1 /* 2 * tw.init.c: Handle lists of things to complete 3 */ 4 /*- 5 * Copyright (c) 1980, 1991 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 #include "sh.h" 33 #include "tw.h" 34 #include "ed.h" 35 #include "tc.h" 36 #include "sh.proc.h" 37 38 #define TW_INCR 128 39 40 typedef struct { 41 Char **list, /* List of command names */ 42 *buff; /* Space holding command names */ 43 size_t nlist, /* Number of items */ 44 nbuff, /* Current space in name buf */ 45 tlist, /* Total space in list */ 46 tbuff; /* Total space in name buf */ 47 } stringlist_t; 48 49 50 static struct varent *tw_vptr = NULL; /* Current shell variable */ 51 static Char **tw_env = NULL; /* Current environment variable */ 52 static const Char *tw_word; /* Current word pointer */ 53 static struct KeyFuncs *tw_bind = NULL; /* List of the bindings */ 54 #ifndef HAVENOLIMIT 55 static struct limits *tw_limit = NULL; /* List of the resource limits */ 56 #endif /* HAVENOLIMIT */ 57 static int tw_index = 0; /* signal and job index */ 58 static DIR *tw_dir_fd = NULL; /* Current directory descriptor */ 59 static int tw_cmd_got = 0; /* What we need to do */ 60 static stringlist_t tw_cmd = { NULL, NULL, 0, 0, 0, 0 }; 61 static stringlist_t tw_item = { NULL, NULL, 0, 0, 0, 0 }; 62 #define TW_FL_CMD 0x01 63 #define TW_FL_ALIAS 0x02 64 #define TW_FL_BUILTIN 0x04 65 #define TW_FL_SORT 0x08 66 #define TW_FL_REL 0x10 67 68 static struct { /* Current element pointer */ 69 size_t cur; /* Current element number */ 70 Char **pathv; /* Current element in path */ 71 DIR *dfd; /* Current directory descriptor */ 72 } tw_cmd_state; 73 74 75 #define SETDIR(dfd) \ 76 { \ 77 tw_dir_fd = dfd; \ 78 if (tw_dir_fd != NULL) \ 79 rewinddir(tw_dir_fd); \ 80 } 81 82 #define CLRDIR(dfd) \ 83 if (dfd != NULL) { \ 84 pintr_disabled++; \ 85 xclosedir(dfd); \ 86 dfd = NULL; \ 87 disabled_cleanup(&pintr_disabled); \ 88 } 89 90 static Char *tw_str_add (stringlist_t *, size_t); 91 static void tw_str_free (stringlist_t *); 92 static int tw_dir_next (struct Strbuf *, DIR *); 93 static void tw_cmd_add (const Char *name); 94 static void tw_cmd_cmd (void); 95 static void tw_cmd_builtin (void); 96 static void tw_cmd_alias (void); 97 static void tw_cmd_sort (void); 98 static void tw_vptr_start (struct varent *); 99 100 101 /* tw_str_add(): 102 * Add an item to the string list 103 */ 104 static Char * 105 tw_str_add(stringlist_t *sl, size_t len) 106 { 107 Char *ptr; 108 109 if (sl->tlist <= sl->nlist) { 110 pintr_disabled++; 111 sl->tlist += TW_INCR; 112 sl->list = xrealloc(sl->list, sl->tlist * sizeof(Char *)); 113 disabled_cleanup(&pintr_disabled); 114 } 115 if (sl->tbuff <= sl->nbuff + len) { 116 size_t i; 117 118 ptr = sl->buff; 119 pintr_disabled++; 120 sl->tbuff += TW_INCR + len; 121 sl->buff = xrealloc(sl->buff, sl->tbuff * sizeof(Char)); 122 /* Re-thread the new pointer list, if changed */ 123 if (ptr != NULL && ptr != sl->buff) { 124 for (i = 0; i < sl->nlist; i++) 125 sl->list[i] = sl->buff + (sl->list[i] - ptr); 126 } 127 disabled_cleanup(&pintr_disabled); 128 } 129 ptr = sl->list[sl->nlist++] = &sl->buff[sl->nbuff]; 130 sl->nbuff += len; 131 return ptr; 132 } /* tw_str_add */ 133 134 135 /* tw_str_free(): 136 * Free a stringlist 137 */ 138 static void 139 tw_str_free(stringlist_t *sl) 140 { 141 pintr_disabled++; 142 if (sl->list) { 143 xfree(sl->list); 144 sl->list = NULL; 145 sl->tlist = sl->nlist = 0; 146 } 147 if (sl->buff) { 148 xfree(sl->buff); 149 sl->buff = NULL; 150 sl->tbuff = sl->nbuff = 0; 151 } 152 disabled_cleanup(&pintr_disabled); 153 } /* end tw_str_free */ 154 155 156 static int 157 tw_dir_next(struct Strbuf *res, DIR *dfd) 158 { 159 struct dirent *dirp; 160 161 if (dfd == NULL) 162 return 0; 163 164 if ((dirp = readdir(dfd)) != NULL) { 165 Strbuf_append(res, str2short(dirp->d_name)); 166 return 1; 167 } 168 return 0; 169 } /* end tw_dir_next */ 170 171 172 /* tw_cmd_add(): 173 * Add the name to the command list 174 */ 175 static void 176 tw_cmd_add(const Char *name) 177 { 178 size_t len; 179 180 len = Strlen(name) + 2; 181 (void) Strcpy(tw_str_add(&tw_cmd, len), name); 182 } /* end tw_cmd_add */ 183 184 185 /* tw_cmd_free(): 186 * Free the command list 187 */ 188 void 189 tw_cmd_free(void) 190 { 191 CLRDIR(tw_dir_fd) 192 tw_str_free(&tw_cmd); 193 tw_cmd_got = 0; 194 } /* end tw_cmd_free */ 195 196 /* tw_cmd_cmd(): 197 * Add system commands to the command list 198 */ 199 static void 200 tw_cmd_cmd(void) 201 { 202 DIR *dirp; 203 struct dirent *dp; 204 Char *dir = NULL, *name; 205 Char **pv; 206 struct varent *v = adrof(STRpath); 207 struct varent *recexec = adrof(STRrecognize_only_executables); 208 size_t len; 209 210 211 if (v == NULL || v->vec == NULL) /* if no path */ 212 return; 213 214 for (pv = v->vec; *pv; pv++) { 215 if (pv[0][0] != '/') { 216 tw_cmd_got |= TW_FL_REL; 217 continue; 218 } 219 220 if ((dirp = opendir(short2str(*pv))) == NULL) 221 continue; 222 223 cleanup_push(dirp, opendir_cleanup); 224 if (recexec) { 225 dir = Strspl(*pv, STRslash); 226 cleanup_push(dir, xfree); 227 } 228 while ((dp = readdir(dirp)) != NULL) { 229 #if defined(_UWIN) || defined(__CYGWIN__) 230 /* Turn foo.{exe,com,bat} into foo since UWIN's readdir returns 231 * the file with the .exe, .com, .bat extension 232 * 233 * Same for Cygwin, but only for .exe and .com extension. 234 */ 235 len = strlen(dp->d_name); 236 if (len > 4 && (strcmp(&dp->d_name[len - 4], ".exe") == 0 || 237 #ifndef __CYGWIN__ 238 strcmp(&dp->d_name[len - 4], ".bat") == 0 || 239 #endif /* !