| /* 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 the GPL version 2, see the file LICENSE in this tarball. |
| */ |
| |
| /* 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 |
| */ |
| |
| //kbuild:lib-$(CONFIG_FIND) += find.o |
| //config: |
| //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. */ |
| /* Suppress a warning "func without a prototype" */ |
| 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 = xmalloc(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; |
| while (1) { |
| if (!*argv) /* did not see ';' or '+' until end */ |
| bb_error_msg_and_die(bb_msg_requires_arg, "-exec"); |
| if (LONE_CHAR(argv[0], ';')) |
| break; |
| //TODO: implement {} + (like xargs) |
| // See: |
| // find findutils/ -exec echo ">"{}"<" \; |
| // find findutils/ -exec echo ">"{}"<" + |
| 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; |
| 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; |
| /* 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 |
| } |
| |
| |
| 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_u(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; |
| } |