1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini find implementation for busybox 4 * 5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> 6 * 7 * Reworked by David Douthitt <n9ubh@callsign.net> and 8 * Matt Kraai <kraai@alumni.carnegiemellon.edu>. 9 * 10 * Licensed under the GPL version 2, see the file LICENSE in this tarball. 11 */ 12 13/* findutils-4.1.20: 14 * 15 * # find file.txt -exec 'echo {}' '{} {}' ';' 16 * find: echo file.txt: No such file or directory 17 * # find file.txt -exec 'echo' '{} {}' '; ' 18 * find: missing argument to `-exec' 19 * # find file.txt -exec 'echo {}' '{} {}' ';' junk 20 * find: paths must precede expression 21 * # find file.txt -exec 'echo {}' '{} {}' ';' junk ';' 22 * find: paths must precede expression 23 * # find file.txt -exec 'echo' '{} {}' ';' 24 * file.txt file.txt 25 * (strace: execve("/bin/echo", ["echo", "file.txt file.txt"], [ 30 vars ])) 26 * # find file.txt -exec 'echo' '{} {}' ';' -print -exec pwd ';' 27 * file.txt file.txt 28 * file.txt 29 * /tmp 30 * # find -name '*.c' -o -name '*.h' 31 * [shows files, *.c and *.h intermixed] 32 * # find file.txt -name '*f*' -o -name '*t*' 33 * file.txt 34 * # find file.txt -name '*z*' -o -name '*t*' 35 * file.txt 36 * # find file.txt -name '*f*' -o -name '*z*' 37 * file.txt 38 * 39 * # find t z -name '*t*' -print -o -name '*z*' 40 * t 41 * # find t z t z -name '*t*' -o -name '*z*' -print 42 * z 43 * z 44 * # find t z t z '(' -name '*t*' -o -name '*z*' ')' -o -print 45 * (no output) 46 */ 47 48/* Testing script 49 * ./busybox find "$@" | tee /tmp/bb_find 50 * echo ================== 51 * /path/to/gnu/find "$@" | tee /tmp/std_find 52 * echo ================== 53 * diff -u /tmp/std_find /tmp/bb_find && echo Identical 54 */ 55 56//applet:IF_FIND(APPLET_NOEXEC(find, find, _BB_DIR_USR_BIN, _BB_SUID_DROP, find)) 57 58//kbuild:lib-$(CONFIG_FIND) += find.o 59 60//config:config FIND 61//config: bool "find" 62//config: default y 63//config: help 64//config: find is used to search your system to find specified files. 65//config: 66//config:config FEATURE_FIND_PRINT0 67//config: bool "Enable -print0: NUL-terminated output" 68//config: default y 69//config: depends on FIND 70//config: help 71//config: Causes output names to be separated by a NUL character 72//config: rather than a newline. This allows names that contain 73//config: newlines and other whitespace to be more easily 74//config: interpreted by other programs. 75//config: 76//config:config FEATURE_FIND_MTIME 77//config: bool "Enable -mtime: modified time matching" 78//config: default y 79//config: depends on FIND 80//config: help 81//config: Allow searching based on the modification time of 82//config: files, in days. 83//config: 84//config:config FEATURE_FIND_MMIN 85//config: bool "Enable -mmin: modified time matching by minutes" 86//config: default y 87//config: depends on FIND 88//config: help 89//config: Allow searching based on the modification time of 90//config: files, in minutes. 91//config: 92//config:config FEATURE_FIND_PERM 93//config: bool "Enable -perm: permissions matching" 94//config: default y 95//config: depends on FIND 96//config: help 97//config: Enable searching based on file permissions. 98//config: 99//config:config FEATURE_FIND_TYPE 100//config: bool "Enable -type: file type matching (file/dir/link/...)" 101//config: default y 102//config: depends on FIND 103//config: help 104//config: Enable searching based on file type (file, 105//config: directory, socket, device, etc.). 106//config: 107//config:config FEATURE_FIND_XDEV 108//config: bool "Enable -xdev: 'stay in filesystem'" 109//config: default y 110//config: depends on FIND 111//config: help 112//config: This option allows find to restrict searches to a single filesystem. 113//config: 114//config:config FEATURE_FIND_MAXDEPTH 115//config: bool "Enable -maxdepth N" 116//config: default y 117//config: depends on FIND 118//config: help 119//config: This option enables -maxdepth N option. 120//config: 121//config:config FEATURE_FIND_NEWER 122//config: bool "Enable -newer: compare file modification times" 123//config: default y 124//config: depends on FIND 125//config: help 126//config: Support the 'find -newer' option for finding any files which have 127//config: a modified time that is more recent than the specified FILE. 128//config: 129//config:config FEATURE_FIND_INUM 130//config: bool "Enable -inum: inode number matching" 131//config: default y 132//config: depends on FIND 133//config: help 134//config: Support the 'find -inum' option for searching by inode number. 135//config: 136//config:config FEATURE_FIND_EXEC 137//config: bool "Enable -exec: execute commands" 138//config: default y 139//config: depends on FIND 140//config: help 141//config: Support the 'find -exec' option for executing commands based upon 142//config: the files matched. 