
|
---|
[1770] | 3610 | }
|
---|
| 3611 | }
|
---|
[821] | 3612 | setdash();
|
---|
| 3613 | }
|
---|
| 3614 | if (t->words[1]) {
|
---|
| 3615 | t->words[0] = dolv[0];
|
---|
| 3616 | for (n = 1; t->words[n]; n++)
|
---|
| 3617 | setarea((char *) t->words[n], 0);
|
---|
| 3618 | dolc = n - 1;
|
---|
| 3619 | dolv = t->words;
|
---|
| 3620 | setval(lookup("#"), putn(dolc));
|
---|
| 3621 | setarea((char *) (dolv - 1), 0);
|
---|
| 3622 | }
|
---|
[1770] | 3623 | return 0;
|
---|
[821] | 3624 | }
|
---|
| 3625 |
|
---|
[1770] | 3626 | static void varput(char *s, int out)
|
---|
[821] | 3627 | {
|
---|
| 3628 | if (isalnum(*s) || *s == '_') {
|
---|
| 3629 | write(out, s, strlen(s));
|
---|
| 3630 | write(out, "\n", 1);
|
---|
| 3631 | }
|
---|
| 3632 | }
|
---|
| 3633 |
|
---|
| 3634 |
|
---|
| 3635 | /*
|
---|
| 3636 | * Copyright (c) 1999 Herbert Xu <herbert@debian.org>
|
---|
| 3637 | * This file contains code for the times builtin.
|
---|
| 3638 | */
|
---|
| 3639 | static int dotimes(struct op *t)
|
---|
| 3640 | {
|
---|
| 3641 | struct tms buf;
|
---|
[1770] | 3642 | long clk_tck = sysconf(_SC_CLK_TCK);
|
---|
[821] | 3643 |
|
---|
| 3644 | times(&buf);
|
---|
| 3645 | printf("%dm%fs %dm%fs\n%dm%fs %dm%fs\n",
|
---|
| 3646 | (int) (buf.tms_utime / clk_tck / 60),
|
---|
| 3647 | ((double) buf.tms_utime) / clk_tck,
|
---|
| 3648 | (int) (buf.tms_stime / clk_tck / 60),
|
---|
| 3649 | ((double) buf.tms_stime) / clk_tck,
|
---|
| 3650 | (int) (buf.tms_cutime / clk_tck / 60),
|
---|
| 3651 | ((double) buf.tms_cutime) / clk_tck,
|
---|
| 3652 | (int) (buf.tms_cstime / clk_tck / 60),
|
---|
| 3653 | ((double) buf.tms_cstime) / clk_tck);
|
---|
| 3654 | return 0;
|
---|
| 3655 | }
|
---|
| 3656 |
|
---|
| 3657 |
|
---|
| 3658 | /* -------- eval.c -------- */
|
---|
| 3659 |
|
---|
| 3660 | /*
|
---|
| 3661 | * ${}
|
---|
| 3662 | * `command`
|
---|
| 3663 | * blank interpretation
|
---|
| 3664 | * quoting
|
---|
| 3665 | * glob
|
---|
| 3666 | */
|
---|
| 3667 |
|
---|
| 3668 | static char **eval(char **ap, int f)
|
---|
| 3669 | {
|
---|
| 3670 | struct wdblock *wb;
|
---|
| 3671 | char **wp;
|
---|
| 3672 | char **wf;
|
---|
| 3673 | jmp_buf ev;
|
---|
| 3674 |
|
---|
| 3675 | #if __GNUC__
|
---|
| 3676 | /* Avoid longjmp clobbering */
|
---|
| 3677 | (void) ℘
|
---|
| 3678 | (void) ≈
|
---|
| 3679 | #endif
|
---|
| 3680 |
|
---|
| 3681 | DBGPRINTF4(("EVAL: enter, f=%d\n", f));
|
---|
| 3682 |
|
---|
| 3683 | wp = NULL;
|
---|
| 3684 | wb = NULL;
|
---|
| 3685 | wf = NULL;
|
---|
[1770] | 3686 | errpt = ev;
|
---|
| 3687 | if (newenv(setjmp(errpt)) == 0) {
|
---|
[821] | 3688 | while (*ap && isassign(*ap))
|
---|
| 3689 | expand(*ap++, &wb, f & ~DOGLOB);
|
---|
[1770] | 3690 | if (FLAG['k']) {
|
---|
[821] | 3691 | for (wf = ap; *wf; wf++) {
|
---|
| 3692 | if (isassign(*wf))
|
---|
| 3693 | expand(*wf, &wb, f & ~DOGLOB);
|
---|
| 3694 | }
|
---|
| 3695 | }
|
---|
| 3696 | for (wb = addword((char *) 0, wb); *ap; ap++) {
|
---|
[1770] | 3697 | if (!FLAG['k'] || !isassign(*ap))
|
---|
[821] | 3698 | expand(*ap, &wb, f & ~DOKEY);
|
---|
| 3699 | }
|
---|
| 3700 | wb = addword((char *) 0, wb);
|
---|
| 3701 | wp = getwords(wb);
|
---|
| 3702 | quitenv();
|
---|
| 3703 | } else
|
---|
| 3704 | gflg = 1;
|
---|
| 3705 |
|
---|
[1770] | 3706 | return gflg ? (char **) NULL : wp;
|
---|
[821] | 3707 | }
|
---|
| 3708 |
|
---|
[1770] | 3709 |
|
---|
[821] | 3710 | /*
|
---|
| 3711 | * Make the exported environment from the exported
|
---|
| 3712 | * names in the dictionary. Keyword assignments
|
---|
| 3713 | * will already have been done.
|
---|
| 3714 | */
|
---|
| 3715 | static char **makenv(int all, struct wdblock *wb)
|
---|
| 3716 | {
|
---|
[1770] | 3717 | struct var *vp;
|
---|
[821] | 3718 |
|
---|
| 3719 | DBGPRINTF5(("MAKENV: enter, all=%d\n", all));
|
---|
| 3720 |
|
---|
| 3721 | for (vp = vlist; vp; vp = vp->next)
|
---|
| 3722 | if (all || vp->status & EXPORT)
|
---|
| 3723 | wb = addword(vp->name, wb);
|
---|
| 3724 | wb = addword((char *) 0, wb);
|
---|
[1770] | 3725 | return getwords(wb);
|
---|
[821] | 3726 | }
|
---|
| 3727 |
|
---|
[1770] | 3728 | static int expand(const char *cp, struct wdblock **wbp, int f)
|
---|
[821] | 3729 | {
|
---|
| 3730 | jmp_buf ev;
|
---|
[1770] | 3731 | char *xp;
|
---|
[821] | 3732 |
|
---|
| 3733 | #if __GNUC__
|
---|
| 3734 | /* Avoid longjmp clobbering */
|
---|
| 3735 | (void) &cp;
|
---|
| 3736 | #endif
|
---|
| 3737 |
|
---|
| 3738 | DBGPRINTF3(("EXPAND: enter, f=%d\n", f));
|
---|
| 3739 |
|
---|
| 3740 | gflg = 0;
|
---|
| 3741 |
|
---|
| 3742 | if (cp == NULL)
|
---|
[1770] | 3743 | return 0;
|
---|
[821] | 3744 |
|
---|
[1770] | 3745 | if (!anys("$`'\"", cp) && !anys(ifs->value, cp)
|
---|
| 3746 | && ((f & DOGLOB) == 0 || !anys("[*?", cp))
|
---|
| 3747 | ) {
|
---|
| 3748 | xp = strsave(cp, areanum);
|
---|
[821] | 3749 | if (f & DOTRIM)
|
---|
[1770] | 3750 | unquote(xp);
|
---|
| 3751 | *wbp = addword(xp, *wbp);
|
---|
| 3752 | return 1;
|
---|
[821] | 3753 | }
|
---|
[1770] | 3754 | errpt = ev;
|
---|
| 3755 | if (newenv(setjmp(errpt)) == 0) {
|
---|
[821] | 3756 | PUSHIO(aword, cp, strchar);
|
---|
| 3757 | e.iobase = e.iop;
|
---|
[1770] | 3758 | while ((xp = blank(f)) && gflg == 0) {
|
---|
| 3759 | e.linep = xp;
|
---|
| 3760 | xp = strsave(xp, areanum);
|
---|
[821] | 3761 | if ((f & DOGLOB) == 0) {
|
---|
| 3762 | if (f & DOTRIM)
|
---|
[1770] | 3763 | unquote(xp);
|
---|
| 3764 | *wbp = addword(xp, *wbp);
|
---|
[821] | 3765 | } else
|
---|
[1770] | 3766 | *wbp = glob(xp, *wbp);
|
---|
[821] | 3767 | }
|
---|
| 3768 | quitenv();
|
---|
| 3769 | } else
|
---|
| 3770 | gflg = 1;
|
---|
[1770] | 3771 | return gflg == 0;
|
---|
[821] | 3772 | }
|
---|
| 3773 |
|
---|
[1770] | 3774 | static char *evalstr(char *cp, int f)
|
---|
| 3775 | {
|
---|
| 3776 | struct wdblock *wb;
|
---|
| 3777 |
|
---|
| 3778 | DBGPRINTF6(("EVALSTR: enter, cp=%p, f=%d\n", cp, f));
|
---|
| 3779 |
|
---|
| 3780 | wb = NULL;
|
---|
| 3781 | if (expand(cp, &wb, f)) {
|
---|
| 3782 | if (wb == NULL || wb->w_nword == 0
|
---|
| 3783 | || (cp = wb->w_words[0]) == NULL
|
---|
| 3784 | ) {
|
---|
| 3785 | // TODO: I suspect that
|
---|
| 3786 | // char *evalstr(char *cp, int f) is actually
|
---|
| 3787 | // const char *evalstr(const char *cp, int f)!
