/* 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
 */
//config:config FIND
//config:       bool "find (14 kb)"
//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:
//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_EXECUTABLE
//config:       bool "Enable -executable: file is executable"
//config:       default y
//config:       depends on FIND
//config:
//config:config FEATURE_FIND_XDEV
//config:       bool "Enable -xdev: 'stay in filesystem'"
//config:       default y
//config:       depends on FIND
//config:
//config:config FEATURE_FIND_MAXDEPTH
//config:       bool "Enable -mindepth N and -maxdepth N"
//config:       default y
//config:       depends on FIND
//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:       modification 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:
//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_EXEC_PLUS
//config:       bool "Enable -exec ... {} +"
//config:       default y
//config:       depends on FEATURE_FIND_EXEC
//config:       help
//config:       Support the 'find -exec ... {} +' option for executing commands
//config:       for all matched files at once.
//config:       Without this option, -exec + is a synonym for -exec ;
//config:       (IOW: it works correctly, but without expected speedup)
//config:
//config:config FEATURE_FIND_USER
//config:       bool "Enable -user: username/uid matching"
//config:       default y
//config:       depends on FIND
//config:
//config:config FEATURE_FIND_GROUP
//config:       bool "Enable -group: group/gid matching"
//config:       default y
//config:       depends on FIND
//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:
//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, don't descend into it. Useful for
//config:       exclusion .svn and CVS directories.
//config:
//config:config FEATURE_FIND_QUIT
//config:       bool "Enable -quit: exit"
//config:       default y
//config:       depends on FIND
//config:       help
//config:       If this action is reached, 'find' exits.
//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_EMPTY
//config:       bool "Enable -empty: match empty files or directories"
//config:       default y
//config:       depends on FIND
//config:       help
//config:       Support the 'find -empty' option to find empty regular files
//config:       or directories.
//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.

//applet:IF_FIND(APPLET_NOEXEC(find, find, BB_DIR_USR_BIN, BB_SUID_DROP, find))

