1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Cimarron D. Taylor of the University of California, Berkeley. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11 #ifndef lint 12 static char sccsid[] = "@(#)function.c 5.14 (Berkeley) 03/10/91"; 13 #endif /* not lint */ 14 15 #include <sys/param.h> 16 #include <sys/stat.h> 17 #include <sys/wait.h> 18 #include <sys/mount.h> 19 #include <errno.h> 20 #include <grp.h> 21 #include <pwd.h> 22 #include <fts.h> 23 #include <unistd.h> 24 #include <tzfile.h> 25 #include <stdio.h> 26 #include <stdlib.h> 27 #include <string.h> 28 #include "find.h" 29 30 #define FIND_EQUAL 0 31 #define FIND_LESSTHAN 1 32 #define FIND_GREATER 2 33 34 #define COMPARE(a, b) { \ 35 switch(plan->flags) { \ 36 case FIND_EQUAL: \ 37 return(a == b); \ 38 case FIND_LESSTHAN: \ 39 return(a < b); \ 40 case FIND_GREATER: \ 41 return(a > b); \ 42 } \ 43 return(0); \ 44 } 45 46 #define NEW(t, f) { \ 47 new = (PLAN *)emalloc(sizeof(PLAN)); \ 48 new->type = t; \ 49 new->eval = f; \ 50 new->flags = 0; \ 51 new->next = NULL; \ 52 } 53 54 /* 55 * find_parsenum -- 56 * Parse a string of the form [+-]# and return the value. 57 */ 58 long 59 find_parsenum(plan, option, str, endch) 60 PLAN *plan; 61 char *option, *str, *endch; 62 { 63 long value; 64 char *endchar; /* pointer to character ending conversion */ 65 void bad_arg(); 66 67 /* determine comparison from leading + or - */ 68 switch(*str) { 69 case '+': 70 ++str; 71 plan->flags = FIND_GREATER; 72 break; 73 case '-': 74 ++str; 75 plan->flags = FIND_LESSTHAN; 76 break; 77 default: 78 plan->flags = FIND_EQUAL; 79 break; 80 } 81 82 /* 83 * convert the string with strtol(). Note, if strtol() returns zero 84 * and endchar points to the beginning of the string we know we have 85 * a syntax error. 86 */ 87 value = strtol(str, &endchar, 10); 88 if (!value && endchar == str || 89 endchar[0] && (!endch || endchar[0] != *endch)) 90 bad_arg(option, "illegal numeric value"); 91 if (endch) 92 *endch = endchar[0]; 93 return(value); 94 } 95 96 /* 97 * -atime n functions -- 98 * 99 * True if the difference between the file access time and the 100 * current time is n 24 hour periods. 101 * 102 */ 103 f_atime(plan, entry) 104 PLAN *plan; 105 FTSENT *entry; 106 { 107 extern time_t now; 108 109 COMPARE((now - entry->fts_statb.st_atime + 110 SECSPERDAY - 1) / SECSPERDAY, plan->t_data); 111 } 112 113 PLAN * 114 c_atime(arg) 115 char *arg; 116 { 117 PLAN *new; 118 119 ftsoptions &= ~FTS_NOSTAT; 120 121 NEW(T_ATIME, f_atime); 122 new->t_data = find_parsenum(new, "-atime", arg, (char *)NULL); 123 return(new); 124 } 125 /* 126 * -ctime n functions -- 127 * 128 * True if the difference between the last change of file 129 * status information and the current time is n 24 hour periods. 130 */ 131 f_ctime(plan, entry) 132 PLAN *plan; 133 FTSENT *entry; 134 { 135 extern time_t now; 136 137 COMPARE((now - entry->fts_statb.st_ctime + 138 SECSPERDAY - 1) / SECSPERDAY, plan->t_data); 139 } 140 141 PLAN * 142 c_ctime(arg) 143 char *arg; 144 { 145 PLAN *new; 146 147 ftsoptions &= ~FTS_NOSTAT; 148 149 NEW(T_CTIME, f_ctime); 150 new->t_data = find_parsenum(new, "-ctime", arg, (char *)NULL); 151 return(new); 152 } 153 154 /* 155 * -depth functions -- 156 * 157 * Always true, causes descent of the directory hierarchy to be done 158 * so that all entries in a directory are acted on before the directory 159 * itself. 