| 1 | /* $Header: /p/tcsh/cvsroot/tcsh/sh.exec.c,v 3.75 2009/06/25 21:15:37 christos Exp $ */ |
| 2 | /* |
| 3 | * sh.exec.c: Search, find, and execute a command! |
| 4 | */ |
| 5 | /*- |
| 6 | * Copyright (c) 1980, 1991 The Regents of the University of California. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | #include "sh.h" |
| 34 | |
| 35 | RCSID("$tcsh: sh.exec.c,v 3.75 2009/06/25 21:15:37 christos Exp $") |
| 36 | |
| 37 | #include "tc.h" |
| 38 | #include "tw.h" |
| 39 | #ifdef WINNT_NATIVE |
| 40 | #include <nt.const.h> |
| 41 | #endif /*WINNT_NATIVE*/ |
| 42 | |
| 43 | /* |
| 44 | * C shell |
| 45 | */ |
| 46 | |
| 47 | #ifndef OLDHASH |
| 48 | # define FASTHASH /* Fast hashing is the default */ |
| 49 | #endif /* OLDHASH */ |
| 50 | |
| 51 | /* |
| 52 | * System level search and execute of a command. |
| 53 | * We look in each directory for the specified command name. |
| 54 | * If the name contains a '/' then we execute only the full path name. |
| 55 | * If there is no search path then we execute only full path names. |
| 56 | */ |
| 57 | |
| 58 | /* |
| 59 | * As we search for the command we note the first non-trivial error |
| 60 | * message for presentation to the user. This allows us often |
| 61 | * to show that a file has the wrong mode/no access when the file |
| 62 | * is not in the last component of the search path, so we must |
| 63 | * go on after first detecting the error. |
| 64 | */ |
| 65 | static char *exerr; /* Execution error message */ |
| 66 | static Char *expath; /* Path for exerr */ |
| 67 | |
| 68 | /* |
| 69 | * The two part hash function is designed to let texec() call the |
| 70 | * more expensive hashname() only once and the simple hash() several |
| 71 | * times (once for each path component checked). |
| 72 | * Byte size is assumed to be 8. |
| 73 | */ |
| 74 | #define BITS_PER_BYTE 8 |
| 75 | |
| 76 | #ifdef FASTHASH |
| 77 | /* |
| 78 | * xhash is an array of hash buckets which are used to hash execs. If |
| 79 | * it is allocated (havhash true), then to tell if ``name'' is |
| 80 | * (possibly) presend in the i'th component of the variable path, look |
| 81 | * at the [hashname(name)] bucket of size [hashwidth] bytes, in the [i |
| 82 | * mod size*8]'th bit. The cache size is defaults to a length of 1024 |
| 83 | * buckets, each 1 byte wide. This implementation guarantees that |
| 84 | * objects n bytes wide will be aligned on n byte boundaries. |
| 85 | */ |
| 86 | # define HSHMUL 241 |
| 87 | |
| 88 | static unsigned long *xhash = NULL; |
| 89 | static unsigned int hashlength = 0, uhashlength = 0; |
| 90 | static unsigned int hashwidth = 0, uhashwidth = 0; |
| 91 | static int hashdebug = 0; |
| 92 | |
| 93 | # define hash(a, b) (((a) * HSHMUL + (b)) % (hashlength)) |
| 94 | # define widthof(t) (sizeof(t) * BITS_PER_BYTE) |
| 95 | # define tbit(f, i, t) (((t *) xhash)[(f)] & \ |
| 96 | (1UL << (i & (widthof(t) - 1)))) |
| 97 | # define tbis(f, i, t) (((t *) xhash)[(f)] |= \ |
| 98 | (1UL << (i & (widthof(t) - 1)))) |
| 99 | # define cbit(f, i) tbit(f, i, unsigned char) |
| 100 | # define cbis(f, i) tbis(f, i, unsigned char) |
| 101 | # define sbit(f, i) tbit(f, i, unsigned short) |
| 102 | # define sbis(f, i) tbis(f, i, unsigned short) |
| 103 | # define ibit(f, i) tbit(f, i, unsigned int) |
| 104 | # define ibis(f, i) tbis(f, i, unsigned int) |
| 105 | # define lbit(f, i) tbit(f, i, unsigned long) |
| 106 | # define lbis(f, i) tbis(f, i, unsigned long) |
| 107 | |
| 108 | # define bit(f, i) (hashwidth==sizeof(unsigned char) ? cbit(f,i) : \ |
| 109 | ((hashwidth==sizeof(unsigned short) ? sbit(f,i) : \ |
| 110 | ((hashwidth==sizeof(unsigned int) ? ibit(f,i) : \ |
| 111 | lbit(f,i)))))) |
| 112 | # define bis(f, i) (hashwidth==sizeof(unsigned char) ? cbis(f,i) : \ |
| 113 | ((hashwidth==sizeof(unsigned short) ? sbis(f,i) : \ |
| 114 | ((hashwidth==sizeof(unsigned int) ? ibis(f,i) : \ |
| 115 | lbis(f,i)))))) |
| 116 | #else /* OLDHASH */ |
| 117 | /* |
| 118 | * Xhash is an array of HSHSIZ bits (HSHSIZ / 8 chars), which are used |
| 119 | * to hash execs. If it is allocated (havhash true), then to tell |
| 120 | * whether ``name'' is (possibly) present in the i'th component |
| 121 | * of the variable path, you look at the bit in xhash indexed by |
| 122 | * hash(hashname("name"), i). This is setup automatically |
| 123 | * after .login is executed, and recomputed whenever ``path'' is |
| 124 | * changed. |
| 125 | */ |
