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 * 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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char sccsid[] = "@(#)function.c 5.17 (Berkeley) 5/24/91"; 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/stat.h> 43 #include <sys/wait.h> 44 #include <sys/mount.h> 45 #include <errno.h> 46 #include <grp.h> 47 #include <pwd.h> 48 #include <fts.h> 49 #include <unistd.h> 50 #include <tzfile.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include "find.h" 55 56 #define FIND_EQUAL 0 57 #define FIND_LESSTHAN 1 58 #define FIND_GREATER 2 59 60 #define COMPARE(a, b) { \ 61 switch(plan->flags) { \ 62 case FIND_EQUAL: \ 63 return(a == b); \ 64 case FIND_LESSTHAN: \ 65 return(a < b); \ 66 case FIND_GREATER: \ 67 return(a > b); \ 68 } \ 69 return(0); \ 70 } 71 72 static PLAN *palloc __P((enum ntype, int (*)())); 73 74 /* 75 * find_parsenum -- 76 * Parse a string of the form [+-]# and return the value. 77 */ 78 long 79 find_parsenum(plan, option, str, endch) 80 PLAN *plan; 81 char *option, *str, *endch; 82 { 83 long value; 84 char *endchar; /* pointer to character ending conversion */ 85 86 /* determine comparison from leading + or - */ 87 switch(*str) { 88 case '+': 89 ++str; 90 plan->flags = FIND_GREATER; 91 break; 92 case '-': 93 ++str; 94 plan->flags = FIND_LESSTHAN; 95 break; 96 default: 97 plan->flags = FIND_EQUAL; 98 break; 99 } 100 101 /* 102 * convert the string with strtol(). Note, if strtol() returns zero 103 * and endchar points to the beginning of the string we know we have 104 * a syntax error. 105 */ 106 value = strtol(str, &endchar, 10); 107 if (!value && endchar == str || 108 endchar[0] && (!endch || endchar[0] != *endch)) 109 err("%s: %s", option, "illegal numeric value"); 110 if (endch) 111 *endch = endchar[0]; 112 return(value); 113 } 114 115 /* 116 * -atime n functions -- 117 * 118 * True if the difference between the file access time and the 119 * current time is n 24 hour periods. 120 * 121 */ 122 f_atime(plan, entry) 123 PLAN *plan; 124 FTSENT *entry; 125 { 126 extern time_t now; 127 128 COMPARE((now - entry->fts_statb.st_atime + 129 SECSPERDAY - 1) / SECSPERDAY, plan->t_data); 130 } 131 132 PLAN * 133 c_atime(arg) 134 char *arg; 135 { 136 PLAN *new; 137 138 ftsoptions &= ~FTS_NOSTAT; 139 140 new = palloc(N_ATIME, f_atime); 141 new->t_data = find_parsenum(new, "-atime", arg, NULL); 142 return(new); 143 } 144 /* 145 * -ctime n functions -- 146 * 147 * True if the difference between the last change of file 148 * status information and the current time is n 24 hour periods. 149 */ 150 f_ctime(plan, entry) 151 PLAN *plan; 152 FTSENT *entry; 153 { 154 extern time_t now; 155 156 COMPARE((now - entry->fts_statb.st_ctime + 157 SECSPERDAY - 1) / SECSPERDAY, plan->t_data); 158 } 159 160 PLAN * 161 c_ctime(arg) 162 char *arg; 163 { 164 PLAN *new; 165 166 ftsoptions &= ~FTS_NOSTAT; 167 168 new = palloc(N_CTIME, f_ctime); 169 new->t_data = find_parsenum(new, "-ctime", arg, (char *)NULL); 170 return(new); 171 } 172 173 /* 174 * -depth functions -- 175 * 176 * Always true, causes descent of the directory hierarchy to be done 177 * so that all entries in a directory are acted on before the directory 178 * itself. 