160 */ 161 /* ARGSUSED */ 162 f_always_true(plan, entry) 163 PLAN *plan; 164 FTSENT *entry; 165 { 166 return(1); 167 } 168 169 PLAN * 170 c_depth() 171 { 172 PLAN *new; 173 174 isdepth = 1; 175 176 NEW(T_DEPTH, f_always_true); 177 return(new); 178 } 179 180 /* 181 * [-exec | -ok] utility [arg ... ] ; functions -- 182 * 183 * True if the executed utility returns a zero value as exit status. 184 * The end of the primary expression is delimited by a semicolon. If 185 * "{}" occurs anywhere, it gets replaced by the current pathname. 186 * The current directory for the execution of utility is the same as 187 * the current directory when the find utility was started. 188 * 189 * The primary -ok is different in that it requests affirmation of the 190 * user before executing the utility. 191 */ 192 f_exec(plan, entry) 193 register PLAN *plan; 194 FTSENT *entry; 195 { 196 register int cnt; 197 pid_t pid; 198 int status; 199 void brace_subst(); 200 201 for (cnt = 0; plan->e_argv[cnt]; ++cnt) 202 if (plan->e_len[cnt]) 203 brace_subst(plan->e_orig[cnt], &plan->e_argv[cnt], 204 entry->fts_accpath, plan->e_len[cnt]); 205 206 if (plan->flags && !queryuser(plan->e_argv)) 207 return(0); 208 209 switch(pid = vfork()) { 210 case -1: 211 error("fork", errno); 212 exit(1); 213 /* NOTREACHED */ 214 case 0: 215 execvp(plan->e_argv[0], plan->e_argv); 216 error(plan->e_argv[0], errno); 217 exit(1); 218 /* NOTREACHED */ 219 } 220 pid = waitpid(pid, &status, 0); 221 return(pid != -1 && WIFEXITED(status) && !WEXITSTATUS(status)); 222 } 223 224 /* 225 * c_exec -- 226 * build three parallel arrays, one with pointers to the strings passed 227 * on the command line, one with (possibly duplicated) pointers to the 228 * argv array, and one with integer values that are lengths of the 229 * strings, but also flags meaning that the string has to be massaged. 230 */ 231 PLAN * 232 c_exec(argvp, isok) 233 char ***argvp; 234 int isok; 235 { 236 PLAN *new; /* node returned */ 237 register int cnt; 238 register char **argv, **ap, *p; 239 void bad_arg(); 240 241 if (!isrelative) 242 ftsoptions |= FTS_NOCHDIR; 243 isoutput = 1; 244 245 NEW(T_EXEC, f_exec); 246 new->flags = isok; 247 248 for (ap = argv = *argvp;; ++ap) { 249 if (!*ap) 250 bad_arg(isok ? "-ok" : "-exec", "no terminating \";\""); 251 if (**ap == ';') 252 break; 253 } 254 255 cnt = ap - *argvp + 1; 256 new->e_argv = (char **)emalloc((u_int)cnt * sizeof(char *)); 257 new->e_orig = (char **)emalloc((u_int)cnt * sizeof(char *)); 258 new->e_len = (int *)emalloc((u_int)cnt * sizeof(int)); 259 260 for (argv = *argvp, cnt = 0; argv < ap; ++argv, ++cnt) { 261 new->e_orig[cnt] = *argv; 262 for (p = *argv; *p; ++p) 263 if (p[0] == '{' && p[1] == '}') { 264 new->e_argv[cnt] = emalloc((u_int)MAXPATHLEN); 265 new->e_len[cnt] = MAXPATHLEN; 266 break; 267 } 268 if (!*p) { 269 new->e_argv[cnt] = *argv; 270 new->e_len[cnt] = 0; 271 } 272 } 273 new->e_argv[cnt] = new->e_orig[cnt] = NULL; 274 275 *argvp = argv + 1; 276 return(new); 277 } 278 279 /* 280 * -follow functions -- 281 * 282 * Always true, causes symbolic links to be followed on a global 283 * basis. 