//kbuild:lib-$(CONFIG_FIND) += find.o

//usage:#define find_trivial_usage
//usage:       "[-HL] [PATH]... [OPTIONS] [ACTIONS]"
//usage:#define find_full_usage "\n\n"
//usage:       "Search for files and perform actions on them.\n"
//usage:       "First failed action stops processing of current file.\n"
//usage:       "Defaults: PATH is current directory, action is '-print'\n"
//usage:     "\n        -L,-follow      Follow symlinks"
//usage:     "\n        -H              ...on command line only"
//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                        actions to command line arguments only"
//usage:     "\n        -mindepth N     Don't act on first N levels"
//usage:        )
//usage:        IF_FEATURE_FIND_DEPTH(
//usage:     "\n        -depth          Act on directory *after* traversing it"
//usage:        )
//usage:     "\n"
//usage:     "\nActions:"
//usage:        IF_FEATURE_FIND_PAREN(
//usage:     "\n        ( ACTIONS )     Group actions for -o / -a"
//usage:        )
//usage:        IF_FEATURE_FIND_NOT(
//usage:     "\n        ! ACT           Invert ACT's success/failure"
//usage:        )
//usage:     "\n        ACT1 [-a] ACT2  If ACT1 fails, stop, else do ACT2"
//usage:     "\n        ACT1 -o ACT2    If ACT1 succeeds, stop, else do ACT2"
//usage:     "\n                        Note: -a has higher priority than -o"
//usage:     "\n        -name PATTERN   Match file name (w/o directory name) to PATTERN"
//usage:     "\n        -iname PATTERN  Case insensitive -name"
//usage:        IF_FEATURE_FIND_PATH(
//usage:     "\n        -path PATTERN   Match path to PATTERN"
//usage:     "\n        -ipath PATTERN  Case insensitive -path"
//usage:        )
//usage:        IF_FEATURE_FIND_REGEX(
//usage:     "\n        -regex PATTERN  Match path to regex PATTERN"
//usage:        )
//usage:        IF_FEATURE_FIND_TYPE(
//usage:     "\n        -type X         File type is X (one of: f,d,l,b,c,s,p)"
//usage:        )
//usage:        IF_FEATURE_FIND_EXECUTABLE(
//usage:     "\n        -executable     File is executable"
//usage:        )
//usage:        IF_FEATURE_FIND_PERM(
//usage:     "\n        -perm MASK      At least one mask bit (+MASK), all bits (-MASK),"
//usage:     "\n                        or exactly MASK bits are set in file's mode"
//usage:        )
//usage:        IF_FEATURE_FIND_MTIME(
//usage:     "\n        -mtime DAYS     mtime is greater than (+N), less than (-N),"
//usage:     "\n                        or exactly N days in the past"
//usage:        )
//usage:        IF_FEATURE_FIND_MMIN(
//usage:     "\n        -mmin MINS      mtime is greater than (+N), less than (-N),"
//usage:     "\n                        or exactly N minutes in the past"
//usage:        )
//usage:        IF_FEATURE_FIND_NEWER(
//usage:     "\n        -newer FILE     mtime 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/ID   File is owned by given user"
//usage:        )
//usage:        IF_FEATURE_FIND_GROUP(
//usage:     "\n        -group NAME/ID  File is owned by given group"
//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:        IF_FEATURE_FIND_CONTEXT(
//usage:     "\n        -context CTX    File has specified security context"
//usage:        )
//usage:        IF_FEATURE_FIND_EMPTY(
//usage:     "\n        -empty          Match empty file/directory"
//usage:        )
//usage:        IF_FEATURE_FIND_PRUNE(
//usage:     "\n        -prune          If current file is directory, don't descend into it"
//usage:        )
//usage:     "\nIf none of the following actions is specified, -print is assumed"
//usage:     "\n        -print          Print file name"
//usage:        IF_FEATURE_FIND_PRINT0(
//usage:     "\n        -print0         Print file name, NUL terminated"
//usage:        )
//usage:        IF_FEATURE_FIND_EXEC(
//usage:     "\n        -exec CMD ARG ; Run CMD with all instances of {} replaced by"
//usage:     "\n                        file name. Fails if CMD exits with nonzero"
//usage:        )
//usage:        IF_FEATURE_FIND_EXEC_PLUS(
//usage:     "\n        -exec CMD ARG + Run CMD with {} replaced by list of file names"
//usage:        )
//usage:        IF_FEATURE_FIND_DELETE(
//usage:     "\n        -delete         Delete current file/directory. Turns on -depth option"
//usage:        )
//usage:        IF_FEATURE_FIND_QUIT(
//usage:     "\n        -quit           Exit"
//usage:        )
//usage:
//usage:#define find_example_usage
//usage:       "$ find / -name passwd\n"
//usage:       "/etc/passwd\n"

#include <fnmatch.h>
#include "libbb.h"
#include "common_bufsiz.h"
#if ENABLE_FEATURE_FIND_REGEX
# include "xregex.h"
#endif
/* GNUism: */
#ifndef FNM_CASEFOLD
# define FNM_CASEFOLD 0
#endif