|
---|
| 3788 | cp = (char*)"";
|
---|
| 3789 | }
|
---|
| 3790 | DELETE(wb);
|
---|
| 3791 | } else
|
---|
| 3792 | cp = NULL;
|
---|
| 3793 | return cp;
|
---|
| 3794 | }
|
---|
| 3795 |
|
---|
| 3796 |
|
---|
[821] | 3797 | /*
|
---|
| 3798 | * Blank interpretation and quoting
|
---|
| 3799 | */
|
---|
| 3800 | static char *blank(int f)
|
---|
| 3801 | {
|
---|
[1770] | 3802 | int c, c1;
|
---|
| 3803 | char *sp;
|
---|
[821] | 3804 | int scanequals, foundequals;
|
---|
| 3805 |
|
---|
| 3806 | DBGPRINTF3(("BLANK: enter, f=%d\n", f));
|
---|
| 3807 |
|
---|
| 3808 | sp = e.linep;
|
---|
| 3809 | scanequals = f & DOKEY;
|
---|
| 3810 | foundequals = 0;
|
---|
| 3811 |
|
---|
[1770] | 3812 | loop:
|
---|
| 3813 | c = subgetc('"', foundequals);
|
---|
| 3814 | switch (c) {
|
---|
[821] | 3815 | case 0:
|
---|
| 3816 | if (sp == e.linep)
|
---|
[1770] | 3817 | return 0;
|
---|
[821] | 3818 | *e.linep++ = 0;
|
---|
[1770] | 3819 | return sp;
|
---|
[821] | 3820 |
|
---|
| 3821 | default:
|
---|
| 3822 | if (f & DOBLANK && any(c, ifs->value))
|
---|
| 3823 | goto loop;
|
---|
| 3824 | break;
|
---|
| 3825 |
|
---|
| 3826 | case '"':
|
---|
| 3827 | case '\'':
|
---|
| 3828 | scanequals = 0;
|
---|
| 3829 | if (INSUB())
|
---|
| 3830 | break;
|
---|
| 3831 | for (c1 = c; (c = subgetc(c1, 1)) != c1;) {
|
---|
| 3832 | if (c == 0)
|
---|
| 3833 | break;
|
---|
| 3834 | if (c == '\'' || !any(c, "$`\""))
|
---|
| 3835 | c |= QUOTE;
|
---|
| 3836 | *e.linep++ = c;
|
---|
| 3837 | }
|
---|
| 3838 | c = 0;
|
---|
| 3839 | }
|
---|
| 3840 | unget(c);
|
---|
| 3841 | if (!isalpha(c) && c != '_')
|
---|
| 3842 | scanequals = 0;
|
---|
| 3843 | for (;;) {
|
---|
| 3844 | c = subgetc('"', foundequals);
|
---|
| 3845 | if (c == 0 ||
|
---|
| 3846 | f & (DOBLANK && any(c, ifs->value)) ||
|
---|
| 3847 | (!INSUB() && any(c, "\"'"))) {
|
---|
| 3848 | scanequals = 0;
|
---|
| 3849 | unget(c);
|
---|
| 3850 | if (any(c, "\"'"))
|
---|
| 3851 | goto loop;
|
---|
| 3852 | break;
|
---|
| 3853 | }
|
---|
| 3854 | if (scanequals) {
|
---|
| 3855 | if (c == '=') {
|
---|
| 3856 | foundequals = 1;
|
---|
| 3857 | scanequals = 0;
|
---|
| 3858 | } else if (!isalnum(c) && c != '_')
|
---|
| 3859 | scanequals = 0;
|
---|
| 3860 | }
|
---|
| 3861 | *e.linep++ = c;
|
---|
| 3862 | }
|
---|
| 3863 | *e.linep++ = 0;
|
---|
[1770] | 3864 | return sp;
|
---|
[821] | 3865 | }
|
---|
| 3866 |
|
---|
| 3867 | /*
|
---|
| 3868 | * Get characters, substituting for ` and $
|
---|
| 3869 | */
|
---|
[1770] | 3870 | static int subgetc(char ec, int quoted)
|
---|
[821] | 3871 | {
|
---|
[1770] | 3872 | char c;
|
---|
[821] | 3873 |
|
---|
| 3874 | DBGPRINTF3(("SUBGETC: enter, quoted=%d\n", quoted));
|
---|
| 3875 |
|
---|
[1770] | 3876 | again:
|
---|
[821] | 3877 | c = my_getc(ec);
|
---|
| 3878 | if (!INSUB() && ec != '\'') {
|
---|
| 3879 | if (c == '`') {
|
---|
| 3880 | if (grave(quoted) == 0)
|
---|
[1770] | 3881 | return 0;
|
---|
[821] | 3882 | e.iop->task = XGRAVE;
|
---|
| 3883 | goto again;
|
---|
| 3884 | }
|
---|
[1770] | 3885 | if (c == '$') {
|
---|
| 3886 | c = dollar(quoted);
|
---|
| 3887 | if (c == 0) {
|
---|
| 3888 | e.iop->task = XDOLL;
|
---|
| 3889 | goto again;
|
---|
| 3890 | }
|
---|
[821] | 3891 | }
|
---|
| 3892 | }
|
---|
[1770] | 3893 | return c;
|
---|
[821] | 3894 | }
|
---|
| 3895 |
|
---|
| 3896 | /*
|
---|
| 3897 | * Prepare to generate the string returned by ${} substitution.
|
---|
| 3898 | */
|
---|
| 3899 | static int dollar(int quoted)
|
---|
| 3900 | {
|
---|
| 3901 | int otask;
|
---|
| 3902 | struct io *oiop;
|
---|
| 3903 | char *dolp;
|
---|
[1770] | 3904 | char *s, c, *cp = NULL;
|
---|
[821] | 3905 | struct var *vp;
|
---|
| 3906 |
|
---|
| 3907 | DBGPRINTF3(("DOLLAR: enter, quoted=%d\n", quoted));
|
---|
| 3908 |
|
---|
| 3909 | c = readc();
|
---|
| 3910 | s = e.linep;
|
---|
| 3911 | if (c != '{') {
|
---|
| 3912 | *e.linep++ = c;
|
---|
| 3913 | if (isalpha(c) || c == '_') {
|
---|
| 3914 | while ((c = readc()) != 0 && (isalnum(c) || c == '_'))
|
---|
| 3915 | if (e.linep < elinep)
|
---|
| 3916 | *e.linep++ = c;
|
---|
| 3917 | unget(c);
|
---|
| 3918 | }
|
---|
| 3919 | c = 0;
|
---|
| 3920 | } else {
|
---|
| 3921 | oiop = e.iop;
|
---|
| 3922 | otask = e.iop->task;
|
---|
| 3923 |
|
---|
| 3924 | e.iop->task = XOTHER;
|
---|
| 3925 | while ((c = subgetc('"', 0)) != 0 && c != '}' && c != '\n')
|
---|
| 3926 | if (e.linep < elinep)
|
---|
| 3927 | *e.linep++ = c;
|
---|
| 3928 | if (oiop == e.iop)
|
---|
| 3929 | e.iop->task = otask;
|
---|
| 3930 | if (c != '}') {
|
---|
| 3931 | err("unclosed ${");
|
---|
| 3932 | gflg++;
|
---|
[1770] | 3933 | return c;
|
---|
[821] | 3934 | }
|
---|
| 3935 | }
|
---|
| 3936 | if (e.linep >= elinep) {
|
---|
| 3937 | err("string in ${} too long");
|
---|
| 3938 | gflg++;
|
---|
| 3939 | e.linep -= 10;
|
---|
| 3940 | }
|
---|
| 3941 | *e.linep = 0;
|
---|
| 3942 | if (*s)
|
---|
| 3943 | for (cp = s + 1; *cp; cp++)
|
---|
| 3944 | if (any(*cp, "=-+?")) {
|
---|
| 3945 | c = *cp;
|
---|
| 3946 | *cp++ = 0;
|
---|
| 3947 | break;
|
---|
| 3948 | }
|
---|
| 3949 | if (s[1] == 0 && (*s == '*' || *s == '@')) {
|
---|
| 3950 | if (dolc > 1) {
|
---|
| 3951 | /* currently this does not distinguish $* and $@ */
|
---|
| 3952 | /* should check dollar */
|
---|
| 3953 | e.linep = s;
|
---|
| 3954 | PUSHIO(awordlist, dolv + 1, dolchar);
|
---|
[1770] | 3955 | return 0;
|
---|
[821] | 3956 | } else { /* trap the nasty ${=} */
|
---|
| 3957 | s[0] = '1';
|
---|
[1770] | 3958 | s[1] = '\0';
|
---|
[821] | 3959 | }
|
---|
| 3960 | }
|
---|
| 3961 | vp = lookup(s);
|
---|
[1770] | 3962 | dolp = vp->value;
|
---|
| 3963 | if (dolp == null) {
|
---|
[821] | 3964 | switch (c) {
|
---|
| 3965 | case '=':
|
---|
| 3966 | if (isdigit(*s)) {
|
---|
| 3967 | err("cannot use ${...=...} with $n");
|
---|
| 3968 | gflg++;
|
---|
| 3969 | break;
|
---|
| 3970 | }
|
---|
| 3971 | setval(vp, cp);
|
---|
| 3972 | dolp = vp->value;
|
---|
| 3973 | break;
|
---|
| 3974 |
|
---|
| 3975 | case '-':
|
---|
| 3976 | dolp = strsave(cp, areanum);
|
---|
| 3977 | break;
|
---|
| 3978 |
|
---|
| 3979 | case '?':
|
---|
| 3980 | if (*cp == 0) {
|
---|
| 3981 | prs("missing value for ");
|
---|
| 3982 | err(s);
|
---|
| 3983 | } else
|
---|
| 3984 | err(cp);
|
---|
| 3985 | gflg++;
|
---|
| 3986 | break;
|
---|
| 3987 | }
|
---|
| 3988 | } else if (c == '+')
|
---|
| 3989 | dolp = strsave(cp, areanum);
|
---|
[1770] | 3990 | if (FLAG['u'] && dolp == null) {
|
---|
[821] | 3991 | prs("unset variable: ");
|
---|
| 3992 | err(s);
|
---|
| 3993 | gflg++;
|
---|
| 3994 | }
|
---|
| 3995 | e.linep = s;
|
---|
| 3996 | PUSHIO(aword, dolp, quoted ? qstrchar : strchar);
|
---|
[1770] | 3997 | return 0;
|
---|
[821] | 3998 | }
|
---|
| 3999 |
|
---|
| 4000 | /*
|
---|
| 4001 | * Run the command in `...` and read its output.
|
---|
| 4002 | */
|
---|
| 4003 |
|
---|
| 4004 | static int grave(int quoted)
|
---|
| 4005 | {
|
---|
[1770] | 4006 | /* moved to G: static char child_cmd[LINELIM]; */
|
---|
| 4007 |
|
---|
| 4008 | const char *cp;
|
---|
| 4009 | int i;
|
---|
[821] | 4010 | int j;
|
---|
| 4011 | int pf[2];
|
---|
[1770] | 4012 | const char *src;
|
---|
[821] | 4013 | char *dest;
|
---|
| 4014 | int count;
|
---|
| 4015 | int ignore;
|
---|
| 4016 | int ignore_once;
|
---|
| 4017 | char *argument_list[4];
|
---|
| 4018 | struct wdblock *wb = NULL;
|
---|
| 4019 |
|
---|
| 4020 | #if __GNUC__
|
---|
| 4021 | /* Avoid longjmp clobbering */
|
---|
| 4022 | (void) &cp;
|
---|
| 4023 | #endif
|
---|
| 4024 |
|
---|
[1770] | 4025 | for (cp = e.iop->argp->aword; *cp != '`'; cp++) {
|
---|
[821] | 4026 | if (*cp == 0) {
|
---|
| 4027 | err("no closing `");
|
---|
[1770] | 4028 | return 0;
|
---|
[821] | 4029 | }
|
---|
[1770] | 4030 | }
|
---|
[821] | 4031 |
|
---|
| 4032 | /* string copy with dollar expansion */
|
---|
| 4033 | src = e.iop->argp->aword;
|
---|
| 4034 | dest = child_cmd;
|
---|
| 4035 | count = 0;
|
---|
| 4036 | ignore = 0;
|
---|
| 4037 | ignore_once = 0;
|
---|
| 4038 | while ((*src != '`') && (count < LINELIM)) {
|
---|
| 4039 | if (*src == '\'')
|
---|
| 4040 | ignore = !ignore;
|
---|
| 4041 | if (*src == '\\')
|
---|
| 4042 | ignore_once = 1;
|
---|
| 4043 | if (*src == '$' && !ignore && !ignore_once) {
|
---|
| 4044 | struct var *vp;
|
---|
| 4045 | char var_name[LINELIM];
|
---|
| 4046 | char alt_value[LINELIM];
|
---|
| 4047 | int var_index = 0;
|
---|
| 4048 | int alt_index = 0;
|
---|
| 4049 | char operator = 0;
|
---|
| 4050 | int braces = 0;
|
---|
| 4051 | char *value;
|
---|
| 4052 |
|
---|
| 4053 | src++;
|
---|
| 4054 | if (*src == '{') {
|
---|
| 4055 | braces = 1;
|
---|
| 4056 | src++;
|
---|
| 4057 | }
|
---|
| 4058 |
|
---|
| 4059 | var_name[var_index++] = *src++;
|
---|
| 4060 | while (isalnum(*src) || *src=='_')
|
---|
| 4061 | var_name[var_index++] = *src++;
|
---|
| 4062 | var_name[var_index] = 0;
|
---|
| 4063 |
|
---|
| 4064 | if (braces) {
|
---|
| 4065 | switch (*src) {
|
---|
| 4066 | case '}':
|
---|
| 4067 | break;
|
---|
| 4068 | case '-':
|
---|
| 4069 | case '=':
|
---|
| 4070 | case '+':
|
---|
| 4071 | case '?':
|
---|
| 4072 | operator = * src;
|
---|
| 4073 | break;
|
---|
| 4074 | default:
|
---|
| 4075 | err("unclosed ${\n");
|
---|
[1770] | 4076 | return 0;
|
---|
[821] | 4077 | }
|
---|
| 4078 | if (operator) {
|
---|
| 4079 | src++;
|
---|
| 4080 | while (*src && (*src != '}')) {
|
---|
| 4081 | alt_value[alt_index++] = *src++;
|
---|
| 4082 | }
|
---|
| 4083 | alt_value[alt_index] = 0;
|
---|
| 4084 | if (*src != '}') {
|
---|
| 4085 | err("unclosed ${\n");
|
---|
[1770] | 4086 | return 0;
|
---|
[821] | 4087 | }
|
---|
| 4088 | }
|
---|
| 4089 | src++;
|
---|
| 4090 | }
|
---|
| 4091 |
|
---|
| 4092 | if (isalpha(*var_name)) {
|
---|
| 4093 | /* let subshell handle it instead */
|
---|
| 4094 |
|
---|
| 4095 | char *namep = var_name;
|
---|
| 4096 |
|
---|
| 4097 | *dest++ = '$';
|
---|
| 4098 | if (braces)
|
---|
| 4099 | *dest++ = '{';
|
---|
| 4100 | while (*namep)
|
---|
| 4101 | *dest++ = *namep++;
|
---|
| 4102 | if (operator) {
|
---|
| 4103 | char *altp = alt_value;
|
---|
| 4104 | *dest++ = operator;
|
---|
| 4105 | while (*altp)
|
---|
| 4106 | *dest++ = *altp++;
|
---|
| 4107 | }
|
---|
| 4108 | if (braces)
|
---|
| 4109 | *dest++ = '}';
|
---|
| 4110 |
|
---|
| 4111 | wb = addword(lookup(var_name)->name, wb);
|
---|
| 4112 | } else {
|
---|
| 4113 | /* expand */
|
---|
| 4114 |
|
---|
| 4115 | vp = lookup(var_name);
|
---|
| 4116 | if (vp->value != null)
|
---|
| 4117 | value = (operator == '+') ?
