/* vi: set sw=4 ts=4: */ /* * Mini find implementation for busybox * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> * * Reworked by David Douthitt <n9ubh@callsign.net> and * Matt Kraai <kraai@alumni.carnegiemellon.edu>. * * Licensed under GPLv2, see file LICENSE in this source tree. */ /* findutils-4.1.20: * * # find file.txt -exec 'echo {}' '{} {}' ';' * find: echo file.txt: No such file or directory * # find file.txt -exec 'echo' '{} {}' '; ' * find: missing argument to `-exec' * # find file.txt -exec 'echo {}' '{} {}' ';' junk * find: paths must precede expression * # find file.txt -exec 'echo {}' '{} {}' ';' junk ';' * find: paths must precede expression * # find file.txt -exec 'echo' '{} {}' ';' * file.txt file.txt * (strace: execve("/bin/echo", ["echo", "file.txt file.txt"], [ 30 vars ])) * # find file.txt -exec 'echo' '{} {}' ';' -print -exec pwd ';' * file.txt file.txt * file.txt * /tmp * # find -name '*.c' -o -name '*.h' * [shows files, *.c and *.h intermixed] * # find file.txt -name '*f*' -o -name '*t*' * file.txt * # find file.txt -name '*z*' -o -name '*t*' * file.txt * # find file.txt -name '*f*' -o -name '*z*' * file.txt * * # find t z -name '*t*' -print -o -name '*z*' * t * # find t z t z -name '*t*' -o -name '*z*' -print * z * z * # find t z t z '(' -name '*t*' -o -name '*z*' ')' -o -print * (no output) */ /* Testing script * ./busybox find "$@" | tee /tmp/bb_find * echo ================== * /path/to/gnu/find "$@" | tee /tmp/std_find * echo ================== * diff -u /tmp/std_find /tmp/bb_find && echo Identical */ //applet:IF_FIND(APPLET_NOEXEC(find, find, _BB_DIR_USR_BIN, _BB_SUID_DROP, find)) //kbuild:lib-$(CONFIG_FIND) += find.o //config:config FIND //config: bool "find" //config: default y //config: help //config: find is used to search your system to find specified files. //config: //config:config FEATURE_FIND_PRINT0 //config: bool "Enable -print0: NUL-terminated output" //config: default y //config: depends on FIND //config: help //config: Causes output names to be separated by a NUL character //config: rather than a newline. This allows names that contain //config: newlines and other whitespace to be more easily //config: interpreted by other programs. //config: //config:config FEATURE_FIND_MTIME //config: bool "Enable -mtime: modified time matching" //config: default y //config: depends on FIND //config: help //config: Allow searching based on the modification time of //config: files, in days. //config: //config:config FEATURE_FIND_MMIN //config: bool "Enable -mmin: modified time matching by minutes" //config: default y //config: depends on FIND //config: help //config: Allow searching based on the modification time of //config: files, in minutes. //config: //config:config FEATURE_FIND_PERM //config: bool "Enable -perm: permissions matching" //config: default y //config: depends on FIND //config: help //config: Enable searching based on file permissions. //config: //config:config FEATURE_FIND_TYPE //config: bool "Enable -type: file type matching (file/dir/link/...)" //config: default y //config: depends on FIND //config: help //config: Enable searching based on file type (file, //config: directory, socket, device, etc.). //config: //config:config FEATURE_FIND_XDEV //config: bool "Enable -xdev: 'stay in filesystem'" //config: default y //config: depends on FIND //config: help //config: This option allows find to restrict searches to a single filesystem. //config: //config:config FEATURE_FIND_MAXDEPTH //config: bool "Enable -maxdepth N" //config: default y //config: depends on FIND //config: help //config: This option enables -maxdepth N option. //config: //config:config FEATURE_FIND_NEWER //config: bool "Enable -newer: compare file modification times" //config: default y //config: depends on FIND //config: help //config: Support the 'find -newer' option for finding any files which have //config: a modified time that is more recent than the specified FILE. //config: //config:config FEATURE_FIND_INUM //config: bool "Enable -inum: inode number matching" //config: default y //config: depends on FIND //config: help //config: Support the 'find -inum' option for searching by inode