#if 1
# define dbg(...) ((void)0)
#else
# define dbg(...) bb_error_msg(__VA_ARGS__)
#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; bool ipath;))
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_EXECUTABLE(ACTS(executable))
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_QUIT(   ACTS(quit))
IF_FEATURE_FIND_DELETE( ACTS(delete))
IF_FEATURE_FIND_EMPTY(  ACTS(empty))
IF_FEATURE_FIND_EXEC(   ACTS(exec,
                                char **exec_argv; /* -exec ARGS */
                                unsigned *subst_count;
                                int exec_argc; /* count of ARGS */
                                IF_FEATURE_FIND_EXEC_PLUS(
                                        /*
                                         * filelist is NULL if "exec ;"
                                         * non-NULL if "exec +"
                                         */
                                        char **filelist;
                                        int filelist_idx;
                                        int file_len;
                                )
                                ))
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;)
#if ENABLE_FEATURE_FIND_MAXDEPTH
        int minmaxdepth[2];
#endif
        action ***actions;
        smallint need_print;
        smallint xdev_on;
        smalluint exitstatus;
        recurse_flags_t recurse_flags;
        IF_FEATURE_FIND_EXEC_PLUS(unsigned max_argv_len;)
} FIX_ALIASING;
#define G (*(struct globals*)bb_common_bufsiz1)
#define INIT_G() do { \
        setup_common_bufsiz(); \
        BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
        /* we have to zero it out because of NOEXEC */ \
        memset(&G, 0, sizeof(G)); \
        IF_FEATURE_FIND_MAXDEPTH(G.minmaxdepth[1] = INT_MAX;) \
        IF_FEATURE_FIND_EXEC_PLUS(G.max_argv_len = bb_arg_max() - 2048;) \
        G.need_print = 1; \
        G.recurse_flags = ACTION_RECURSE; \
} while (0)

/* 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
                        dbg("grp %d action %d rc:0x%x", cur_group, cur_action, rc);
                        if (rc & TRUE) /* current group failed, try next */
                                break;
                }
        }
        dbg("returning:0x%x", rc ^ TRUE);
        return rc ^ TRUE; /* restore TRUE bit */
}

#if !FNM_CASEFOLD
static char *strcpy_upcase(char *dst, const char *src)
{
        char *d = dst;
        while (1) {
                unsigned char ch = *src++;
                if (ch >= 'a' && ch <= 'z')
                        ch -= ('a' - 'A');
                *d++ = ch;
                if (ch == '\0')
                        break;
        }
        return dst;
}
#endif

ACTF(name)
{
        int r;
        const char *tmp = bb_basename(fileName);
        /* GNU findutils: find DIR/ -name DIR
         * prints "DIR/" (DIR// prints "DIR//" etc).
         * Need to strip trailing "/".
         * Such names can come only from top-level names, but
         * we can't do this before recursive_action() call,
         * since then "find FILE/ -name FILE"
         * would also work (on non-directories), which is wrong.
         */
        char *trunc_slash = NULL;

        if (*tmp == '\0') {
                /* "foo/bar/[//...]" */
                while (tmp != fileName && tmp[-1] == '/')
                        tmp--;
                if (tmp == fileName) { /* entire fileName is "//.."? */
                        /* yes, convert "//..." to "/"
                         * Testcases:
                         * find / -maxdepth 1 -name /: prints /
                         * find // -maxdepth 1 -name /: prints //
                         * find / -maxdepth 1 -name //: prints nothing
                         * find // -maxdepth 1 -name //: prints nothing
                         */
                        if (tmp[1])
                                trunc_slash = (char*)tmp + 1;
                } else {
                        /* no, it's "foo/bar/[//...]", go back to 'b' */
                        trunc_slash = (char*)tmp;
                        while (tmp != fileName && tmp[-1] != '/')
                                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:
         */
        if (trunc_slash) *trunc_slash = '\0';
#if FNM_CASEFOLD
        r = fnmatch(ap->pattern, tmp, (ap->iname ? FNM_CASEFOLD : 0));
#else
        if (ap->iname)
                tmp = strcpy_upcase(alloca(strlen(tmp) + 1), tmp);
        r = fnmatch(ap->pattern, tmp, 0);
#endif
        if (trunc_slash) *trunc_slash = '/';
        return r == 0;
}