| 126 | # define HSHSIZ 8192 /* 1k bytes */ |
| 127 | # define HSHMASK (HSHSIZ - 1) |
| 128 | # define HSHMUL 243 |
| 129 | static char xhash[HSHSIZ / BITS_PER_BYTE]; |
| 130 | |
| 131 | # define hash(a, b) (((a) * HSHMUL + (b)) & HSHMASK) |
| 132 | # define bit(h, b) ((h)[(b) >> 3] & 1 << ((b) & 7)) /* bit test */ |
| 133 | # define bis(h, b) ((h)[(b) >> 3] |= 1 << ((b) & 7)) /* bit set */ |
| 134 | |
| 135 | #endif /* FASTHASH */ |
| 136 | |
| 137 | #ifdef VFORK |
| 138 | static int hits, misses; |
| 139 | #endif /* VFORK */ |
| 140 | |
| 141 | /* Dummy search path for just absolute search when no path */ |
| 142 | static Char *justabs[] = {STRNULL, 0}; |
| 143 | |
| 144 | static void pexerr (void); |
| 145 | static void texec (Char *, Char **); |
| 146 | int hashname (Char *); |
| 147 | static int iscommand (Char *); |
| 148 | |
| 149 | void |
| 150 | doexec(struct command *t, int do_glob) |
| 151 | { |
| 152 | Char *dp, **pv, **av, *sav; |
| 153 | struct varent *v; |
| 154 | int slash, gflag; |
| 155 | int hashval, i; |
| 156 | Char *blk[2]; |
| 157 | |
| 158 | /* |
| 159 | * Glob the command name. We will search $path even if this does something, |
| 160 | * as in sh but not in csh. One special case: if there is no PATH, then we |
| 161 | * execute only commands which start with '/'. |
| 162 | */ |
| 163 | blk[0] = t->t_dcom[0]; |
| 164 | blk[1] = 0; |
| 165 | gflag = 0; |
| 166 | if (do_glob) |
| 167 | gflag = tglob(blk); |
| 168 | if (gflag) { |
| 169 | pv = globall(blk, gflag); |
| 170 | if (pv == 0) { |
| 171 | setname(short2str(blk[0])); |
| 172 | stderror(ERR_NAME | ERR_NOMATCH); |
| 173 | } |
| 174 | } |
| 175 | else |
| 176 | pv = saveblk(blk); |
| 177 | cleanup_push(pv, blk_cleanup); |
| 178 | |
| 179 | trim(pv); |
| 180 | |
| 181 | exerr = 0; |
| 182 | expath = Strsave(pv[0]); |
| 183 | #ifdef VFORK |
| 184 | Vexpath = expath; |
| 185 | #endif /* VFORK */ |
| 186 | |
| 187 | v = adrof(STRpath); |
| 188 | if (v == 0 && expath[0] != '/' && expath[0] != '.') |
| 189 | pexerr(); |
| 190 | slash = any(short2str(expath), '/'); |
| 191 | |
| 192 | /* |
| 193 | * Glob the argument list, if necessary. Otherwise trim off the quote bits. |
| 194 | */ |
| 195 | gflag = 0; |
| 196 | av = &t->t_dcom[1]; |
| 197 | if (do_glob) |
| 198 | gflag = tglob(av); |
| 199 | if (gflag) { |
| 200 | av = globall(av, gflag); |
| 201 | if (av == 0) { |
| 202 | setname(short2str(expath)); |
| 203 | stderror(ERR_NAME | ERR_NOMATCH); |
| 204 | } |
| 205 | } |
| 206 | else |
| 207 | av = saveblk(av); |
| 208 | |
| 209 | blkfree(t->t_dcom); |
| 210 | cleanup_ignore(pv); |
| 211 | cleanup_until(pv); |
| 212 | t->t_dcom = blkspl(pv, av); |
| 213 | xfree(pv); |
| 214 | xfree(av); |
| 215 | av = t->t_dcom; |
| 216 | trim(av); |
| 217 | |
| 218 | if (*av == NULL || **av == '\0') |
| 219 | pexerr(); |
| 220 | |
| 221 | xechoit(av); /* Echo command if -x */ |
| 222 | #ifdef CLOSE_ON_EXEC |
| 223 | /* |
| 224 | * Since all internal file descriptors are set to close on exec, we don't |
| 225 | * need to close them explicitly here. Just reorient ourselves for error |
| 226 | * messages. |
| 227 | */ |
| 228 | SHIN = 0; |
| 229 | SHOUT = 1; |
| 230 | SHDIAG = 2; |
| 231 | OLDSTD = 0; |
| 232 | isoutatty = isatty(SHOUT); |
| 233 | isdiagatty = isatty(SHDIAG); |
| 234 | #else |
| 235 | closech(); /* Close random fd's */ |
| 236 | #endif |
| 237 | /* |
| 238 | * We must do this AFTER any possible forking (like `foo` in glob) so that |
| 239 | * this shell can still do subprocesses. |
| 240 | */ |
| 241 | { |
| 242 | sigset_t set; |
| 243 | sigemptyset(&set); |
| 244 | sigaddset(&set, SIGINT); |
| 245 | sigaddset(&set, SIGCHLD); |
| 246 | sigprocmask(SIG_UNBLOCK, &set, NULL); |
| 247 | } |
| 248 | pintr_disabled = 0; |
| 249 | pchild_disabled = 0; |
| 250 | |
| 251 | /* |
| 252 | * If no path, no words in path, or a / in the filename then restrict the |
| 253 | * command search. |
| 254 | */ |
| 255 | if (v == NULL || v->vec == NULL || v->vec[0] == NULL || slash) |
| 256 | pv = justabs; |
| 257 | else |
| 258 | pv = v->vec; |
| 259 | sav = Strspl(STRslash, *av);/* / command name for postpending */ |
| 260 | #ifndef VFORK |
| 261 | cleanup_push(sav, xfree); |
| 262 | #else /* VFORK */ |
| 263 | Vsav = sav; |
| 264 | #endif /* VFORK */ |
| 265 | hashval = havhash ? hashname(*av) : 0; |
| 266 | |
| 267 | i = 0; |
| 268 | #ifdef VFORK |
| 269 | hits++; |
| 270 | #endif /* VFORK */ |
| 271 | do { |