143//config: 144//config:config FEATURE_FIND_USER 145//config: bool "Enable -user: username/uid matching" 146//config: default y 147//config: depends on FIND 148//config: help 149//config: Support the 'find -user' option for searching by username or uid. 150//config: 151//config:config FEATURE_FIND_GROUP 152//config: bool "Enable -group: group/gid matching" 153//config: default y 154//config: depends on FIND 155//config: help 156//config: Support the 'find -group' option for searching by group name or gid. 157//config: 158//config:config FEATURE_FIND_NOT 159//config: bool "Enable the 'not' (!) operator" 160//config: default y 161//config: depends on FIND 162//config: help 163//config: Support the '!' operator to invert the test results. 164//config: If 'Enable full-blown desktop' is enabled, then will also support 165//config: the non-POSIX notation '-not'. 166//config: 167//config:config FEATURE_FIND_DEPTH 168//config: bool "Enable -depth" 169//config: default y 170//config: depends on FIND 171//config: help 172//config: Process each directory's contents before the directory itself. 173//config: 174//config:config FEATURE_FIND_PAREN 175//config: bool "Enable parens in options" 176//config: default y 177//config: depends on FIND 178//config: help 179//config: Enable usage of parens '(' to specify logical order of arguments. 180//config: 181//config:config FEATURE_FIND_SIZE 182//config: bool "Enable -size: file size matching" 183//config: default y 184//config: depends on FIND 185//config: help 186//config: Support the 'find -size' option for searching by file size. 187//config: 188//config:config FEATURE_FIND_PRUNE 189//config: bool "Enable -prune: exclude subdirectories" 190//config: default y 191//config: depends on FIND 192//config: help 193//config: If the file is a directory, dont descend into it. Useful for 194//config: exclusion .svn and CVS directories. 195//config: 196//config:config FEATURE_FIND_DELETE 197//config: bool "Enable -delete: delete files/dirs" 198//config: default y 199//config: depends on FIND && FEATURE_FIND_DEPTH 200//config: help 201//config: Support the 'find -delete' option for deleting files and directories. 202//config: WARNING: This option can do much harm if used wrong. Busybox will not 203//config: try to protect the user from doing stupid things. Use with care. 204//config: 205//config:config FEATURE_FIND_PATH 206//config: bool "Enable -path: match pathname with shell pattern" 207//config: default y 208//config: depends on FIND 209//config: help 210//config: The -path option matches whole pathname instead of just filename. 211//config: 212//config:config FEATURE_FIND_REGEX 213//config: bool "Enable -regex: match pathname with regex" 214//config: default y 215//config: depends on FIND 216//config: help 217//config: The -regex option matches whole pathname against regular expression. 218//config: 219//config:config FEATURE_FIND_CONTEXT 220//config: bool "Enable -context: security context matching" 221//config: default n 222//config: depends on FIND && SELINUX 223//config: help 224//config: Support the 'find -context' option for matching security context. 225//config: 226//config:config FEATURE_FIND_LINKS 227//config: bool "Enable -links: link count matching" 228//config: default y 229//config: depends on FIND 230//config: help 231//config: Support the 'find -links' option for matching number of links. 232 233#include <fnmatch.h> 234#include "libbb.h" 235#if ENABLE_FEATURE_FIND_REGEX 236#include "xregex.h" 237#endif 238 239/* This is a NOEXEC applet. Be very careful! */ 240 241 242typedef int (*action_fp)(const char *fileName, const struct stat *statbuf, void *) FAST_FUNC; 243 244typedef struct { 245 action_fp f; 246#if ENABLE_FEATURE_FIND_NOT 247 bool invert; 248#endif 249} action; 250 251#define ACTS(name, ...) typedef struct { action a; __VA_ARGS__ } action_##name; 252#define ACTF(name) \ 253 static int FAST_FUNC func_##name(const char *fileName UNUSED_PARAM, \ 254 const struct stat *statbuf UNUSED_PARAM, \ 255 action_##name* ap UNUSED_PARAM) 256 257 ACTS(print) 258 ACTS(name, const char *pattern; bool iname;) 259IF_FEATURE_FIND_PATH( ACTS(path, const char *pattern;)) 260IF_FEATURE_FIND_REGEX( ACTS(regex, regex_t compiled_pattern;)) 261IF_FEATURE_FIND_PRINT0( ACTS(print0)) 262IF_FEATURE_FIND_TYPE( ACTS(type, int type_mask;)) 263IF_FEATURE_FIND_PERM( ACTS(perm, char perm_char; mode_t perm_mask;)) 264IF_FEATURE_FIND_MTIME( ACTS(mtime, char mtime_char; unsigned mtime_days;)) 265IF_FEATURE_FIND_MMIN( ACTS(mmin, char mmin_char; unsigned mmin_mins;)) 266IF_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;)) 