#if ENABLE_FEATURE_FIND_PATH
ACTF(path)
{
# if FNM_CASEFOLD
        return fnmatch(ap->pattern, fileName, (ap->ipath ? FNM_CASEFOLD : 0)) == 0;
# else
        if (ap->ipath)
                fileName = strcpy_upcase(alloca(strlen(fileName) + 1), fileName);
        return fnmatch(ap->pattern, fileName, 0) == 0;
# endif
}
#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_EXECUTABLE
ACTF(executable)
{
        return access(fileName, X_OK) == 0;
}
#endif
#if ENABLE_FEATURE_FIND_PERM
ACTF(perm)
{
        /* -perm [+/]mode: at least one of perm_mask bits are set */
        if (ap->perm_char == '+' || 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
static int do_exec(action_exec *ap, const char *fileName)
{
        int i, rc;
# if ENABLE_FEATURE_FIND_EXEC_PLUS
        int size = ap->exec_argc + ap->filelist_idx + 1;
# else
        int size = ap->exec_argc + 1;
# endif
# if ENABLE_USE_PORTABLE_CODE
        char **argv = alloca(sizeof(char*) * size);
# else /* gcc 4.3.1 generates smaller code: */
        char *argv[size];
# endif
        char **pp = argv;

        for (i = 0; i < ap->exec_argc; i++) {
                const char *arg = ap->exec_argv[i];

# if ENABLE_FEATURE_FIND_EXEC_PLUS
                if (ap->filelist) {
                        /* Handling "-exec +"
                         * Only one exec_argv[i] has substitution in it.
                         * Expand that one exec_argv[i] into file list.
                         */
                        if (ap->subst_count[i] == 0) {
                                *pp++ = xstrdup(arg);
                        } else {
                                int j = 0;
                                while (ap->filelist[j]) {
                                        /* 2nd arg here should be ap->subst_count[i], but it is always 1: */
                                        *pp++ = xmalloc_substitute_string(arg, 1, "{}", ap->filelist[j]);
                                        free(ap->filelist[j]);
                                        j++;
                                }
                        }
                } else
# endif
                {
                        /* Handling "-exec ;" */
                        *pp++ = xmalloc_substitute_string(arg, ap->subst_count[i], "{}", fileName);
                }
        }
        *pp = NULL; /* terminate the list */

# if ENABLE_FEATURE_FIND_EXEC_PLUS
        if (ap->filelist) {
                ap->filelist[0] = NULL;
                ap->filelist_idx = 0;
                ap->file_len = 0;
        }
# endif

        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 */
}
ACTF(exec)
{
# if ENABLE_FEATURE_FIND_EXEC_PLUS
        if (ap->filelist) {
                int rc;

                ap->filelist = xrealloc_vector(ap->filelist, 8, ap->filelist_idx);
                ap->filelist[ap->filelist_idx++] = xstrdup(fileName);
                ap->file_len += strlen(fileName) + sizeof(char*) + 1;
                /* If we have lots of files already, exec the command */
                rc = 1;
                if (ap->file_len >= G.max_argv_len)
                        rc = do_exec(ap, NULL);
                return rc;
        }
# endif
        return do_exec(ap, fileName);
}
# if ENABLE_FEATURE_FIND_EXEC_PLUS
static int flush_exec_plus(void)
{
        action *ap;
        action **app;
        action ***appp = G.actions;
        while ((app = *appp++) != NULL) {
                while ((ap = *app++) != NULL) {
                        if (ap->f == (action_fp)func_exec) {
                                action_exec *ae = (void*)ap;
                                if (ae->filelist_idx != 0) {
                                        int rc = do_exec(ae, NULL);
#  if ENABLE_FEATURE_FIND_NOT
                                        if (ap->invert) rc = !rc;
#  endif
                                        if (rc == 0)
                                                return 1;
                                }
                        }
                }
        }
        return 0;
}
# endif
#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_QUIT
ACTF(quit)
{
        exit(G.exitstatus);
}
#endif
#if ENABLE_FEATURE_FIND_DELETE
ACTF(delete)
{
        int rc;
        if (S_ISDIR(statbuf->st_mode)) {
                /* "find . -delete" skips rmdir(".") */
                rc = 0;
                if (NOT_LONE_CHAR(fileName, '.'))
                        rc = rmdir(fileName);
        } else {
                rc = unlink(fileName);
        }
        if (rc < 0)
                bb_simple_perror_msg(fileName);
        return TRUE;
}
#endif
#if ENABLE_FEATURE_FIND_EMPTY
ACTF(empty)
{
        if (S_ISDIR(statbuf->st_mode)) {
                DIR *dir;
                struct dirent *dent;