__CYGWIN__ */ 240 strcmp(&dp->d_name[len - 4], ".com") == 0)) 241 dp->d_name[len - 4] = '\0'; 242 #endif /* _UWIN || __CYGWIN__ */ 243 /* the call to executable() may make this a bit slow */ 244 name = str2short(dp->d_name); 245 if (dp->d_ino == 0 || (recexec && !executable(dir, name, 0))) 246 continue; 247 len = Strlen(name); 248 if (name[0] == '#' || /* emacs temp files */ 249 name[0] == '.' || /* .files */ 250 name[len - 1] == '~' || /* emacs backups */ 251 name[len - 1] == '%') /* textedit backups */ 252 continue; /* Ignore! */ 253 tw_cmd_add(name); 254 } 255 cleanup_until(dirp); 256 } 257 } /* end tw_cmd_cmd */ 258 259 260 /* tw_cmd_builtin(): 261 * Add builtins to the command list 262 */ 263 static void 264 tw_cmd_builtin(void) 265 { 266 const struct biltins *bptr; 267 268 for (bptr = bfunc; bptr < &bfunc[nbfunc]; bptr++) 269 if (bptr->bname) 270 tw_cmd_add(str2short(bptr->bname)); 271 #ifdef WINNT_NATIVE 272 for (bptr = nt_bfunc; bptr < &nt_bfunc[nt_nbfunc]; bptr++) 273 if (bptr->bname) 274 tw_cmd_add(str2short(bptr->bname)); 275 #endif /* WINNT_NATIVE*/ 276 } /* end tw_cmd_builtin */ 277 278 279 /* tw_cmd_alias(): 280 * Add aliases to the command list 281 */ 282 static void 283 tw_cmd_alias(void) 284 { 285 struct varent *p; 286 struct varent *c; 287 288 p = &aliases; 289 for (;;) { 290 while (p->v_left) 291 p = p->v_left; 292 x: 293 if (p->v_parent == 0) /* is it the header? */ 294 return; 295 if (p->v_name) 296 tw_cmd_add(p->v_name); 297 if (p->v_right) { 298 p = p->v_right; 299 continue; 300 } 301 do { 302 c = p; 303 p = p->v_parent; 304 } while (p->v_right == c); 305 goto x; 306 } 307 } /* end tw_cmd_alias */ 308 309 310 /* tw_cmd_sort(): 311 * Sort the command list removing duplicate elements 312 */ 313 static void 314 tw_cmd_sort(void) 315 { 316 size_t fwd, i; 317 318 pintr_disabled++; 319 /* sort the list. */ 320 qsort(tw_cmd.list, tw_cmd.nlist, sizeof(Char *), fcompare); 321 322 /* get rid of multiple entries */ 323 for (i = 0, fwd = 0; i + 1 < tw_cmd.nlist; i++) { 324 if (Strcmp(tw_cmd.list[i], tw_cmd.list[i + 1]) == 0) /* garbage */ 325 fwd++; /* increase the forward ref. count */ 326 else if (fwd) 327 tw_cmd.list[i - fwd] = tw_cmd.list[i]; 328 } 329 /* Fix fencepost error -- Theodore Ts'o <tytso@athena.mit.edu> */ 330 if (fwd) 331 tw_cmd.list[i - fwd] = tw_cmd.list[i]; 332 tw_cmd.nlist -= fwd; 333 disabled_cleanup(&pintr_disabled); 334 } /* end tw_cmd_sort */ 335 336 337 /* tw_cmd_start(): 338 * Get the command list and sort it, if not done yet. 339 * Reset the current pointer to the beginning of the command list 340 */ 341 /*ARGSUSED*/ 342 void 343 tw_cmd_start(DIR *dfd, const Char *pat) 344 { 345 static Char *defpath[] = { STRNULL, 0 }; 346 USE(pat); 347 SETDIR(dfd) 348 if ((tw_cmd_got & TW_FL_CMD) == 0) { 349 tw_cmd_free(); 350 tw_cmd_cmd(); 351 tw_cmd_got |= TW_FL_CMD; 352 } 353 if ((tw_cmd_got & TW_FL_ALIAS) == 0) { 354 tw_cmd_alias(); 355 tw_cmd_got &= ~TW_FL_SORT; 356 tw_cmd_got |= TW_FL_ALIAS; 357 } 358 if ((tw_cmd_got & TW_FL_BUILTIN) == 0) { 359 tw_cmd_builtin(); 360 tw_cmd_got &= ~TW_FL_SORT; 361 tw_cmd_got |= TW_FL_BUILTIN; 362 } 363 if ((tw_cmd_got & TW_FL_SORT) == 0) { 364 tw_cmd_sort(); 365 