diff options
Diffstat (limited to 'release/src/router/busybox/findutils/find.c')
| -rw-r--r-- | release/src/router/busybox/findutils/find.c | 1056 |
1 files changed, 843 insertions, 213 deletions
diff --git a/release/src/router/busybox/findutils/find.c b/release/src/router/busybox/findutils/find.c index 66103046..df632f21 100644 --- a/release/src/router/busybox/findutils/find.c +++ b/release/src/router/busybox/findutils/find.c @@ -2,279 +2,909 @@ /* * Mini find implementation for busybox * - * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org> + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> * * Reworked by David Douthitt <n9ubh@callsign.net> and * Matt Kraai <kraai@alumni.carnegiemellon.edu>. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. + * Licensed under the GPL version 2, see the file LICENSE in this tarball. + */ + +/* findutils-4.1.20: * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * # 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 */ -#include <stdio.h> -#include <unistd.h> -#include <dirent.h> -#include <string.h> -#include <stdlib.h> #include <fnmatch.h> -#include <time.h> -#include <ctype.h> -#include "busybox.h" +#include "libbb.h" +#if ENABLE_FEATURE_FIND_REGEX +#include "xregex.h" +#endif -//XXX just found out about libbb/messages.c . maybe move stuff there ? - ghoz -const char msg_req_arg[] = "option `%s' requires an argument"; -const char msg_invalid_arg[] = "invalid argument `%s' to `%s'"; +/* This is a NOEXEC applet. Be very careful! */ -static char *pattern; -#ifdef CONFIG_FEATURE_FIND_TYPE -static int type_mask = 0; -#endif +USE_FEATURE_FIND_XDEV(static dev_t *xdev_dev;) +USE_FEATURE_FIND_XDEV(static int xdev_count;) -#ifdef CONFIG_FEATURE_FIND_PERM -static char perm_char = 0; -static int perm_mask = 0; -#endif +typedef int (*action_fp)(const char *fileName, struct stat *statbuf, void *); -#ifdef CONFIG_FEATURE_FIND_MTIME -static char mtime_char; -static int mtime_days; +typedef struct { + action_fp f; +#if ENABLE_FEATURE_FIND_NOT + bool invert; #endif +} action; +#define ACTS(name, arg...) typedef struct { action a; arg; } action_##name; +#define ACTF(name) static int func_##name(const char *fileName UNUSED_PARAM, \ + struct stat *statbuf UNUSED_PARAM, \ + action_##name* ap UNUSED_PARAM) + ACTS(print) + ACTS(name, const char *pattern; bool iname;) +USE_FEATURE_FIND_PATH( ACTS(path, const char *pattern;)) +USE_FEATURE_FIND_REGEX( ACTS(regex, regex_t compiled_pattern;)) +USE_FEATURE_FIND_PRINT0( ACTS(print0)) +USE_FEATURE_FIND_TYPE( ACTS(type, int type_mask;)) +USE_FEATURE_FIND_PERM( ACTS(perm, char perm_char; mode_t perm_mask;)) +USE_FEATURE_FIND_MTIME( ACTS(mtime, char mtime_char; unsigned mtime_days;)) +USE_FEATURE_FIND_MMIN( ACTS(mmin, char mmin_char; unsigned mmin_mins;)) +USE_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;)) +USE_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;)) +USE_FEATURE_FIND_USER( ACTS(user, uid_t uid;)) +USE_FEATURE_FIND_SIZE( ACTS(size, char size_char; off_t size;)) +USE_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;)) +USE_FEATURE_FIND_PAREN( ACTS(paren, action ***subexpr;)) +USE_FEATURE_FIND_PRUNE( ACTS(prune)) +USE_FEATURE_FIND_DELETE( ACTS(delete)) +USE_FEATURE_FIND_EXEC( ACTS(exec, char **exec_argv; unsigned *subst_count; int