284 */ 285 PLAN * 286 c_follow() 287 { 288 PLAN *new; 289 290 ftsoptions &= ~FTS_PHYSICAL; 291 ftsoptions |= FTS_LOGICAL; 292 293 NEW(T_FOLLOW, f_always_true); 294 return(new); 295 } 296 297 /* 298 * -fstype functions -- 299 * 300 * True if the file is of a certain type. 301 */ 302 f_fstype(plan, entry) 303 PLAN *plan; 304 FTSENT *entry; 305 { 306 static dev_t curdev; /* need a guaranteed illegal dev value */ 307 static int first = 1; 308 struct statfs sb; 309 static short val; 310 char *p, save[2]; 311 312 /* only check when we cross mount point */ 313 if (first || curdev != entry->fts_statb.st_dev) { 314 curdev = entry->fts_statb.st_dev; 315 316 /* 317 * Statfs follows symlinks; find wants the link's file system, 318 * not where it points. 319 */ 320 if (entry->fts_info == FTS_SL || 321 entry->fts_info == FTS_SLNONE) { 322 if (p = rindex(entry->fts_accpath, '/')) 323 ++p; 324 else 325 p = entry->fts_accpath; 326 save[0] = p[0]; 327 p[0] = '.'; 328 save[1] = p[1]; 329 p[1] = '\0'; 330 331 } else 332 p = NULL; 333 334 if (statfs(entry->fts_accpath, &sb)) { 335 error(entry->fts_accpath, errno); 336 exit(1); 337 } 338 339 if (p) { 340 p[0] = save[0]; 341 p[1] = save[1]; 342 } 343 344 first = 0; 345 val = plan->flags == MOUNT_NONE ? sb.f_flags : sb.f_type; 346 } 347 return(plan->flags == MOUNT_NONE ? 348 val & MNT_LOCAL : val == plan->flags); 349 } 350 351 PLAN * 352 c_fstype(arg) 353 char *arg; 354 { 355 register PLAN *new; 356 357 ftsoptions &= ~FTS_NOSTAT; 358 359 NEW(T_FSTYPE, f_fstype); 360 switch(*arg) { 361 case 'l': 362 if (!strcmp(arg, "local")) { 363 new->flags = MOUNT_NONE; 364 return(new); 365 } 366 break; 367 case 'm': 368 if (!strcmp(arg, "mfs")) { 369 new->flags = MOUNT_MFS; 370 return(new); 371 } 372 break; 373 case 'n': 374 if (!strcmp(arg, "nfs")) { 375 new->flags = MOUNT_NFS; 376 return(new); 377 } 378 break; 379 case 'p': 380 if (!strcmp(arg, "pc")) { 381 new->flags = MOUNT_PC; 382 return(new); 383 } 384 break; 385 case 'u': 386 if (!strcmp(arg, "ufs")) { 387 new->flags = MOUNT_UFS; 388 return(new); 389 } 390 break; 391 } 392 (void)fprintf(stderr, "find: unknown file type %s.\n", arg); 393 exit(1); 394 /* NOTREACHED */ 395 } 396 397 /* 398 * -group gname functions -- 399 * 400 * True if the file belongs to the group gname. If gname is numeric and 401 * an equivalent of the getgrnam() function does not return a valid group 402 * name, gname is taken as a group ID. 403 */ 404 f_group(plan, entry) 405 PLAN *plan; 406 FTSENT *entry; 407 { 408 return(entry->fts_statb.st_gid == plan->g_data); 409 } 410 411 PLAN * 412 c_group(gname) 413 char *gname; 414 { 415 PLAN *new; 416 struct group *g; 417 gid_t gid; 418 void bad_arg(); 419 420 ftsoptions &= ~FTS_NOSTAT; 421 422 g = getgrnam(gname); 423 if (g == NULL) { 424 gid = atoi(gname); 425 if (gid == 0 && gname[0] != '0') 426 bad_arg("-group", "no such group"); 427 } else 428 gid = g->gr_gid; 429 430 NEW(T_GROUP, f_group); 431 new->g_data = gid; 432 return(new); 433 } 434 435 /* 436 * -inum n functions -- 437 * 438 * True if the file has inode # n. 439 */ 440 f_inum(plan, entry) 441 PLAN *plan; 442 FTSENT *entry; 443 { 444 COMPARE(entry->fts_statb.st_ino, plan->i_data); 445 } 446 447 PLAN * 448 c_inum(arg) 449 char *arg; 450 { 451 PLAN *new; 452 453 ftsoptions &= ~FTS_NOSTAT; 454 455 NEW(T_INUM, f_inum); 456 new->i_data = find_parsenum(new, "-inum", arg, (char *)NULL); 457 return(new); 458 } 459 460 /* 461 * -links n functions -- 462 * 463 * True if the file has n links. 