number. //config: //config:config FEATURE_FIND_EXEC //config: bool "Enable -exec: execute commands" //config: default y //config: depends on FIND //config: help //config: Support the 'find -exec' option for executing commands based upon //config: the files matched. //config: //config:config FEATURE_FIND_USER //config: bool "Enable -user: username/uid matching" //config: default y //config: depends on FIND //config: help //config: Support the 'find -user' option for searching by username or uid. //config: //config:config FEATURE_FIND_GROUP //config: bool "Enable -group: group/gid matching" //config: default y //config: depends on FIND //config: help //config: Support the 'find -group' option for searching by group name or gid. //config: //config:config FEATURE_FIND_NOT //config: bool "Enable the 'not' (!) operator" //config: default y //config: depends on FIND //config: help //config: Support the '!' operator to invert the test results. //config: If 'Enable full-blown desktop' is enabled, then will also support //config: the non-POSIX notation '-not'. //config: //config:config FEATURE_FIND_DEPTH //config: bool "Enable -depth" //config: default y //config: depends on FIND //config: help //config: Process each directory's contents before the directory itself. //config: //config:config FEATURE_FIND_PAREN //config: bool "Enable parens in options" //config: default y //config: depends on FIND //config: help //config: Enable usage of parens '(' to specify logical order of arguments. //config: //config:config FEATURE_FIND_SIZE //config: bool "Enable -size: file size matching" //config: default y //config: depends on FIND //config: help //config: Support the 'find -size' option for searching by file size. //config: //config:config FEATURE_FIND_PRUNE //config: bool "Enable -prune: exclude subdirectories" //config: default y //config: depends on FIND //config: help //config: If the file is a directory, dont descend into it. Useful for //config: exclusion .svn and CVS directories. //config: //config:config FEATURE_FIND_DELETE //config: bool "Enable -delete: delete files/dirs" //config: default y //config: depends on FIND && FEATURE_FIND_DEPTH //config: help //config: Support the 'find -delete' option for deleting files and directories. //config: WARNING: This option can do much harm if used wrong. Busybox will not //config: try to protect the user from doing stupid things. Use with care. //config: //config:config FEATURE_FIND_PATH //config: bool "Enable -path: match pathname with shell pattern" //config: default y //config: depends on FIND //config: help //config: The -path option matches whole pathname instead of just filename. //config: //config:config FEATURE_FIND_REGEX //config: bool "Enable -regex: match pathname with regex" //config: default y //config: depends on FIND //config: help //config: The -regex option matches whole pathname against regular expression. //config: //config:config FEATURE_FIND_CONTEXT //config: bool "Enable -context: security context matching" //config: default n //config: depends on FIND && SELINUX //config: help //config: Support the 'find -context' option for matching security context. //config: //config:config FEATURE_FIND_LINKS //config: bool "Enable -links: link count matching" //config: default y //config: depends on FIND //config: help //config: Support the 'find -links' option for matching number of links. #include <fnmatch.h> #include "libbb.h" #if ENABLE_FEATURE_FIND_REGEX #include "xregex.h" #endif /* This is a NOEXEC applet. Be very careful! */ typedef int (*action_fp)(const char *fileName, const struct stat *statbuf, void *) FAST_FUNC; typedef struct { action_fp f; #if ENABLE_FEATURE_FIND_NOT bool invert; #endif } action; #define ACTS(name, ...) typedef struct { action a; __VA_ARGS__ } action_##name; #define ACTF(name) \ static int FAST_FUNC func_##name(const char *fileName UNUSED_PARAM, \ const struct stat *statbuf UNUSED_PARAM, \ action_##name* ap UNUSED_PARAM) ACTS(print) ACTS(name, const char *pattern; bool iname;) IF_FEATURE_FIND_PATH( ACTS(path, const char *pattern;)) IF_FEATURE_FIND_REGEX( ACTS(regex, regex_t compiled_pattern;)) IF_FEATURE_FIND_PRINT0( ACTS(print0)) IF_FEATURE_FIND_TYPE( ACTS(type, int