|
---|
| 4118 | alt_value : vp->value;
|
---|
| 4119 | else if (operator == '?') {
|
---|
| 4120 | err(alt_value);
|
---|
[1770] | 4121 | return 0;
|
---|
[821] | 4122 | } else if (alt_index && (operator != '+')) {
|
---|
| 4123 | value = alt_value;
|
---|
| 4124 | if (operator == '=')
|
---|
| 4125 | setval(vp, value);
|
---|
| 4126 | } else
|
---|
| 4127 | continue;
|
---|
| 4128 |
|
---|
| 4129 | while (*value && (count < LINELIM)) {
|
---|
| 4130 | *dest++ = *value++;
|
---|
| 4131 | count++;
|
---|
| 4132 | }
|
---|
| 4133 | }
|
---|
| 4134 | } else {
|
---|
| 4135 | *dest++ = *src++;
|
---|
| 4136 | count++;
|
---|
| 4137 | ignore_once = 0;
|
---|
| 4138 | }
|
---|
| 4139 | }
|
---|
| 4140 | *dest = '\0';
|
---|
| 4141 |
|
---|
| 4142 | if (openpipe(pf) < 0)
|
---|
[1770] | 4143 | return 0;
|
---|
[821] | 4144 |
|
---|
| 4145 | while ((i = vfork()) == -1 && errno == EAGAIN);
|
---|
| 4146 |
|
---|
| 4147 | DBGPRINTF3(("GRAVE: i is %p\n", io));
|
---|
| 4148 |
|
---|
| 4149 | if (i < 0) {
|
---|
| 4150 | closepipe(pf);
|
---|
| 4151 | err((char *) bb_msg_memory_exhausted);
|
---|
[1770] | 4152 | return 0;
|
---|
[821] | 4153 | }
|
---|
| 4154 | if (i != 0) {
|
---|
| 4155 | waitpid(i, NULL, 0);
|
---|
| 4156 | e.iop->argp->aword = ++cp;
|
---|
| 4157 | close(pf[1]);
|
---|
| 4158 | PUSHIO(afile, remap(pf[0]),
|
---|
[1770] | 4159 | (int (*)(struct ioarg *)) ((quoted) ? qgravechar : gravechar));
|
---|
| 4160 | return 1;
|
---|
[821] | 4161 | }
|
---|
| 4162 | /* allow trapped signals */
|
---|
| 4163 | /* XXX - Maybe this signal stuff should go as well? */
|
---|
| 4164 | for (j = 0; j <= _NSIG; j++)
|
---|
| 4165 | if (ourtrap[j] && signal(j, SIG_IGN) != SIG_IGN)
|
---|
| 4166 | signal(j, SIG_DFL);
|
---|
| 4167 |
|
---|
[1770] | 4168 | /* Testcase where below checks are needed:
|
---|
| 4169 | * close stdout & run this script:
|
---|
| 4170 | * files=`ls`
|
---|
| 4171 | * echo "$files" >zz
|
---|
| 4172 | */
|
---|
| 4173 | xmove_fd(pf[1], 1);
|
---|
| 4174 | if (pf[0] != 1) close(pf[0]);
|
---|
[821] | 4175 |
|
---|
| 4176 | argument_list[0] = (char *) DEFAULT_SHELL;
|
---|
[1770] | 4177 | argument_list[1] = (char *) "-c";
|
---|
[821] | 4178 | argument_list[2] = child_cmd;
|
---|
[1770] | 4179 | argument_list[3] = NULL;
|
---|
[821] | 4180 |
|
---|
| 4181 | cp = rexecve(argument_list[0], argument_list, makenv(1, wb));
|
---|
| 4182 | prs(argument_list[0]);
|
---|
| 4183 | prs(": ");
|
---|
| 4184 | err(cp);
|
---|
| 4185 | _exit(1);
|
---|
| 4186 | }
|
---|
| 4187 |
|
---|
| 4188 |
|
---|
[1770] | 4189 | static char *unquote(char *as)
|
---|
[821] | 4190 | {
|
---|
[1770] | 4191 | char *s;
|
---|
[821] | 4192 |
|
---|
[1770] | 4193 | s = as;
|
---|
| 4194 | if (s != NULL)
|
---|
[821] | 4195 | while (*s)
|
---|
| 4196 | *s++ &= ~QUOTE;
|
---|
[1770] | 4197 | return as;
|
---|
[821] | 4198 | }
|
---|
| 4199 |
|
---|
| 4200 | /* -------- glob.c -------- */
|
---|
| 4201 |
|
---|
| 4202 | /*
|
---|
| 4203 | * glob
|
---|
| 4204 | */
|
---|
| 4205 |
|
---|
| 4206 | #define scopy(x) strsave((x), areanum)
|
---|
| 4207 | #define BLKSIZ 512
|
---|
| 4208 | #define NDENT ((BLKSIZ+sizeof(struct dirent)-1)/sizeof(struct dirent))
|
---|
| 4209 |
|
---|
| 4210 | static struct wdblock *cl, *nl;
|
---|
[1770] | 4211 | static const char spcl[] ALIGN1= "[?*";
|
---|
[821] | 4212 |
|
---|
| 4213 | static struct wdblock *glob(char *cp, struct wdblock *wb)
|
---|
| 4214 | {
|
---|
[1770] | 4215 | int i;
|
---|
| 4216 | char *pp;
|
---|
[821] | 4217 |
|
---|
| 4218 | if (cp == 0)
|
---|
[1770] | 4219 | return wb;
|
---|
[821] | 4220 | i = 0;
|
---|
| 4221 | for (pp = cp; *pp; pp++)
|
---|
| 4222 | if (any(*pp, spcl))
|
---|
| 4223 | i++;
|
---|
| 4224 | else if (!any(*pp & ~QUOTE, spcl))
|
---|
| 4225 | *pp &= ~QUOTE;
|
---|
| 4226 | if (i != 0) {
|
---|
[1770] | 4227 | for (cl = addword(scopy(cp), NULL); anyspcl(cl); cl = nl) {
|
---|
[821] | 4228 | nl = newword(cl->w_nword * 2);
|
---|
| 4229 | for (i = 0; i < cl->w_nword; i++) { /* for each argument */
|
---|
| 4230 | for (pp = cl->w_words[i]; *pp; pp++)
|
---|
| 4231 | if (any(*pp, spcl)) {
|
---|
| 4232 | globname(cl->w_words[i], pp);
|
---|
| 4233 | break;
|
---|
| 4234 | }
|
---|
| 4235 | if (*pp == '\0')
|
---|
| 4236 | nl = addword(scopy(cl->w_words[i]), nl);
|
---|
| 4237 | }
|
---|
| 4238 | for (i = 0; i < cl->w_nword; i++)
|
---|
| 4239 | DELETE(cl->w_words[i]);
|
---|
| 4240 | DELETE(cl);
|
---|
| 4241 | }
|
---|
| 4242 | for (i = 0; i < cl->w_nword; i++)
|
---|
| 4243 | unquote(cl->w_words[i]);
|
---|
| 4244 | glob0((char *) cl->w_words, cl->w_nword, sizeof(char *), xstrcmp);
|
---|
| 4245 | if (cl->w_nword) {
|
---|
| 4246 | for (i = 0; i < cl->w_nword; i++)
|
---|
| 4247 | wb = addword(cl->w_words[i], wb);
|
---|
| 4248 | DELETE(cl);
|
---|
[1770] | 4249 | return wb;
|
---|
[821] | 4250 | }
|
---|
| 4251 | }
|
---|
| 4252 | wb = addword(unquote(cp), wb);
|
---|
[1770] | 4253 | return wb;
|
---|
[821] | 4254 | }
|
---|
| 4255 |
|
---|
[1770] | 4256 | static void globname(char *we, char *pp)
|
---|
[821] | 4257 | {
|
---|
[1770] | 4258 | char *np, *cp;
|
---|
[821] | 4259 | char *name, *gp, *dp;
|
---|
| 4260 | int k;
|
---|
| 4261 | DIR *dirp;
|
---|
| 4262 | struct dirent *de;
|
---|
| 4263 | char dname[NAME_MAX + 1];
|
---|
| 4264 | struct stat dbuf;
|
---|
| 4265 |
|
---|
| 4266 | for (np = we; np != pp; pp--)
|
---|
| 4267 | if (pp[-1] == '/')
|
---|
| 4268 | break;
|
---|
| 4269 | for (dp = cp = space((int) (pp - np) + 3); np < pp;)
|
---|
| 4270 | *cp++ = *np++;
|
---|
| 4271 | *cp++ = '.';
|
---|
| 4272 | *cp = '\0';
|
---|
| 4273 | for (gp = cp = space(strlen(pp) + 1); *np && *np != '/';)
|
---|
| 4274 | *cp++ = *np++;
|
---|
| 4275 | *cp = '\0';
|
---|
| 4276 | dirp = opendir(dp);
|
---|
| 4277 | if (dirp == 0) {
|
---|
| 4278 | DELETE(dp);
|
---|
| 4279 | DELETE(gp);
|
---|
| 4280 | return;
|
---|
| 4281 | }
|
---|
| 4282 | dname[NAME_MAX] = '\0';
|
---|
| 4283 | while ((de = readdir(dirp)) != NULL) {
|
---|
| 4284 | /* XXX Hmmm... What this could be? (abial) */
|
---|
| 4285 | /*
|
---|
| 4286 | if (ent[j].d_ino == 0)
|
---|
[1770] | 4287 | continue;
|
---|
[821] | 4288 | */
|
---|
| 4289 | strncpy(dname, de->d_name, NAME_MAX);
|
---|
| 4290 | if (dname[0] == '.')