                dir = opendir(fileName);
                if (!dir) {
                        bb_simple_perror_msg(fileName);
                        return FALSE;
                }

                while ((dent = readdir(dir)) != NULL
                 && DOT_OR_DOTDOT(dent->d_name)
                ) {
                        continue;
                }
                closedir(dir);
                return dent == NULL;
        }
        return S_ISREG(statbuf->st_mode) && statbuf->st_size == 0;
}
#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(
                struct recursive_state *state IF_NOT_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM),
                const char *fileName,
                struct stat *statbuf)
{
        int r;
        int same_fs = 1;

#if ENABLE_FEATURE_FIND_XDEV
        if (S_ISDIR(statbuf->st_mode) && G.xdev_count) {
                int i;
                for (i = 0; i < G.xdev_count; i++) {
                        if (G.xdev_dev[i] == statbuf->st_dev)
                                goto found;
                }
                //bb_error_msg("'%s': not same fs", fileName);
                same_fs = 0;
 found: ;
        }
#endif

#if ENABLE_FEATURE_FIND_MAXDEPTH
        if (state->depth < G.minmaxdepth[0]) {
                if (same_fs)
                        return TRUE; /* skip this, continue recursing */
                return SKIP; /* stop recursing */
        }
        if (state->depth > G.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 (state->depth == G.minmaxdepth[1])
                        return SKIP;
        }
#endif
        /* -xdev stops on mountpoints, but AFTER mountpoit itself
         * is processed as usual */
        if (!same_fs) {
                return SKIP;
        }

        /* Cannot return 0: our caller, recursive_action(),
         * will perror() and skip dirs (if called on dir) */
        return (r & 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_to, 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

/* Say no to GCCism */
#define USE_NESTED_FUNCTION 0

#if !USE_NESTED_FUNCTION
struct pp_locals {
        action*** appp;
        unsigned cur_group;
        unsigned cur_action;
        IF_FEATURE_FIND_NOT( bool invert_flag; )
};
static action* alloc_action(struct pp_locals *ppl, int sizeof_struct, action_fp f)
{
        action *ap = xzalloc(sizeof_struct);
        action **app;
        action ***group = &ppl->appp[ppl->cur_group];
        *group = app = xrealloc(*group, (ppl->cur_action+2) * sizeof(ppl->appp[0][0]));
        app[ppl->cur_action++] = ap;

        app[ppl->cur_action] = NULL;
        ap->f = f;
        IF_FEATURE_FIND_NOT( ap->invert = ppl->invert_flag; )
        IF_FEATURE_FIND_NOT( ppl->invert_flag = 0; )
        return ap;
}
#endif

static action*** parse_params(char **argv)
{
        enum {
                                OPT_FOLLOW     ,
        IF_FEATURE_FIND_XDEV(   OPT_XDEV       ,)
        IF_FEATURE_FIND_DEPTH(  OPT_DEPTH      ,)
                                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_PRUNE(  PARM_prune     ,)
        IF_FEATURE_FIND_QUIT(   PARM_quit      ,)
        IF_FEATURE_FIND_DELETE( PARM_delete    ,)
        IF_FEATURE_FIND_EMPTY(  PARM_empty     ,)
        IF_FEATURE_FIND_EXEC(   PARM_exec      ,)
        IF_FEATURE_FIND_EXECUTABLE(PARM_executable,)
        IF_FEATURE_FIND_PAREN(  PARM_char_brace,)
        /* All options/actions starting from here require argument */
                                PARM_name      ,
                                PARM_iname     ,
        IF_FEATURE_FIND_PATH(   PARM_path      ,)
#if ENABLE_DESKTOP
        /* -wholename is a synonym for -path */
        /* We support it because Linux kernel's "make tags" uses it */
        IF_FEATURE_FIND_PATH(   PARM_wholename ,)
#endif
        IF_FEATURE_FIND_PATH(   PARM_ipath     ,)
        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     ,)
        IF_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,OPT_MAXDEPTH,)
        };