type_mask;)) IF_FEATURE_FIND_PERM( ACTS(perm, char perm_char; mode_t perm_mask;)) IF_FEATURE_FIND_MTIME( ACTS(mtime, char mtime_char; unsigned mtime_days;)) IF_FEATURE_FIND_MMIN( ACTS(mmin, char mmin_char; unsigned mmin_mins;)) IF_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;)) IF_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;)) IF_FEATURE_FIND_USER( ACTS(user, uid_t uid;)) IF_FEATURE_FIND_SIZE( ACTS(size, char size_char; off_t size;)) IF_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;)) IF_FEATURE_FIND_PAREN( ACTS(paren, action ***subexpr;)) IF_FEATURE_FIND_PRUNE( ACTS(prune)) IF_FEATURE_FIND_DELETE( ACTS(delete)) IF_FEATURE_FIND_EXEC( ACTS(exec, char **exec_argv; unsigned *subst_count; int exec_argc;)) IF_FEATURE_FIND_GROUP( ACTS(group, gid_t gid;)) IF_FEATURE_FIND_LINKS( ACTS(links, char links_char; int links_count;)) struct globals { IF_FEATURE_FIND_XDEV(dev_t *xdev_dev;) IF_FEATURE_FIND_XDEV(int xdev_count;) action ***actions; bool need_print; recurse_flags_t recurse_flags; } FIX_ALIASING; #define G (*(struct globals*)&bb_common_bufsiz1) #define INIT_G() do { \ struct G_sizecheck { \ char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \ }; \ /* we have to zero it out because of NOEXEC */ \ memset(&G, 0, offsetof(struct globals, need_print)); \ G.need_print = 1; \ G.recurse_flags = ACTION_RECURSE; \ } while (0) #if ENABLE_FEATURE_FIND_EXEC static unsigned count_subst(const char *str) { unsigned count = 0; while ((str = strstr(str, "{}")) != NULL) { count++; str++; } return count; } static char* subst(const char *src, unsigned count, const char* filename) { char *buf, *dst, *end; size_t flen = strlen(filename); /* we replace each '{}' with filename: growth by strlen-2 */ buf = dst = xmalloc(strlen(src) + count*(flen-2) + 1); while ((end = strstr(src, "{}"))) { memcpy(dst, src, end - src); dst += end - src; src = end + 2; memcpy(dst, filename, flen); dst += flen; } strcpy(dst, src); return buf; } #endif /* Return values of ACTFs ('action functions') are a bit mask: * bit 1=1: prune (use SKIP constant for setting it) * bit 0=1: matched successfully (TRUE) */ static int exec_actions(action ***appp, const char *fileName, const struct stat *statbuf) { int cur_group; int cur_action; int rc = 0; action **app, *ap; /* "action group" is a set of actions ANDed together. * groups are ORed together. * We simply evaluate each group until we find one in which all actions * succeed. */ /* -prune is special: if it is encountered, then we won't * descend into current directory. It doesn't matter whether * action group (in which -prune sits) will succeed or not: * find * -prune -name 'f*' -o -name 'm*' -- prunes every dir * find * -name 'f*' -o -prune -name 'm*' -- prunes all dirs * not starting with 'f' */ /* We invert TRUE bit (bit 0). Now 1 there means 'failure'. * and bitwise OR in "rc |= TRUE ^ ap->f()" will: * (1) make SKIP (-prune) bit stick; and (2) detect 'failure'. * On return, bit is restored. */ cur_group = -1; while ((app = appp[++cur_group]) != NULL) { rc &= ~TRUE; /* 'success' so far, clear TRUE bit */ cur_action = -1; while (1) { ap = app[++cur_action]; if (!ap) /* all actions in group were successful */ return rc ^ TRUE; /* restore TRUE bit */ rc |= TRUE ^ ap->f(fileName, statbuf, ap); #if ENABLE_FEATURE_FIND_NOT if (ap->invert) rc ^= TRUE; #endif if (rc & TRUE) /* current group failed, try next */ break; } } return rc ^ TRUE; /* restore TRUE bit */ } ACTF(name) { const char *tmp = bb_basename(fileName); if (tmp != fileName && *tmp == '\0') { /* "foo/bar/". Oh no... go back to 'b' */ tmp--; while (tmp != fileName && *--tmp != '/') continue; if (*tmp == '/') tmp++; } /* Was using FNM_PERIOD flag too, * but somewhere between 4.1.20 and 4.4.0 GNU find stopped using it. * find -name '*foo' should match .foo too: */ return fnmatch(ap->pattern, tmp, (ap->iname ? FNM_CASEFOLD : 0)) == 0; } #if ENABLE_FEATURE_FIND_PATH ACTF(path) { return fnmatch(ap->pattern, fileName, 0) == 0; } #endif #if ENABLE_FEATURE_FIND_REGEX ACTF(regex) { regmatch_t match; if (regexec(&ap->compiled_pattern, fileName, 1, &match, 0 /*eflags*/)) return 0; /* no match */ if (match.rm_so) return 0; /* match