| 272 | /* |
| 273 | * Try to save time by looking at the hash table for where this command |
| 274 | * could be. If we are doing delayed hashing, then we put the names in |
| 275 | * one at a time, as the user enters them. This is kinda like Korn |
| 276 | * Shell's "tracked aliases". |
| 277 | */ |
| 278 | if (!slash && ABSOLUTEP(pv[0]) && havhash) { |
| 279 | #ifdef FASTHASH |
| 280 | if (!bit(hashval, i)) |
| 281 | goto cont; |
| 282 | #else /* OLDHASH */ |
| 283 | int hashval1 = hash(hashval, i); |
| 284 | if (!bit(xhash, hashval1)) |
| 285 | goto cont; |
| 286 | #endif /* FASTHASH */ |
| 287 | } |
| 288 | if (pv[0][0] == 0 || eq(pv[0], STRdot)) /* don't make ./xxx */ |
| 289 | texec(*av, av); |
| 290 | else { |
| 291 | dp = Strspl(*pv, sav); |
| 292 | #ifndef VFORK |
| 293 | cleanup_push(dp, xfree); |
| 294 | #else /* VFORK */ |
| 295 | Vdp = dp; |
| 296 | #endif /* VFORK */ |
| 297 | |
| 298 | texec(dp, av); |
| 299 | #ifndef VFORK |
| 300 | cleanup_until(dp); |
| 301 | #else /* VFORK */ |
| 302 | Vdp = 0; |
| 303 | xfree(dp); |
| 304 | #endif /* VFORK */ |
| 305 | } |
| 306 | #ifdef VFORK |
| 307 | misses++; |
| 308 | #endif /* VFORK */ |
| 309 | cont: |
| 310 | pv++; |
| 311 | i++; |
| 312 | } while (*pv); |
| 313 | #ifdef VFORK |
| 314 | hits--; |
| 315 | #endif /* VFORK */ |
| 316 | #ifndef VFORK |
| 317 | cleanup_until(sav); |
| 318 | #else /* VFORK */ |
| 319 | Vsav = 0; |
| 320 | xfree(sav); |
| 321 | #endif /* VFORK */ |
| 322 | pexerr(); |
| 323 | } |
| 324 | |
| 325 | static void |
| 326 | pexerr(void) |
| 327 | { |
| 328 | /* Couldn't find the damn thing */ |
| 329 | if (expath) { |
| 330 | setname(short2str(expath)); |
| 331 | #ifdef VFORK |
| 332 | Vexpath = 0; |
| 333 | #endif /* VFORK */ |
| 334 | xfree(expath); |
| 335 | expath = 0; |
| 336 | } |
| 337 | else |
| 338 | setname(""); |
| 339 | if (exerr) |
| 340 | stderror(ERR_NAME | ERR_STRING, exerr); |
| 341 | stderror(ERR_NAME | ERR_COMMAND); |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * Execute command f, arg list t. |
| 346 | * Record error message if not found. |
| 347 | * Also do shell scripts here. |
| 348 | */ |
| 349 | static void |
| 350 | texec(Char *sf, Char **st) |
| 351 | { |
| 352 | char **t; |
| 353 | char *f; |
| 354 | struct varent *v; |
| 355 | Char **vp; |
| 356 | Char *lastsh[2]; |
| 357 | char pref[2]; |
| 358 | int fd; |
| 359 | Char *st0, **ost; |
| 360 | |
| 361 | /* The order for the conversions is significant */ |
| 362 | t = short2blk(st); |
| 363 | f = short2str(sf); |
| 364 | #ifdef VFORK |
| 365 | Vt = t; |
| 366 | #endif /* VFORK */ |
| 367 | errno = 0; /* don't use a previous error */ |
| 368 | #ifdef apollo |
| 369 | /* |
| 370 | * If we try to execute an nfs mounted directory on the apollo, we |
| 371 | * hang forever. So until apollo fixes that.. |
| 372 | */ |
| 373 | { |
| 374 | struct stat stb; |
| 375 | if (stat(f, &stb) == 0 && S_ISDIR(stb.st_mode)) |
| 376 | errno = EISDIR; |
| 377 | } |
| 378 | if (errno == 0) |
| 379 | #endif /* apollo */ |
| 380 | { |
| 381 | #ifdef ISC_POSIX_EXEC_BUG |
| 382 | __setostype(0); /* "0" is "__OS_SYSV" in <sys/user.h> */ |
| 383 | #endif /* ISC_POSIX_EXEC_BUG */ |
| 384 | (void) execv(f, t); |
| 385 | #ifdef ISC_POSIX_EXEC_BUG |
| 386 | __setostype(1); /* "1" is "__OS_POSIX" in <sys/user.h> */ |
| 387 | #endif /* ISC_POSIX_EXEC_BUG */ |
| 388 | } |
| 389 | #ifdef VFORK |
| 390 | Vt = 0; |
| 391 | #endif /* VFORK */ |
| 392 | blkfree((Char **) t); |
| 393 | switch (errno) { |
| 394 | |
| 395 | case ENOEXEC: |
| 396 | #ifdef WINNT_NATIVE |
| 397 | nt_feed_to_cmd(f,t); |
| 398 | #endif /* WINNT_NATIVE */ |
| 399 | /* |
| 400 | * From: casper@fwi.uva.nl (Casper H.S. Dik) If we could not execute |
| 401 | * it, don't feed it to the shell if it looks like a binary! |
| 402 | */ |
| 403 | if ((fd = xopen(f, O_RDONLY|O_LARGEFILE)) != -1) { |
| 404 | int nread; |
| 405 | if ((nread = xread(fd, pref, 2)) == 2) { |
| 406 | if (!isprint((unsigned char)pref[0]) && |
| 407 | (pref[0] != '\n' && pref[0] != '\t')) { |
| 408 | int err; |
| 409 | |
| 410 | err = errno; |
| 411 | xclose(fd); |
| 412 | /* |
| 413 | * We *know* what ENOEXEC means. |
| 414 | */ |
| 415 | stderror(ERR_ARCH, f, strerror(err)); |
| 416 | } |
| 417 | } |
| 418 | else if (nread < 0) { |
| 419 | #ifdef convex |
| 420 | int err; |
| 421 | |
| 422 | err = errno; |
| 423 | xclose(fd); |
| 424 | /* need to print error incase the file is migrated */ |