|
---|
| 4291 | if (*gp != '.')
|
---|
| 4292 | continue;
|
---|
| 4293 | for (k = 0; k < NAME_MAX; k++)
|
---|
| 4294 | if (any(dname[k], spcl))
|
---|
| 4295 | dname[k] |= QUOTE;
|
---|
| 4296 | if (gmatch(dname, gp)) {
|
---|
| 4297 | name = generate(we, pp, dname, np);
|
---|
| 4298 | if (*np && !anys(np, spcl)) {
|
---|
| 4299 | if (stat(name, &dbuf)) {
|
---|
| 4300 | DELETE(name);
|
---|
| 4301 | continue;
|
---|
| 4302 | }
|
---|
| 4303 | }
|
---|
| 4304 | nl = addword(name, nl);
|
---|
| 4305 | }
|
---|
| 4306 | }
|
---|
| 4307 | closedir(dirp);
|
---|
| 4308 | DELETE(dp);
|
---|
| 4309 | DELETE(gp);
|
---|
| 4310 | }
|
---|
| 4311 |
|
---|
| 4312 | /*
|
---|
| 4313 | * generate a pathname as below.
|
---|
| 4314 | * start..end1 / middle end
|
---|
| 4315 | * the slashes come for free
|
---|
| 4316 | */
|
---|
[1770] | 4317 | static char *generate(char *start1, char *end1, char *middle, char *end)
|
---|
[821] | 4318 | {
|
---|
| 4319 | char *p;
|
---|
[1770] | 4320 | char *op, *xp;
|
---|
[821] | 4321 |
|
---|
[1770] | 4322 | p = op = space((int)(end1 - start1) + strlen(middle) + strlen(end) + 2);
|
---|
[821] | 4323 | for (xp = start1; xp != end1;)
|
---|
| 4324 | *op++ = *xp++;
|
---|
| 4325 | for (xp = middle; (*op++ = *xp++) != '\0';);
|
---|
| 4326 | op--;
|
---|
| 4327 | for (xp = end; (*op++ = *xp++) != '\0';);
|
---|
[1770] | 4328 | return p;
|
---|
[821] | 4329 | }
|
---|
| 4330 |
|
---|
[1770] | 4331 | static int anyspcl(struct wdblock *wb)
|
---|
[821] | 4332 | {
|
---|
[1770] | 4333 | int i;
|
---|
| 4334 | char **wd;
|
---|
[821] | 4335 |
|
---|
| 4336 | wd = wb->w_words;
|
---|
| 4337 | for (i = 0; i < wb->w_nword; i++)
|
---|
| 4338 | if (anys(spcl, *wd++))
|
---|
[1770] | 4339 | return 1;
|
---|
| 4340 | return 0;
|
---|
[821] | 4341 | }
|
---|
| 4342 |
|
---|
| 4343 | static int xstrcmp(char *p1, char *p2)
|
---|
| 4344 | {
|
---|
[1770] | 4345 | return strcmp(*(char **) p1, *(char **) p2);
|
---|
[821] | 4346 | }
|
---|
| 4347 |
|
---|
[1770] | 4348 |
|
---|
[821] | 4349 | /* -------- word.c -------- */
|
---|
| 4350 |
|
---|
[1770] | 4351 | static struct wdblock *newword(int nw)
|
---|
[821] | 4352 | {
|
---|
[1770] | 4353 | struct wdblock *wb;
|
---|
[821] | 4354 |
|
---|
| 4355 | wb = (struct wdblock *) space(sizeof(*wb) + nw * sizeof(char *));
|
---|
| 4356 | wb->w_bsize = nw;
|
---|
| 4357 | wb->w_nword = 0;
|
---|
[1770] | 4358 | return wb;
|
---|
[821] | 4359 | }
|
---|
| 4360 |
|
---|
[1770] | 4361 | static struct wdblock *addword(char *wd, struct wdblock *wb)
|
---|
[821] | 4362 | {
|
---|
[1770] | 4363 | struct wdblock *wb2;
|
---|
| 4364 | int nw;
|
---|
[821] | 4365 |
|
---|
| 4366 | if (wb == NULL)
|
---|
| 4367 | wb = newword(NSTART);
|
---|
[1770] | 4368 | nw = wb->w_nword;
|
---|
| 4369 | if (nw >= wb->w_bsize) {
|
---|
[821] | 4370 | wb2 = newword(nw * 2);
|
---|
| 4371 | memcpy((char *) wb2->w_words, (char *) wb->w_words,
|
---|
| 4372 | nw * sizeof(char *));
|
---|
| 4373 | wb2->w_nword = nw;
|
---|
| 4374 | DELETE(wb);
|
---|
| 4375 | wb = wb2;
|
---|
| 4376 | }
|
---|
| 4377 | wb->w_words[wb->w_nword++] = wd;
|
---|
[1770] | 4378 | return wb;
|
---|
[821] | 4379 | }
|
---|
| 4380 |
|
---|
[1770] | 4381 | static char **getwords(struct wdblock *wb)
|
---|
[821] | 4382 | {
|
---|
[1770] | 4383 | char **wd;
|
---|
| 4384 | int nb;
|
---|
[821] | 4385 |
|
---|
| 4386 | if (wb == NULL)
|
---|
[1770] | 4387 | return NULL;
|
---|
[821] | 4388 | if (wb->w_nword == 0) {
|
---|
| 4389 | DELETE(wb);
|
---|
[1770] | 4390 | return NULL;
|
---|
[821] | 4391 | }
|
---|
| 4392 | wd = (char **) space(nb = sizeof(*wd) * wb->w_nword);
|
---|
| 4393 | memcpy((char *) wd, (char *) wb->w_words, nb);
|
---|
| 4394 | DELETE(wb); /* perhaps should done by caller */
|
---|
[1770] | 4395 | return wd;
|
---|
[821] | 4396 | }
|
---|
| 4397 |
|
---|
| 4398 | static int (*func) (char *, char *);
|
---|
| 4399 | static int globv;
|
---|
| 4400 |
|
---|
[1770] | 4401 | static void glob3(char *i, char *j, char *k)
|
---|
[821] | 4402 | {
|
---|
[1770] | 4403 | char *index1, *index2, *index3;
|
---|
| 4404 | int c;
|
---|
| 4405 | int m;
|
---|
| 4406 |
|
---|
| 4407 | m = globv;
|
---|
| 4408 | index1 = i;
|
---|
| 4409 | index2 = j;
|
---|
| 4410 | index3 = k;
|
---|
| 4411 | do {
|
---|
| 4412 | c = *index1;
|
---|
| 4413 | *index1++ = *index3;
|
---|
| 4414 | *index3++ = *index2;
|
---|
| 4415 | *index2++ = c;
|
---|
| 4416 | } while (--m);
|
---|
[821] | 4417 | }
|
---|
| 4418 |
|
---|
[1770] | 4419 | static void glob2(char *i, char *j)
|
---|
| 4420 | {
|
---|
| 4421 | char *index1, *index2, c;
|
---|
| 4422 | int m;
|
---|
| 4423 |
|
---|
| 4424 | m = globv;
|
---|
| 4425 | index1 = i;
|
---|
| 4426 | index2 = j;
|
---|
| 4427 | do {
|
---|
| 4428 | c = *index1;
|
---|
| 4429 | *index1++ = *index2;
|
---|
| 4430 | *index2++ = c;
|
---|
| 4431 | } while (--m);
|
---|
| 4432 | }
|
---|
| 4433 |
|
---|
[821] | 4434 | static void glob1(char *base, char *lim)
|
---|
| 4435 | {
|
---|
[1770] | 4436 | char *i, *j;
|
---|
[821] | 4437 | int v2;
|
---|
| 4438 | char *lptr, *hptr;
|
---|
| 4439 | int c;
|
---|
| 4440 | unsigned n;
|
---|
| 4441 |
|
---|
| 4442 | v2 = globv;
|
---|
| 4443 |
|
---|
[1770] | 4444 | top:
|
---|
| 4445 | n = (int) (lim - base);
|
---|
| 4446 | if (n <= v2)
|
---|
[821] | 4447 | return;
|
---|
| 4448 | n = v2 * (n / (2 * v2));
|
---|
| 4449 | hptr = lptr = base + n;
|
---|
| 4450 | i = base;
|
---|
| 4451 | j = lim - v2;
|
---|
| 4452 | for (;;) {
|
---|
| 4453 | if (i < lptr) {
|
---|
[1770] | 4454 | c = (*func) (i, lptr);
|
---|
| 4455 | if (c == 0) {
|
---|
| 4456 | lptr -= v2;
|
---|
| 4457 | glob2(i, lptr);
|
---|
[821] | 4458 | continue;
|
---|
| 4459 | }
|
---|
| 4460 | if (c < 0) {
|
---|
| 4461 | i += v2;
|
---|
| 4462 | continue;
|
---|
| 4463 | }
|
---|
| 4464 | }
|
---|
| 4465 |
|
---|
[1770] | 4466 | begin:
|
---|
[821] | 4467 | if (j > hptr) {
|
---|
[1770] | 4468 | c = (*func) (hptr, j);
|
---|
| 4469 | if (c == 0) {
|
---|
| 4470 | hptr += v2;
|
---|
| 4471 | glob2(hptr, j);
|
---|
[821] | 4472 | goto begin;
|
---|
| 4473 | }
|
---|
| 4474 | if (c > 0) {
|
---|
| 4475 | if (i == lptr) {
|
---|
[1770] | 4476 | hptr += v2;
|
---|
| 4477 | glob3(i, hptr, j);
|
---|
| 4478 | i = (lptr += v2);
|
---|
[821] | 4479 | goto begin;
|
---|
| 4480 | }
|
---|
| 4481 | glob2(i, j);
|
---|
| 4482 | j -= v2;
|
---|
| 4483 | i += v2;
|
---|
| 4484 | continue;
|
---|
| 4485 | }
|
---|
| 4486 | j -= v2;
|
---|
| 4487 | goto begin;
|
---|
| 4488 | }
|
---|
| 4489 |
|
---|
| 4490 |
|
---|
| 4491 | if (i == lptr) {
|
---|
| 4492 | if (lptr - base >= lim - hptr) {
|
---|
| 4493 | glob1(hptr + v2, lim);
|
---|
| 4494 | lim = lptr;
|
---|
| 4495 | } else {
|
---|
| 4496 | glob1(base, lptr);
|
---|
| 4497 | base = hptr + v2;
|
---|
| 4498 | }
|
---|
| 4499 | goto top;
|
---|
| 4500 | }
|
---|
| 4501 |
|
---|
[1770] | 4502 | lptr -= v2;
|
---|
| 4503 | glob3(j, lptr, i);
|
---|
| 4504 | j = (hptr -= v2);
|
---|
[821] | 4505 | }
|
---|
| 4506 | }
|
---|
| 4507 |
|
---|
[1770] | 4508 | static void glob0(char *a0, unsigned a1, int a2, int (*a3) (char *, char *))
|
---|
[821] | 4509 | {
|
---|
[1770] | 4510 | func = a3;
|
---|
| 4511 | globv = a2;
|
---|
| 4512 | glob1(a0, a0 + a1 * a2);
|
---|
[821] | 4513 | }
|
---|
| 4514 |
|
---|
| 4515 |
|
---|
| 4516 | /* -------- io.c -------- */
|
---|
| 4517 |
|
---|
| 4518 | /*
|
---|
| 4519 | * shell IO
|
---|
| 4520 | */
|
---|
| 4521 |
|
---|
| 4522 | static int my_getc(int ec)
|
---|
| 4523 | {
|
---|
[1770] | 4524 | int c;
|
---|
[821] | 4525 |
|
---|
| 4526 | if (e.linep > elinep) {
|
---|
| 4527 | while ((c = readc()) != '\n' && c);
|
---|
| 4528 | err("input line too long");
|
---|