179 */ 180 /* ARGSUSED */ 181 f_always_true(plan, entry) 182 PLAN *plan; 183 FTSENT *entry; 184 { 185 return(1); 186 } 187 188 PLAN * 189 c_depth() 190 { 191 isdepth = 1; 192 193 return(palloc(N_DEPTH, f_always_true)); 194 } 195 196 /* 197 * [-exec | -ok] utility [arg ... ] ; functions -- 198 * 199 * True if the executed utility returns a zero value as exit status. 200 * The end of the primary expression is delimited by a semicolon. If 201 * "{}" occurs anywhere, it gets replaced by the current pathname. 202 * The current directory for the execution of utility is the same as 203 * the current directory when the find utility was started. 204 * 205 * The primary -ok is different in that it requests affirmation of the 206 * user before executing the utility. 207 */ 208 f_exec(plan, entry) 209 register PLAN *plan; 210 FTSENT *entry; 211 { 212 extern int dotfd; 213 register int cnt; 214 pid_t pid; 215 int status; 216 217 for (cnt = 0; plan->e_argv[cnt]; ++cnt) 218 if (plan->e_len[cnt]) 219 brace_subst(plan->e_orig[cnt], &plan->e_argv[cnt], 220 entry->fts_path, plan->e_len[cnt]); 221 222 if (plan->flags && !queryuser(plan->e_argv)) 223 return(0); 224 225 switch(pid = vfork()) { 226 case -1: 227 err("fork: %s", strerror(errno)); 228 /* NOTREACHED */ 229 case 0: 230 if (fchdir(dotfd)) { 231 (void)fprintf(stderr, 232 "find: chdir: %s\n", strerror(errno)); 233 _exit(1); 234 } 235 execvp(plan->e_argv[0], plan->e_argv); 236 (void)fprintf(stderr, 237 "find: %s: %s\n", plan->e_argv[0], strerror(errno)); 238 _exit(1); 239 } 240 pid = waitpid(pid, &status, 0); 241 return(pid != -1 && WIFEXITED(status) && !WEXITSTATUS(status)); 242 } 243 244 /* 245 * c_exec -- 246 * build three parallel arrays, one with pointers to the strings passed 247 * on the command line, one with (possibly duplicated) pointers to the 248 * argv array, and one with integer values that are lengths of the 249 * strings, but also flags meaning that the string has to be massaged. 250 */ 251 PLAN * 252 c_exec(argvp, isok) 253 char ***argvp; 254 int isok; 255 { 256 PLAN *new; /* node returned */ 257 register int cnt; 258 register char **argv, **ap, *p; 259 260 isoutput = 1; 261 262 new = palloc(N_EXEC, f_exec); 263 new->flags = isok; 264 265 for (ap = argv = *argvp;; ++ap) { 266 if (!*ap) 267 err("%s: %s", 268 isok ? "-ok" : "-exec", "no terminating \";\""); 269 if (**ap == ';') 270 break; 271 } 272 273 cnt = ap - *argvp + 1; 274 new->e_argv = (char **)emalloc((u_int)cnt * sizeof(char *)); 275 new->e_orig = (char **)emalloc((u_int)cnt * sizeof(char *)); 276 new->e_len = (int *)emalloc((u_int)cnt * sizeof(int)); 277 278 for (argv = *argvp, cnt = 0; argv < ap; ++argv, ++cnt) { 279 new->e_orig[cnt] = *argv; 280 for (p = *argv; *p; ++p) 281 if (p[0] == '{' && p[1] == '}') { 282 new->e_argv[cnt] = emalloc((u_int)MAXPATHLEN); 283 new->e_len[cnt] = MAXPATHLEN; 284 break; 285 } 286 if (!*p) { 287 new->e_argv[cnt] = *argv; 288 new->e_len[cnt] = 0; 289 } 290 } 291 new->e_argv[cnt] = new->e_orig[cnt] = NULL; 292 293 *argvp = argv + 1; 294 return(new); 295 } 296 297 /* 298 * -follow functions -- 299 * 300 * Always true, causes symbolic links to be followed on a global 301 * basis. 