        static const char params[] ALIGN1 =
                                "-follow\0"
        IF_FEATURE_FIND_XDEV(   "-xdev\0"                 )
        IF_FEATURE_FIND_DEPTH(  "-depth\0"                )
                                "-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_PRUNE(  "-prune\0"  )
        IF_FEATURE_FIND_QUIT(   "-quit\0"  )
        IF_FEATURE_FIND_DELETE( "-delete\0" )
        IF_FEATURE_FIND_EMPTY(  "-empty\0"  )
        IF_FEATURE_FIND_EXEC(   "-exec\0"   )
        IF_FEATURE_FIND_EXECUTABLE("-executable\0")
        IF_FEATURE_FIND_PAREN(  "(\0"       )
        /* All options/actions starting from here require argument */
                                "-name\0"
                                "-iname\0"
        IF_FEATURE_FIND_PATH(   "-path\0"   )
#if ENABLE_DESKTOP
        IF_FEATURE_FIND_PATH(   "-wholename\0")
#endif
        IF_FEATURE_FIND_PATH(   "-ipath\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"  )
        IF_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0")
        ;

#if !USE_NESTED_FUNCTION
        struct pp_locals ppl;
#define appp        (ppl.appp       )
#define cur_group   (ppl.cur_group  )
#define cur_action  (ppl.cur_action )
#define invert_flag (ppl.invert_flag)
#define ALLOC_ACTION(name) (action_##name*)alloc_action(&ppl, sizeof(action_##name), (action_fp) func_##name)
#else
        action*** appp;
        unsigned cur_group;
        unsigned cur_action;
        IF_FEATURE_FIND_NOT( bool invert_flag; )

        /* 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[0][0]));
                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)
#endif

        cur_group = 0;
        cur_action = 0;
        IF_FEATURE_FIND_NOT( invert_flag = 0; )
        appp = xzalloc(2 * sizeof(appp[0])); /* appp[0],[1] == NULL */

        while (*argv) {
                const char *arg = argv[0];
                int parm = index_in_strings(params, arg);
                const char *arg1 = argv[1];

                dbg("arg:'%s' arg1:'%s' parm:%d PARM_type:%d", arg, arg1, parm, PARM_type);

                if (parm >= PARM_name) {
                        /* All options/actions 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? */