| 425 | stderror(ERR_SYSTEM, f, strerror(err)); |
| 426 | #endif |
| 427 | } |
| 428 | #ifdef _PATH_BSHELL |
| 429 | else { |
| 430 | pref[0] = '#'; |
| 431 | pref[1] = '\0'; |
| 432 | } |
| 433 | #endif |
| 434 | } |
| 435 | #ifdef HASHBANG |
| 436 | if (fd == -1 || |
| 437 | pref[0] != '#' || pref[1] != '!' || hashbang(fd, &vp) == -1) { |
| 438 | #endif /* HASHBANG */ |
| 439 | /* |
| 440 | * If there is an alias for shell, then put the words of the alias in |
| 441 | * front of the argument list replacing the command name. Note no |
| 442 | * interpretation of the words at this point. |
| 443 | */ |
| 444 | v = adrof1(STRshell, &aliases); |
| 445 | if (v == NULL || v->vec == NULL) { |
| 446 | vp = lastsh; |
| 447 | vp[0] = adrof(STRshell) ? varval(STRshell) : STR_SHELLPATH; |
| 448 | vp[1] = NULL; |
| 449 | #ifdef _PATH_BSHELL |
| 450 | if (fd != -1 |
| 451 | # ifndef ISC /* Compatible with ISC's /bin/csh */ |
| 452 | && pref[0] != '#' |
| 453 | # endif /* ISC */ |
| 454 | ) |
| 455 | vp[0] = STR_BSHELL; |
| 456 | #endif |
| 457 | vp = saveblk(vp); |
| 458 | } |
| 459 | else |
| 460 | vp = saveblk(v->vec); |
| 461 | #ifdef HASHBANG |
| 462 | } |
| 463 | #endif /* HASHBANG */ |
| 464 | if (fd != -1) |
| 465 | xclose(fd); |
| 466 | |
| 467 | st0 = st[0]; |
| 468 | st[0] = sf; |
| 469 | ost = st; |
| 470 | st = blkspl(vp, st); /* Splice up the new arglst */ |
| 471 | ost[0] = st0; |
| 472 | sf = *st; |
| 473 | /* The order for the conversions is significant */ |
| 474 | t = short2blk(st); |
| 475 | f = short2str(sf); |
| 476 | xfree(st); |
| 477 | blkfree((Char **) vp); |
| 478 | #ifdef VFORK |
| 479 | Vt = t; |
| 480 | #endif /* VFORK */ |
| 481 | #ifdef ISC_POSIX_EXEC_BUG |
| 482 | __setostype(0); /* "0" is "__OS_SYSV" in <sys/user.h> */ |
| 483 | #endif /* ISC_POSIX_EXEC_BUG */ |
| 484 | (void) execv(f, t); |
| 485 | #ifdef ISC_POSIX_EXEC_BUG |
| 486 | __setostype(1); /* "1" is "__OS_POSIX" in <sys/user.h> */ |
| 487 | #endif /* ISC_POSIX_EXEC_BUG */ |
| 488 | #ifdef VFORK |
| 489 | Vt = 0; |
| 490 | #endif /* VFORK */ |
| 491 | blkfree((Char **) t); |
| 492 | /* The sky is falling, the sky is falling! */ |
| 493 | stderror(ERR_SYSTEM, f, strerror(errno)); |
| 494 | break; |
| 495 | |
| 496 | case ENOMEM: |
| 497 | stderror(ERR_SYSTEM, f, strerror(errno)); |
| 498 | break; |
| 499 | |
| 500 | #ifdef _IBMR2 |
| 501 | case 0: /* execv fails and returns 0! */ |
| 502 | #endif /* _IBMR2 */ |
| 503 | case ENOENT: |
| 504 | break; |
| 505 | |
| 506 | default: |
| 507 | if (exerr == 0) { |
| 508 | exerr = strerror(errno); |
| 509 | xfree(expath); |
| 510 | expath = Strsave(sf); |
| 511 | #ifdef VFORK |
| 512 | Vexpath = expath; |
| 513 | #endif /* VFORK */ |
| 514 | } |
| 515 | break; |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | struct execash_state |
| 520 | { |
| 521 | int saveIN, saveOUT, saveDIAG, saveSTD; |
| 522 | int SHIN, SHOUT, SHDIAG, OLDSTD; |
| 523 | int didfds; |
| 524 | #ifndef CLOSE_ON_EXEC |
| 525 | int didcch; |
| 526 | #endif |
| 527 | struct sigaction sigint, sigquit, sigterm; |
| 528 | }; |
| 529 | |
| 530 | static void |
| 531 | execash_cleanup(void *xstate) |
| 532 | { |
| 533 | struct execash_state *state; |
| 534 | |
| 535 | state = xstate; |
| 536 | sigaction(SIGINT, &state->sigint, NULL); |
| 537 | sigaction(SIGQUIT, &state->sigquit, NULL); |
| 538 | sigaction(SIGTERM, &state->sigterm, NULL); |
| 539 | |
| 540 | doneinp = 0; |
| 541 | #ifndef CLOSE_ON_EXEC |
| 542 | didcch = state->didcch; |
| 543 | #endif /* CLOSE_ON_EXEC */ |
| 544 | didfds = state->didfds; |
| 545 | xclose(SHIN); |
| 546 | xclose(SHOUT); |
| 547 | xclose(SHDIAG); |
| 548 | xclose(OLDSTD); |
| 549 | close_on_exec(SHIN = dmove(state->saveIN, state->SHIN), 1); |
| 550 | close_on_exec(SHOUT = dmove(state->saveOUT, state->SHOUT), 1); |
| 551 | close_on_exec(SHDIAG = dmove(state->saveDIAG, state->SHDIAG), 1); |
| 552 | close_on_exec(OLDSTD = dmove(state->saveSTD, state->OLDSTD), 1); |
| 553 | } |
| 554 | |
| 555 | /*ARGSUSED*/ |
| 556 | void |
| 557 | execash(Char **t, struct command *kp) |
| 558 | { |
| 559 | struct execash_state state; |
| 560 | |
| 561 | USE(t); |
| 562 | if (chkstop == 0 && setintr) |
| 563 | panystop(0); |
| 564 | /* |
| 565 | * Hmm, we don't really want to do that now because we might |
| 566 | * fail, but what is the choice |
| 567 | */ |
| 568 | rechist(NULL, adrof(STRsavehist) != NULL); |
| 569 | |
| 570 | |
| 571 | sigaction(SIGINT, &parintr, &state.sigint); |