doesn't start at pos 0 */ if (fileName[match.rm_eo]) return 0; /* match doesn't end exactly at end of pathname */ return 1; } #endif #if ENABLE_FEATURE_FIND_TYPE ACTF(type) { return ((statbuf->st_mode & S_IFMT) == ap->type_mask); } #endif #if ENABLE_FEATURE_FIND_PERM ACTF(perm) { /* -perm +mode: at least one of perm_mask bits are set */ if (ap->perm_char == '+') return (statbuf->st_mode & ap->perm_mask) != 0; /* -perm -mode: all of perm_mask are set */ if (ap->perm_char == '-') return (statbuf->st_mode & ap->perm_mask) == ap->perm_mask; /* -perm mode: file mode must match perm_mask */ return (statbuf->st_mode & 07777) == ap->perm_mask; } #endif #if ENABLE_FEATURE_FIND_MTIME ACTF(mtime) { time_t file_age = time(NULL) - statbuf->st_mtime; time_t mtime_secs = ap->mtime_days * 24*60*60; if (ap->mtime_char == '+') return file_age >= mtime_secs + 24*60*60; if (ap->mtime_char == '-') return file_age < mtime_secs; /* just numeric mtime */ return file_age >= mtime_secs && file_age < (mtime_secs + 24*60*60); } #endif #if ENABLE_FEATURE_FIND_MMIN ACTF(mmin) { time_t file_age = time(NULL) - statbuf->st_mtime; time_t mmin_secs = ap->mmin_mins * 60; if (ap->mmin_char == '+') return file_age >= mmin_secs + 60; if (ap->mmin_char == '-') return file_age < mmin_secs; /* just numeric mmin */ return file_age >= mmin_secs && file_age < (mmin_secs + 60); } #endif #if ENABLE_FEATURE_FIND_NEWER ACTF(newer) { return (ap->newer_mtime < statbuf->st_mtime); } #endif #if ENABLE_FEATURE_FIND_INUM ACTF(inum) { return (statbuf->st_ino == ap->inode_num); } #endif #if ENABLE_FEATURE_FIND_EXEC ACTF(exec) { int i, rc; #if ENABLE_USE_PORTABLE_CODE char **argv = alloca(sizeof(char*) * (ap->exec_argc + 1)); #else /* gcc 4.3.1 generates smaller code: */ char *argv[ap->exec_argc + 1]; #endif for (i = 0; i < ap->exec_argc; i++) argv[i] = subst(ap->exec_argv[i], ap->subst_count[i], fileName); argv[i] = NULL; /* terminate the list */ rc = spawn_and_wait(argv); if (rc < 0) bb_simple_perror_msg(argv[0]); i = 0; while (argv[i]) free(argv[i++]); return rc == 0; /* return 1 if exitcode 0 */ } #endif #if ENABLE_FEATURE_FIND_USER ACTF(user) { return (statbuf->st_uid == ap->uid); } #endif #if ENABLE_FEATURE_FIND_GROUP ACTF(group) { return (statbuf->st_gid == ap->gid); } #endif #if ENABLE_FEATURE_FIND_PRINT0 ACTF(print0) { printf("%s%c", fileName, '\0'); return TRUE; } #endif ACTF(print) { puts(fileName); return TRUE; } #if ENABLE_FEATURE_FIND_PAREN ACTF(paren) { return exec_actions(ap->subexpr, fileName, statbuf); } #endif #if ENABLE_FEATURE_FIND_SIZE ACTF(size) { if (ap->size_char == '+') return statbuf->st_size > ap->size; if (ap->size_char == '-') return statbuf->st_size < ap->size; return statbuf->st_size == ap->size; } #endif #if ENABLE_FEATURE_FIND_PRUNE /* * -prune: if -depth is not given, return true and do not descend * current dir; if -depth is given, return false with no effect. * Example: * find dir -name 'asm-*' -prune -o -name '*.[chS]' -print */ ACTF(prune) { return SKIP + TRUE; } #endif #if ENABLE_FEATURE_FIND_DELETE ACTF(delete) { int rc; if (S_ISDIR(statbuf->st_mode)) { rc = rmdir(fileName); } else { rc = unlink(fileName); } if (rc < 0) bb_simple_perror_msg(fileName); return TRUE; } #endif #if ENABLE_FEATURE_FIND_CONTEXT ACTF(context) { security_context_t con; int rc; if (G.recurse_flags & ACTION_FOLLOWLINKS) { rc = getfilecon(fileName, &con); } else { rc = lgetfilecon(fileName, &con); } if (rc < 0) return FALSE; rc = strcmp(ap->context, con); freecon(con); return rc == 0; } #endif #if ENABLE_FEATURE_FIND_LINKS ACTF(links) { switch(ap->links_char) { case '-' : return (statbuf->st_nlink < ap->links_count); case '+' : return (statbuf->st_nlink > ap->links_count); default: return (statbuf->st_nlink == ap->links_count); } } #endif static int FAST_FUNC fileAction(const char *fileName, struct stat *statbuf, void *userData IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM), int depth IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM)) { int r; #if ENABLE_FEATURE_FIND_MAXDEPTH #define minmaxdepth ((int*)userData) if (depth < minmaxdepth[0]) return TRUE; /* skip this, continue recursing */ if (depth > minmaxdepth[1]) return SKIP; /* stop