exec_argc;)) +USE_FEATURE_FIND_GROUP( ACTS(group, gid_t gid;)) -#ifdef CONFIG_FEATURE_FIND_XDEV -static dev_t *xdev_dev; -static int xdev_count = 0; -#endif +static action ***actions; +static bool need_print = 1; +static int recurse_flags = ACTION_RECURSE; + +#if ENABLE_FEATURE_FIND_EXEC +static unsigned count_subst(const char *str) +{ + unsigned count = 0; + while ((str = strstr(str, "{}")) != NULL) { + count++; + str++; + } + return count; +} -#ifdef CONFIG_FEATURE_FIND_NEWER -time_t newer_mtime; -#endif -#ifdef CONFIG_FEATURE_FIND_INUM -static ino_t inode_num; +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 -static int fileAction(const char *fileName, struct stat *statbuf, void* junk) +/* 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, struct stat *statbuf) { - if (pattern != NULL) { - const char *tmp = strrchr(fileName, '/'); + int cur_group; + int cur_action; + int rc = 0; + action **app, *ap; - if (tmp == NULL) - tmp = fileName; - else - tmp++; - if (!(fnmatch(pattern, tmp, FNM_PERIOD) == 0)) - goto no_match; + /* "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])) { + 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; + } } -#ifdef CONFIG_FEATURE_FIND_TYPE - if (type_mask != 0) { - if (!((statbuf->st_mode & S_IFMT) == type_mask)) - goto no_match; + return rc ^ TRUE; /* restore TRUE bit */ +} + + +ACTF(name) +{ + const char *tmp = bb_basename(fileName); + if (tmp != fileName && !*tmp) { /* "foo/bar/". Oh no... go back to 'b' */ + tmp--; + while (tmp != fileName && *--tmp != '/') + continue; + if (*tmp == '/') + tmp++; } + return fnmatch(ap->pattern, tmp, FNM_PERIOD | (ap->iname ? FNM_CASEFOLD : 0)) == 0; +} + +#if ENABLE_FEATURE_FIND_PATH +ACTF(path) +{ + return fnmatch(ap->pattern, fileName, 0) == 0; +} #endif -#ifdef CONFIG_FEATURE_FIND_PERM - if (perm_mask != 0) { - if (!((isdigit(perm_char) && (statbuf->st_mode & 07777) == perm_mask) || - (perm_char == '-' && (statbuf->st_mode & perm_mask) == perm_mask) || - (perm_char == '+' && (statbuf->st_mode & perm_mask) != 0))) - goto no_match; - } +#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 -#ifdef CONFIG_FEATURE_FIND_MTIME - if (mtime_char != 0) { - time_t file_age = time(NULL) - statbuf->st_mtime; - time_t mtime_secs = mtime_days * 24 * 60 * 60; - if (!((isdigit(mtime_char) && file_age >= mtime_secs && - file_age < mtime_secs + 24 * 60 * 60) || - (mtime_char == '+' && file_age >= mtime_secs + 24 * 60 * 60) || - (mtime_char == '-' && file_age < mtime_secs))) - goto no_match; - } +#if ENABLE_FEATURE_FIND_TYPE +ACTF(type) +{ + return ((statbuf->st_mode & S_IFMT) == ap->type_mask); +} #endif -#ifdef CONFIG_FEATURE_FIND_XDEV - if (xdev_count) { - int i; - for (i=0; i<xdev_count; i++) { - if (xdev_dev[i] == statbuf-> st_dev) - break; - } - if (i == xdev_count) { - if(S_ISDIR(statbuf->st_mode)) - return SKIP; - else - goto no_match; - } +#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; + char *argv[ap->exec_argc + 1]; + 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 -#ifdef CONFIG_FEATURE_FIND_NEWER - if (newer_mtime != 0) { - time_t file_age = newer_mtime - statbuf->st_mtime; - if (file_age >= 0) - goto no_match; +#if ENABLE_FEATURE_FIND_CONTEXT +ACTF(context) +{ + security_context_t con; + int rc; + + if (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 -#ifdef CONFIG_FEATURE_FIND_INUM - if (inode_num != 0) { - if (!