| 572 | sigaction(SIGQUIT, &parintr, &state.sigquit); |
| 573 | sigaction(SIGTERM, &parterm, &state.sigterm); |
| 574 | |
| 575 | state.didfds = didfds; |
| 576 | #ifndef CLOSE_ON_EXEC |
| 577 | state.didcch = didcch; |
| 578 | #endif /* CLOSE_ON_EXEC */ |
| 579 | state.SHIN = SHIN; |
| 580 | state.SHOUT = SHOUT; |
| 581 | state.SHDIAG = SHDIAG; |
| 582 | state.OLDSTD = OLDSTD; |
| 583 | |
| 584 | (void)close_on_exec (state.saveIN = dcopy(SHIN, -1), 1); |
| 585 | (void)close_on_exec (state.saveOUT = dcopy(SHOUT, -1), 1); |
| 586 | (void)close_on_exec (state.saveDIAG = dcopy(SHDIAG, -1), 1); |
| 587 | (void)close_on_exec (state.saveSTD = dcopy(OLDSTD, -1), 1); |
| 588 | |
| 589 | lshift(kp->t_dcom, 1); |
| 590 | |
| 591 | (void)close_on_exec (SHIN = dcopy(0, -1), 1); |
| 592 | (void)close_on_exec (SHOUT = dcopy(1, -1), 1); |
| 593 | (void)close_on_exec (SHDIAG = dcopy(2, -1), 1); |
| 594 | #ifndef CLOSE_ON_EXEC |
| 595 | didcch = 0; |
| 596 | #endif /* CLOSE_ON_EXEC */ |
| 597 | didfds = 0; |
| 598 | cleanup_push(&state, execash_cleanup); |
| 599 | |
| 600 | /* |
| 601 | * Decrement the shell level |
| 602 | */ |
| 603 | shlvl(-1); |
| 604 | #ifdef WINNT_NATIVE |
| 605 | __nt_really_exec=1; |
| 606 | #endif /* WINNT_NATIVE */ |
| 607 | doexec(kp, 1); |
| 608 | |
| 609 | cleanup_until(&state); |
| 610 | } |
| 611 | |
| 612 | void |
| 613 | xechoit(Char **t) |
| 614 | { |
| 615 | if (adrof(STRecho)) { |
| 616 | int odidfds = didfds; |
| 617 | flush(); |
| 618 | haderr = 1; |
| 619 | didfds = 0; |
| 620 | blkpr(t), xputchar('\n'); |
| 621 | flush(); |
| 622 | didfds = odidfds; |
| 623 | haderr = 0; |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | /*ARGSUSED*/ |
| 628 | void |
| 629 | dohash(Char **vv, struct command *c) |
| 630 | { |
| 631 | #ifdef COMMENT |
| 632 | struct stat stb; |
| 633 | #endif |
| 634 | DIR *dirp; |
| 635 | struct dirent *dp; |
| 636 | int i = 0; |
| 637 | struct varent *v = adrof(STRpath); |
| 638 | Char **pv; |
| 639 | int hashval; |
| 640 | #ifdef WINNT_NATIVE |
| 641 | int is_windir; /* check if it is the windows directory */ |
| 642 | USE(hashval); |
| 643 | #endif /* WINNT_NATIVE */ |
| 644 | |
| 645 | USE(c); |
| 646 | #ifdef FASTHASH |
| 647 | if (vv && vv[1]) { |
| 648 | uhashlength = atoi(short2str(vv[1])); |
| 649 | if (vv[2]) { |
| 650 | uhashwidth = atoi(short2str(vv[2])); |
| 651 | if ((uhashwidth != sizeof(unsigned char)) && |
| 652 | (uhashwidth != sizeof(unsigned short)) && |
| 653 | (uhashwidth != sizeof(unsigned long))) |
| 654 | uhashwidth = 0; |
| 655 | if (vv[3]) |
| 656 | hashdebug = atoi(short2str(vv[3])); |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | if (uhashwidth) |
| 661 | hashwidth = uhashwidth; |
| 662 | else { |
| 663 | hashwidth = 0; |
| 664 | if (v == NULL) |
| 665 | return; |
| 666 | for (pv = v->vec; pv && *pv; pv++, hashwidth++) |
| 667 | continue; |
| 668 | if (hashwidth <= widthof(unsigned char)) |
| 669 | hashwidth = sizeof(unsigned char); |
| 670 | else if (hashwidth <= widthof(unsigned short)) |
| 671 | hashwidth = sizeof(unsigned short); |
| 672 | else if (hashwidth <= widthof(unsigned int)) |
| 673 | hashwidth = sizeof(unsigned int); |
| 674 | else |
| 675 | hashwidth = sizeof(unsigned long); |
| 676 | } |
| 677 | |
| 678 | if (uhashlength) |
| 679 | hashlength = uhashlength; |
| 680 | else |
| 681 | hashlength = hashwidth * (8*64);/* "average" files per dir in path */ |
| 682 | |
| 683 | xfree(xhash); |
| 684 | xhash = xcalloc(hashlength * hashwidth, 1); |
| 685 | #endif /* FASTHASH */ |
| 686 | |
| 687 | (void) getusername(NULL); /* flush the tilde cashe */ |
| 688 | tw_cmd_free(); |
| 689 | havhash = 1; |
| 690 | if (v == NULL) |
| 691 | return; |
| 692 | for (pv = v->vec; pv && *pv; pv++, i++) { |
| 693 | if (!ABSOLUTEP(pv[0])) |
| 694 | continue; |
| 695 | dirp = opendir(short2str(*pv)); |
| 696 | if (dirp == NULL) |
| 697 | continue; |
| 698 | cleanup_push(dirp, opendir_cleanup); |
| 699 | #ifdef COMMENT /* this isn't needed. opendir won't open |
| 700 | * non-dirs */ |
| 701 | if (fstat(dirp->dd_fd, &stb) < 0 || !S_ISDIR(stb.st_mode)) { |
| 702 | cleanup_until(dirp); |
| 703 | continue; |
| 704 | } |
| 705 | #endif |
| 706 | #ifdef WINNT_NATIVE |
| 707 | is_windir = nt_check_if_windir(short2str(*pv)); |
| 708 | #endif /* WINNT_NATIVE */ |
| 709 | while ((dp = readdir(dirp)) != NULL) { |
| 710 | if (dp->d_ino == 0) |
| 711 | continue; |
| 712 | if (dp->d_name[0] == '.' && |