267IF_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;)) 268IF_FEATURE_FIND_USER( ACTS(user, uid_t uid;)) 269IF_FEATURE_FIND_SIZE( ACTS(size, char size_char; off_t size;)) 270IF_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;)) 271IF_FEATURE_FIND_PAREN( ACTS(paren, action ***subexpr;)) 272IF_FEATURE_FIND_PRUNE( ACTS(prune)) 273IF_FEATURE_FIND_DELETE( ACTS(delete)) 274IF_FEATURE_FIND_EXEC( ACTS(exec, char **exec_argv; unsigned *subst_count; int exec_argc;)) 275IF_FEATURE_FIND_GROUP( ACTS(group, gid_t gid;)) 276IF_FEATURE_FIND_LINKS( ACTS(links, char links_char; int links_count;)) 277 278struct globals { 279 IF_FEATURE_FIND_XDEV(dev_t *xdev_dev;) 280 IF_FEATURE_FIND_XDEV(int xdev_count;) 281 action ***actions; 282 bool need_print; 283 recurse_flags_t recurse_flags; 284} FIX_ALIASING; 285#define G (*(struct globals*)&bb_common_bufsiz1) 286#define INIT_G() do { \ 287 struct G_sizecheck { \ 288 char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \ 289 }; \ 290 /* we have to zero it out because of NOEXEC */ \ 291 memset(&G, 0, offsetof(struct globals, need_print)); \ 292 G.need_print = 1; \ 293 G.recurse_flags = ACTION_RECURSE; \ 294} while (0) 295 296#if ENABLE_FEATURE_FIND_EXEC 297static unsigned count_subst(const char *str) 298{ 299 unsigned count = 0; 300 while ((str = strstr(str, "{}")) != NULL) { 301 count++; 302 str++; 303 } 304 return count; 305} 306 307 308static char* subst(const char *src, unsigned count, const char* filename) 309{ 310 char *buf, *dst, *end; 311 size_t flen = strlen(filename); 312 /* we replace each '{}' with filename: growth by strlen-2 */ 313 buf = dst = xmalloc(strlen(src) + count*(flen-2) + 1); 314 while ((end = strstr(src, "{}"))) { 315 memcpy(dst, src, end - src); 316 dst += end - src; 317 src = end + 2; 318 memcpy(dst, filename, flen); 319 dst += flen; 320 } 321 strcpy(dst, src); 322 return buf; 323} 324#endif 325 326/* Return values of ACTFs ('action functions') are a bit mask: 327 * bit 1=1: prune (use SKIP constant for setting it) 328 * bit 0=1: matched successfully (TRUE) 329 */ 330 331static int exec_actions(action ***appp, const char *fileName, const struct stat *statbuf) 332{ 333 int cur_group; 334 int cur_action; 335 int rc = 0; 336 action **app, *ap; 337 338 /* "action group" is a set of actions ANDed together. 339 * groups are ORed together. 340 * We simply evaluate each group until we find one in which all actions 341 * succeed. */ 342 343 /* -prune is special: if it is encountered, then we won't 344 * descend into current directory. It doesn't matter whether 345 * action group (in which -prune sits) will succeed or not: 346 * find * -prune -name 'f*' -o -name 'm*' -- prunes every dir 347 * find * -name 'f*' -o -prune -name 'm*' -- prunes all dirs 348 * not starting with 'f' */ 349 350 /* We invert TRUE bit (bit 0). Now 1 there means 'failure'. 351 * and bitwise OR in "rc |= TRUE ^ ap->f()" will: 352 * (1) make SKIP (-prune) bit stick; and (2) detect 'failure'. 353 * On return, bit is restored. */ 354 355 cur_group = -1; 356 while ((app = appp[++cur_group]) != NULL) { 357 rc &= ~TRUE; /* 'success' so far, clear TRUE bit */ 358 cur_action = -1; 359 while (1) { 360 ap = app[++cur_action]; 361 if (!ap) /* all actions in group were successful */ 362 return rc ^ TRUE; /* restore TRUE bit */ 363 rc |= TRUE ^ ap->f(fileName, statbuf, ap); 364#if ENABLE_FEATURE_FIND_NOT 365 if (ap->invert) rc ^= TRUE; 366#endif 367 if (rc & TRUE) /* current group failed, try next */ 368 break; 369 } 370 } 371 return rc ^ TRUE; /* restore TRUE bit */ 372} 373 374 375ACTF(name) 376{ 377 const char *tmp = bb_basename(fileName); 378 if (tmp != fileName && *tmp == '\0') { 379 /* "foo/bar/". Oh no... go back to 'b' */ 380 tmp--; 381 while (tmp != fileName && *--tmp != '/') 382 continue; 383 if (*tmp == '/') 384 tmp++; 385 } 386 /* Was using FNM_PERIOD flag too, 387 * but somewhere between 4.1.20 and 4.4.0 GNU find stopped using it. 388 * find -name '*foo' should match .foo too: 389 */ 390 return fnmatch(ap->pattern, tmp, (ap->iname ? FNM_CASEFOLD : 0)) == 0; 391} 392 393#if ENABLE_FEATURE_FIND_PATH 394ACTF(path) 395{ 396 return fnmatch(ap->pattern, fileName, 0) == 0; 397} 398#endif 399#if ENABLE_FEATURE_FIND_REGEX 400ACTF(regex) 401{ 402 regmatch_t match; 403 if (regexec(&ap->compiled_pattern, fileName, 1, &match, 0 /*eflags*/)) 404 return 0; /* no match */ 405 if (match.rm_so) 406 return 0; /* match doesn't start at pos 0 */ 407 if (fileName[match.rm_eo]) 408 return 0; /* match doesn't end exactly at end of pathname */ 409 return 1; 410} 411#endif 412#if ENABLE_FEATURE_FIND_TYPE 413ACTF(type) 414{ 415 return ((statbuf->st_mode & S_IFMT) == ap->type_mask); 416} 417#endif 418#if ENABLE_FEATURE_FIND_PERM 419ACTF(perm) 420{ 421 /* -perm +mode: at least one of perm_mask bits are set */ 422 if (ap->perm_char == '+') 423 return (statbuf->st_mode & ap->perm_mask) != 0; 424 /* -perm -mode: all of perm_mask are set */ 425 if (ap->perm_char == '-') 426 return (statbuf->st_mode & ap->perm_mask) == ap->perm_mask; 427 /* -perm mode: file mode must match perm_mask */ 428 return (statbuf->st_mode & 07777) == ap->perm_mask; 429} 430#endif 431#if ENABLE_FEATURE_FIND_MTIME 432ACTF(mtime) 433{ 434 time_t file_age = time(NULL) - statbuf->st_mtime; 435 time_t mtime_secs = ap->mtime_days * 24*60*60; 436 if (ap->mtime_char == '+') 437 return file_age >= mtime_secs + 24*60*60; 438 if (ap->mtime_char == '-') 439 return file_age < mtime_secs; 440 /* just numeric mtime */ 441 return file_age >= mtime_secs && file_age < (mtime_secs + 24*60*60); 442} 443#endif 444#if ENABLE_FEATURE_FIND_MMIN 445ACTF(mmin) 446{ 447 time_t file_age = time(NULL) - statbuf->st_mtime; 448 time_t mmin_secs = ap->mmin_mins * 60; 449 if (ap->mmin_char == '+') 450 return file_age >= mmin_secs + 60; 451 if (ap->mmin_char == '-') 452 return file_age < mmin_secs; 453 /* just numeric mmin */ 454 return file_age >= mmin_secs && file_age < (mmin_secs + 60); 455} 456#endif 457#if ENABLE_FEATURE_FIND_NEWER 458ACTF(newer) 459{ 460 return (ap->newer_mtime < statbuf->st_mtime); 461} 462#endif 463#if ENABLE_FEATURE_FIND_INUM 464ACTF(inum) 465{ 466 return (statbuf->st_ino == ap->inode_num); 467} 468#endif 469#if ENABLE_FEATURE_FIND_EXEC 470ACTF(exec) 471{ 472 int i, rc; 473#if ENABLE_USE_PORTABLE_CODE 474 char **argv = alloca(sizeof(char*) * (ap->exec_argc + 1)); 475#else /* gcc 4.3.1 generates smaller code: */ 476 char *argv[ap->exec_argc + 1]; 477#endif 478 for (i = 0; i < ap->exec_argc; i++) 479 argv[i] = subst(ap->exec_argv[i], ap->subst_count[i], fileName); 480 argv[i] = NULL; /* terminate the list */ 481 482 rc = spawn_and_wait(argv); 483 if (rc < 0) 484 bb_simple_perror_msg(argv[0]); 485 486 i = 0; 487 while (argv[i]) 488 free(argv[i++]); 489 return rc == 0; /* return 1 if exitcode 0 */ 490} 491#endif 492#if ENABLE_FEATURE_FIND_USER 493ACTF(user) 494{ 495 return (statbuf->st_uid == ap->uid); 496} 497#endif 498#if ENABLE_FEATURE_FIND_GROUP 499ACTF(group) 500{ 501 return (statbuf->st_gid == ap->gid); 502} 503#endif 504#if ENABLE_FEATURE_FIND_PRINT0 505ACTF(print0) 506{ 507 printf("%s%c", fileName, '\0'); 508 return TRUE; 509} 510#endif 511ACTF(print) 512{ 513 puts(fileName); 514 return TRUE; 515} 516#if ENABLE_FEATURE_FIND_PAREN 517ACTF(paren) 518{ 519 return exec_actions(ap->subexpr, fileName, statbuf); 520} 521#endif 522#if ENABLE_FEATURE_FIND_SIZE 523ACTF(size) 524{ 525 if (ap->size_char == '+') 526 return statbuf->st_size > ap->size; 527 if (ap->size_char == '-') 528 return statbuf->st_size < ap->size; 529 return statbuf->st_size == ap->size; 530} 531#endif 532#if ENABLE_FEATURE_FIND_PRUNE 533/* 534 * -prune: if -depth is not given, return true and do not descend 535 * current dir; if -depth is given, return false with no effect. 536 * Example: 537 * find dir -name 'asm-*' -prune -o -name '*.[chS]' -print 538 */ 539ACTF(prune) 540{ 541 return SKIP + TRUE; 542} 543#endif 544#if ENABLE_FEATURE_FIND_DELETE 545ACTF(delete) 546{ 547 int rc; 548 if (S_ISDIR(statbuf->st_mode)) { 549 rc = rmdir(fileName); 550 } else { 551 rc = unlink(fileName); 552 } 553 if (rc < 0) 554 bb_simple_perror_msg(fileName); 555 return TRUE; 556} 557#endif 558#if ENABLE_FEATURE_FIND_CONTEXT 559ACTF(context) 560{ 561 security_context_t con; 562 int rc; 563 564 if (G.recurse_flags & ACTION_FOLLOWLINKS) { 565 rc = getfilecon(fileName, &con); 566 } else { 567 rc = lgetfilecon(fileName, &con); 568 } 569 if (rc < 0) 570 return FALSE; 571 rc = strcmp(ap->context, con); 572 freecon(con); 573 return rc == 0; 574} 575#endif 576#if ENABLE_FEATURE_FIND_LINKS 577ACTF(links) 578{ 579 switch(ap->links_char) { 580 case '-' : return (statbuf->st_nlink < ap->links_count); 581 case '+' : return (statbuf->st_nlink > ap->links_count); 582 default: return (statbuf->st_nlink == ap->links_count); 583 } 584} 585#endif 586 587static int FAST_FUNC fileAction(const char *fileName, 588 struct stat *statbuf, 589 void *userData IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM), 590 int depth IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM)) 591{ 592 int r; 593#if ENABLE_FEATURE_FIND_MAXDEPTH 594#define minmaxdepth ((int*)userData) 595 596 if (depth < minmaxdepth[0]) 597 return TRUE; /* skip this, continue recursing */ 598 if (depth > minmaxdepth[1]) 599 return SKIP; /* stop recursing */ 600#endif 601 602 r = exec_actions(G.actions, fileName, statbuf); 603 /* Had no explicit -print[0] or -exec? then print */ 604 if ((r & TRUE) && G.need_print) 605 puts(fileName); 606 607#if