302 */ 303 PLAN * 304 c_follow() 305 { 306 ftsoptions &= ~FTS_PHYSICAL; 307 ftsoptions |= FTS_LOGICAL; 308 309 return(palloc(N_FOLLOW, f_always_true)); 310 } 311 312 /* 313 * -fstype functions -- 314 * 315 * True if the file is of a certain type. 316 */ 317 f_fstype(plan, entry) 318 PLAN *plan; 319 FTSENT *entry; 320 { 321 static dev_t curdev; /* need a guaranteed illegal dev value */ 322 static int first = 1; 323 struct statfs sb; 324 static short val; 325 char *p, save[2]; 326 327 /* only check when we cross mount point */ 328 if (first || curdev != entry->fts_statb.st_dev) { 329 curdev = entry->fts_statb.st_dev; 330 331 /* 332 * Statfs follows symlinks; find wants the link's file system, 333 * not where it points. 334 */ 335 if (entry->fts_info == FTS_SL || 336 entry->fts_info == FTS_SLNONE) { 337 if (p = rindex(entry->fts_accpath, '/')) 338 ++p; 339 else 340 p = entry->fts_accpath; 341 save[0] = p[0]; 342 p[0] = '.'; 343 save[1] = p[1]; 344 p[1] = '\0'; 345 346 } else 347 p = NULL; 348 349 if (statfs(entry->fts_accpath, &sb)) 350 err("%s: %s", entry->fts_accpath, strerror(errno)); 351 352 if (p) { 353 p[0] = save[0]; 354 p[1] = save[1]; 355 } 356 357 first = 0; 358 val = plan->flags == MOUNT_NONE ? sb.f_flags : sb.f_type; 359 } 360 return(plan->flags == MOUNT_NONE ? 361 val & MNT_LOCAL : val == plan->flags); 362 } 363 364 PLAN * 365 c_fstype(arg) 366 char *arg; 367 { 368 register PLAN *new; 369 370 ftsoptions &= ~FTS_NOSTAT; 371 372 new = palloc(N_FSTYPE, f_fstype); 373 switch(*arg) { 374 case 'i': 375 if (!strcmp(arg, "isofs")) { 376 new->flags = MOUNT_ISOFS; 377 return(new); 378 } 379 break; 380 case 'l': 381 if (!strcmp(arg, "local")) { 382 new->flags = MOUNT_NONE; 383 return(new); 384 } 385 break; 386 case 'm': 387 if (!strcmp(arg, "mfs")) { 388 new->flags = MOUNT_MFS; 389 return(new); 390 } 391 if (!strcmp(arg, "msdos")) { 392 new->flags = MOUNT_MSDOS; 393 return(new); 394 } 395 break; 396 case 'n': 397 if (!strcmp(arg, "nfs")) { 398 new->flags = MOUNT_NFS; 399 return(new); 400 } 401 break; 402 case 'u': 403 if (!strcmp(arg, "ufs")) { 404 new->flags = MOUNT_UFS; 405 return(new); 406 } 407 break; 408 } 409 err("unknown file type %s", arg); 410 /* NOTREACHED */ 411 } 412 413 /* 414 * -group gname functions -- 415 * 416 * True if the file belongs to the group gname. If gname is numeric and 417 * an equivalent of the getgrnam() function does not return a valid group 418 * name, gname is taken as a group ID. 419 */ 420 f_group(plan, entry) 421 PLAN *plan; 422 FTSENT *entry; 423 { 424 return(entry->fts_statb.st_gid == plan->g_data); 425 } 426 427 PLAN * 428 c_group(gname) 429 char *gname; 430 { 431 PLAN *new; 432 struct group *g; 433 gid_t gid; 434 435 ftsoptions &= ~FTS_NOSTAT; 436 437 g = getgrnam(gname); 438 if (g == NULL) { 439 gid = atoi(gname); 440 if (gid == 0 && gname[0] != '0') 441 err("%s: %s", "-group", "no such group"); 442 } else 443 gid = g->gr_gid; 444 445 new = palloc(N_GROUP, f_group); 446 new->g_data = gid; 447 return(new); 448 } 449 450 /* 451 * -inum n functions -- 452 * 453 * True if the file has inode # n. 454 */ 455 f_inum(plan, entry) 456 PLAN *plan; 457 FTSENT *entry; 458 { 459 COMPARE(entry->fts_statb.st_ino, plan->i_data); 460 } 461 462 PLAN * 463 c_inum(arg) 464 char *arg; 465 { 466 PLAN *new; 467 468 ftsoptions &= ~FTS_NOSTAT; 469 470 new = palloc(N_INUM, f_inum); 471 new->i_data = find_parsenum(new, "-inum", arg, (char *)NULL); 472 return(new); 473 } 474 475 /* 476 * -links n functions -- 477 * 478 * True if the file has n links. 