(statbuf->st_ino == inode_num)) - goto no_match; + + +static int FAST_FUNC fileAction(const char *fileName, + struct stat *statbuf, + void *userData SKIP_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM), + int depth SKIP_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM)) +{ + int i; +#if ENABLE_FEATURE_FIND_MAXDEPTH +#define minmaxdepth ((int*)userData) + + if (depth < minmaxdepth[0]) return TRUE; + if (depth > minmaxdepth[1]) return SKIP; +#undef minmaxdepth +#endif + +#if ENABLE_FEATURE_FIND_XDEV + if (S_ISDIR(statbuf->st_mode) && xdev_count) { + for (i = 0; i < xdev_count; i++) { + if (xdev_dev[i] == statbuf->st_dev) + break; + } + if (i == xdev_count) + return SKIP; } #endif - puts(fileName); -no_match: - return (TRUE); + i = exec_actions(actions, fileName, statbuf); + /* Had no explicit -print[0] or -exec? then print */ + if ((i & TRUE) && need_print) + puts(fileName); + /* Cannot return 0: our caller, recursive_action(), + * will perror() and skip dirs (if called on dir) */ + return (i & SKIP) ? SKIP : TRUE; } -#ifdef CONFIG_FEATURE_FIND_TYPE -static int find_type(char *type) + +#if ENABLE_FEATURE_FIND_TYPE +static int find_type(const char *type) { int mask = 0; - switch (type[0]) { - case 'b': - mask = S_IFBLK; - break; - case 'c': - mask = S_IFCHR; - break; - case 'd': - mask = S_IFDIR; - break; - case 'p': - mask = S_IFIFO; - break; - case 'f': - mask = S_IFREG; - break; - case 'l': - mask = S_IFLNK; - break; - case 's': - mask = S_IFSOCK; - break; - } + 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(msg_invalid_arg, type, "-type"); + if (mask == 0 || *(type + 1) != '\0') + bb_error_msg_and_die(bb_msg_invalid_arg, type, "-type"); return mask; } #endif -int find_main(int argc, char **argv) +#if ENABLE_FEATURE_FIND_PERM \ + || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \ + || ENABLE_FEATURE_FIND_SIZE +static const char* plus_minus_num(const char* str) { - int dereference = FALSE; - int i, firstopt, status = EXIT_SUCCESS; + if (*str == '-' || *str == '+') + str++; + return str; +} +#endif - for (firstopt = 1; firstopt < argc; firstopt++) { - if (argv[firstopt][0] == '-') - break; +static action*** parse_params(char **argv) +{ + enum { + PARM_a , + PARM_o , + USE_FEATURE_FIND_NOT( PARM_char_not ,) +#if ENABLE_DESKTOP + PARM_and , + PARM_or , + USE_FEATURE_FIND_NOT( PARM_not ,) +#endif + PARM_print , + USE_FEATURE_FIND_PRINT0( PARM_print0 ,) + USE_FEATURE_FIND_DEPTH( PARM_depth ,) + USE_FEATURE_FIND_PRUNE( PARM_prune ,) + USE_FEATURE_FIND_DELETE( PARM_delete ,) + USE_FEATURE_FIND_EXEC( PARM_exec ,) + USE_FEATURE_FIND_PAREN( PARM_char_brace,) + /* All options starting from here require argument */ + PARM_name , + PARM_iname , + USE_FEATURE_FIND_PATH( PARM_path ,) + USE_FEATURE_FIND_REGEX( PARM_regex ,) + USE_FEATURE_FIND_TYPE( PARM_type ,) + USE_FEATURE_FIND_PERM( PARM_perm ,) + USE_FEATURE_FIND_MTIME( PARM_mtime ,) + USE_FEATURE_FIND_MMIN( PARM_mmin ,) + USE_FEATURE_FIND_NEWER( PARM_newer ,) + USE_FEATURE_FIND_INUM( PARM_inum ,) + USE_FEATURE_FIND_USER( PARM_user ,) + USE_FEATURE_FIND_GROUP( PARM_group ,) + USE_FEATURE_FIND_SIZE( PARM_size ,) + USE_FEATURE_FIND_CONTEXT(PARM_context ,) + }; + + static const char params[] ALIGN1 = + "-a\0" + "-o\0" + USE_FEATURE_FIND_NOT( "!