ENABLE_FEATURE_FIND_MAXDEPTH 608 if (S_ISDIR(statbuf->st_mode)) { 609 if (depth == minmaxdepth[1]) 610 return SKIP; 611 } 612#endif 613#if ENABLE_FEATURE_FIND_XDEV 614 /* -xdev stops on mountpoints, but AFTER mountpoit itself 615 * is processed as usual */ 616 if (S_ISDIR(statbuf->st_mode)) { 617 if (G.xdev_count) { 618 int i; 619 for (i = 0; i < G.xdev_count; i++) { 620 if (G.xdev_dev[i] == statbuf->st_dev) 621 goto found; 622 } 623 return SKIP; 624 found: ; 625 } 626 } 627#endif 628 629 /* Cannot return 0: our caller, recursive_action(), 630 * will perror() and skip dirs (if called on dir) */ 631 return (r & SKIP) ? SKIP : TRUE; 632#undef minmaxdepth 633} 634 635 636#if ENABLE_FEATURE_FIND_TYPE 637static int find_type(const char *type) 638{ 639 int mask = 0; 640 641 if (*type == 'b') 642 mask = S_IFBLK; 643 else if (*type == 'c') 644 mask = S_IFCHR; 645 else if (*type == 'd') 646 mask = S_IFDIR; 647 else if (*type == 'p') 648 mask = S_IFIFO; 649 else if (*type == 'f') 650 mask = S_IFREG; 651 else if (*type == 'l') 652 mask = S_IFLNK; 653 else if (*type == 's') 654 mask = S_IFSOCK; 655 656 if (mask == 0 || type[1] != '\0') 657 bb_error_msg_and_die(bb_msg_invalid_arg, type, "-type"); 658 659 return mask; 660} 661#endif 662 663#if ENABLE_FEATURE_FIND_PERM \ 664 || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \ 665 || ENABLE_FEATURE_FIND_SIZE || ENABLE_FEATURE_FIND_LINKS 666static const char* plus_minus_num(const char* str) 667{ 668 if (*str == '-' || *str == '+') 669 str++; 670 return str; 671} 672#endif 673 674static action*** parse_params(char **argv) 675{ 676 enum { 677 PARM_a , 678 PARM_o , 679 IF_FEATURE_FIND_NOT( PARM_char_not ,) 680#if ENABLE_DESKTOP 681 PARM_and , 682 PARM_or , 683 IF_FEATURE_FIND_NOT( PARM_not ,) 684#endif 685 PARM_print , 686 IF_FEATURE_FIND_PRINT0( PARM_print0 ,) 687 IF_FEATURE_FIND_DEPTH( PARM_depth ,) 688 IF_FEATURE_FIND_PRUNE( PARM_prune ,) 689 IF_FEATURE_FIND_DELETE( PARM_delete ,) 690 IF_FEATURE_FIND_EXEC( PARM_exec ,) 691 IF_FEATURE_FIND_PAREN( PARM_char_brace,) 692 /* All options starting from here require argument */ 693 PARM_name , 694 PARM_iname , 695 IF_FEATURE_FIND_PATH( PARM_path ,) 696 IF_FEATURE_FIND_REGEX( PARM_regex ,) 697 IF_FEATURE_FIND_TYPE( PARM_type ,) 698 IF_FEATURE_FIND_PERM( PARM_perm ,) 699 IF_FEATURE_FIND_MTIME( PARM_mtime ,) 700 IF_FEATURE_FIND_MMIN( PARM_mmin ,) 701 IF_FEATURE_FIND_NEWER( PARM_newer ,) 702 IF_FEATURE_FIND_INUM( PARM_inum ,) 703 IF_FEATURE_FIND_USER( PARM_user ,) 704 IF_FEATURE_FIND_GROUP( PARM_group ,) 705 IF_FEATURE_FIND_SIZE( PARM_size ,) 706 IF_FEATURE_FIND_CONTEXT(PARM_context ,) 707 IF_FEATURE_FIND_LINKS( PARM_links ,) 708 }; 709 710 static const char params[] ALIGN1 = 711 "-a\0" 712 "-o\0" 713 IF_FEATURE_FIND_NOT( "!\0" ) 714#if ENABLE_DESKTOP 715 "-and\0" 716 "-or\0" 717 IF_FEATURE_FIND_NOT( "-not\0" ) 718#endif 719 "-print\0" 720 IF_FEATURE_FIND_PRINT0( "-print0\0" ) 721 IF_FEATURE_FIND_DEPTH( "-depth\0" ) 722 IF_FEATURE_FIND_PRUNE( "-prune\0" ) 723 IF_FEATURE_FIND_DELETE( "-delete\0" ) 724 IF_FEATURE_FIND_EXEC( "-exec\0" ) 725 IF_FEATURE_FIND_PAREN( "(\0" ) 726 /* All options starting from here require argument */ 727 "-name\0" 728 "-iname\0" 729 IF_FEATURE_FIND_PATH( "-path\0" ) 730 IF_FEATURE_FIND_REGEX( "-regex\0" ) 731 IF_FEATURE_FIND_TYPE( "-type\0" ) 732 IF_FEATURE_FIND_PERM( "-perm\0" ) 733 IF_FEATURE_FIND_MTIME( "-mtime\0" ) 734 IF_FEATURE_FIND_MMIN( "-mmin\0" ) 735 IF_FEATURE_FIND_NEWER( "-newer\0" ) 736 IF_FEATURE_FIND_INUM( "-inum\0" ) 737 IF_FEATURE_FIND_USER( "-user\0" ) 738 IF_FEATURE_FIND_GROUP( "-group\0" ) 739 IF_FEATURE_FIND_SIZE( "-size\0" ) 740 IF_FEATURE_FIND_CONTEXT("-context\0") 741 IF_FEATURE_FIND_LINKS( "-links\0" ) 742 ; 743 744 action*** appp; 745 unsigned cur_group = 0; 746 unsigned cur_action = 0; 747 IF_FEATURE_FIND_NOT( bool invert_flag = 0; ) 748 749 /* This is the only place in busybox where we use nested function. 750 * So far more standard alternatives were bigger. */ 751 /* Suppress a warning "func without a prototype" */ 752 auto action* alloc_action(int sizeof_struct, action_fp f); 753 action* alloc_action(int sizeof_struct, action_fp f) 754 { 755 action *ap; 756 appp[cur_group] = xrealloc(appp[cur_group], (cur_action+2) * sizeof(*appp)); 757 appp[cur_group][cur_action++] = ap = xmalloc(sizeof_struct); 758 appp[cur_group][cur_action] = NULL; 759 ap->f = f; 760 IF_FEATURE_FIND_NOT( ap->invert = invert_flag; ) 761 IF_FEATURE_FIND_NOT( invert_flag = 0; ) 762 return ap; 763 } 764 765#define ALLOC_ACTION(name) (action_##name*)alloc_action(sizeof(action_##name), (action_fp) func_##name) 766 767 appp = xzalloc(2 * sizeof(appp[0])); /* appp[0],[1] == NULL */ 768 769/* Actions have side effects and return a true or false value 770 * We implement: -print, -print0, -exec 771 * 772 * The rest are tests. 