| 713 | (dp->d_name[1] == '\0' || |
| 714 | (dp->d_name[1] == '.' && dp->d_name[2] == '\0'))) |
| 715 | continue; |
| 716 | #ifdef WINNT_NATIVE |
| 717 | nt_check_name_and_hash(is_windir, dp->d_name, i); |
| 718 | #else /* !WINNT_NATIVE*/ |
| 719 | #if defined(_UWIN) || defined(__CYGWIN__) |
| 720 | /* Turn foo.{exe,com,bat} into foo since UWIN's readdir returns |
| 721 | * the file with the .exe, .com, .bat extension |
| 722 | */ |
| 723 | { |
| 724 | ssize_t ext = strlen(dp->d_name) - 4; |
| 725 | if ((ext > 0) && (strcasecmp(&dp->d_name[ext], ".exe") == 0 || |
| 726 | strcasecmp(&dp->d_name[ext], ".bat") == 0 || |
| 727 | strcasecmp(&dp->d_name[ext], ".com") == 0)) { |
| 728 | #ifdef __CYGWIN__ |
| 729 | /* Also store the variation with extension. */ |
| 730 | hashval = hashname(str2short(dp->d_name)); |
| 731 | bis(hashval, i); |
| 732 | #endif /* __CYGWIN__ */ |
| 733 | dp->d_name[ext] = '\0'; |
| 734 | } |
| 735 | } |
| 736 | #endif /* _UWIN || __CYGWIN__ */ |
| 737 | # ifdef FASTHASH |
| 738 | hashval = hashname(str2short(dp->d_name)); |
| 739 | bis(hashval, i); |
| 740 | if (hashdebug & 1) |
| 741 | xprintf(CGETS(13, 1, "hash=%-4d dir=%-2d prog=%s\n"), |
| 742 | hashname(str2short(dp->d_name)), i, dp->d_name); |
| 743 | # else /* OLD HASH */ |
| 744 | hashval = hash(hashname(str2short(dp->d_name)), i); |
| 745 | bis(xhash, hashval); |
| 746 | # endif /* FASTHASH */ |
| 747 | /* tw_add_comm_name (dp->d_name); */ |
| 748 | #endif /* WINNT_NATIVE */ |
| 749 | } |
| 750 | cleanup_until(dirp); |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | /*ARGSUSED*/ |
| 755 | void |
| 756 | dounhash(Char **v, struct command *c) |
| 757 | { |
| 758 | USE(c); |
| 759 | USE(v); |
| 760 | havhash = 0; |
| 761 | #ifdef FASTHASH |
| 762 | xfree(xhash); |
| 763 | xhash = NULL; |
| 764 | #endif /* FASTHASH */ |
| 765 | } |
| 766 | |
| 767 | /*ARGSUSED*/ |
| 768 | void |
| 769 | hashstat(Char **v, struct command *c) |
| 770 | { |
| 771 | USE(c); |
| 772 | USE(v); |
| 773 | #ifdef FASTHASH |
| 774 | if (havhash && hashlength && hashwidth) |
| 775 | xprintf(CGETS(13, 2, "%d hash buckets of %d bits each\n"), |
| 776 | hashlength, hashwidth*8); |
| 777 | if (hashdebug) |
| 778 | xprintf(CGETS(13, 3, "debug mask = 0x%08x\n"), hashdebug); |
| 779 | #endif /* FASTHASH */ |
| 780 | #ifdef VFORK |
| 781 | if (hits + misses) |
| 782 | xprintf(CGETS(13, 4, "%d hits, %d misses, %d%%\n"), |
| 783 | hits, misses, 100 * hits / (hits + misses)); |
| 784 | #endif |
| 785 | } |
| 786 | |
| 787 | |
| 788 | /* |
| 789 | * Hash a command name. |
| 790 | */ |
| 791 | int |
| 792 | hashname(Char *cp) |
| 793 | { |
| 794 | unsigned long h; |
| 795 | |
| 796 | for (h = 0; *cp; cp++) |
| 797 | h = hash(h, *cp); |
| 798 | return ((int) h); |
| 799 | } |
| 800 | |
| 801 | static int |
| 802 | iscommand(Char *name) |
| 803 | { |
| 804 | Char **pv; |
| 805 | Char *sav; |
| 806 | struct varent *v; |
| 807 | int slash = any(short2str(name), '/'); |
| 808 | int hashval, i; |
| 809 | |
| 810 | v = adrof(STRpath); |
| 811 | if (v == NULL || v->vec == NULL || v->vec[0] == NULL || slash) |
| 812 | pv = justabs; |
| 813 | else |
| 814 | pv = v->vec; |
| 815 | sav = Strspl(STRslash, name); /* / command name for postpending */ |
| 816 | hashval = havhash ? hashname(name) : 0; |
| 817 | i = 0; |
| 818 | do { |
| 819 | if (!slash && ABSOLUTEP(pv[0]) && havhash) { |
| 820 | #ifdef FASTHASH |
| 821 | if (!bit(hashval, i)) |
| 822 | goto cont; |
| 823 | #else /* OLDHASH */ |
| 824 | int hashval1 = hash(hashval, i); |
| 825 | if (!bit(xhash, hashval1)) |
| 826 | goto cont; |
| 827 | #endif /* FASTHASH */ |
| 828 | } |
| 829 | if (pv[0][0] == 0 || eq(pv[0], STRdot)) { /* don't make ./xxx */ |
| 830 | if (executable(NULL, name, 0)) { |
| 831 | xfree(sav); |
| 832 | return i + 1; |
| 833 | } |
| 834 | } |
| 835 | else { |
| 836 | if (executable(*pv, sav, 0)) { |
| 837 | xfree(sav); |
| 838 | return i + 1; |
| 839 | } |
| 840 | } |
| 841 | cont: |
| 842 | pv++; |
| 843 | i++; |
| 844 | } while (*pv); |
| 845 | xfree(sav); |
| 846 | return 0; |
| 847 | } |
| 848 | |
| 849 | /* Also by: |
| 850 | * Andreas Luik <luik@isaak.isa.de> |
| 851 | * I S A GmbH - Informationssysteme fuer computerintegrierte Automatisierung |
| 852 | * Azenberstr. 35 |
| 853 | * D-7000 Stuttgart 1 |
| 854 | * West-Germany |
| 855 | * is the executable() routine below and changes to iscommand(). |
| 856 | * Thanks again!! |
| 857 | */ |
| 858 | |
| 859 | #ifndef WINNT_NATIVE |