recursing */ #endif r = exec_actions(G.actions, fileName, statbuf); /* Had no explicit -print[0] or -exec? then print */ if ((r & TRUE) && G.need_print) puts(fileName); #if ENABLE_FEATURE_FIND_MAXDEPTH if (S_ISDIR(statbuf->st_mode)) { if (depth == minmaxdepth[1]) return SKIP; } #endif #if ENABLE_FEATURE_FIND_XDEV /* -xdev stops on mountpoints, but AFTER mountpoit itself * is processed as usual */ if (S_ISDIR(statbuf->st_mode)) { if (G.xdev_count) { int i; for (i = 0; i < G.xdev_count; i++) { if (G.xdev_dev[i] == statbuf->st_dev) goto found; } return SKIP; found: ; } } #endif /* Cannot return 0: our caller, recursive_action(), * will perror() and skip dirs (if called on dir) */ return (r & SKIP) ? SKIP : TRUE; #undef minmaxdepth } #if ENABLE_FEATURE_FIND_TYPE static int find_type(const char *type) { int mask = 0; if (*type == 'b') mask = S_IFBLK; else if (*type == 'c') mask = S_IFCHR; else if (*type == 'd') mask = S_IFDIR; else if (*type == 'p') mask = S_IFIFO; else if (*type == 'f') mask = S_IFREG; else if (*type == 'l') mask = S_IFLNK; else if (*type == 's') mask = S_IFSOCK; if (mask == 0 || type[1] != '\0') bb_error_msg_and_die(bb_msg_invalid_arg, type, "-type"); return mask; } #endif #if ENABLE_FEATURE_FIND_PERM \ || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \ || ENABLE_FEATURE_FIND_SIZE || ENABLE_FEATURE_FIND_LINKS static const char* plus_minus_num(const char* str) { if (*str == '-' || *str == '+') str++; return str; } #endif static action*** parse_params(char **argv) { enum { PARM_a , PARM_o , IF_FEATURE_FIND_NOT( PARM_char_not ,) #if ENABLE_DESKTOP PARM_and , PARM_or , IF_FEATURE_FIND_NOT( PARM_not ,) #endif PARM_print , IF_FEATURE_FIND_PRINT0( PARM_print0 ,) IF_FEATURE_FIND_DEPTH( PARM_depth ,) IF_FEATURE_FIND_PRUNE( PARM_prune ,) IF_FEATURE_FIND_DELETE( PARM_delete ,) IF_FEATURE_FIND_EXEC( PARM_exec ,) IF_FEATURE_FIND_PAREN( PARM_char_brace,) /* All options starting from here require argument */ PARM_name , PARM_iname , IF_FEATURE_FIND_PATH( PARM_path ,) IF_FEATURE_FIND_REGEX( PARM_regex ,) IF_FEATURE_FIND_TYPE( PARM_type ,) IF_FEATURE_FIND_PERM( PARM_perm ,) IF_FEATURE_FIND_MTIME( PARM_mtime ,) IF_FEATURE_FIND_MMIN( PARM_mmin ,) IF_FEATURE_FIND_NEWER( PARM_newer ,) IF_FEATURE_FIND_INUM( PARM_inum ,) IF_FEATURE_FIND_USER( PARM_user ,) IF_FEATURE_FIND_GROUP( PARM_group ,) IF_FEATURE_FIND_SIZE( PARM_size ,) IF_FEATURE_FIND_CONTEXT(PARM_context ,) IF_FEATURE_FIND_LINKS( PARM_links ,) }; static const char params[] ALIGN1 = "-a\0" "-o\0" IF_FEATURE_FIND_NOT( "!\0" ) #if ENABLE_DESKTOP "-and\0" "-or\0" IF_FEATURE_FIND_NOT( "-not\0" ) #endif "-print\0" IF_FEATURE_FIND_PRINT0( "-print0\0" ) IF_FEATURE_FIND_DEPTH( "-depth\0" ) IF_FEATURE_FIND_PRUNE( "-prune\0" ) IF_FEATURE_FIND_DELETE( "-delete\0" ) IF_FEATURE_FIND_EXEC( "-exec\0" ) IF_FEATURE_FIND_PAREN( "(\0" ) /* All options starting from here require argument */ "-name\0" "-iname\0" IF_FEATURE_FIND_PATH( "-path\0" ) IF_FEATURE_FIND_REGEX( "-regex\0" ) IF_FEATURE_FIND_TYPE( "-type\0" ) IF_FEATURE_FIND_PERM( "-perm\0" ) IF_FEATURE_FIND_MTIME( "-mtime\0" ) IF_FEATURE_FIND_MMIN( "-mmin\0" ) IF_FEATURE_FIND_NEWER( "-newer\0" ) IF_FEATURE_FIND_INUM( "-inum\0" ) IF_FEATURE_FIND_USER( "-user\0" ) IF_FEATURE_FIND_GROUP( "-group\0" ) IF_FEATURE_FIND_SIZE( "-size\0" ) IF_FEATURE_FIND_CONTEXT("-context\0") IF_FEATURE_FIND_LINKS( "-links\0" ) ; action*** appp; unsigned cur_group = 0; unsigned cur_action = 0; IF_FEATURE_FIND_NOT( bool invert_flag = 0; ) /* This is the only place in busybox where we use nested function. * So far more standard alternatives were bigger. */ /* Auto decl suppresses "func without a prototype" warning: */ auto action* alloc_action(int sizeof_struct, action_fp f); action* alloc_action(int sizeof_struct, action_fp f) { action *ap; appp[cur_group] = xrealloc(appp[cur_group], (cur_action+2) * sizeof(*appp)); appp[cur_group][cur_action++] = ap = xzalloc(sizeof_struct); appp[cur_group][cur_action] = NULL; ap->f = f; IF_FEATURE_FIND_NOT( ap->invert = invert_flag; ) IF_FEATURE_FIND_NOT( invert_flag = 0; ) return ap; } #define ALLOC_ACTION(name) (action_##name*)alloc_action(sizeof(action_##name), (action_fp) func_##name) appp = xzalloc(2 * sizeof(appp[0])); /* appp[0],[1] == NULL */ /* Actions have side effects and return a true or false value * We implement: -print, -print0, -exec * * The rest are tests. * * Tests and actions are grouped by operators * ( expr ) Force precedence * ! expr True if expr is false * -not expr Same as ! expr * expr1 [-a[nd]] expr2 And; expr2 is not evaluated if expr1 is false * expr1 -o[r] expr2 Or; expr2 is not evaluated if expr1 is true * expr1 , expr2 List; both expr1 and expr2 are always evaluated * We implement: (), -a, -o */ while (*argv) { const char *arg = argv[0]; int parm = index_in_strings(params, arg); const char *arg1 = argv[1]; if (parm >= PARM_name) { /* All options starting from -name require argument */ if (!arg1) bb_error_msg_and_die(bb_msg_requires_arg, arg); argv++; } /* We can use big switch() here, but on i386 * it doesn't give smaller code. Other arches? */ /* --- Operators --- */ if (parm == PARM_a IF_DESKTOP(|| parm == PARM_and)) { /* no further special handling required */ } else if (parm == PARM_o IF_DESKTOP(|| parm == PARM_or)) { /* start new OR group */ cur_group++; appp = xrealloc(appp, (cur_group+2) * sizeof(*appp)); /*appp[cur_group] = NULL; - already NULL */ appp[cur_group+1] = NULL; cur_action = 0; } #if ENABLE_FEATURE_FIND_NOT else if (parm == PARM_char_not IF_DESKTOP(|| parm == PARM_not)) { /* also handles "find ! ! -name 'foo*'" */ invert_flag ^= 1; } #endif /* --- Tests and actions --- */ else if (parm == PARM_print) { G.need_print = 0; /* GNU find ignores '!' here: "find ! -print" */ IF_FEATURE_FIND_NOT( invert_flag = 0; ) (void) ALLOC_ACTION(print); } #if ENABLE_FEATURE_FIND_PRINT0 else if (parm == PARM_print0) { G.need_print = 0; IF_FEATURE_FIND_NOT( invert_flag = 0; ) (void) ALLOC_ACTION(print0); } #endif #if ENABLE_FEATURE_FIND_DEPTH else if (parm == PARM_depth) { G.recurse_flags |= ACTION_DEPTHFIRST; } #endif #if ENABLE_FEATURE_FIND_PRUNE else if (parm == PARM_prune) { IF_FEATURE_FIND_NOT( invert_flag = 0; ) (void) ALLOC_ACTION(prune); } #endif #if ENABLE_FEATURE_FIND_DELETE else if (parm == PARM_delete) { G.need_print = 0; G.recurse_flags |= ACTION_DEPTHFIRST; (void) ALLOC_ACTION(delete); } #endif #if ENABLE_FEATURE_FIND_EXEC else if (parm == PARM_exec) { int i; action_exec *ap; G.need_print = 0; IF_FEATURE_FIND_NOT( invert_flag = 0; ) ap = ALLOC_ACTION(exec); ap->exec_argv = ++argv; /* first arg after -exec */ /*ap->exec_argc = 0; - ALLOC_ACTION did it */ while (1) { if (!*argv) /* did not see ';' or '+' until end */ bb_error_msg_and_die(bb_msg_requires_arg, "-exec"); // find -exec echo Foo ">{}<" ";" // executes "echo Foo <filename>", // find -exec echo Foo ">{}<" "+" // executes "echo Foo <filename1> <filename2> <filename3>...". // TODO (so far we treat "+" just like ";") if ((argv[0][0] == ';' || argv[0][0] == '+') && argv[0][1] == '\0' ) { break; } argv++; ap->exec_argc++; } if (ap->exec_argc == 0) bb_error_msg_and_die(bb_msg_requires_arg, arg); ap->subst_count = xmalloc(ap->exec_argc * sizeof(int)); i = ap->exec_argc; while (i--) ap->subst_count[i] = count_subst(ap->exec_argv[i]); } #endif #if ENABLE_FEATURE_FIND_PAREN else if (parm == PARM_char_brace) { action_paren *ap; char **endarg; unsigned nested = 1; endarg = argv; while (1) { if (!*++endarg) bb_error_msg_and_die("unpaired '('"); if (LONE_CHAR(*endarg, '(')) nested++; else if (LONE_CHAR(*endarg, ')') && !--nested) { *endarg = NULL; break; } } ap = ALLOC_ACTION(paren); ap->subexpr = parse_params(argv + 1); *endarg = (char*) ")"; /* restore NULLed parameter */ argv = endarg; } #endif else if (parm == PARM_name || parm == PARM_iname) { action_name *ap; ap = ALLOC_ACTION(name); ap->pattern = arg1; ap->iname = (parm == PARM_iname); } #if ENABLE_FEATURE_FIND_PATH else if (parm == PARM_path) { action_path *ap; ap = ALLOC_ACTION(path); ap->pattern = arg1; } #endif #if ENABLE_FEATURE_FIND_REGEX else if (parm == PARM_regex) { action_regex *ap; ap = ALLOC_ACTION(regex); xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/); } #endif #if ENABLE_FEATURE_FIND_TYPE else if (parm == PARM_type) { action_type *ap; ap = ALLOC_ACTION(type); ap->type_mask = find_type(arg1); } #endif #if ENABLE_FEATURE_FIND_PERM /* -perm mode File's permission