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hush/findutils/find.c
Denis Vlasenko 9b49a5ed85 add -fvisibility=hidden to CC flags, mark XXX_main functions 
EXTERNALLY_VISIBLE. 5% size reduction of libbusybox.so
2007-10-11 10:05:36 +00:00

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/* 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
*/
#include <fnmatch.h>
#include "libbb.h"
#if ENABLE_FEATURE_FIND_REGEX
#include "xregex.h"
#endif
/* This is a NOEXEC applet. Be very careful! */
USE_FEATURE_FIND_XDEV(static dev_t *xdev_dev;)
USE_FEATURE_FIND_XDEV(static int xdev_count;)
typedef int (*action_fp)(const char *fileName, struct stat *statbuf, void *);
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, struct stat *statbuf, action_##name* ap)
ACTS(print)
ACTS(name, const char *pattern;)
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;))
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;
}
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, 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])) {
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) { /* "foo/bar/". Oh no... go back to 'b' */
tmp--;
while (tmp != fileName && *--tmp != '/')
continue;
if (*tmp == '/')
tmp++;
}
return fnmatch(ap->pattern, tmp, FNM_PERIOD) == 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;
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
#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
static int fileAction(const char *fileName, struct stat *statbuf, void *userData, int depth)
{
int i;
#if ENABLE_FEATURE_FIND_MAXDEPTH
int maxdepth = (int)(ptrdiff_t)userData;
if (depth > maxdepth) return SKIP;
#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
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;
}
#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
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 ,
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 ,
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"
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; )
/* 'static' doesn't work here! (gcc 4.1.2) */
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;
}
#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 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
/* --- 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++;
}
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) {
action_name *ap;
ap = ALLOC_ACTION(name);
ap->pattern = arg1;
}
#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 },
{ }
};
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("-maxdepth\0")
;
enum {
OPT_FOLLOW,
USE_FEATURE_FIND_XDEV( OPT_XDEV ,)
USE_FEATURE_FIND_MAXDEPTH(OPT_MAXDEPTH,)
};
char *arg;
char **argp;
int i, firstopt, status = EXIT_SUCCESS;
#if ENABLE_FEATURE_FIND_MAXDEPTH
int maxdepth = INT_MAX;
#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) {
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_MAXDEPTH) {
if (!argp[1])
bb_show_usage();
maxdepth = 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
/* double cast suppresses
* "cast to ptr from int of different size" */
(void*)(ptrdiff_t)maxdepth,/* user data */
#else
NULL, /* user data */
#endif
0)) /* depth */
status = EXIT_FAILURE;
}
return status;
}
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