479 */ 480 f_links(plan, entry) 481 PLAN *plan; 482 FTSENT *entry; 483 { 484 COMPARE(entry->fts_statb.st_nlink, plan->l_data); 485 } 486 487 PLAN * 488 c_links(arg) 489 char *arg; 490 { 491 PLAN *new; 492 493 ftsoptions &= ~FTS_NOSTAT; 494 495 new = palloc(N_LINKS, f_links); 496 new->l_data = (nlink_t)find_parsenum(new, "-links", arg, (char *)NULL); 497 return(new); 498 } 499 500 /* 501 * -ls functions -- 502 * 503 * Always true - prints the current entry to stdout in "ls" format. 504 */ 505 /* ARGSUSED */ 506 f_ls(plan, entry) 507 PLAN *plan; 508 FTSENT *entry; 509 { 510 printlong(entry->fts_path, entry->fts_accpath, &entry->fts_statb); 511 return(1); 512 } 513 514 PLAN * 515 c_ls() 516 { 517 ftsoptions &= ~FTS_NOSTAT; 518 isoutput = 1; 519 520 return(palloc(N_LS, f_ls)); 521 } 522 523 /* 524 * -name functions -- 525 * 526 * True if the basename of the filename being examined 527 * matches pattern using Pattern Matching Notation S3.14 528 */ 529 f_name(plan, entry) 530 PLAN *plan; 531 FTSENT *entry; 532 { 533 return(fnmatch(plan->c_data, entry->fts_name, FNM_QUOTE)); 534 } 535 536 PLAN * 537 c_name(pattern) 538 char *pattern; 539 { 540 PLAN *new; 541 542 new = palloc(N_NAME, f_name); 543 new->c_data = pattern; 544 return(new); 545 } 546 547 /* 548 * -newer file functions -- 549 * 550 * True if the current file has been modified more recently 551 * then the modification time of the file named by the pathname 552 * file. 553 */ 554 f_newer(plan, entry) 555 PLAN *plan; 556 FTSENT *entry; 557 { 558 return(entry->fts_statb.st_mtime > plan->t_data); 559 } 560 561 PLAN * 562 c_newer(filename) 563 char *filename; 564 { 565 PLAN *new; 566 struct stat sb; 567 568 ftsoptions &= ~FTS_NOSTAT; 569 570 if (stat(filename, &sb)) 571 err("%s: %s", filename, strerror(errno)); 572 new = palloc(N_NEWER, f_newer); 573 new->t_data = sb.st_mtime; 574 return(new); 575 } 576 577 /* 578 * -nogroup functions -- 579 * 580 * True if file belongs to a user ID for which the equivalent 581 * of the getgrnam() 9.2.1 [POSIX.1] function returns NULL. 582 */ 583 /* ARGSUSED */ 584 f_nogroup(plan, entry) 585 PLAN *plan; 586 FTSENT *entry; 587 { 588 char *group_from_gid(); 589 590 return(group_from_gid(entry->fts_statb.st_gid, 1) ? 1 : 0); 591 } 592 593 PLAN * 594 c_nogroup() 595 { 596 ftsoptions &= ~FTS_NOSTAT; 597 598 return(palloc(N_NOGROUP, f_nogroup)); 599 } 600 601 /* 602 * -nouser functions -- 603 * 604 * True if file belongs to a user ID for which the equivalent 605 * of the getpwuid() 9.2.2 [POSIX.1] function returns NULL. 606 */ 607 /* ARGSUSED */ 608 f_nouser(plan, entry) 609 PLAN *plan; 610 FTSENT *entry; 611 { 612 char *user_from_uid(); 613 614 return(user_from_uid(entry->fts_statb.st_uid, 1) ? 1 : 0); 615 } 616 617 PLAN * 618 c_nouser() 619 { 620 ftsoptions &= ~FTS_NOSTAT; 621 622 return(palloc(N_NOUSER, f_nouser)); 623 } 624 625 /* 626 * -perm functions -- 627 * 628 * The mode argument is used to represent file mode bits. If it starts 629 * with a leading digit, it's treated as an octal mode, otherwise as a 630 * symbolic mode. 631 */ 632 f_perm(plan, entry) 633 PLAN *plan; 634 FTSENT *entry; 635 { 636 mode_t mode; 637 638 mode = entry->fts_statb.st_mode & 639 (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO); 640 if (plan->flags) 641 return((plan->m_data | mode) == mode); 642 else 643 return(mode == plan->m_data); 644 /* NOTREACHED */ 645 } 646 647 PLAN * 648 c_perm(perm) 649 char *perm; 650 { 651 PLAN *new; 652 mode_t *set; 653 654 ftsoptions &= ~FTS_NOSTAT; 655 656 new = palloc(N_PERM, f_perm); 657 658 if (*perm == '-') { 659 new->flags = 1; 660 ++perm; 661 } 662 663 if ((set = setmode(perm)) == NULL) 664 err("%s: %s", "-perm", "illegal mode string"); 665 666 new->m_data = getmode(set, 0); 667 return(new); 668 } 669 670 /* 671 * -print functions -- 672 * 673 * Always true, causes the current pathame to be written to 674 * standard output. 