| 860 | /* |
| 861 | * executable() examines the pathname obtained by concatenating dir and name |
| 862 | * (dir may be NULL), and returns 1 either if it is executable by us, or |
| 863 | * if dir_ok is set and the pathname refers to a directory. |
| 864 | * This is a bit kludgy, but in the name of optimization... |
| 865 | */ |
| 866 | int |
| 867 | executable(const Char *dir, const Char *name, int dir_ok) |
| 868 | { |
| 869 | struct stat stbuf; |
| 870 | char *strname; |
| 871 | |
| 872 | if (dir && *dir) { |
| 873 | Char *path; |
| 874 | |
| 875 | path = Strspl(dir, name); |
| 876 | strname = short2str(path); |
| 877 | xfree(path); |
| 878 | } |
| 879 | else |
| 880 | strname = short2str(name); |
| 881 | |
| 882 | return (stat(strname, &stbuf) != -1 && |
| 883 | ((dir_ok && S_ISDIR(stbuf.st_mode)) || |
| 884 | (S_ISREG(stbuf.st_mode) && |
| 885 | /* save time by not calling access() in the hopeless case */ |
| 886 | (stbuf.st_mode & (S_IXOTH | S_IXGRP | S_IXUSR)) && |
| 887 | access(strname, X_OK) == 0 |
| 888 | ))); |
| 889 | } |
| 890 | #endif /*!WINNT_NATIVE*/ |
| 891 | |
| 892 | struct tellmewhat_s0_cleanup |
| 893 | { |
| 894 | Char **dest, *val; |
| 895 | }; |
| 896 | |
| 897 | static void |
| 898 | tellmewhat_s0_cleanup(void *xstate) |
| 899 | { |
| 900 | struct tellmewhat_s0_cleanup *state; |
| 901 | |
| 902 | state = xstate; |
| 903 | *state->dest = state->val; |
| 904 | } |
| 905 | |
| 906 | int |
| 907 | tellmewhat(struct wordent *lexp, Char **str) |
| 908 | { |
| 909 | struct tellmewhat_s0_cleanup s0; |
| 910 | int i; |
| 911 | const struct biltins *bptr; |
| 912 | struct wordent *sp = lexp->next; |
| 913 | int aliased = 0, found; |
| 914 | Char *s1, *s2, *cmd; |
| 915 | Char qc; |
| 916 | |
| 917 | if (adrof1(sp->word, &aliases)) { |
| 918 | alias(lexp); |
| 919 | sp = lexp->next; |
| 920 | aliased = 1; |
| 921 | } |
| 922 | |
| 923 | s0.dest = &sp->word; /* to get the memory freeing right... */ |
| 924 | s0.val = sp->word; |
| 925 | cleanup_push(&s0, tellmewhat_s0_cleanup); |
| 926 | |
| 927 | /* handle quoted alias hack */ |
| 928 | if ((*(sp->word) & (QUOTE | TRIM)) == QUOTE) |
| 929 | (sp->word)++; |
| 930 | |
| 931 | /* do quoting, if it hasn't been done */ |
| 932 | s1 = s2 = sp->word; |
| 933 | while (*s2) |
| 934 | switch (*s2) { |
| 935 | case '\'': |
| 936 | case '"': |
| 937 | qc = *s2++; |
| 938 | while (*s2 && *s2 != qc) |
| 939 | *s1++ = *s2++ | QUOTE; |
| 940 | if (*s2) |
| 941 | s2++; |
| 942 | break; |
| 943 | case '\\': |
| 944 | if (*++s2) |
| 945 | *s1++ = *s2++ | QUOTE; |
| 946 | break; |
| 947 | default: |
| 948 | *s1++ = *s2++; |
| 949 | } |
| 950 | *s1 = '\0'; |
| 951 | |
| 952 | for (bptr = bfunc; bptr < &bfunc[nbfunc]; bptr++) { |
| 953 | if (eq(sp->word, str2short(bptr->bname))) { |
| 954 | if (str == NULL) { |
| 955 | if (aliased) |
| 956 | prlex(lexp); |
| 957 | xprintf(CGETS(13, 5, "%S: shell built-in command.\n"), |
| 958 | sp->word); |
| 959 | flush(); |
| 960 | } |
| 961 | else |
| 962 | *str = Strsave(sp->word); |
| 963 | cleanup_until(&s0); |
| 964 | return TRUE; |
| 965 | } |
| 966 | } |
| 967 | #ifdef WINNT_NATIVE |
| 968 | for (bptr = nt_bfunc; bptr < &nt_bfunc[nt_nbfunc]; bptr++) { |
| 969 | if (eq(sp->word, str2short(bptr->bname))) { |
| 970 | if (str == NULL) { |
| 971 | if (aliased) |
| 972 | prlex(lexp); |
| 973 | xprintf(CGETS(13, 5, "%S: shell built-in command.\n"), |
| 974 | sp->word); |
| 975 | flush(); |
| 976 | } |
| 977 | else |
| 978 | *str = Strsave(sp->word); |
| 979 | cleanup_until(&s0); |
| 980 | return TRUE; |
| 981 | } |
| 982 | } |
| 983 | #endif /* WINNT_NATIVE*/ |
| 984 | |
| 985 | sp->word = cmd = globone(sp->word, G_IGNORE); |
| 986 | cleanup_push(cmd, xfree); |
| 987 | |
| 988 | if ((i = iscommand(sp->word)) != 0) { |
| 989 | Char **pv; |
| 990 | struct varent *v; |
| 991 | int slash = any(short2str(sp->word), '/'); |
| 992 | |
| 993 | v = adrof(STRpath); |
| 994 | if (v == NULL || v->vec == NULL || v->vec[0] == NULL || slash) |
| 995 | pv = justabs; |
| 996 | else |
| 997 | pv = v->vec; |
| 998 | |
| 999 | pv += i - 1; |
| 1000 | if (pv[0][0] == 0 || eq(pv[0], STRdot)) { |
| 1001 | if (!slash) { |
| 1002 | sp->word = Strspl(STRdotsl, sp->word); |
| 1003 | cleanup_push(sp->word, xfree); |
| 1004 | prlex(lexp); |
| 1005 | cleanup_until(sp->word); |
| 1006 | } |
| 1007 | else |
| 1008 | prlex(lexp); |
| 1009 | } |
| 1010 | else { |
| 1011 | s1 = Strspl(*pv, STRslash); |