464 */ 465 f_links(plan, entry) 466 PLAN *plan; 467 FTSENT *entry; 468 { 469 COMPARE(entry->fts_statb.st_nlink, plan->l_data); 470 } 471 472 PLAN * 473 c_links(arg) 474 char *arg; 475 { 476 PLAN *new; 477 478 ftsoptions &= ~FTS_NOSTAT; 479 480 NEW(T_LINKS, f_links); 481 new->l_data = (nlink_t)find_parsenum(new, "-links", arg, (char *)NULL); 482 return(new); 483 } 484 485 /* 486 * -ls functions -- 487 * 488 * Always true - prints the current entry to stdout in "ls" format. 489 */ 490 /* ARGSUSED */ 491 f_ls(plan, entry) 492 PLAN *plan; 493 FTSENT *entry; 494 { 495 void printlong(); 496 497 printlong(entry->fts_path, entry->fts_accpath, &entry->fts_statb); 498 return(1); 499 } 500 501 PLAN * 502 c_ls() 503 { 504 PLAN *new; 505 506 ftsoptions &= ~FTS_NOSTAT; 507 isoutput = 1; 508 509 NEW(T_LS, f_ls); 510 return(new); 511 } 512 513 /* 514 * -name functions -- 515 * 516 * True if the basename of the filename being examined 517 * matches pattern using Pattern Matching Notation S3.14 518 */ 519 f_name(plan, entry) 520 PLAN *plan; 521 FTSENT *entry; 522 { 523 return(fnmatch(plan->c_data, entry->fts_name, FNM_QUOTE)); 524 } 525 526 PLAN * 527 c_name(pattern) 528 char *pattern; 529 { 530 PLAN *new; 531 532 NEW(T_NAME, f_name); 533 new->c_data = pattern; 534 return(new); 535 } 536 537 /* 538 * -newer file functions -- 539 * 540 * True if the current file has been modified more recently 541 * then the modification time of the file named by the pathname 542 * file. 543 */ 544 f_newer(plan, entry) 545 PLAN *plan; 546 FTSENT *entry; 547 { 548 return(entry->fts_statb.st_mtime > plan->t_data); 549 } 550 551 PLAN * 552 c_newer(filename) 553 char *filename; 554 { 555 PLAN *new; 556 struct stat sb; 557 558 ftsoptions &= ~FTS_NOSTAT; 559 560 if (stat(filename, &sb)) { 561 error(filename, errno); 562 exit(1); 563 } 564 NEW(T_NEWER, f_newer); 565 new->t_data = sb.st_mtime; 566 return(new); 567 } 568 569 /* 570 * -nogroup functions -- 571 * 572 * True if file belongs to a user ID for which the equivalent 573 * of the getgrnam() 9.2.1 [POSIX.1] function returns NULL. 574 */ 575 /* ARGSUSED */ 576 f_nogroup(plan, entry) 577 PLAN *plan; 578 FTSENT *entry; 579 { 580 char *group_from_gid(); 581 582 return(group_from_gid(entry->fts_statb.st_gid, 1) ? 1 : 0); 583 } 584 585 PLAN * 586 c_nogroup() 587 { 588 PLAN *new; 589 590 ftsoptions &= ~FTS_NOSTAT; 591 592 NEW(T_NOGROUP, f_nogroup); 593 return(new); 594 } 595 596 /* 597 * -nouser functions -- 598 * 599 * True if file belongs to a user ID for which the equivalent 600 * of the getpwuid() 9.2.2 [POSIX.1] function returns NULL. 601 */ 602 /* ARGSUSED */ 603 f_nouser(plan, entry) 604 PLAN *plan; 605 FTSENT *entry; 606 { 607 char *user_from_uid(); 608 609 return(user_from_uid(entry->fts_statb.st_uid, 1) ? 1 : 0); 610 } 611 612 PLAN * 613 c_nouser() 614 { 615 PLAN *new; 616 617 ftsoptions &= ~FTS_NOSTAT; 618 619 NEW(T_NOUSER, f_nouser); 620 return(new); 621 } 622 623 /* 624 * -perm functions -- 625 * 626 * The mode argument is used to represent file mode bits. If it starts 627 * with a leading digit, it's treated as an octal mode, otherwise as a 628 * symbolic mode. 629 */ 630 f_perm(plan, entry) 631 PLAN *plan; 632 FTSENT *entry; 633 { 634 mode_t mode; 635 636 mode = entry->fts_statb.st_mode & 637 (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO); 638 if (plan->flags) 639 return((plan->m_data | mode) == mode); 640 else 641 return(mode == plan->m_data); 642 /* NOTREACHED */ 643 } 644 645 PLAN * 646 c_perm(perm) 647 char *perm; 648 { 649 PLAN *new; 650 mode_t *set; 651 void bad_arg(); 652 653 ftsoptions &= ~FTS_NOSTAT; 654 655 NEW(T_PERM, f_perm); 656 657 if (*perm == '-') { 658 new->flags = 1; 659 ++perm; 660 } 661 662 if ((set = setmode(perm)) == NULL) 663 bad_arg("-perm", "illegal mode string"); 664 665 new->m_data = getmode(set, 0); 666 return(new); 667 } 668 669 /* 670 * -print functions -- 671 * 672 * Always true, causes the current pathame to be written to 673 * standard output. 674 */ 675 /* ARGSUSED */ 676 f_print(plan, entry) 677 PLAN *plan; 678 FTSENT *entry; 679 { 680 (void)printf("%s\n", entry->fts_path); 681 return(1); 682 } 683 684 PLAN * 685 c_print() 686 { 687 PLAN *new; 688 689 isoutput = 1; 690 691 NEW(T_PRINT, f_print); 692 return(new); 693 } 694 695 /* 696 * -prune functions -- 697 * 698 * Prune a portion of the hierarchy. 699 */ 700 /* ARGSUSED */ 701 f_prune(plan, entry) 702 PLAN *plan; 703 FTSENT *entry; 704 { 705 extern FTS *tree; 706 707 if (fts_set(tree, entry, FTS_SKIP)) { 708 error(entry->fts_path, errno); 709 exit(1); 710 } 711 return(1); 712 } 713 714 PLAN * 715 c_prune() 716 { 717 PLAN *new; 718 719 NEW(T_PRUNE, f_prune); 720 return(new); 721 } 722 723 /* 724 * -size n[c] functions -- 725 * 726 * True if the file size in bytes, divided by an implementation defined 727 * value and rounded up to the next integer, is n. If n is followed by 728 * a c, the size is in bytes. 729 */ 730 #define FIND_SIZE 512 731 static int divsize = 1; 732 733 f_size(plan, entry) 734 PLAN *plan; 735 FTSENT *entry; 736 { 737 off_t size; 738 739 size = divsize ? (entry->fts_statb.st_size + FIND_SIZE - 1) / 740 FIND_SIZE : entry->fts_statb.st_size; 741 COMPARE(size, plan->o_data); 742 } 743 744 PLAN * 745 c_size(arg) 746 char *arg; 747 { 748 PLAN *new; 749 char endch; 750 751 ftsoptions &= ~FTS_NOSTAT; 752 753 NEW(T_SIZE, f_size); 754 new->o_data = find_parsenum(new, "-size", arg, &endch); 755 if (endch == 'c') 756 divsize = 0; 757 return(new); 758 } 759 760 /* 761 * -type c functions -- 762 * 763 * True if the type of the file is c, where c is b, c, d, p, or f for 764 * block special file, character special file, directory, FIFO, or 765 * regular file, respectively. 766 */ 767 f_type(plan, entry) 768 PLAN *plan; 769 FTSENT *entry; 770 { 771 return((entry->fts_statb.st_mode & S_IFMT) == plan->m_data); 772 } 773 774 PLAN * 775 c_type(typestring) 776 char *typestring; 777 { 778 PLAN *new; 779 mode_t mask; 780 void bad_arg(); 781 782 ftsoptions &= ~FTS_NOSTAT; 783 784 switch (typestring[0]) { 785 case 'b': 786 mask = S_IFBLK; 787 break; 788 case 'c': 789 mask = S_IFCHR; 790 break; 791 case 'd': 792 mask = S_IFDIR; 793 break; 794 case 'f': 795 mask = S_IFREG; 796 break; 797 case 'l': 798 mask = S_IFLNK; 799 break; 800 case 'p': 801 mask = S_IFIFO; 802 break; 803 case 's': 804 mask = S_IFSOCK; 805 break; 806 default: 807 bad_arg("-type", "unknown type"); 808 } 809 810 NEW(T_TYPE, f_type); 811 new->m_data = mask; 812 return(new); 813 } 814 815 /* 816 * -user uname functions -- 817 * 818 * True if the file belongs to the user uname. If uname is numeric and 819 * an equivalent of the getpwnam() S9.2.2 [POSIX.1] function does not 820 * return a valid user name, uname is taken as a user ID. 