bits are exactly mode (octal or symbolic). * Symbolic modes use mode 0 as a point of departure. * -perm -mode All of the permission bits mode are set for the file. * -perm +mode Any of the permission bits mode are set for the file. */ else if (parm == PARM_perm) { action_perm *ap; ap = ALLOC_ACTION(perm); ap->perm_char = arg1[0]; arg1 = plus_minus_num(arg1); /*ap->perm_mask = 0; - ALLOC_ACTION did it */ if (!bb_parse_mode(arg1, &ap->perm_mask)) bb_error_msg_and_die("invalid mode '%s'", arg1); } #endif #if ENABLE_FEATURE_FIND_MTIME else if (parm == PARM_mtime) { action_mtime *ap; ap = ALLOC_ACTION(mtime); ap->mtime_char = arg1[0]; ap->mtime_days = xatoul(plus_minus_num(arg1)); } #endif #if ENABLE_FEATURE_FIND_MMIN else if (parm == PARM_mmin) { action_mmin *ap; ap = ALLOC_ACTION(mmin); ap->mmin_char = arg1[0]; ap->mmin_mins = xatoul(plus_minus_num(arg1)); } #endif #if ENABLE_FEATURE_FIND_NEWER else if (parm == PARM_newer) { struct stat stat_newer; action_newer *ap; ap = ALLOC_ACTION(newer); xstat(arg1, &stat_newer); ap->newer_mtime = stat_newer.st_mtime; } #endif #if ENABLE_FEATURE_FIND_INUM else if (parm == PARM_inum) { action_inum *ap; ap = ALLOC_ACTION(inum); ap->inode_num = xatoul(arg1); } #endif #if ENABLE_FEATURE_FIND_USER else if (parm == PARM_user) { action_user *ap; ap = ALLOC_ACTION(user); ap->uid = bb_strtou(arg1, NULL, 10); if (errno) ap->uid = xuname2uid(arg1); } #endif #if ENABLE_FEATURE_FIND_GROUP else if (parm == PARM_group) { action_group *ap; ap = ALLOC_ACTION(group); ap->gid = bb_strtou(arg1, NULL, 10); if (errno) ap->gid = xgroup2gid(arg1); } #endif #if ENABLE_FEATURE_FIND_SIZE else if (parm == PARM_size) { /* -size n[bckw]: file uses n units of space * b (default): units are 512-byte blocks * c: 1 byte * k: kilobytes * w: 2-byte words */ #if ENABLE_LFS #define XATOU_SFX xatoull_sfx #else #define XATOU_SFX xatoul_sfx #endif static const struct suffix_mult find_suffixes[] = { { "c", 1 }, { "w", 2 }, { "", 512 }, { "b", 512 }, { "k", 1024 }, { "", 0 } }; action_size *ap; ap = ALLOC_ACTION(size); ap->size_char = arg1[0]; ap->size = XATOU_SFX(plus_minus_num(arg1), find_suffixes); } #endif #if ENABLE_FEATURE_FIND_CONTEXT else if (parm == PARM_context) { action_context *ap; ap = ALLOC_ACTION(context); /*ap->context = NULL; - ALLOC_ACTION did it */ /* SELinux headers erroneously declare non-const parameter */ if (selinux_raw_to_trans_context((char*)arg1, &ap->context)) bb_simple_perror_msg(arg1); } #endif #if ENABLE_FEATURE_FIND_LINKS else if (parm == PARM_links) { action_links *ap; ap = ALLOC_ACTION(links); ap->links_char = arg1[0]; ap->links_count = xatoul(plus_minus_num(arg1)); } #endif else { bb_error_msg("unrecognized: %s", arg); bb_show_usage(); } argv++; } return appp; #undef ALLOC_ACTION } //usage:#define find_trivial_usage //usage: "[PATH]... [EXPRESSION]" //usage:#define find_full_usage "\n\n" //usage: "Search for files. The default PATH is the current directory,\n" //usage: "default EXPRESSION is '-print'\n" //usage: "\nEXPRESSION may consist of:" //usage: "\n -follow Follow symlinks" //usage: IF_FEATURE_FIND_XDEV( //usage: "\n -xdev Don't descend directories on other filesystems" //usage: ) //usage: IF_FEATURE_FIND_MAXDEPTH( //usage: "\n -maxdepth N Descend at most N levels. -maxdepth 0 applies" //usage: "\n tests/actions to command line arguments only" //usage: ) //usage: "\n -mindepth N Don't act on first N levels" //usage: "\n -name PATTERN File name (w/o directory name) matches PATTERN" //usage: "\n -iname PATTERN Case insensitive -name" //usage: IF_FEATURE_FIND_PATH( //usage: "\n -path PATTERN Path matches PATTERN" //usage: ) //usage: IF_FEATURE_FIND_REGEX( //usage: "\n -regex PATTERN Path matches regex PATTERN" //usage: ) //usage: IF_FEATURE_FIND_TYPE( //usage: "\n -type X File type is X (X is one of: f,d,l,b,c,...)" //usage: ) //usage: IF_FEATURE_FIND_PERM( //usage: "\n -perm NNN Permissions match any of (+NNN), all of (-NNN)," //usage: "\n or exactly NNN" //usage: ) //usage: IF_FEATURE_FIND_MTIME( //usage: "\n -mtime DAYS Modified time is greater than (+N), less than (-N)," //usage: "\n or exactly N days" //usage: ) //usage: IF_FEATURE_FIND_MMIN( //usage: "\n -mmin MINS Modified