773 * 774 * Tests and actions are grouped by operators 775 * ( expr ) Force precedence 776 * ! expr True if expr is false 777 * -not expr Same as ! expr 778 * expr1 [-a[nd]] expr2 And; expr2 is not evaluated if expr1 is false 779 * expr1 -o[r] expr2 Or; expr2 is not evaluated if expr1 is true 780 * expr1 , expr2 List; both expr1 and expr2 are always evaluated 781 * We implement: (), -a, -o 782 */ 783 while (*argv) { 784 const char *arg = argv[0]; 785 int parm = index_in_strings(params, arg); 786 const char *arg1 = argv[1]; 787 788 if (parm >= PARM_name) { 789 /* All options starting from -name require argument */ 790 if (!arg1) 791 bb_error_msg_and_die(bb_msg_requires_arg, arg); 792 argv++; 793 } 794 795 /* We can use big switch() here, but on i386 796 * it doesn't give smaller code. Other arches? */ 797 798 /* --- Operators --- */ 799 if (parm == PARM_a IF_DESKTOP(|| parm == PARM_and)) { 800 /* no further special handling required */ 801 } 802 else if (parm == PARM_o IF_DESKTOP(|| parm == PARM_or)) { 803 /* start new OR group */ 804 cur_group++; 805 appp = xrealloc(appp, (cur_group+2) * sizeof(*appp)); 806 /*appp[cur_group] = NULL; - already NULL */ 807 appp[cur_group+1] = NULL; 808 cur_action = 0; 809 } 810#if ENABLE_FEATURE_FIND_NOT 811 else if (parm == PARM_char_not IF_DESKTOP(|| parm == PARM_not)) { 812 /* also handles "find ! ! -name 'foo*'" */ 813 invert_flag ^= 1; 814 } 815#endif 816 817 /* --- Tests and actions --- */ 818 else if (parm == PARM_print) { 819 G.need_print = 0; 820 /* GNU find ignores '!' here: "find ! -print" */ 821 IF_FEATURE_FIND_NOT( invert_flag = 0; ) 822 (void) ALLOC_ACTION(print); 823 } 824#if ENABLE_FEATURE_FIND_PRINT0 825 else if (parm == PARM_print0) { 826 G.need_print = 0; 827 IF_FEATURE_FIND_NOT( invert_flag = 0; ) 828 (void) ALLOC_ACTION(print0); 829 } 830#endif 831#if ENABLE_FEATURE_FIND_DEPTH 832 else if (parm == PARM_depth) { 833 G.recurse_flags |= ACTION_DEPTHFIRST; 834 } 835#endif 836#if ENABLE_FEATURE_FIND_PRUNE 837 else if (parm == PARM_prune) { 838 IF_FEATURE_FIND_NOT( invert_flag = 0; ) 839 (void) ALLOC_ACTION(prune); 840 } 841#endif 842#if ENABLE_FEATURE_FIND_DELETE 843 else if (parm == PARM_delete) { 844 G.need_print = 0; 845 G.recurse_flags |= ACTION_DEPTHFIRST; 846 (void) ALLOC_ACTION(delete); 847 } 848#endif 849#if ENABLE_FEATURE_FIND_EXEC 850 else if (parm == PARM_exec) { 851 int i; 852 action_exec *ap; 853 G.need_print = 0; 854 IF_FEATURE_FIND_NOT( invert_flag = 0; ) 855 ap = ALLOC_ACTION(exec); 856 ap->exec_argv = ++argv; /* first arg after -exec */ 857 ap->exec_argc = 0; 858 while (1) { 859 if (!*argv) /* did not see ';' or '+' until end */ 860 bb_error_msg_and_die(bb_msg_requires_arg, "-exec"); 861 if (LONE_CHAR(argv[0], ';')) 862 break; 863 //TODO: implement {} + (like xargs) 864 // See: 865 // find findutils/ -exec echo ">"{}"<" \; 866 // find findutils/ -exec echo ">"{}"<" + 867 argv++; 868 ap->exec_argc++; 869 } 870 if (ap->exec_argc == 0) 871 bb_error_msg_and_die(bb_msg_requires_arg, arg); 872 ap->subst_count = xmalloc(ap->exec_argc * sizeof(int)); 873 i = ap->exec_argc; 874 while (i--) 875 ap->subst_count[i] = count_subst(ap->exec_argv[i]); 876 } 877#endif 878#if ENABLE_FEATURE_FIND_PAREN 879 else if (parm == PARM_char_brace) { 880 action_paren *ap; 881 char **endarg; 882 unsigned nested = 1; 883 884 endarg = argv; 885 while (1) { 886 if (!*++endarg) 887 bb_error_msg_and_die("unpaired '('"); 888 if (LONE_CHAR(*endarg, '(')) 889 nested++; 890 else if (LONE_CHAR(*endarg, ')') && !--nested) { 891 *endarg = NULL; 892 break; 893 } 894 } 895 ap = ALLOC_ACTION(paren); 896 ap->subexpr = parse_params(argv + 1); 897 *endarg = (char*) ")"; /* restore NULLed parameter */ 898 argv = endarg; 899 } 900#endif 901 else if (parm == PARM_name || parm == PARM_iname) { 902 action_name *ap; 903 ap = ALLOC_ACTION(name); 904 ap->pattern = arg1; 905 ap->iname = (parm == PARM_iname); 906 } 907#if ENABLE_FEATURE_FIND_PATH 908 else if (parm == PARM_path) { 909 action_path *ap; 910 ap = ALLOC_ACTION(path); 911 ap->pattern = arg1; 912 } 913#endif 914#if ENABLE_FEATURE_FIND_REGEX 915 else if (parm == PARM_regex) { 916 action_regex *ap; 917 ap = ALLOC_ACTION(regex); 918 xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/); 919 } 920#endif 921#if ENABLE_FEATURE_FIND_TYPE 922 else if (parm == PARM_type) { 923 action_type *ap; 924 ap = ALLOC_ACTION(type); 925 ap->type_mask = find_type(arg1); 926 } 927#endif 928#if ENABLE_FEATURE_FIND_PERM 929/* -perm mode File's permission bits are exactly mode (octal or symbolic). 930 * Symbolic modes use mode 0 as a point of departure. 