tw_cmd_got |= TW_FL_SORT; 366 } 367 368 tw_cmd_state.cur = 0; 369 CLRDIR(tw_cmd_state.dfd) 370 if (tw_cmd_got & TW_FL_REL) { 371 struct varent *vp = adrof(STRpath); 372 if (vp && vp->vec) 373 tw_cmd_state.pathv = vp->vec; 374 else 375 tw_cmd_state.pathv = defpath; 376 } 377 else 378 tw_cmd_state.pathv = defpath; 379 } /* tw_cmd_start */ 380 381 382 /* tw_cmd_next(): 383 * Return the next element in the command list or 384 * Look for commands in the relative path components 385 */ 386 int 387 tw_cmd_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 388 { 389 int ret = 0; 390 Char *ptr; 391 392 if (tw_cmd_state.cur < tw_cmd.nlist) { 393 *flags = TW_DIR_OK; 394 Strbuf_append(res, tw_cmd.list[tw_cmd_state.cur++]); 395 return 1; 396 } 397 398 /* 399 * We need to process relatives in the path. 400 */ 401 while ((tw_cmd_state.dfd == NULL || 402 (res->len = 0, ret = tw_dir_next(res, tw_cmd_state.dfd)) == 0) && 403 *tw_cmd_state.pathv != NULL) { 404 405 CLRDIR(tw_cmd_state.dfd) 406 407 while (*tw_cmd_state.pathv && tw_cmd_state.pathv[0][0] == '/') 408 tw_cmd_state.pathv++; 409 if ((ptr = *tw_cmd_state.pathv) != 0) { 410 res->len = 0; 411 Strbuf_append(res, ptr); 412 ret = 1; 413 /* 414 * We complete directories only on '.' should that 415 * be changed? 416 */ 417 dir->len = 0; 418 if (ptr[0] == '\0' || (ptr[0] == '.' && ptr[1] == '\0')) { 419 tw_cmd_state.dfd = opendir("."); 420 *flags = TW_DIR_OK | TW_EXEC_CHK; 421 } 422 else { 423 Strbuf_append(dir, *tw_cmd_state.pathv); 424 Strbuf_append1(dir, '/'); 425 tw_cmd_state.dfd = opendir(short2str(*tw_cmd_state.pathv)); 426 *flags = TW_EXEC_CHK; 427 } 428 Strbuf_terminate(dir); 429 tw_cmd_state.pathv++; 430 } 431 } 432 return ret; 433 } /* end tw_cmd_next */ 434 435 436 /* tw_vptr_start(): 437 * Find the first variable in the variable list 438 */ 439 static void 440 tw_vptr_start(struct varent *c) 441 { 442 tw_vptr = c; /* start at beginning of variable list */ 443 444 for (;;) { 445 while (tw_vptr->v_left) 446 tw_vptr = tw_vptr->v_left; 447 x: 448 if (tw_vptr->v_parent == 0) { /* is it the header? */ 449 tw_vptr = NULL; 450 return; 451 } 452 if (tw_vptr->v_name) 453 return; /* found first one */ 454 if (tw_vptr->v_right) { 455 tw_vptr = tw_vptr->v_right; 456 continue; 457 } 458 do { 459 c = tw_vptr; 460 tw_vptr = tw_vptr->v_parent; 461 } while (tw_vptr->v_right == c); 462 goto x; 463 } 464 } /* end tw_shvar_start */ 465 466 467 /* tw_shvar_next(): 468 * Return the next shell variable 469 */ 470 /*ARGSUSED*/ 471 int 472 tw_shvar_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 473 { 474 struct varent *p; 475 struct varent *c; 476 477 USE(flags); 478 USE(dir); 479 if ((p = tw_vptr) == NULL) 480 return 0; /* just in case */ 481 482 Strbuf_append(res, p->v_name); /* we know that this name is here now */ 483 484 /* now find the next one */ 485 for (;;) { 486 if (p->v_right) { /* if we can go right */ 487 