| 4529 | gflg++;
|
---|
[1770] | 4530 | return c;
|
---|
[821] | 4531 | }
|
---|
| 4532 | c = readc();
|
---|
| 4533 | if ((ec != '\'') && (ec != '`') && (e.iop->task != XGRAVE)) {
|
---|
| 4534 | if (c == '\\') {
|
---|
| 4535 | c = readc();
|
---|
| 4536 | if (c == '\n' && ec != '\"')
|
---|
[1770] | 4537 | return my_getc(ec);
|
---|
[821] | 4538 | c |= QUOTE;
|
---|
| 4539 | }
|
---|
| 4540 | }
|
---|
[1770] | 4541 | return c;
|
---|
[821] | 4542 | }
|
---|
| 4543 |
|
---|
| 4544 | static void unget(int c)
|
---|
| 4545 | {
|
---|
| 4546 | if (e.iop >= e.iobase)
|
---|
| 4547 | e.iop->peekc = c;
|
---|
| 4548 | }
|
---|
| 4549 |
|
---|
| 4550 | static int eofc(void)
|
---|
| 4551 | {
|
---|
| 4552 | return e.iop < e.iobase || (e.iop->peekc == 0 && e.iop->prev == 0);
|
---|
| 4553 | }
|
---|
| 4554 |
|
---|
| 4555 | static int readc(void)
|
---|
| 4556 | {
|
---|
[1770] | 4557 | int c;
|
---|
[821] | 4558 |
|
---|
| 4559 | RCPRINTF(("READC: e.iop %p, e.iobase %p\n", e.iop, e.iobase));
|
---|
| 4560 |
|
---|
| 4561 | for (; e.iop >= e.iobase; e.iop--) {
|
---|
| 4562 | RCPRINTF(("READC: e.iop %p, peekc 0x%x\n", e.iop, e.iop->peekc));
|
---|
[1770] | 4563 | c = e.iop->peekc;
|
---|
| 4564 | if (c != '\0') {
|
---|
[821] | 4565 | e.iop->peekc = 0;
|
---|
[1770] | 4566 | return c;
|
---|
| 4567 | }
|
---|
| 4568 | if (e.iop->prev != 0) {
|
---|
| 4569 | c = (*e.iop->iofn)(e.iop->argp, e.iop);
|
---|
| 4570 | if (c != '\0') {
|
---|
| 4571 | if (c == -1) {
|
---|
| 4572 | e.iop++;
|
---|
| 4573 | continue;
|
---|
[821] | 4574 | }
|
---|
[1770] | 4575 | if (e.iop == iostack)
|
---|
| 4576 | ioecho(c);
|
---|
| 4577 | e.iop->prev = c;
|
---|
| 4578 | return e.iop->prev;
|
---|
[821] | 4579 | }
|
---|
[1770] | 4580 | if (e.iop->task == XIO && e.iop->prev != '\n') {
|
---|
| 4581 | e.iop->prev = 0;
|
---|
| 4582 | if (e.iop == iostack)
|
---|
| 4583 | ioecho('\n');
|
---|
| 4584 | return '\n';
|
---|
| 4585 | }
|
---|
| 4586 | }
|
---|
| 4587 | if (e.iop->task == XIO) {
|
---|
| 4588 | if (multiline) {
|
---|
| 4589 | e.iop->prev = 0;
|
---|
| 4590 | return e.iop->prev;
|
---|
| 4591 | }
|
---|
| 4592 | if (interactive && e.iop == iostack + 1) {
|
---|
| 4593 | #if ENABLE_FEATURE_EDITING
|
---|
| 4594 | current_prompt = prompt->value;
|
---|
[821] | 4595 | #else
|
---|
[1770] | 4596 | prs(prompt->value);
|
---|
[821] | 4597 | #endif
|
---|
| 4598 | }
|
---|
| 4599 | }
|
---|
| 4600 | } /* FOR */
|
---|
| 4601 |
|
---|
| 4602 | if (e.iop >= iostack) {
|
---|
| 4603 | RCPRINTF(("READC: return 0, e.iop %p\n", e.iop));
|
---|
[1770] | 4604 | return 0;
|
---|
[821] | 4605 | }
|
---|
| 4606 |
|
---|
| 4607 | DBGPRINTF(("READC: leave()...\n"));
|
---|
| 4608 | leave();
|
---|
| 4609 |
|
---|
| 4610 | /* NOTREACHED */
|
---|
[1770] | 4611 | return 0;
|
---|
[821] | 4612 | }
|
---|
| 4613 |
|
---|
| 4614 | static void ioecho(char c)
|
---|
| 4615 | {
|
---|
[1770] | 4616 | if (FLAG['v'])
|
---|
[821] | 4617 | write(2, &c, sizeof c);
|
---|
| 4618 | }
|
---|
| 4619 |
|
---|
| 4620 |
|
---|
| 4621 | static void pushio(struct ioarg *argp, int (*fn) (struct ioarg *))
|
---|
| 4622 | {
|
---|
| 4623 | DBGPRINTF(("PUSHIO: argp %p, argp->afid 0x%x, e.iop %p\n", argp,
|
---|
| 4624 | argp->afid, e.iop));
|
---|
| 4625 |
|
---|
| 4626 | /* Set env ptr for io source to next array spot and check for array overflow */
|
---|
| 4627 | if (++e.iop >= &iostack[NPUSH]) {
|
---|
| 4628 | e.iop--;
|
---|
| 4629 | err("Shell input nested too deeply");
|
---|
| 4630 | gflg++;
|
---|
| 4631 | return;
|
---|
| 4632 | }
|
---|
| 4633 |
|
---|
| 4634 | /* We did not overflow the NPUSH array spots so setup data structs */
|
---|
| 4635 |
|
---|
| 4636 | e.iop->iofn = (int (*)(struct ioarg *, struct io *)) fn; /* Store data source func ptr */
|
---|
| 4637 |
|
---|
| 4638 | if (argp->afid != AFID_NOBUF)
|
---|
| 4639 | e.iop->argp = argp;
|
---|
| 4640 | else {
|
---|
| 4641 |
|
---|
| 4642 | e.iop->argp = ioargstack + (e.iop - iostack); /* MAL - index into stack */
|
---|
| 4643 | *e.iop->argp = *argp; /* copy data from temp area into stack spot */
|
---|
| 4644 |
|
---|
| 4645 | /* MAL - mainbuf is for 1st data source (command line?) and all nested use a single shared buffer? */
|
---|
| 4646 |
|
---|
| 4647 | if (e.iop == &iostack[0])
|
---|
| 4648 | e.iop->argp->afbuf = &mainbuf;
|
---|
| 4649 | else
|
---|
| 4650 | e.iop->argp->afbuf = &sharedbuf;
|
---|
| 4651 |
|
---|
| 4652 | /* MAL - if not a termimal AND (commandline OR readable file) then give it a buffer id? */
|
---|
| 4653 | /* This line appears to be active when running scripts from command line */
|
---|
| 4654 | if ((isatty(e.iop->argp->afile) == 0)
|
---|
| 4655 | && (e.iop == &iostack[0]
|
---|
[1770] | 4656 | || lseek(e.iop->argp->afile, 0L, SEEK_CUR) != -1)) {
|
---|
[821] | 4657 | if (++bufid == AFID_NOBUF) /* counter rollover check, AFID_NOBUF = 11111111 */
|
---|
| 4658 | bufid = AFID_ID; /* AFID_ID = 0 */
|
---|
| 4659 |
|
---|
| 4660 | e.iop->argp->afid = bufid; /* assign buffer id */
|
---|
| 4661 | }
|
---|
| 4662 |
|
---|
| 4663 | DBGPRINTF(("PUSHIO: iostack %p, e.iop %p, afbuf %p\n",
|
---|
| 4664 | iostack, e.iop, e.iop->argp->afbuf));
|
---|
| 4665 | DBGPRINTF(("PUSHIO: mbuf %p, sbuf %p, bid %d, e.iop %p\n",
|
---|
| 4666 | &mainbuf, &sharedbuf, bufid, e.iop));
|
---|
| 4667 |
|
---|
| 4668 | }
|
---|
| 4669 |
|
---|
| 4670 | e.iop->prev = ~'\n';
|
---|
| 4671 | e.iop->peekc = 0;
|
---|
| 4672 | e.iop->xchar = 0;
|
---|
| 4673 | e.iop->nlcount = 0;
|
---|
| 4674 |
|
---|
| 4675 | if (fn == filechar || fn == linechar)
|
---|
| 4676 | e.iop->task = XIO;
|
---|
| 4677 | else if (fn == (int (*)(struct ioarg *)) gravechar
|
---|
[1770] | 4678 | || fn == (int (*)(struct ioarg *)) qgravechar)
|
---|
[821] | 4679 | e.iop->task = XGRAVE;
|
---|
| 4680 | else
|
---|
| 4681 | e.iop->task = XOTHER;
|
---|
| 4682 | }
|
---|
| 4683 |
|
---|
| 4684 | static struct io *setbase(struct io *ip)
|
---|
| 4685 | {
|
---|
[1770] | 4686 | struct io *xp;
|
---|
[821] | 4687 |
|
---|
| 4688 | xp = e.iobase;
|
---|
| 4689 | e.iobase = ip;
|
---|
[1770] | 4690 | return xp;
|
---|
[821] | 4691 | }
|
---|
| 4692 |
|
---|
| 4693 | /*
|
---|
| 4694 | * Input generating functions
|
---|
| 4695 | */
|
---|
| 4696 |
|
---|
| 4697 | /*
|
---|
| 4698 | * Produce the characters of a string, then a newline, then EOF.
|
---|
| 4699 | */
|
---|
[1770] | 4700 | static int nlchar(struct ioarg *ap)
|
---|
[821] | 4701 | {
|
---|
[1770] | 4702 | int c;
|
---|
[821] | 4703 |
|
---|
| 4704 | if (ap->aword == NULL)
|
---|
[1770] | 4705 | return 0;
|
---|
| 4706 | c = *ap->aword++;
|
---|
| 4707 | if (c == 0) {
|
---|
[821] | 4708 | ap->aword = NULL;
|
---|
[1770] | 4709 | return '\n';
|
---|
[821] | 4710 | }
|
---|
[1770] | 4711 | return c;
|
---|
[821] | 4712 | }
|
---|
| 4713 |
|
---|
| 4714 | /*
|
---|
| 4715 | * Given a list of words, produce the characters
|
---|
| 4716 | * in them, with a space after each word.
|
---|
| 4717 | */
|
---|
[1770] | 4718 | static int wdchar(struct ioarg *ap)
|
---|
[821] | 4719 | {
|
---|
[1770] | 4720 | char c;
|
---|
| 4721 | char **wl;
|
---|
[821] | 4722 |
|
---|
[1770] | 4723 | wl = ap->awordlist;
|
---|
| 4724 | if (wl == NULL)
|
---|
| 4725 | return 0;
|
---|
[821] | 4726 | if (*wl != NULL) {
|
---|
[1770] | 4727 | c = *(*wl)++;
|
---|
| 4728 | if (c != 0)
|
---|
| 4729 | return c & 0177;
|
---|
[821] | 4730 | ap->awordlist++;
|
---|
[1770] | 4731 | return ' ';
|
---|
[821] | 4732 | }
|
---|
| 4733 | ap->awordlist = NULL;
|
---|
[1770] | 4734 | return '\n';
|
---|
[821] | 4735 | }
|
---|
| 4736 |
|
---|
| 4737 | /*
|
---|
| 4738 | * Return the characters of a list of words,
|
---|
| 4739 | * producing a space between them.