| 1012 | sp->word = Strspl(s1, sp->word); |
| 1013 | xfree(s1); |
| 1014 | cleanup_push(sp->word, xfree); |
| 1015 | if (str == NULL) |
| 1016 | prlex(lexp); |
| 1017 | else |
| 1018 | *str = Strsave(sp->word); |
| 1019 | cleanup_until(sp->word); |
| 1020 | } |
| 1021 | found = 1; |
| 1022 | } |
| 1023 | else { |
| 1024 | if (str == NULL) { |
| 1025 | if (aliased) |
| 1026 | prlex(lexp); |
| 1027 | xprintf(CGETS(13, 6, "%S: Command not found.\n"), sp->word); |
| 1028 | flush(); |
| 1029 | } |
| 1030 | else |
| 1031 | *str = Strsave(sp->word); |
| 1032 | found = 0; |
| 1033 | } |
| 1034 | cleanup_until(&s0); |
| 1035 | return found; |
| 1036 | } |
| 1037 | |
| 1038 | /* |
| 1039 | * Builtin to look at and list all places a command may be defined: |
| 1040 | * aliases, shell builtins, and the path. |
| 1041 | * |
| 1042 | * Marc Horowitz <marc@mit.edu> |
| 1043 | * MIT Student Information Processing Board |
| 1044 | */ |
| 1045 | |
| 1046 | /*ARGSUSED*/ |
| 1047 | void |
| 1048 | dowhere(Char **v, struct command *c) |
| 1049 | { |
| 1050 | int found = 1; |
| 1051 | USE(c); |
| 1052 | for (v++; *v; v++) |
| 1053 | found &= find_cmd(*v, 1); |
| 1054 | /* Make status nonzero if any command is not found. */ |
| 1055 | if (!found) |
| 1056 | setcopy(STRstatus, STR1, VAR_READWRITE); |
| 1057 | } |
| 1058 | |
| 1059 | int |
| 1060 | find_cmd(Char *cmd, int prt) |
| 1061 | { |
| 1062 | struct varent *var; |
| 1063 | const struct biltins *bptr; |
| 1064 | Char **pv; |
| 1065 | Char *sv; |
| 1066 | int hashval, i, ex, rval = 0; |
| 1067 | |
| 1068 | if (prt && any(short2str(cmd), '/')) { |
| 1069 | xprintf("%s", CGETS(13, 7, "where: / in command makes no sense\n")); |
| 1070 | return rval; |
| 1071 | } |
| 1072 | |
| 1073 | /* first, look for an alias */ |
| 1074 | |
| 1075 | if (prt && adrof1(cmd, &aliases)) { |
| 1076 | if ((var = adrof1(cmd, &aliases)) != NULL) { |
| 1077 | xprintf(CGETS(13, 8, "%S is aliased to "), cmd); |
| 1078 | if (var->vec != NULL) |
| 1079 | blkpr(var->vec); |
| 1080 | xputchar('\n'); |
| 1081 | rval = 1; |
| 1082 | } |
| 1083 | } |
| 1084 | |
| 1085 | /* next, look for a shell builtin */ |
| 1086 | |
| 1087 | for (bptr = bfunc; bptr < &bfunc[nbfunc]; bptr++) { |
| 1088 | if (eq(cmd, str2short(bptr->bname))) { |
| 1089 | rval = 1; |
| 1090 | if (prt) |
| 1091 | xprintf(CGETS(13, 9, "%S is a shell built-in\n"), cmd); |
| 1092 | else |
| 1093 | return rval; |
| 1094 | } |
| 1095 | } |
| 1096 | #ifdef WINNT_NATIVE |
| 1097 | for (bptr = nt_bfunc; bptr < &nt_bfunc[nt_nbfunc]; bptr++) { |
| 1098 | if (eq(cmd, str2short(bptr->bname))) { |
| 1099 | rval = 1; |
| 1100 | if (prt) |
| 1101 | xprintf(CGETS(13, 9, "%S is a shell built-in\n"), cmd); |
| 1102 | else |
| 1103 | return rval; |
| 1104 | } |
| 1105 | } |
| 1106 | #endif /* WINNT_NATIVE*/ |
| 1107 | |
| 1108 | /* last, look through the path for the command */ |
| 1109 | |
| 1110 | if ((var = adrof(STRpath)) == NULL) |
| 1111 | return rval; |
| 1112 | |
| 1113 | hashval = havhash ? hashname(cmd) : 0; |
| 1114 | |
| 1115 | sv = Strspl(STRslash, cmd); |
| 1116 | cleanup_push(sv, xfree); |
| 1117 | |
| 1118 | for (pv = var->vec, i = 0; pv && *pv; pv++, i++) { |
| 1119 | if (havhash && !eq(*pv, STRdot)) { |
| 1120 | #ifdef FASTHASH |
| 1121 | if (!bit(hashval, i)) |
| 1122 | continue; |
| 1123 | #else /* OLDHASH */ |
| 1124 | int hashval1 = hash(hashval, i); |
| 1125 | if (!bit(xhash, hashval1)) |
| 1126 | continue; |
| 1127 | #endif /* FASTHASH */ |
| 1128 | } |
| 1129 | ex = executable(*pv, sv, 0); |
| 1130 | #ifdef FASTHASH |
| 1131 | if (!ex && (hashdebug & 2)) { |
| 1132 | xprintf("%s", CGETS(13, 10, "hash miss: ")); |
| 1133 | ex = 1; /* Force printing */ |
| 1134 | } |
| 1135 | #endif /* FASTHASH */ |
| 1136 | if (ex) { |
| 1137 | rval = 1; |
| 1138 | if (prt) { |
| 1139 | xprintf("%S/", *pv); |
| 1140 | xprintf("%S\n", cmd); |
| 1141 | } |
| 1142 | else |
| 1143 | return rval; |
| 1144 | } |
| 1145 | } |
| 1146 | cleanup_until(sv); |
| 1147 | return rval; |
| 1148 | } |
| 1149 | #ifdef WINNT_NATIVE |
| 1150 | int hashval_extern(cp) |
| 1151 | Char *cp; |
| 1152 | { |
| 1153 | return havhash?hashname(cp):0; |
| 1154 | } |
| 1155 | int bit_extern(val,i) |
| 1156 | int val; |
| 1157 | int i; |
| 1158 | { |
| 1159 | return bit(val,i); |
| 1160 | } |
| 1161 | void bis_extern(val,i) |
| 1162 | int val; |
| 1163 | int i; |
| 1164 | { |
| 1165 | bis(val,i); |
| 1166 | } |
| 1167 | #endif /* WINNT_NATIVE */ |
| 1168 | |