\0" ) +#if ENABLE_DESKTOP + "-and\0" + "-or\0" + USE_FEATURE_FIND_NOT( "-not\0" ) +#endif + "-print\0" + USE_FEATURE_FIND_PRINT0( "-print0\0" ) + USE_FEATURE_FIND_DEPTH( "-depth\0" ) + USE_FEATURE_FIND_PRUNE( "-prune\0" ) + USE_FEATURE_FIND_DELETE( "-delete\0" ) + USE_FEATURE_FIND_EXEC( "-exec\0" ) + USE_FEATURE_FIND_PAREN( "(\0" ) + /* All options starting from here require argument */ + "-name\0" + "-iname\0" + USE_FEATURE_FIND_PATH( "-path\0" ) + USE_FEATURE_FIND_REGEX( "-regex\0" ) + USE_FEATURE_FIND_TYPE( "-type\0" ) + USE_FEATURE_FIND_PERM( "-perm\0" ) + USE_FEATURE_FIND_MTIME( "-mtime\0" ) + USE_FEATURE_FIND_MMIN( "-mmin\0" ) + USE_FEATURE_FIND_NEWER( "-newer\0" ) + USE_FEATURE_FIND_INUM( "-inum\0" ) + USE_FEATURE_FIND_USER( "-user\0" ) + USE_FEATURE_FIND_GROUP( "-group\0" ) + USE_FEATURE_FIND_SIZE( "-size\0" ) + USE_FEATURE_FIND_CONTEXT("-context\0") + ; + + action*** appp; + unsigned cur_group = 0; + unsigned cur_action = 0; + USE_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; + USE_FEATURE_FIND_NOT( ap->invert = invert_flag; ) + USE_FEATURE_FIND_NOT( invert_flag = 0; ) + return ap; } - /* Parse any options */ - for (i = firstopt; i < argc; i++) { - if (strcmp(argv[i], "-follow") == 0) - dereference = TRUE; - else if (strcmp(argv[i], "-print") == 0) { - ; - } - else if (strcmp(argv[i], "-name") == 0) { - if (++i == argc) - bb_error_msg_and_die(msg_req_arg, "-name"); - pattern = argv[i]; -#ifdef CONFIG_FEATURE_FIND_TYPE - } else if (strcmp(argv[i], "-type") == 0) { - if (++i == argc) - bb_error_msg_and_die(msg_req_arg, "-type"); - type_mask = find_type(argv[i]); -#endif -#ifdef CONFIG_FEATURE_FIND_PERM - } else if (strcmp(argv[i], "-perm") == 0) { - char *end; - if (++i == argc) - bb_error_msg_and_die(msg_req_arg, "-perm"); - perm_mask = strtol(argv[i], &end, 8); - if ((end[0] != '\0') || (perm_mask > 07777)) - bb_error_msg_and_die(msg_invalid_arg, argv[i], "-perm"); - if ((perm_char = argv[i][0]) == '-') - perm_mask = -perm_mask; -#endif -#ifdef CONFIG_FEATURE_FIND_MTIME - } else if (strcmp(argv[i], "-mtime") == 0) { - char *end; - if (++i == argc) - bb_error_msg_and_die(msg_req_arg, "-mtime"); - mtime_days = strtol(argv[i], &end, 10); - if (end[0] != '\0') - bb_error_msg_and_die(msg_invalid_arg, argv[i], "-mtime"); - if ((mtime_char = argv[i][0]) == '-') - mtime_days = -mtime_days; -#endif -#ifdef CONFIG_FEATURE_FIND_XDEV - } else if (strcmp(argv[i], "-xdev") == 0) { - struct stat stbuf; +#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? */ - xdev_count = ( firstopt - 1 ) ? ( firstopt - 1 ) : 1; - xdev_dev = xmalloc ( xdev_count * sizeof( dev_t )); + /* --- Operators --- */ + if (parm == PARM_a USE_DESKTOP(|| parm == PARM_and)) { + /* no further special handling required */ + } + else if (parm == PARM_o USE_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 USE_DESKTOP(|| parm == PARM_not)) { + /* also handles "find ! ! -name 'foo*'" */ + invert_flag ^= 1; + } +#endif - if ( firstopt == 1 ) { - if ( stat ( ".", &stbuf ) < 0 ) - bb_error_msg_and_die("could not stat '.'" ); - xdev_dev [0] = stbuf. st_dev; + /* --- Tests and actions --- */ + else if (parm == PARM_print) { + need_print = 0; + /* GNU find ignores '!' here: "find ! -print" */ + USE_FEATURE_FIND_NOT( invert_flag = 0; ) + (void) ALLOC_ACTION(print); + } +#if ENABLE_FEATURE_FIND_PRINT0 + else if (parm == PARM_print0) { + need_print = 0; + USE_FEATURE_FIND_NOT( invert_flag = 0; ) + (void) ALLOC_ACTION(print0); + } +#endif +#if ENABLE_FEATURE_FIND_DEPTH + else if (parm == PARM_depth) { + recurse_flags |= ACTION_DEPTHFIRST; + } +#endif +#if ENABLE_FEATURE_FIND_PRUNE + else if (parm == PARM_prune) { + USE_FEATURE_FIND_NOT( invert_flag = 0; ) + (void) ALLOC_ACTION(prune); + } +#endif +#if ENABLE_FEATURE_FIND_DELETE + else if (parm == PARM_delete) { + need_print = 0; + recurse_flags |= ACTION_DEPTHFIRST; + (void) ALLOC_ACTION(delete); + } +#endif +#if ENABLE_FEATURE_FIND_EXEC + else if (parm == PARM_exec) { + int i; + action_exec *ap; + need_print = 0; + USE_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 ';' until end */ + bb_error_msg_and_die("-exec CMD must end by ';'"); + if (LONE_CHAR(argv[0], ';')) + break; + argv++; + ap->exec_argc++; } - else { - - for (i = 1; i < firstopt; i++) { - if ( stat ( argv [i], &stbuf ) < 0 ) - bb_error_msg_and_die("could not stat '%s'", argv [i] ); - xdev_dev [i-1] = stbuf. st_dev; + 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 -#ifdef CONFIG_FEATURE_FIND_NEWER - } else if (strcmp(argv[i], "-newer") == 0) { + 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; - if (++i == argc) - bb_error_msg_and_die(msg_req_arg, "-newer"); - if (stat (argv[i], &stat_newer) != 0) - bb_error_msg_and_die("file %s not found", argv[i]); - newer_mtime = stat_newer.st_mtime; -#endif -#ifdef CONFIG_FEATURE_FIND_INUM - } else if (strcmp(argv[i], "-inum") == 0) { - char *end; - if (++i == argc) - bb_error_msg_and_die(msg_req_arg, "-inum"); - inode_num = strtol(argv[i], &end, 10); - if (end[0] != '\0') - bb_error_msg_and_die(msg_invalid_arg, argv[i], "-inum"); -#endif - } else + 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 }, + { } + }; + 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 + 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, char **argv) +{ + static const char options[] ALIGN1 = + "-follow\0" +USE_FEATURE_FIND_XDEV( "-xdev\0" ) +USE_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0") + ; + enum { + OPT_FOLLOW, +USE_FEATURE_FIND_XDEV( OPT_XDEV ,) +USE_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 + + for (firstopt = 1; firstopt < argc; 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) { - if (! recursive_action(".", TRUE, dereference, FALSE, fileAction, - fileAction, NULL)) - status = EXIT_FAILURE; - } else { - for (i = 1; i < firstopt; i++) { - if (! recursive_action(argv[i], TRUE, dereference, FALSE, fileAction, - fileAction, NULL)) - status = EXIT_FAILURE; + 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) { + recurse_flags |= ACTION_FOLLOWLINKS; + argp[0] = (char*)"-a"; } +#if ENABLE_FEATURE_FIND_XDEV + if (opt == OPT_XDEV) { + struct stat stbuf; + if (!xdev_count) { + xdev_count = firstopt - 1; + xdev_dev = xmalloc(xdev_count * sizeof(dev_t)); + for (i = 1; i < firstopt; i++) { + /* not xstat(): shouldn't bomb out on + * "find not_exist exist -xdev" */ + if (stat(argv[i], &stbuf)) + stbuf.st_dev = -1L; + xdev_dev[i-1] = stbuf.st_dev; + } + } + 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++; } + actions = parse_params(&argv[firstopt]); + + for (i = 1; i < firstopt; i++) { + if (!recursive_action(argv[i], + 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; } |