|
---|
| 4740 | */
|
---|
[1770] | 4741 | static int dolchar(struct ioarg *ap)
|
---|
[821] | 4742 | {
|
---|
[1770] | 4743 | char *wp;
|
---|
[821] | 4744 |
|
---|
[1770] | 4745 | wp = *ap->awordlist++;
|
---|
| 4746 | if (wp != NULL) {
|
---|
[821] | 4747 | PUSHIO(aword, wp, *ap->awordlist == NULL ? strchar : xxchar);
|
---|
[1770] | 4748 | return -1;
|
---|
[821] | 4749 | }
|
---|
[1770] | 4750 | return 0;
|
---|
[821] | 4751 | }
|
---|
| 4752 |
|
---|
[1770] | 4753 | static int xxchar(struct ioarg *ap)
|
---|
[821] | 4754 | {
|
---|
[1770] | 4755 | int c;
|
---|
[821] | 4756 |
|
---|
| 4757 | if (ap->aword == NULL)
|
---|
[1770] | 4758 | return 0;
|
---|
| 4759 | c = *ap->aword++;
|
---|
| 4760 | if (c == '\0') {
|
---|
[821] | 4761 | ap->aword = NULL;
|
---|
[1770] | 4762 | return ' ';
|
---|
[821] | 4763 | }
|
---|
[1770] | 4764 | return c;
|
---|
[821] | 4765 | }
|
---|
| 4766 |
|
---|
| 4767 | /*
|
---|
| 4768 | * Produce the characters from a single word (string).
|
---|
| 4769 | */
|
---|
[1770] | 4770 | static int strchar(struct ioarg *ap)
|
---|
[821] | 4771 | {
|
---|
[1770] | 4772 | if (ap->aword == NULL)
|
---|
| 4773 | return 0;
|
---|
| 4774 | return *ap->aword++;
|
---|
[821] | 4775 | }
|
---|
| 4776 |
|
---|
| 4777 | /*
|
---|
| 4778 | * Produce quoted characters from a single word (string).
|
---|
| 4779 | */
|
---|
[1770] | 4780 | static int qstrchar(struct ioarg *ap)
|
---|
[821] | 4781 | {
|
---|
[1770] | 4782 | int c;
|
---|
[821] | 4783 |
|
---|
[1770] | 4784 | if (ap->aword == NULL)
|
---|
| 4785 | return 0;
|
---|
| 4786 | c = *ap->aword++;
|
---|
| 4787 | if (c)
|
---|
| 4788 | c |= QUOTE;
|
---|
| 4789 | return c;
|
---|
[821] | 4790 | }
|
---|
| 4791 |
|
---|
| 4792 | /*
|
---|
| 4793 | * Return the characters from a file.
|
---|
| 4794 | */
|
---|
[1770] | 4795 | static int filechar(struct ioarg *ap)
|
---|
[821] | 4796 | {
|
---|
[1770] | 4797 | int i;
|
---|
[821] | 4798 | char c;
|
---|
| 4799 | struct iobuf *bp = ap->afbuf;
|
---|
| 4800 |
|
---|
| 4801 | if (ap->afid != AFID_NOBUF) {
|
---|
[1770] | 4802 | i = (ap->afid != bp->id);
|
---|
| 4803 | if (i || bp->bufp == bp->ebufp) {
|
---|
[821] | 4804 | if (i)
|
---|
[1770] | 4805 | lseek(ap->afile, ap->afpos, SEEK_SET);
|
---|
[821] | 4806 |
|
---|
| 4807 | i = safe_read(ap->afile, bp->buf, sizeof(bp->buf));
|
---|
| 4808 | if (i <= 0) {
|
---|
| 4809 | closef(ap->afile);
|
---|
| 4810 | return 0;
|
---|
| 4811 | }
|
---|
| 4812 |
|
---|
| 4813 | bp->id = ap->afid;
|
---|
[1770] | 4814 | bp->bufp = bp->buf;
|
---|
| 4815 | bp->ebufp = bp->bufp + i;
|
---|
[821] | 4816 | }
|
---|
| 4817 |
|
---|
| 4818 | ap->afpos++;
|
---|
| 4819 | return *bp->bufp++ & 0177;
|
---|
| 4820 | }
|
---|
[1770] | 4821 | #if ENABLE_FEATURE_EDITING
|
---|
[821] | 4822 | if (interactive && isatty(ap->afile)) {
|
---|
[1770] | 4823 | /* moved to G: static char filechar_cmdbuf[BUFSIZ]; */
|
---|
[821] | 4824 | static int position = 0, size = 0;
|
---|
| 4825 |
|
---|
| 4826 | while (size == 0 || position >= size) {
|
---|
[1770] | 4827 | read_line_input(current_prompt, filechar_cmdbuf, BUFSIZ, line_input_state);
|
---|
| 4828 | size = strlen(filechar_cmdbuf);
|
---|
[821] | 4829 | position = 0;
|
---|
| 4830 | }
|
---|
[1770] | 4831 | c = filechar_cmdbuf[position];
|
---|
[821] | 4832 | position++;
|
---|
[1770] | 4833 | return c;
|
---|
| 4834 | }
|
---|
[821] | 4835 | #endif
|
---|
[1770] | 4836 | i = safe_read(ap->afile, &c, sizeof(c));
|
---|
| 4837 | return i == sizeof(c) ? (c & 0x7f) : (closef(ap->afile), 0);
|
---|
[821] | 4838 | }
|
---|
| 4839 |
|
---|
| 4840 | /*
|
---|
| 4841 | * Return the characters from a here temp file.
|
---|
| 4842 | */
|
---|
[1770] | 4843 | static int herechar(struct ioarg *ap)
|
---|
[821] | 4844 | {
|
---|
| 4845 | char c;
|
---|
| 4846 |
|
---|
| 4847 | if (read(ap->afile, &c, sizeof(c)) != sizeof(c)) {
|
---|
| 4848 | close(ap->afile);
|
---|
[1770] | 4849 | c = '\0';
|
---|
[821] | 4850 | }
|
---|
[1770] | 4851 | return c;
|
---|
[821] | 4852 | }
|
---|
| 4853 |
|
---|
| 4854 | /*
|
---|
| 4855 | * Return the characters produced by a process (`...`).
|
---|
| 4856 | * Quote them if required, and remove any trailing newline characters.
|
---|
| 4857 | */
|
---|
| 4858 | static int gravechar(struct ioarg *ap, struct io *iop)
|
---|
| 4859 | {
|
---|
[1770] | 4860 | int c;
|
---|
[821] | 4861 |
|
---|
[1770] | 4862 | c = qgravechar(ap, iop) & ~QUOTE;
|
---|
| 4863 | if (c == '\n')
|
---|
[821] | 4864 | c = ' ';
|
---|
[1770] | 4865 | return c;
|
---|
[821] | 4866 | }
|
---|
| 4867 |
|
---|
[1770] | 4868 | static int qgravechar(struct ioarg *ap, struct io *iop)
|
---|
[821] | 4869 | {
|
---|
[1770] | 4870 | int c;
|
---|
[821] | 4871 |
|
---|
| 4872 | DBGPRINTF3(("QGRAVECHAR: enter, ap=%p, iop=%p\n", ap, iop));
|
---|
| 4873 |
|
---|
| 4874 | if (iop->xchar) {
|
---|
| 4875 | if (iop->nlcount) {
|
---|
| 4876 | iop->nlcount--;
|
---|
[1770] | 4877 | return '\n' | QUOTE;
|
---|
[821] | 4878 | }
|
---|
| 4879 | c = iop->xchar;
|
---|
| 4880 | iop->xchar = 0;
|
---|
| 4881 | } else if ((c = filechar(ap)) == '\n') {
|
---|
| 4882 | iop->nlcount = 1;
|
---|
| 4883 | while ((c = filechar(ap)) == '\n')
|
---|
| 4884 | iop->nlcount++;
|
---|
| 4885 | iop->xchar = c;
|
---|
| 4886 | if (c == 0)
|
---|
[1770] | 4887 | return c;
|
---|
[821] | 4888 | iop->nlcount--;
|
---|
| 4889 | c = '\n';
|
---|
| 4890 | }
|
---|
[1770] | 4891 | return c != 0 ? c | QUOTE : 0;
|
---|
[821] | 4892 | }
|
---|
| 4893 |
|
---|
| 4894 | /*
|
---|
| 4895 | * Return a single command (usually the first line) from a file.