675 */ 676 /* ARGSUSED */ 677 f_print(plan, entry) 678 PLAN *plan; 679 FTSENT *entry; 680 { 681 (void)printf("%s\n", entry->fts_path); 682 return(1); 683 } 684 685 PLAN * 686 c_print() 687 { 688 isoutput = 1; 689 690 return(palloc(N_PRINT, f_print)); 691 } 692 693 /* 694 * -prune functions -- 695 * 696 * Prune a portion of the hierarchy. 697 */ 698 /* ARGSUSED */ 699 f_prune(plan, entry) 700 PLAN *plan; 701 FTSENT *entry; 702 { 703 extern FTS *tree; 704 705 if (fts_set(tree, entry, FTS_SKIP)) 706 err("%s: %s", entry->fts_path, strerror(errno)); 707 return(1); 708 } 709 710 PLAN * 711 c_prune() 712 { 713 return(palloc(N_PRUNE, f_prune)); 714 } 715 716 /* 717 * -size n[c] functions -- 718 * 719 * True if the file size in bytes, divided by an implementation defined 720 * value and rounded up to the next integer, is n. If n is followed by 721 * a c, the size is in bytes. 722 */ 723 #define FIND_SIZE 512 724 static int divsize = 1; 725 726 f_size(plan, entry) 727 PLAN *plan; 728 FTSENT *entry; 729 { 730 off_t size; 731 732 size = divsize ? (entry->fts_statb.st_size + FIND_SIZE - 1) / 733 FIND_SIZE : entry->fts_statb.st_size; 734 COMPARE(size, plan->o_data); 735 } 736 737 PLAN * 738 c_size(arg) 739 char *arg; 740 { 741 PLAN *new; 742 char endch; 743 744 ftsoptions &= ~FTS_NOSTAT; 745 746 new = palloc(N_SIZE, f_size); 747 new->o_data = find_parsenum(new, "-size", arg, &endch); 748 if (endch == 'c') 749 divsize = 0; 750 return(new); 751 } 752 753 /* 754 * -type c functions -- 755 * 756 * True if the type of the file is c, where c is b, c, d, p, or f for 757 * block special file, character special file, directory, FIFO, or 758 * regular file, respectively. 759 */ 760 f_type(plan, entry) 761 PLAN *plan; 762 FTSENT *entry; 763 { 764 return((entry->fts_statb.st_mode & S_IFMT) == plan->m_data); 765 } 766 767 PLAN * 768 c_type(typestring) 769 char *typestring; 770 { 771 PLAN *new; 772 mode_t mask; 773 774 ftsoptions &= ~FTS_NOSTAT; 775 776 switch (typestring[0]) { 777 case 'b': 778 mask = S_IFBLK; 779 break; 780 case 'c': 781 mask = S_IFCHR; 782 break; 783 case 'd': 784 mask = S_IFDIR; 785 break; 786 case 'f': 787 mask = S_IFREG; 788 break; 789 case 'l': 790 mask = S_IFLNK; 791 break; 792 case 'p': 793 mask = S_IFIFO; 794 break; 795 case 's': 796 mask = S_IFSOCK; 797 break; 798 default: 799 err("%s: %s", "-type", "unknown type"); 800 } 801 802 new = palloc(N_TYPE, f_type); 803 new->m_data = mask; 804 return(new); 805 } 806 807 /* 808 * -user uname functions -- 809 * 810 * True if the file belongs to the user uname. If uname is numeric and 811 * an equivalent of the getpwnam() S9.2.2 [POSIX.1] function does not 812 * return a valid user name, uname is taken as a user ID. 813 */ 814 f_user(plan, entry) 815 PLAN *plan; 816 FTSENT *entry; 817 { 818 return(entry->fts_statb.st_uid == plan->u_data); 819 } 820 821 PLAN * 822 c_user(username) 823 char *username; 824 { 825 PLAN *new; 826 struct passwd *p; 827 uid_t uid; 828 829 ftsoptions &= ~FTS_NOSTAT; 830 831 p = getpwnam(username); 832 if (p == NULL) { 833 uid = atoi(username); 834 if (uid == 0 && username[0] != '0') 835 err("%s: %s", "-user", "no such user"); 836 } else 837 uid = p->pw_uid; 838 839 new = palloc(N_USER, f_user); 840 new->u_data = uid; 841 return(new); 842 } 843 844 /* 845 * -xdev functions -- 846 * 847 * Always true, causes find not to decend past directories that have a 848 * different device ID (st_dev, see stat() S5.6.2 [POSIX.1]) 849 */ 850 PLAN * 851 c_xdev() 852 { 853 ftsoptions |= FTS_XDEV; 854 855 return(palloc(N_XDEV, f_always_true)); 856 } 857 858 /* 859 * ( expression ) functions -- 860 * 861 * True if expression is true. 862 */ 863 f_expr(plan, entry) 864 PLAN *plan; 865 FTSENT *entry; 866 { 867 register PLAN *p; 868 register int state; 869 870 for (p = plan->p_data[0]; 871 p && (state = (p->eval)(p, entry)); p = p->next); 872 return(state); 873 } 874 875 /* 876 * N_OPENPAREN and N_CLOSEPAREN nodes are temporary place markers. They are 877 * eliminated during phase 2 of find_formplan() --- the '(' node is converted 878 * to a N_EXPR node containing the expression and the ')' node is discarded. 879 */ 880 PLAN * 881 c_openparen() 882 { 883 return(palloc(N_OPENPAREN, (int (*)())-1)); 884 } 885 886 PLAN * 887 c_closeparen() 888 { 889 return(palloc(N_CLOSEPAREN, (int (*)())-1)); 890 } 891 892 /* 893 * -mtime n functions -- 894 * 895 * True if the difference between the file modification time and the 896 * current time is n 24 hour periods. 897 */ 898 f_mtime(plan, entry) 899 PLAN *plan; 900 FTSENT *entry; 901 { 902 extern time_t now; 903 904 COMPARE((now - entry->fts_statb.st_mtime + SECSPERDAY - 1) / 905 SECSPERDAY, plan->t_data); 906 } 907 908 PLAN * 909 c_mtime(arg) 910 char *arg; 911 { 912 PLAN *new; 913 914 ftsoptions &= ~FTS_NOSTAT; 915 916 new = palloc(N_MTIME, f_mtime); 917 new->t_data = find_parsenum(new, "-mtime", arg, (char *)NULL); 918 return(new); 919 } 920 921 /* 922 * ! expression functions -- 923 * 924 * Negation of a primary; the unary NOT operator. 925 */ 926 f_not(plan, entry) 927 PLAN *plan; 928 FTSENT *entry; 929 { 930 register PLAN *p; 931 register int state; 932 933 for (p = plan->p_data[0]; 934 p && (state = (p->eval)(p, entry)); p = p->next); 935 return(!state); 936 } 937 938 PLAN * 939 c_not() 940 { 941 return(palloc(N_NOT, f_not)); 942 } 943 944 /* 945 * expression -o expression functions -- 946 * 947 * Alternation of primaries; the OR operator. The second expression is 948 * not evaluated if the first expression is true. 949 */ 950 f_or(plan, entry) 951 PLAN *plan; 952 FTSENT *entry; 953 { 954 register PLAN *p; 955 register int state; 956 957 for (p = plan->p_data[0]; 958 p && (state = (p->eval)(p, entry)); p = p->next); 959 960 if (state) 961 return(1); 962 963 for (p = plan->p_data[1]; 964 p && (state = (p->eval)(p, entry)); p = p->next); 965 return(state); 966 } 967 968 PLAN * 969 c_or() 970 { 971 return(palloc(N_OR, f_or)); 972 } 973 974 static PLAN * 975 palloc(t, f) 976 enum ntype t; 977 int (*f)(); 978 { 979 PLAN *new; 980 981 if (new = malloc(sizeof(PLAN))) { 982 new->type = t; 983 new->eval = f; 984 new->flags = 0; 985 new->next = NULL; 986 return(new); 987 } 988 err("%s", strerror(errno)); 989 /* NOTREACHED */ 990 } 991