/* Options always return true. They always take effect
 * rather than being processed only when their place in the
 * expression is reached.
 */
                /* Options */
                if (parm == OPT_FOLLOW) {
                        dbg("follow enabled: %d", __LINE__);
                        G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK;
                }
#if ENABLE_FEATURE_FIND_XDEV
                else if (parm == OPT_XDEV) {
                        dbg("%d", __LINE__);
                        G.xdev_on = 1;
                }
#endif
#if ENABLE_FEATURE_FIND_MAXDEPTH
                else if (parm == OPT_MINDEPTH || parm == OPT_MINDEPTH + 1) {
                        dbg("%d", __LINE__);
                        G.minmaxdepth[parm - OPT_MINDEPTH] = xatoi_positive(arg1);
                }
#endif
#if ENABLE_FEATURE_FIND_DEPTH
                else if (parm == OPT_DEPTH) {
                        dbg("%d", __LINE__);
                        G.recurse_flags |= ACTION_DEPTHFIRST;
                }
#endif
/* 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
 */
                /* Operators */
                else if (parm == PARM_a IF_DESKTOP(|| parm == PARM_and)) {
                        dbg("%d", __LINE__);
                        /* no further special handling required */
                }
                else if (parm == PARM_o IF_DESKTOP(|| parm == PARM_or)) {
                        dbg("%d", __LINE__);
                        /* start new OR group */
                        cur_group++;
                        appp = xrealloc(appp, (cur_group+2) * sizeof(appp[0]));
                        /*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;
                        dbg("invert_flag:%d", invert_flag);
                }
#endif
                /* Actions */
                else if (parm == PARM_print) {
                        dbg("%d", __LINE__);
                        G.need_print = 0;
                        (void) ALLOC_ACTION(print);
                }
#if ENABLE_FEATURE_FIND_PRINT0
                else if (parm == PARM_print0) {
                        dbg("%d", __LINE__);
                        G.need_print = 0;
                        (void) ALLOC_ACTION(print0);
                }
#endif
#if ENABLE_FEATURE_FIND_PRUNE
                else if (parm == PARM_prune) {
                        dbg("%d", __LINE__);
                        (void) ALLOC_ACTION(prune);
                }
#endif
#if ENABLE_FEATURE_FIND_QUIT
                else if (parm == PARM_quit) {
                        dbg("%d", __LINE__);
                        (void) ALLOC_ACTION(quit);
                }
#endif
#if ENABLE_FEATURE_FIND_DELETE
                else if (parm == PARM_delete) {
                        dbg("%d", __LINE__);
                        G.need_print = 0;
                        G.recurse_flags |= ACTION_DEPTHFIRST;
                        (void) ALLOC_ACTION(delete);
                }
#endif
#if ENABLE_FEATURE_FIND_EMPTY
                else if (parm == PARM_empty) {
                        dbg("%d", __LINE__);
                        (void) ALLOC_ACTION(empty);
                }
#endif
#if ENABLE_FEATURE_FIND_EXEC
                else if (parm == PARM_exec) {
                        int i;
                        action_exec *ap;
                        IF_FEATURE_FIND_EXEC_PLUS(int all_subst = 0;)
                        dbg("%d", __LINE__);
                        G.need_print = 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...".
                                if ((argv[0][0] == ';' || argv[0][0] == '+')
                                 && argv[0][1] == '\0'
                                ) {
# if ENABLE_FEATURE_FIND_EXEC_PLUS
                                        if (argv[0][0] == '+')
                                                ap->filelist = xzalloc(sizeof(ap->filelist[0]));
# endif
                                        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_strstr(ap->exec_argv[i], "{}");
                                IF_FEATURE_FIND_EXEC_PLUS(all_subst += ap->subst_count[i];)
                        }
# if ENABLE_FEATURE_FIND_EXEC_PLUS
                        /*
                         * coreutils expects {} to appear only once in "-exec +"
                         */
                        if (all_subst != 1 && ap->filelist)
                                bb_simple_error_msg_and_die("only one '{}' allowed for -exec +");
# endif
                }
#endif
#if ENABLE_FEATURE_FIND_PAREN
                else if (parm == PARM_char_brace) {
                        action_paren *ap;
                        char **endarg;
                        unsigned nested = 1;