|
---|
| 4896 | */
|
---|
[1770] | 4897 | static int linechar(struct ioarg *ap)
|
---|
[821] | 4898 | {
|
---|
[1770] | 4899 | int c;
|
---|
[821] | 4900 |
|
---|
[1770] | 4901 | c = filechar(ap);
|
---|
| 4902 | if (c == '\n') {
|
---|
[821] | 4903 | if (!multiline) {
|
---|
| 4904 | closef(ap->afile);
|
---|
| 4905 | ap->afile = -1; /* illegal value */
|
---|
| 4906 | }
|
---|
| 4907 | }
|
---|
[1770] | 4908 | return c;
|
---|
[821] | 4909 | }
|
---|
| 4910 |
|
---|
| 4911 | /*
|
---|
| 4912 | * remap fd into Shell's fd space
|
---|
| 4913 | */
|
---|
[1770] | 4914 | static int remap(int fd)
|
---|
[821] | 4915 | {
|
---|
[1770] | 4916 | int i;
|
---|
[821] | 4917 | int map[NOFILE];
|
---|
| 4918 | int newfd;
|
---|
| 4919 |
|
---|
| 4920 | DBGPRINTF(("REMAP: fd=%d, e.iofd=%d\n", fd, e.iofd));
|
---|
| 4921 |
|
---|
| 4922 | if (fd < e.iofd) {
|
---|
| 4923 | for (i = 0; i < NOFILE; i++)
|
---|
| 4924 | map[i] = 0;
|
---|
| 4925 |
|
---|
| 4926 | do {
|
---|
| 4927 | map[fd] = 1;
|
---|
| 4928 | newfd = dup(fd);
|
---|
| 4929 | fd = newfd;
|
---|
| 4930 | } while (fd >= 0 && fd < e.iofd);
|
---|
| 4931 |
|
---|
| 4932 | for (i = 0; i < NOFILE; i++)
|
---|
| 4933 | if (map[i])
|
---|
| 4934 | close(i);
|
---|
| 4935 |
|
---|
| 4936 | if (fd < 0)
|
---|
| 4937 | err("too many files open in shell");
|
---|
| 4938 | }
|
---|
| 4939 |
|
---|
[1770] | 4940 | return fd;
|
---|
[821] | 4941 | }
|
---|
| 4942 |
|
---|
[1770] | 4943 | static int openpipe(int *pv)
|
---|
[821] | 4944 | {
|
---|
[1770] | 4945 | int i;
|
---|
[821] | 4946 |
|
---|
[1770] | 4947 | i = pipe(pv);
|
---|
| 4948 | if (i < 0)
|
---|
[821] | 4949 | err("can't create pipe - try again");
|
---|
[1770] | 4950 | return i;
|
---|
[821] | 4951 | }
|
---|
| 4952 |
|
---|
[1770] | 4953 | static void closepipe(int *pv)
|
---|
[821] | 4954 | {
|
---|
| 4955 | if (pv != NULL) {
|
---|
| 4956 | close(*pv++);
|
---|
| 4957 | close(*pv);
|
---|
| 4958 | }
|
---|
| 4959 | }
|
---|
| 4960 |
|
---|
[1770] | 4961 |
|
---|
[821] | 4962 | /* -------- here.c -------- */
|
---|
| 4963 |
|
---|
| 4964 | /*
|
---|
| 4965 | * here documents
|
---|
| 4966 | */
|
---|
| 4967 |
|
---|
[1770] | 4968 | static void markhere(char *s, struct ioword *iop)
|
---|
[821] | 4969 | {
|
---|
[1770] | 4970 | struct here *h, *lh;
|
---|
[821] | 4971 |
|
---|
| 4972 | DBGPRINTF7(("MARKHERE: enter, s=%p\n", s));
|
---|
| 4973 |
|
---|
| 4974 | h = (struct here *) space(sizeof(struct here));
|
---|
[1770] | 4975 | if (h == NULL)
|
---|
[821] | 4976 | return;
|
---|
| 4977 |
|
---|
| 4978 | h->h_tag = evalstr(s, DOSUB);
|
---|
| 4979 | if (h->h_tag == 0)
|
---|
| 4980 | return;
|
---|
| 4981 |
|
---|
| 4982 | h->h_iop = iop;
|
---|
| 4983 | iop->io_name = 0;
|
---|
| 4984 | h->h_next = NULL;
|
---|
| 4985 | if (inhere == 0)
|
---|
| 4986 | inhere = h;
|
---|
[1770] | 4987 | else {
|
---|
| 4988 | for (lh = inhere; lh != NULL; lh = lh->h_next) {
|
---|
[821] | 4989 | if (lh->h_next == 0) {
|
---|
| 4990 | lh->h_next = h;
|
---|
| 4991 | break;
|
---|
| 4992 | }
|
---|
[1770] | 4993 | }
|
---|
| 4994 | }
|
---|
[821] | 4995 | iop->io_flag |= IOHERE | IOXHERE;
|
---|
[1770] | 4996 | for (s = h->h_tag; *s; s++) {
|
---|
[821] | 4997 | if (*s & QUOTE) {
|
---|
| 4998 | iop->io_flag &= ~IOXHERE;
|
---|
| 4999 | *s &= ~QUOTE;
|
---|
| 5000 | }
|
---|
[1770] | 5001 | }
|
---|
[821] | 5002 | h->h_dosub = iop->io_flag & IOXHERE;
|
---|
| 5003 | }
|
---|
| 5004 |
|
---|
| 5005 | static void gethere(void)
|
---|
| 5006 | {
|
---|
[1770] | 5007 | struct here *h, *hp;
|
---|
[821] | 5008 |
|
---|
| 5009 | DBGPRINTF7(("GETHERE: enter...\n"));
|
---|
| 5010 |
|
---|
| 5011 | /* Scan here files first leaving inhere list in place */
|
---|
| 5012 | for (hp = h = inhere; h != NULL; hp = h, h = h->h_next)
|
---|
| 5013 | readhere(&h->h_iop->io_name, h->h_tag, h->h_dosub ? 0 : '\'');
|
---|
| 5014 |
|
---|
| 5015 | /* Make inhere list active - keep list intact for scraphere */
|
---|
| 5016 | if (hp != NULL) {
|
---|
| 5017 | hp->h_next = acthere;
|
---|
| 5018 | acthere = inhere;
|
---|
| 5019 | inhere = NULL;
|
---|
| 5020 | }
|
---|
| 5021 | }
|
---|
| 5022 |
|
---|
[1770] | 5023 | static void readhere(char **name, char *s, int ec)
|
---|
[821] | 5024 | {
|
---|
| 5025 | int tf;
|
---|
| 5026 | char tname[30] = ".msh_XXXXXX";
|
---|
[1770] | 5027 | int c;
|
---|
[821] | 5028 | jmp_buf ev;
|
---|
| 5029 | char myline[LINELIM + 1];
|
---|
| 5030 | char *thenext;
|
---|
| 5031 |
|
---|
| 5032 | DBGPRINTF7(("READHERE: enter, name=%p, s=%p\n", name, s));
|
---|
| 5033 |
|
---|
| 5034 | tf = mkstemp(tname);
|
---|
| 5035 | if (tf < 0)
|
---|
| 5036 | return;
|
---|
| 5037 |
|
---|
| 5038 | *name = strsave(tname, areanum);
|
---|
[1770] | 5039 | errpt = ev;
|
---|
| 5040 | if (newenv(setjmp(errpt)) != 0)
|
---|
[821] | 5041 | unlink(tname);
|
---|
| 5042 | else {
|
---|
| 5043 | pushio(e.iop->argp, (int (*)(struct ioarg *)) e.iop->iofn);
|
---|
| 5044 | e.iobase = e.iop;
|
---|
| 5045 | for (;;) {
|
---|
| 5046 | if (interactive && e.iop <= iostack) {
|
---|
[1770] | 5047 | #if ENABLE_FEATURE_EDITING
|
---|
[821] | 5048 | current_prompt = cprompt->value;
|
---|
| 5049 | #else
|
---|
| 5050 | prs(cprompt->value);
|
---|
| 5051 | #endif
|
---|
| 5052 | }
|
---|
| 5053 | thenext = myline;
|
---|
| 5054 | while ((c = my_getc(ec)) != '\n' && c) {
|
---|
| 5055 | if (ec == '\'')
|
---|
| 5056 | c &= ~QUOTE;
|
---|
| 5057 | if (thenext >= &myline[LINELIM]) {
|
---|
| 5058 | c = 0;
|
---|
| 5059 | break;
|
---|
| 5060 | }
|
---|
| 5061 | *thenext++ = c;
|
---|
| 5062 | }
|
---|
| 5063 | *thenext = 0;
|
---|
| 5064 | if (strcmp(s, myline) == 0 || c == 0)
|
---|
| 5065 | break;
|
---|
| 5066 | *thenext++ = '\n';
|
---|
| 5067 | write(tf, myline, (int) (thenext - myline));
|
---|
| 5068 | }
|
---|
| 5069 | if (c == 0) {
|
---|
| 5070 | prs("here document `");
|
---|
| 5071 | prs(s);
|
---|
| 5072 | err("' unclosed");
|
---|
| 5073 | }
|
---|
| 5074 | quitenv();
|
---|
| 5075 | }
|
---|
| 5076 | close(tf);
|
---|
| 5077 | }
|
---|
| 5078 |
|
---|
| 5079 | /*
|
---|
| 5080 | * open here temp file.
|
---|
| 5081 | * if unquoted here, expand here temp file into second temp file.
|
---|
| 5082 | */
|
---|
| 5083 | static int herein(char *hname, int xdoll)
|
---|
| 5084 | {
|
---|
[1770] | 5085 | int hf;
|
---|
[821] | 5086 | int tf;
|
---|
| 5087 |
|
---|
| 5088 | #if __GNUC__
|
---|
| 5089 | /* Avoid longjmp clobbering */
|
---|
| 5090 | (void) &tf;
|
---|
| 5091 | #endif
|
---|
| 5092 | if (hname == NULL)
|
---|
[1770] | 5093 | return -1;
|
---|
[821] | 5094 |
|
---|
| 5095 | DBGPRINTF7(("HEREIN: hname is %s, xdoll=%d\n", hname, xdoll));
|
---|
| 5096 |
|
---|
[1770] | 5097 | hf = open(hname, O_RDONLY);
|
---|
[821] | 5098 | if (hf < 0)
|
---|
[1770] | 5099 | return -1;
|
---|
[821] | 5100 |
|
---|
| 5101 | if (xdoll) {
|
---|
| 5102 | char c;
|
---|
| 5103 | char tname[30] = ".msh_XXXXXX";
|
---|
| 5104 | jmp_buf ev;
|
---|
| 5105 |
|
---|
| 5106 | tf = mkstemp(tname);
|
---|
| 5107 | if (tf < 0)
|
---|
[1770] | 5108 | return -1;
|
---|
| 5109 | errpt = ev;
|
---|
| 5110 | if (newenv(setjmp(errpt)) == 0) {
|
---|
[821] | 5111 | PUSHIO(afile, hf, herechar);
|
---|
| 5112 | setbase(e.iop);
|
---|
| 5113 | while ((c = subgetc(0, 0)) != 0) {
|
---|
| 5114 | c &= ~QUOTE;
|
---|
| 5115 | write(tf, &c, sizeof c);
|
---|
| 5116 | }
|
---|
| 5117 | quitenv();
|
---|
| 5118 | } else
|
---|
| 5119 | unlink(tname);
|
---|
| 5120 | close(tf);
|
---|
[1770] | 5121 | tf = open(tname, O_RDONLY);
|
---|
[821] | 5122 | unlink(tname);
|
---|
[1770] | 5123 | return tf;
|
---|
| 5124 | }
|
---|
| 5125 | return hf;
|
---|
[821] | 5126 | }
|
---|
| 5127 |
|
---|
| 5128 | static void scraphere(void)
|
---|
| 5129 | {
|
---|
[1770] | 5130 | struct here *h;
|
---|
[821] | 5131 |
|
---|
| 5132 | DBGPRINTF7(("SCRAPHERE: enter...\n"));
|
---|
| 5133 |
|
---|
| 5134 | for (h = inhere; h != NULL; h = h->h_next) {
|
---|
| 5135 | if (h->h_iop && h->h_iop->io_name)
|
---|
| 5136 | unlink(h->h_iop->io_name);
|
---|
| 5137 | }
|
---|
| 5138 | inhere = NULL;
|
---|
| 5139 | }
|
---|
| 5140 |
|
---|
| 5141 | /* unlink here temp files before a freearea(area) */
|
---|
| 5142 | static void freehere(int area)
|
---|
| 5143 | {
|
---|
[1770] | 5144 | struct here *h, *hl;
|
---|
[821] | 5145 |
|
---|
| 5146 | DBGPRINTF6(("FREEHERE: enter, area=%d\n", area));
|
---|
| 5147 |
|
---|
| 5148 | hl = NULL;
|
---|
| 5149 | for (h = acthere; h != NULL; h = h->h_next)
|
---|
| 5150 | if (getarea((char *) h) >= area) {
|
---|
| 5151 | if (h->h_iop->io_name != NULL)
|
---|
| 5152 | unlink(h->h_iop->io_name);
|
---|
| 5153 | if (hl == NULL)
|
---|
| 5154 | acthere = h->h_next;
|
---|
| 5155 | else
|
---|
| 5156 | hl->h_next = h->h_next;
|
---|
| 5157 | } else
|
---|
| 5158 | hl = h;
|
---|
| 5159 | }
|
---|
| 5160 |
|
---|
| 5161 |
|
---|
[1770] | 5162 | /* -------- sh.c -------- */
|
---|
| 5163 | /*
|
---|
| 5164 | * shell
|
---|
| 5165 | */
|
---|
[821] | 5166 |
|
---|
[1770] | 5167 | int msh_main(int argc, char **argv);
|
---|
| 5168 | int msh_main(int argc, char **argv)
|
---|
| 5169 | {
|
---|
| 5170 | int f;