p = p->v_right; 488 while (p->v_left) 489 p = p->v_left; 490 } 491 else { /* else go up */ 492 do { 493 c = p; 494 p = p->v_parent; 495 } while (p->v_right == c); 496 } 497 if (p->v_parent == 0) { /* is it the header? */ 498 tw_vptr = NULL; 499 return 1; 500 } 501 if (p->v_name) { 502 tw_vptr = p; /* save state for the next call */ 503 return 1; 504 } 505 } 506 } /* end tw_shvar_next */ 507 508 509 /* tw_envvar_next(): 510 * Return the next environment variable 511 */ 512 /*ARGSUSED*/ 513 int 514 tw_envvar_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 515 { 516 const Char *ps; 517 518 USE(flags); 519 USE(dir); 520 if (tw_env == NULL || *tw_env == NULL) 521 return 0; 522 for (ps = *tw_env; *ps && *ps != '='; ps++) 523 continue; 524 Strbuf_appendn(res, *tw_env, ps - *tw_env); 525 tw_env++; 526 return 1; 527 } /* end tw_envvar_next */ 528 529 530 /* tw_var_start(): 531 * Begin the list of the shell and environment variables 532 */ 533 /*ARGSUSED*/ 534 void 535 tw_var_start(DIR *dfd, const Char *pat) 536 { 537 USE(pat); 538 SETDIR(dfd) 539 tw_vptr_start(&shvhed); 540 tw_env = STR_environ; 541 } /* end tw_var_start */ 542 543 544 /* tw_alias_start(): 545 * Begin the list of the shell aliases 546 */ 547 /*ARGSUSED*/ 548 void 549 tw_alias_start(DIR *dfd, const Char *pat) 550 { 551 USE(pat); 552 SETDIR(dfd) 553 tw_vptr_start(&aliases); 554 tw_env = NULL; 555 } /* tw_alias_start */ 556 557 558 /* tw_complete_start(): 559 * Begin the list of completions 560 */ 561 /*ARGSUSED*/ 562 void 563 tw_complete_start(DIR *dfd, const Char *pat) 564 { 565 USE(pat); 566 SETDIR(dfd) 567 tw_vptr_start(&completions); 568 tw_env = NULL; 569 } /* end tw_complete_start */ 570 571 572 /* tw_var_next(): 573 * Return the next shell or environment variable 574 */ 575 int 576 tw_var_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 577 { 578 int ret = 0; 579 580 if (tw_vptr) 581 ret = tw_shvar_next(res, dir, flags); 582 if (ret == 0 && tw_env) 583 ret = tw_envvar_next(res, dir, flags); 584 return ret; 585 } /* end tw_var_next */ 586 587 588 /* tw_logname_start(): 589 * Initialize lognames to the beginning of the list 590 */ 591 /*ARGSUSED*/ 592 void 593 tw_logname_start(DIR *dfd, const Char *pat) 594 { 595 USE(pat); 596 SETDIR(dfd) 597 #ifdef HAVE_GETPWENT 598 (void) setpwent(); /* Open passwd file */ 599 #endif 600 } /* end tw_logname_start */ 601 602 603 /* tw_logname_next(): 604 * Return the next entry from the passwd file 605 */ 606 /*ARGSUSED*/ 607 int 608 tw_logname_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 609 { 610 struct passwd *pw; 611 612 /* 613 * We don't want to get interrupted inside getpwent() 614 * because the yellow pages code is not interruptible, 615 * and if we call endpwent() immediatetely after 616 * (in pintr()) we may be freeing an invalid pointer 617 */ 618 USE(flags); 619 USE(dir); 620 pintr_disabled++; 621 #ifdef HAVE_GETPWENT 