931 * -perm -mode All of the permission bits mode are set for the file. 932 * -perm +mode Any of the permission bits mode are set for the file. 933 */ 934 else if (parm == PARM_perm) { 935 action_perm *ap; 936 ap = ALLOC_ACTION(perm); 937 ap->perm_char = arg1[0]; 938 arg1 = plus_minus_num(arg1); 939 ap->perm_mask = 0; 940 if (!bb_parse_mode(arg1, &ap->perm_mask)) 941 bb_error_msg_and_die("invalid mode '%s'", arg1); 942 } 943#endif 944#if ENABLE_FEATURE_FIND_MTIME 945 else if (parm == PARM_mtime) { 946 action_mtime *ap; 947 ap = ALLOC_ACTION(mtime); 948 ap->mtime_char = arg1[0]; 949 ap->mtime_days = xatoul(plus_minus_num(arg1)); 950 } 951#endif 952#if ENABLE_FEATURE_FIND_MMIN 953 else if (parm == PARM_mmin) { 954 action_mmin *ap; 955 ap = ALLOC_ACTION(mmin); 956 ap->mmin_char = arg1[0]; 957 ap->mmin_mins = xatoul(plus_minus_num(arg1)); 958 } 959#endif 960#if ENABLE_FEATURE_FIND_NEWER 961 else if (parm == PARM_newer) { 962 struct stat stat_newer; 963 action_newer *ap; 964 ap = ALLOC_ACTION(newer); 965 xstat(arg1, &stat_newer); 966 ap->newer_mtime = stat_newer.st_mtime; 967 } 968#endif 969#if ENABLE_FEATURE_FIND_INUM 970 else if (parm == PARM_inum) { 971 action_inum *ap; 972 ap = ALLOC_ACTION(inum); 973 ap->inode_num = xatoul(arg1); 974 } 975#endif 976#if ENABLE_FEATURE_FIND_USER 977 else if (parm == PARM_user) { 978 action_user *ap; 979 ap = ALLOC_ACTION(user); 980 ap->uid = bb_strtou(arg1, NULL, 10); 981 if (errno) 982 ap->uid = xuname2uid(arg1); 983 } 984#endif 985#if ENABLE_FEATURE_FIND_GROUP 986 else if (parm == PARM_group) { 987 action_group *ap; 988 ap = ALLOC_ACTION(group); 989 ap->gid = bb_strtou(arg1, NULL, 10); 990 if (errno) 991 ap->gid = xgroup2gid(arg1); 992 } 993#endif 994#if ENABLE_FEATURE_FIND_SIZE 995 else if (parm == PARM_size) { 996/* -size n[bckw]: file uses n units of space 997 * b (default): units are 512-byte blocks 998 * c: 1 byte 999 * k: kilobytes 1000 * w: 2-byte words 1001 */ 1002#if ENABLE_LFS 1003#define XATOU_SFX xatoull_sfx 1004#else 1005#define XATOU_SFX xatoul_sfx 1006#endif 1007 static const struct suffix_mult find_suffixes[] = { 1008 { "c", 1 }, 1009 { "w", 2 }, 1010 { "", 512 }, 1011 { "b", 512 }, 1012 { "k", 1024 }, 1013 { "", 0 } 1014 }; 1015 action_size *ap; 1016 ap = ALLOC_ACTION(size); 1017 ap->size_char = arg1[0]; 1018 ap->size = XATOU_SFX(plus_minus_num(arg1), find_suffixes); 1019 } 1020#endif 1021#if ENABLE_FEATURE_FIND_CONTEXT 1022 else if (parm == PARM_context) { 1023 action_context *ap; 1024 ap = ALLOC_ACTION(context); 1025 ap->context = NULL; 1026 /* SELinux headers erroneously declare non-const parameter */ 1027 if (selinux_raw_to_trans_context((char*)arg1, &ap->context)) 1028 bb_simple_perror_msg(arg1); 1029 } 1030#endif 1031#if ENABLE_FEATURE_FIND_LINKS 1032 else if (parm == PARM_links) { 1033 action_links *ap; 1034 ap = ALLOC_ACTION(links); 1035 ap->links_char = arg1[0]; 1036 ap->links_count = xatoul(plus_minus_num(arg1)); 1037 } 1038#endif 1039 else { 1040 bb_error_msg("unrecognized: %s", arg); 1041 bb_show_usage(); 1042 } 1043 argv++; 1044 } 1045 return appp; 1046#undef ALLOC_ACTION 1047} 1048 1049//usage:#define find_trivial_usage 1050//usage: "[PATH]... [EXPRESSION]" 1051//usage:#define find_full_usage "\n\n" 1052//usage: "Search for files. The default PATH is the current directory,\n" 1053//usage: "default EXPRESSION is '-print'\n" 1054//usage: "\nEXPRESSION may consist of:" 1055//usage: "\n -follow Follow symlinks" 1056//usage: IF_FEATURE_FIND_XDEV( 1057//usage: "\n -xdev Don't descend directories on other filesystems" 1058//usage: ) 1059//usage: IF_FEATURE_FIND_MAXDEPTH( 1060//usage: "\n -maxdepth N Descend at most N levels. -maxdepth 0 applies" 1061//usage: "\n tests/actions to command line arguments only" 1062//usage: ) 1063//usage: "\n -mindepth N Don't act on first N levels" 1064//usage: "\n -name PATTERN File name (w/o directory name) matches PATTERN" 1065//usage: "\n -iname PATTERN Case insensitive -name" 1066//usage: IF_FEATURE_FIND_PATH( 1067//usage: "\n -path PATTERN Path matches PATTERN" 1068//usage: ) 1069//usage: IF_FEATURE_FIND_REGEX( 1070//usage: "\n -regex PATTERN Path matches regex PATTERN" 1071//usage: ) 1072//usage: IF_FEATURE_FIND_TYPE( 1073//usage: "\n -type X File type is X (X is one of: f,d,l,b,c,...)" 