|
---|
| 5171 | char *s;
|
---|
| 5172 | int cflag;
|
---|
| 5173 | char *name, **ap;
|
---|
| 5174 | int (*iof) (struct ioarg *);
|
---|
| 5175 |
|
---|
| 5176 | PTR_TO_GLOBALS = xzalloc(sizeof(G));
|
---|
| 5177 | sharedbuf.id = AFID_NOBUF;
|
---|
| 5178 | mainbuf.id = AFID_NOBUF;
|
---|
| 5179 | e.linep = line;
|
---|
| 5180 | elinep = line + sizeof(line) - 5;
|
---|
| 5181 |
|
---|
| 5182 | #if ENABLE_FEATURE_EDITING
|
---|
| 5183 | line_input_state = new_line_input_t(FOR_SHELL);
|
---|
| 5184 | #endif
|
---|
| 5185 |
|
---|
| 5186 | DBGPRINTF(("MSH_MAIN: argc %d, environ %p\n", argc, environ));
|
---|
| 5187 |
|
---|
| 5188 | initarea();
|
---|
| 5189 | ap = environ;
|
---|
| 5190 | if (ap != NULL) {
|
---|
| 5191 | while (*ap)
|
---|
| 5192 | assign(*ap++, !COPYV);
|
---|
| 5193 | for (ap = environ; *ap;)
|
---|
| 5194 | export(lookup(*ap++));
|
---|
| 5195 | }
|
---|
| 5196 | closeall();
|
---|
| 5197 | areanum = 1;
|
---|
| 5198 |
|
---|
| 5199 | shell = lookup("SHELL");
|
---|
| 5200 | if (shell->value == null)
|
---|
| 5201 | setval(shell, (char *)DEFAULT_SHELL);
|
---|
| 5202 | export(shell);
|
---|
| 5203 |
|
---|
| 5204 | homedir = lookup("HOME");
|
---|
| 5205 | if (homedir->value == null)
|
---|
| 5206 | setval(homedir, "/");
|
---|
| 5207 | export(homedir);
|
---|
| 5208 |
|
---|
| 5209 | setval(lookup("$"), putn(getpid()));
|
---|
| 5210 |
|
---|
| 5211 | path = lookup("PATH");
|
---|
| 5212 | if (path->value == null) {
|
---|
| 5213 | /* Can be merged with same string elsewhere in bbox */
|
---|
| 5214 | if (geteuid() == 0)
|
---|
| 5215 | setval(path, bb_default_root_path);
|
---|
| 5216 | else
|
---|
| 5217 | setval(path, bb_default_path);
|
---|
| 5218 | }
|
---|
| 5219 | export(path);
|
---|
| 5220 |
|
---|
| 5221 | ifs = lookup("IFS");
|
---|
| 5222 | if (ifs->value == null)
|
---|
| 5223 | setval(ifs, " \t\n");
|
---|
| 5224 |
|
---|
| 5225 | #ifdef MSHDEBUG
|
---|
| 5226 | mshdbg_var = lookup("MSHDEBUG");
|
---|
| 5227 | if (mshdbg_var->value == null)
|
---|
| 5228 | setval(mshdbg_var, "0");
|
---|
| 5229 | #endif
|
---|
| 5230 |
|
---|
| 5231 | prompt = lookup("PS1");
|
---|
| 5232 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
| 5233 | if (prompt->value == null)
|
---|
| 5234 | #endif
|
---|
| 5235 | setval(prompt, DEFAULT_USER_PROMPT);
|
---|
| 5236 | if (geteuid() == 0) {
|
---|
| 5237 | setval(prompt, DEFAULT_ROOT_PROMPT);
|
---|
| 5238 | prompt->status &= ~EXPORT;
|
---|
| 5239 | }
|
---|
| 5240 | cprompt = lookup("PS2");
|
---|
| 5241 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
| 5242 | if (cprompt->value == null)
|
---|
| 5243 | #endif
|
---|
| 5244 | setval(cprompt, "> ");
|
---|
| 5245 |
|
---|
| 5246 | iof = filechar;
|
---|
| 5247 | cflag = 0;
|
---|
| 5248 | name = *argv++;
|
---|
| 5249 | if (--argc >= 1) {
|
---|
| 5250 | if (argv[0][0] == '-' && argv[0][1] != '\0') {
|
---|
| 5251 | for (s = argv[0] + 1; *s; s++)
|
---|
| 5252 | switch (*s) {
|
---|
| 5253 | case 'c':
|
---|
| 5254 | prompt->status &= ~EXPORT;
|
---|
| 5255 | cprompt->status &= ~EXPORT;
|
---|
| 5256 | setval(prompt, "");
|
---|
| 5257 | setval(cprompt, "");
|
---|
| 5258 | cflag = 1;
|
---|
| 5259 | if (--argc > 0)
|
---|
| 5260 | PUSHIO(aword, *++argv, iof = nlchar);
|
---|
| 5261 | break;
|
---|
| 5262 |
|
---|
| 5263 | case 'q':
|
---|
| 5264 | qflag = SIG_DFL;
|
---|
| 5265 | break;
|
---|
| 5266 |
|
---|
| 5267 | case 's':
|
---|
| 5268 | /* standard input */
|
---|
| 5269 | break;
|
---|
| 5270 |
|
---|
| 5271 | case 't':
|
---|
| 5272 | prompt->status &= ~EXPORT;
|
---|
| 5273 | setval(prompt, "");
|
---|
| 5274 | iof = linechar;
|
---|
| 5275 | break;
|
---|
| 5276 |
|
---|
| 5277 | case 'i':
|
---|
| 5278 | interactive++;
|
---|
| 5279 | default:
|
---|
| 5280 | if (*s >= 'a' && *s <= 'z')
|
---|
| 5281 | FLAG[(int) *s]++;
|
---|
| 5282 | }
|
---|
| 5283 | } else {
|
---|
| 5284 | argv--;
|
---|
| 5285 | argc++;
|
---|
| 5286 | }
|
---|
| 5287 |
|
---|
| 5288 | if (iof == filechar && --argc > 0) {
|
---|
| 5289 | setval(prompt, "");
|
---|
| 5290 | setval(cprompt, "");
|
---|
| 5291 | prompt->status &= ~EXPORT;
|
---|
| 5292 | cprompt->status &= ~EXPORT;
|
---|
| 5293 |
|
---|
| 5294 | /* Shell is non-interactive, activate printf-based debug */
|
---|
| 5295 | #ifdef MSHDEBUG
|
---|
| 5296 | mshdbg = (int) (((char) (mshdbg_var->value[0])) - '0');
|
---|
| 5297 | if (mshdbg < 0)
|
---|
| 5298 | mshdbg = 0;
|
---|
| 5299 | #endif
|
---|
| 5300 | DBGPRINTF(("MSH_MAIN: calling newfile()\n"));
|
---|
| 5301 |
|
---|
| 5302 | name = *++argv;
|
---|
| 5303 | if (newfile(name))
|
---|
| 5304 | exit(1); /* Exit on error */
|
---|
| 5305 | }
|
---|
| 5306 | }
|
---|
| 5307 |
|
---|
| 5308 | setdash();
|
---|
| 5309 |
|
---|
| 5310 | /* This won't be true if PUSHIO has been called, say from newfile() above */
|
---|
| 5311 | if (e.iop < iostack) {
|
---|
| 5312 | PUSHIO(afile, 0, iof);
|
---|
| 5313 | if (isatty(0) && isatty(1) && !cflag) {
|
---|
| 5314 | interactive++;
|
---|
| 5315 | #if !ENABLE_FEATURE_SH_EXTRA_QUIET
|
---|
| 5316 | #ifdef MSHDEBUG
|
---|
| 5317 | printf("\n\n%s built-in shell (msh with debug)\n", bb_banner);
|
---|
| 5318 | #else
|
---|
| 5319 | printf("\n\n%s built-in shell (msh)\n", bb_banner);
|
---|
| 5320 | #endif
|
---|
| 5321 | printf("Enter 'help' for a list of built-in commands.\n\n");
|
---|
| 5322 | #endif
|
---|
| 5323 | }
|
---|
| 5324 | }
|
---|
| 5325 |
|
---|
| 5326 | signal(SIGQUIT, qflag);
|
---|
| 5327 | if (name && name[0] == '-') {
|
---|
| 5328 | interactive++;
|
---|
| 5329 | f = open(".profile", O_RDONLY);
|
---|
| 5330 | if (f >= 0)
|
---|
| 5331 | next(remap(f));
|
---|
| 5332 | f = open("/etc/profile", O_RDONLY);
|
---|
| 5333 | if (f >= 0)
|
---|
| 5334 | next(remap(f));
|
---|
| 5335 | }
|
---|
| 5336 | if (interactive)
|
---|
| 5337 | signal(SIGTERM, sig);
|
---|
| 5338 |
|
---|
| 5339 | if (signal(SIGINT, SIG_IGN) != SIG_IGN)
|
---|
| 5340 | signal(SIGINT, onintr);
|
---|
| 5341 | dolv = argv;
|
---|
| 5342 | dolc = argc;
|
---|
| 5343 | dolv[0] = name;
|
---|
| 5344 | if (dolc > 1) {
|
---|
| 5345 | for (ap = ++argv; --argc > 0;) {
|
---|
| 5346 | *ap = *argv++;
|
---|
| 5347 | if (assign(*ap, !COPYV)) {
|
---|
| 5348 | dolc--; /* keyword */
|
---|
| 5349 | } else {
|
---|
| 5350 | ap++;
|
---|
| 5351 | }
|
---|
| 5352 | }
|
---|
| 5353 | }
|
---|
| 5354 | setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc));
|
---|
| 5355 |
|
---|
| 5356 | DBGPRINTF(("MSH_MAIN: begin FOR loop, interactive %d, e.iop %p, iostack %p\n", interactive, e.iop, iostack));
|
---|
| 5357 |
|
---|
| 5358 | for (;;) {
|
---|
| 5359 | if (interactive && e.iop <= iostack) {
|
---|
| 5360 | #if ENABLE_FEATURE_EDITING
|
---|
| 5361 | current_prompt = prompt->value;
|
---|
| 5362 | #else
|
---|
| 5363 | prs(prompt->value);
|
---|
| 5364 | #endif
|
---|
| 5365 | }
|
---|
| 5366 | onecommand();
|
---|
| 5367 | /* Ensure that getenv("PATH") stays current */
|
---|
| 5368 | setenv("PATH", path->value, 1);
|
---|
| 5369 | }
|
---|
| 5370 |
|
---|
| 5371 | DBGPRINTF(("MSH_MAIN: returning.\n"));
|
---|
| 5372 | }
|
---|
| 5373 |
|
---|
| 5374 |
|
---|
[821] | 5375 | /*
|
---|
| 5376 | * Copyright (c) 1987,1997, Prentice Hall
|
---|
| 5377 | * All rights reserved.
|
---|
| 5378 | *
|
---|
| 5379 | * Redistribution and use of the MINIX operating system in source and
|
---|
| 5380 | * binary forms, with or without modification, are permitted provided
|
---|
| 5381 | * that the following conditions are met:
|
---|
| 5382 | *
|
---|
| 5383 | * Redistributions of source code must retain the above copyright
|
---|
| 5384 | * notice, this list of conditions and the following disclaimer.
|
---|
| 5385 | *
|
---|
| 5386 | * Redistributions in binary form must reproduce the above
|
---|
| 5387 | * copyright notice, this list of conditions and the following
|
---|
| 5388 | * disclaimer in the documentation and/or other materials provided
|
---|
| 5389 | * with the distribution.
|
---|
| 5390 | *
|
---|
| 5391 | * Neither the name of Prentice Hall nor the names of the software
|
---|
| 5392 | * authors or contributors may be used to endorse or promote
|
---|
| 5393 | * products derived from this software without specific prior
|
---|
| 5394 | * written permission.
|
---|
| 5395 | *
|
---|
| 5396 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND
|
---|
| 5397 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
---|
| 5398 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
---|
| 5399 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
---|
| 5400 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE
|
---|
| 5401 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
---|
| 5402 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
---|
| 5403 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
---|
| 5404 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
---|
| 5405 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
---|
| 5406 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
---|
| 5407 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
| 5408 | *
|
---|
| 5409 | */
|
---|