622 pw = getpwent(); 623 #else 624 pw = NULL; 625 #endif 626 disabled_cleanup(&pintr_disabled); 627 628 if (pw == NULL) { 629 #ifdef YPBUGS 630 fix_yp_bugs(); 631 #endif 632 return 0; 633 } 634 Strbuf_append(res, str2short(pw->pw_name)); 635 return 1; 636 } /* end tw_logname_next */ 637 638 639 /* tw_logname_end(): 640 * Close the passwd file to finish the logname list 641 */ 642 void 643 tw_logname_end(void) 644 { 645 #ifdef YPBUGS 646 fix_yp_bugs(); 647 #endif 648 #ifdef HAVE_GETPWENT 649 (void) endpwent(); 650 #endif 651 } /* end tw_logname_end */ 652 653 654 /* tw_grpname_start(): 655 * Initialize grpnames to the beginning of the list 656 */ 657 /*ARGSUSED*/ 658 void 659 tw_grpname_start(DIR *dfd, const Char *pat) 660 { 661 USE(pat); 662 SETDIR(dfd) 663 #if !defined(_VMS_POSIX) && !defined(_OSD_POSIX) && !defined(WINNT_NATIVE) && !defined (__ANDROID__) 664 (void) setgrent(); /* Open group file */ 665 #endif /* !_VMS_POSIX && !_OSD_POSIX && !WINNT_NATIVE */ 666 } /* end tw_grpname_start */ 667 668 669 /* tw_grpname_next(): 670 * Return the next entry from the group file 671 */ 672 /*ARGSUSED*/ 673 int 674 tw_grpname_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 675 { 676 struct group *gr; 677 678 /* 679 * We don't want to get interrupted inside getgrent() 680 * because the yellow pages code is not interruptible, 681 * and if we call endgrent() immediatetely after 682 * (in pintr()) we may be freeing an invalid pointer 683 */ 684 USE(flags); 685 USE(dir); 686 pintr_disabled++; 687 #if !defined(_VMS_POSIX) && !defined(_OSD_POSIX) && !defined(WINNT_NATIVE) && !defined(__ANDROID__) 688 errno = 0; 689 while ((gr = getgrent()) == NULL && errno == EINTR) { 690 handle_pending_signals(); 691 errno = 0; 692 } 693 #else /* _VMS_POSIX || _OSD_POSIX || WINNT_NATIVE */ 694 gr = NULL; 695 #endif /* !_VMS_POSIX && !_OSD_POSIX && !WINNT_NATIVE */ 696 disabled_cleanup(&pintr_disabled); 697 698 if (gr == NULL) { 699 #ifdef YPBUGS 700 fix_yp_bugs(); 701 #endif 702 return 0; 703 } 704 Strbuf_append(res, str2short(gr->gr_name)); 705 return 1; 706 } /* end tw_grpname_next */ 707 708 709 /* tw_grpname_end(): 710 * Close the group file to finish the groupname list 711 */ 712 void 713 tw_grpname_end(void) 714 { 715 #ifdef YPBUGS 716 fix_yp_bugs(); 717 #endif 718 #if !defined(_VMS_POSIX) && !defined(_OSD_POSIX) && !defined(WINNT_NATIVE) && !defined (__ANDROID__) 719 (void) endgrent(); 720 #endif /* !_VMS_POSIX && !_OSD_POSIX && !WINNT_NATIVE */ 721 } /* end tw_grpname_end */ 722 723 /* tw_file_start(): 724 * Initialize the directory for the file list 725 */ 726 /*ARGSUSED*/ 727 void 728 tw_file_start(DIR *dfd, const Char *pat) 729 { 730 struct varent *vp; 731 USE(pat); 732 SETDIR(dfd) 733 if ((vp = adrof(STRcdpath)) != NULL) 734 tw_env = vp->vec; 735 } /* end tw_file_start */ 736 737 738 /* tw_file_next(): 739 * Return the next file in the directory 740 */ 741 int 742 tw_file_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 743 { 744 int ret = tw_dir_next(res, tw_dir_fd); 745 if (ret == 0 && (*flags & TW_DIR_OK) != 0) { 746 CLRDIR(tw_dir_fd) 747 while (tw_env && *tw_env) 748 if ((tw_dir_fd = opendir(short2str(*tw_env))) != NULL) 749 break; 750 else 751 tw_env++; 752 753 if (tw_dir_fd) { 754 dir->len = 0; 755 Strbuf_append(dir, *tw_env++); 756 Strbuf_append1(dir, '/'); 757 Strbuf_terminate(dir); 758 ret = tw_dir_next(res, tw_dir_fd); 759 } 760 } 761 return ret; 762 } /* end tw_file_next */ 763 764 765 /* tw_dir_end(): 766 * Clear directory related lists 767 */ 768 void 769 tw_dir_end(void) 770 { 771 CLRDIR(tw_dir_fd) 772 CLRDIR(tw_cmd_state.dfd) 773 } /* end tw_dir_end */ 774 775 776 /* tw_item_free(): 777 * Free the item list 778 */ 779 void 780 tw_item_free(void) 781 { 782 tw_str_free(&tw_item); 783 } /* end tw_item_free */ 784 785 786 /* tw_item_get(): 787 * Return the list of items 788 */ 789 Char ** 790 tw_item_get(void) 791 { 792 return tw_item.list; 793 } /* end tw_item_get */ 794 795 796 /* tw_item_add(): 797 * Return a new item for a Strbuf_terminate()'d s 798 */ 799 void 800 tw_item_add(const struct Strbuf *s) 801 { 802 Char *p; 803 804 p = tw_str_add(&tw_item, s->len + 1); 805 Strcpy(p, s->s); 806 } /* tw_item_add */ 807 808 809 /* tw_item_find(): 810 * Find the string if it exists in the item list 811 * end return it. 812 */ 813 Char * 814 tw_item_find(Char *str) 815 { 816 size_t i; 817 818 if (tw_item.list == NULL || str == NULL) 819 return NULL; 820 821 for (i = 0; i < tw_item.nlist; i++) 822 if (tw_item.list[i] != NULL && Strcmp(tw_item.list[i], str) == 0) 823 return tw_item.list[i]; 824 return NULL; 825 } /* end tw_item_find */ 826 827 828 /* tw_vl_start(): 829 * Initialize a variable list 830 */ 831 void 832 tw_vl_start(DIR *dfd, const Char *pat) 833 { 834 SETDIR(dfd) 835 if ((tw_vptr = adrof(pat)) != NULL) { 836 tw_env = tw_vptr->vec; 837 tw_vptr = NULL; 838 } 839 else 840 tw_env = NULL; 841 } /* end tw_vl_start */ 842 843 844 /* 845 * Initialize a word list 846 */ 847 void 848 tw_wl_start(DIR *dfd, const Char *pat) 849 { 850 SETDIR(dfd); 851 tw_word = pat; 852 } /* end tw_wl_start */ 853 854 855 /* 856 * Return the next word from the word list 857 */ 858 /*ARGSUSED*/ 859 int 860 tw_wl_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 861 { 862 const Char *p; 863 864 USE(dir); 865 USE(flags); 866 if (tw_word == NULL || tw_word[0] == '\0') 867 return 0; 868 869 while (*tw_word && Isspace(*tw_word)) tw_word++; 870 871 for (p = tw_word; *tw_word && !Isspace(*tw_word); tw_word++) 872 continue; 873 if (tw_word == p) 874 return 0; 875 Strbuf_appendn(res, p, tw_word - p); 876 if (*tw_word) 877 tw_word++; 878 return 1; 879 } /* end tw_wl_next */ 880 881 882 /* tw_bind_start(): 883 * Begin the list of the shell bindings 884 */ 885 /*ARGSUSED*/ 886 void 887 tw_bind_start(DIR *dfd, const Char *pat) 888 { 889 USE(pat); 890 SETDIR(dfd) 891 tw_bind = FuncNames; 892 } /* end tw_bind_start */ 893 894 895 /* tw_bind_next(): 896 * Begin the list of the shell bindings 897 */ 898 /*ARGSUSED*/ 899 int 900 tw_bind_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 901 { 902 USE(dir); 903 USE(flags); 904 if (tw_bind && tw_bind->name) { 905 const char *ptr; 906 907 for (ptr = tw_bind->name; *ptr != '\0'; ptr++) 908 Strbuf_append1(res, *ptr); 909 tw_bind++; 910 return 1; 911 } 912 return 0; 913 } /* end tw_bind_next */ 914 915 916 /* tw_limit_start(): 917 * Begin the list of the shell limitings 918 */ 919 /*ARGSUSED*/ 920 void 921 tw_limit_start(DIR *dfd, const Char *pat) 922 { 923 USE(pat); 924 SETDIR(dfd) 925 #ifndef HAVENOLIMIT 926 tw_limit = limits; 927 #endif /* ! HAVENOLIMIT */ 928 } /* end tw_limit_start */ 929 930 931 /* tw_limit_next(): 932 * Begin the list of the shell limitings 933 */ 934 /*ARGSUSED*/ 935 int 936 tw_limit_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 937 { 938 USE(dir); 939 USE(flags); 940 #ifndef HAVENOLIMIT 941 if (tw_limit && tw_limit->limname) { 942 const char *ptr; 943 944 for (ptr = tw_limit->limname; *ptr != '\0'; ptr++) 945 Strbuf_append1(res, *ptr); 946 tw_limit++; 947 return 1; 948 } 949 #endif /* ! HAVENOLIMIT */ 950 return 0; 951 } /* end tw_limit_next */ 952 953 954 /* tw_sig_start(): 955 * Begin the list of the shell sigings 956 */ 957 /*ARGSUSED*/ 958 void 959 tw_sig_start(DIR *dfd, const Char *pat) 960 { 961 USE(pat); 962 SETDIR(dfd) 963 tw_index = 0; 964 } /* end tw_sig_start */ 965 966 967 /* tw_sig_next(): 968 * Begin the list of the shell sigings 969 */ 970 /*ARGSUSED*/ 971 int 972 tw_sig_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 973 { 974 USE(dir); 975 USE(flags); 976 for (;tw_index < nsig; tw_index++) { 977 const char *ptr; 978 979 if (mesg[tw_index].iname == NULL) 980 continue; 981 982 for (ptr = mesg[tw_index].iname; *ptr != '\0'; ptr++) 983 Strbuf_append1(res, *ptr); 984 tw_index++; 985 return 1; 986 } 987 return 0; 988 } /* end tw_sig_next */ 989 990 991 /* tw_job_start(): 992 * Begin the list of the shell jobings 993 */ 994 /*ARGSUSED*/ 995 void 996 tw_job_start(DIR *dfd, const Char *pat) 997 { 998 USE(pat); 999 SETDIR(dfd) 1000 tw_index = 1; 1001 } /* end tw_job_start */ 1002 1003 1004 /* tw_job_next(): 1005 * Begin the list of the shell jobings 1006 */ 1007 /*ARGSUSED*/ 1008 int 1009 tw_job_next(struct Strbuf *res, struct Strbuf *dir, int *flags) 1010 { 1011 struct process *j; 1012 1013 USE(dir); 1014 USE(flags); 1015 for (;tw_index <= pmaxindex; tw_index++) { 1016 for (j = proclist.p_next; j != NULL; j = j->p_next) 1017 if (j->p_index == tw_index && j->p_procid == j->p_jobid) 1018 break; 1019 if (j == NULL) 1020 continue; 1021 Strbuf_append(res, j->p_command); 1022 tw_index++; 1023 return 1; 1024 } 1025 return 0; 1026 } /* end tw_job_next */ 1027