1074//usage: ) 1075//usage: IF_FEATURE_FIND_PERM( 1076//usage: "\n -perm NNN Permissions match any of (+NNN), all of (-NNN)," 1077//usage: "\n or exactly NNN" 1078//usage: ) 1079//usage: IF_FEATURE_FIND_MTIME( 1080//usage: "\n -mtime DAYS Modified time is greater than (+N), less than (-N)," 1081//usage: "\n or exactly N days" 1082//usage: ) 1083//usage: IF_FEATURE_FIND_MMIN( 1084//usage: "\n -mmin MINS Modified time is greater than (+N), less than (-N)," 1085//usage: "\n or exactly N minutes" 1086//usage: ) 1087//usage: IF_FEATURE_FIND_NEWER( 1088//usage: "\n -newer FILE Modified time is more recent than FILE's" 1089//usage: ) 1090//usage: IF_FEATURE_FIND_INUM( 1091//usage: "\n -inum N File has inode number N" 1092//usage: ) 1093//usage: IF_FEATURE_FIND_USER( 1094//usage: "\n -user NAME File is owned by user NAME (numeric user ID allowed)" 1095//usage: ) 1096//usage: IF_FEATURE_FIND_GROUP( 1097//usage: "\n -group NAME File belongs to group NAME (numeric group ID allowed)" 1098//usage: ) 1099//usage: IF_FEATURE_FIND_DEPTH( 1100//usage: "\n -depth Process directory name after traversing it" 1101//usage: ) 1102//usage: IF_FEATURE_FIND_SIZE( 1103//usage: "\n -size N[bck] File size is N (c:bytes,k:kbytes,b:512 bytes(def.))" 1104//usage: "\n +/-N: file size is bigger/smaller than N" 1105//usage: ) 1106//usage: IF_FEATURE_FIND_LINKS( 1107//usage: "\n -links N Number of links is greater than (+N), less than (-N)," 1108//usage: "\n or exactly N" 1109//usage: ) 1110//usage: "\n -print Print (default and assumed)" 1111//usage: IF_FEATURE_FIND_PRINT0( 1112//usage: "\n -print0 Delimit output with null characters rather than" 1113//usage: "\n newlines" 1114//usage: ) 1115//usage: IF_FEATURE_FIND_CONTEXT( 1116//usage: "\n -context File has specified security context" 1117//usage: ) 1118//usage: IF_FEATURE_FIND_EXEC( 1119//usage: "\n -exec CMD ARG ; Run CMD with all instances of {} replaced by the" 1120//usage: "\n matching files" 1121//usage: ) 1122//usage: IF_FEATURE_FIND_PRUNE( 1123//usage: "\n -prune Stop traversing current subtree" 1124//usage: ) 1125//usage: IF_FEATURE_FIND_DELETE( 1126//usage: "\n -delete Delete files, turns on -depth option" 1127//usage: ) 1128//usage: IF_FEATURE_FIND_PAREN( 1129//usage: "\n (EXPR) Group an expression" 1130//usage: ) 1131//usage: 1132//usage:#define find_example_usage 1133//usage: "$ find / -name passwd\n" 1134//usage: "/etc/passwd\n" 1135 1136int find_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 1137int find_main(int argc UNUSED_PARAM, char **argv) 1138{ 1139 static const char options[] ALIGN1 = 1140 "-follow\0" 1141IF_FEATURE_FIND_XDEV( "-xdev\0" ) 1142IF_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0") 1143 ; 1144 enum { 1145 OPT_FOLLOW, 1146IF_FEATURE_FIND_XDEV( OPT_XDEV ,) 1147IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,) 1148 }; 1149 1150 char *arg; 1151 char **argp; 1152 int i, firstopt, status = EXIT_SUCCESS; 1153#if ENABLE_FEATURE_FIND_MAXDEPTH 1154 int minmaxdepth[2] = { 0, INT_MAX }; 1155#else 1156#define minmaxdepth NULL 1157#endif 1158 1159 INIT_G(); 1160 1161 for (firstopt = 1; argv[firstopt]; firstopt++) { 1162 if (argv[firstopt][0] == '-') 1163 break; 1164 if (ENABLE_FEATURE_FIND_NOT && LONE_CHAR(argv[firstopt], '!')) 1165 break; 1166#if ENABLE_FEATURE_FIND_PAREN 1167 if (LONE_CHAR(argv[firstopt], '(')) 1168 break; 1169#endif 1170 } 1171 if (firstopt == 1) { 1172 argv[0] = (char*)"."; 1173 argv--; 1174 firstopt++; 1175 } 1176 1177/* All options always return true. They always take effect 1178 * rather than being processed only when their place in the 1179 * expression is reached. 1180 * We implement: -follow, -xdev, -maxdepth 1181 */ 1182 /* Process options, and replace then with -a */ 1183 /* (-a will be ignored by recursive parser later) */ 1184 argp = &argv[firstopt]; 1185 while ((arg = argp[0])) { 1186 int opt = index_in_strings(options, arg); 1187 if (opt == OPT_FOLLOW) { 1188 G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK; 1189 argp[0] = (char*)"-a"; 1190 } 1191#if ENABLE_FEATURE_FIND_XDEV 1192 if (opt == OPT_XDEV) { 1193 struct stat stbuf; 1194 if (!G.xdev_count) { 1195 G.xdev_count = firstopt - 1; 1196 G.xdev_dev = xzalloc(G.xdev_count * sizeof(G.xdev_dev[0])); 1197 for (i = 1; i < firstopt; i++) { 1198 /* not xstat(): shouldn't bomb out on 1199 * "find not_exist exist -xdev" */ 1200 if (stat(argv[i], &stbuf) == 0) 1201 G.xdev_dev[i-1] = stbuf.st_dev; 1202 /* else G.xdev_dev[i-1] stays 0 and 1203 * won't match any real device dev_t */ 1204 } 1205 } 1206 argp[0] = (char*)"-a"; 1207 } 1208#endif 1209#if ENABLE_FEATURE_FIND_MAXDEPTH 1210 if (opt == OPT_MINDEPTH || opt == OPT_MINDEPTH + 1) { 1211 if (!argp[1]) 1212 bb_show_usage(); 1213 minmaxdepth[opt - OPT_MINDEPTH] = xatoi_u(argp[1]); 1214 argp[0] = (char*)"-a"; 1215 argp[1] = (char*)"-a"; 1216 argp++; 1217 } 1218#endif 1219 argp++; 1220 } 1221 1222 G.actions = parse_params(&argv[firstopt]); 1223 1224 for (i = 1; i < firstopt; i++) { 1225 if (!recursive_action(argv[i], 1226 G.recurse_flags,/* flags */ 1227 fileAction, /* file action */ 1228 fileAction, /* dir action */ 1229#if ENABLE_FEATURE_FIND_MAXDEPTH 1230 minmaxdepth, /* user data */ 1231#else 1232 NULL, /* user data */ 1233#endif 1234 0)) /* depth */ 1235 status = EXIT_FAILURE; 1236 } 1237 return status; 1238} 1239