time is greater than (+N), less than (-N)," //usage: "\n or exactly N minutes" //usage: ) //usage: IF_FEATURE_FIND_NEWER( //usage: "\n -newer FILE Modified time is more recent than FILE's" //usage: ) //usage: IF_FEATURE_FIND_INUM( //usage: "\n -inum N File has inode number N" //usage: ) //usage: IF_FEATURE_FIND_USER( //usage: "\n -user NAME File is owned by user NAME (numeric user ID allowed)" //usage: ) //usage: IF_FEATURE_FIND_GROUP( //usage: "\n -group NAME File belongs to group NAME (numeric group ID allowed)" //usage: ) //usage: IF_FEATURE_FIND_DEPTH( //usage: "\n -depth Process directory name after traversing it" //usage: ) //usage: IF_FEATURE_FIND_SIZE( //usage: "\n -size N[bck] File size is N (c:bytes,k:kbytes,b:512 bytes(def.))" //usage: "\n +/-N: file size is bigger/smaller than N" //usage: ) //usage: IF_FEATURE_FIND_LINKS( //usage: "\n -links N Number of links is greater than (+N), less than (-N)," //usage: "\n or exactly N" //usage: ) //usage: "\n -print Print (default and assumed)" //usage: IF_FEATURE_FIND_PRINT0( //usage: "\n -print0 Delimit output with null characters rather than" //usage: "\n newlines" //usage: ) //usage: IF_FEATURE_FIND_CONTEXT( //usage: "\n -context File has specified security context" //usage: ) //usage: IF_FEATURE_FIND_EXEC( //usage: "\n -exec CMD ARG ; Run CMD with all instances of {} replaced by the" //usage: "\n matching files" //usage: ) //usage: IF_FEATURE_FIND_PRUNE( //usage: "\n -prune Stop traversing current subtree" //usage: ) //usage: IF_FEATURE_FIND_DELETE( //usage: "\n -delete Delete files, turns on -depth option" //usage: ) //usage: IF_FEATURE_FIND_PAREN( //usage: "\n (EXPR) Group an expression" //usage: ) //usage: //usage:#define find_example_usage //usage: "$ find / -name passwd\n" //usage: "/etc/passwd\n" int find_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int find_main(int argc UNUSED_PARAM, char **argv) { static const char options[] ALIGN1 = "-follow\0" IF_FEATURE_FIND_XDEV( "-xdev\0" ) IF_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0") ; enum { OPT_FOLLOW, IF_FEATURE_FIND_XDEV( OPT_XDEV ,) IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,) }; char *arg; char **argp; int i, firstopt, status = EXIT_SUCCESS; #if ENABLE_FEATURE_FIND_MAXDEPTH int minmaxdepth[2] = { 0, INT_MAX }; #else #define minmaxdepth NULL #endif INIT_G(); for (firstopt = 1; argv[firstopt]; firstopt++) { if (argv[firstopt][0] == '-') break; if (ENABLE_FEATURE_FIND_NOT && LONE_CHAR(argv[firstopt], '!')) break; #if ENABLE_FEATURE_FIND_PAREN if (LONE_CHAR(argv[firstopt], '(')) break; #endif } if (firstopt == 1) { argv[0] = (char*)"."; argv--; firstopt++; } /* All options always return true. They always take effect * rather than being processed only when their place in the * expression is reached. * We implement: -follow, -xdev, -maxdepth */ /* Process options, and replace then with -a */ /* (-a will be ignored by recursive parser later) */ argp = &argv[firstopt]; while ((arg = argp[0])) { int opt = index_in_strings(options, arg); if (opt == OPT_FOLLOW) { G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK; argp[0] = (char*)"-a"; } #if ENABLE_FEATURE_FIND_XDEV if (opt == OPT_XDEV) { struct stat stbuf; if (!G.xdev_count) { G.xdev_count = firstopt - 1; G.xdev_dev = xzalloc(G.xdev_count * sizeof(G.xdev_dev[0])); for (i = 1; i < firstopt; i++) { /* not xstat(): shouldn't bomb out on * "find not_exist exist -xdev" */ if (stat(argv[i], &stbuf) == 0) G.xdev_dev[i-1] = stbuf.st_dev; /* else G.xdev_dev[i-1] stays 0 and * won't match any real device dev_t */ } } argp[0] = (char*)"-a"; } #endif #if ENABLE_FEATURE_FIND_MAXDEPTH if (opt == OPT_MINDEPTH || opt == OPT_MINDEPTH + 1) { if (!argp[1]) bb_show_usage(); minmaxdepth[opt - OPT_MINDEPTH] = xatoi_positive(argp[1]); argp[0] = (char*)"-a"; argp[1] = (char*)"-a"; argp++; } #endif argp++; } G.actions = parse_params(&argv[firstopt]); for (i = 1; i < firstopt; i++) { if (!recursive_action(argv[i], G.recurse_flags,/* flags */ fileAction, /* file action */ fileAction, /* dir action */ #if ENABLE_FEATURE_FIND_MAXDEPTH minmaxdepth, /* user data */ #else NULL, /* user data */ #endif 0)) /* depth */ status = EXIT_FAILURE; } return status; }