821 */ 822 f_user(plan, entry) 823 PLAN *plan; 824 FTSENT *entry; 825 { 826 return(entry->fts_statb.st_uid == plan->u_data); 827 } 828 829 PLAN * 830 c_user(username) 831 char *username; 832 { 833 PLAN *new; 834 struct passwd *p; 835 uid_t uid; 836 void bad_arg(); 837 838 ftsoptions &= ~FTS_NOSTAT; 839 840 p = getpwnam(username); 841 if (p == NULL) { 842 uid = atoi(username); 843 if (uid == 0 && username[0] != '0') 844 bad_arg("-user", "no such user"); 845 } else 846 uid = p->pw_uid; 847 848 NEW(T_USER, f_user); 849 new->u_data = uid; 850 return(new); 851 } 852 853 /* 854 * -xdev functions -- 855 * 856 * Always true, causes find not to decend past directories that have a 857 * different device ID (st_dev, see stat() S5.6.2 [POSIX.1]) 858 */ 859 PLAN * 860 c_xdev() 861 { 862 PLAN *new; 863 864 ftsoptions |= FTS_XDEV; 865 866 NEW(T_XDEV, f_always_true); 867 return(new); 868 } 869 870 /* 871 * ( expression ) functions -- 872 * 873 * True if expression is true. 874 */ 875 f_expr(plan, entry) 876 PLAN *plan; 877 FTSENT *entry; 878 { 879 register PLAN *p; 880 register int state; 881 882 for (p = plan->p_data[0]; 883 p && (state = (p->eval)(p, entry)); p = p->next); 884 return(state); 885 } 886 887 /* 888 * T_OPENPAREN and T_CLOSEPAREN nodes are temporary place markers. They are 889 * eliminated during phase 2 of find_formplan() --- the '(' node is converted 890 * to a T_EXPR node containing the expression and the ')' node is discarded. 891 */ 892 PLAN * 893 c_openparen() 894 { 895 PLAN *new; 896 897 NEW(T_OPENPAREN, (int (*)())-1); 898 return(new); 899 } 900 901 PLAN * 902 c_closeparen() 903 { 904 PLAN *new; 905 906 NEW(T_CLOSEPAREN, (int (*)())-1); 907 return(new); 908 } 909 910 /* 911 * -mtime n functions -- 912 * 913 * True if the difference between the file modification time and the 914 * current time is n 24 hour periods. 915 */ 916 f_mtime(plan, entry) 917 PLAN *plan; 918 FTSENT *entry; 919 { 920 extern time_t now; 921 922 COMPARE((now - entry->fts_statb.st_mtime + SECSPERDAY - 1) / 923 SECSPERDAY, plan->t_data); 924 } 925 926 PLAN * 927 c_mtime(arg) 928 char *arg; 929 { 930 PLAN *new; 931 932 ftsoptions &= ~FTS_NOSTAT; 933 934 NEW(T_MTIME, f_mtime); 935 new->t_data = find_parsenum(new, "-mtime", arg, (char *)NULL); 936 return(new); 937 } 938 939 /* 940 * ! expression functions -- 941 * 942 * Negation of a primary; the unary NOT operator. 943 */ 944 f_not(plan, entry) 945 PLAN *plan; 946 FTSENT *entry; 947 { 948 register PLAN *p; 949 register int state; 950 951 for (p = plan->p_data[0]; 952 p && (state = (p->eval)(p, entry)); p = p->next); 953 return(!state); 954 } 955 956 PLAN * 957 c_not() 958 { 959 PLAN *new; 960 961 NEW(T_NOT, f_not); 962 return(new); 963 } 964 965 /* 966 * expression -o expression functions -- 967 * 968 * Alternation of primaries; the OR operator. The second expression is 969 * not evaluated if the first expression is true. 970 */ 971 f_or(plan, entry) 972 PLAN *plan; 973 FTSENT *entry; 974 { 975 register PLAN *p; 976 register int state; 977 978 for (p = plan->p_data[0]; 979 p && (state = (p->eval)(p, entry)); p = p->next); 980 981 if (state) 982 return(1); 983 984 for (p = plan->p_data[1]; 985 p && (state = (p->eval)(p, entry)); p = p->next); 986 return(state); 987 } 988 989 PLAN * 990 c_or() 991 { 992 PLAN *new; 993 994 NEW(T_OR, f_or); 995 return(new); 996 } 997