                        dbg("%d", __LINE__);
                        endarg = argv;
                        while (1) {
                                if (!*++endarg)
                                        bb_simple_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;
                        dbg("%d", __LINE__);
                        ap = ALLOC_ACTION(name);
                        ap->pattern = arg1;
                        ap->iname = (parm == PARM_iname);
                }
#if ENABLE_FEATURE_FIND_PATH
                else if (parm == PARM_path IF_DESKTOP(|| parm == PARM_wholename) || parm == PARM_ipath) {
                        action_path *ap;
                        dbg("%d", __LINE__);
                        ap = ALLOC_ACTION(path);
                        ap->pattern = arg1;
                        ap->ipath = (parm == PARM_ipath);
                }
#endif
#if ENABLE_FEATURE_FIND_REGEX
                else if (parm == PARM_regex) {
                        action_regex *ap;
                        dbg("%d", __LINE__);
                        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);
                        dbg("created:type mask:%x", ap->type_mask);
                }
#endif
#if ENABLE_FEATURE_FIND_EXECUTABLE
                else if (parm == PARM_executable) {
                        (void) ALLOC_ACTION(executable);
                }
#endif
#if ENABLE_FEATURE_FIND_PERM
/* -perm BITS   File's mode bits are exactly BITS (octal or symbolic).
 *              Symbolic modes use mode 0 as a point of departure.
 * -perm -BITS  All of the BITS are set in file's mode.
 * -perm [+/]BITS  At least one of the BITS is set in file's mode.
 */
                else if (parm == PARM_perm) {
                        action_perm *ap;
                        dbg("%d", __LINE__);
                        ap = ALLOC_ACTION(perm);
                        ap->perm_char = arg1[0];
                        arg1 = (arg1[0] == '/' ? arg1+1 : plus_minus_num(arg1));
                        /*ap->perm_mask = 0; - ALLOC_ACTION did it */
                        ap->perm_mask = bb_parse_mode(arg1, ap->perm_mask);
                        if (ap->perm_mask == (mode_t)-1)
                                bb_error_msg_and_die("invalid mode '%s'", arg1);
                }
#endif
#if ENABLE_FEATURE_FIND_MTIME
                else if (parm == PARM_mtime) {
                        action_mtime *ap;
                        dbg("%d", __LINE__);
                        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;
                        dbg("%d", __LINE__);
                        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;
                        dbg("%d", __LINE__);
                        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;
                        dbg("%d", __LINE__);
                        ap = ALLOC_ACTION(inum);
                        ap->inode_num = xatoul(arg1);
                }
#endif
#if ENABLE_FEATURE_FIND_USER
                else if (parm == PARM_user) {
                        action_user *ap;
                        dbg("%d", __LINE__);
                        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;
                        dbg("%d", __LINE__);
                        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[] ALIGN_SUFFIX = {
                                { "c", 1 },
                                { "w", 2 },
                                { "", 512 },
                                { "b", 512 },
                                { "k", 1024 },
                                { "", 0 }
                        };
                        action_size *ap;
                        dbg("%d", __LINE__);
                        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;
                        dbg("%d", __LINE__);
                        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;
                        dbg("%d", __LINE__);
                        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++;
        }
        dbg("exiting %s", __func__);
        return appp;
#undef ALLOC_ACTION
#undef appp
#undef cur_action
#undef invert_flag
}

int find_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int find_main(int argc UNUSED_PARAM, char **argv)
{
        int i, firstopt;
        char **past_HLP, *saved;

        INIT_G();

        /* "find -type f" + getopt("+HLP") => disaster.
         * Need to avoid getopt running into a non-HLP option.
         * Do this by temporarily storing NULL there:
         */
        past_HLP = argv;
        for (;;) {
                saved = *++past_HLP;
                if (!saved)
                        break;
                if (saved[0] != '-')
                        break;
                if (!saved[1])
                        break; /* it is "-" */
                if (saved[1] == '-' && !saved[2]) {
                        /* it is "--" */
                        /* Try: find -- /dev/null */
                        saved = *++past_HLP;
                        break;
                }
                if ((saved+1)[strspn(saved+1, "HLP")] != '\0')
                        break;
        }
        *past_HLP = NULL;
        /* "+": stop on first non-option */
        i = getopt32(argv, "+""HLP");
        if (i & (1<<0))
                G.recurse_flags |= ACTION_FOLLOWLINKS_L0 | ACTION_DANGLING_OK;
        if (i & (1<<1))
                G.recurse_flags |= ACTION_FOLLOWLINKS | ACTION_DANGLING_OK;
        /* -P is default and is ignored */
        argv = past_HLP; /* same result as "argv += optind;" */
        *past_HLP = saved;

        for (firstopt = 0; argv[firstopt]; firstopt++) {
                if (argv[firstopt][0] == '-')
                        break;
                if (ENABLE_FEATURE_FIND_NOT && LONE_CHAR(argv[firstopt], '!'))
                        break;
                if (ENABLE_FEATURE_FIND_PAREN && LONE_CHAR(argv[firstopt], '('))
                        break;
        }
        if (firstopt == 0) {
                *--argv = (char*)".";
                firstopt++;
        }

        G.actions = parse_params(&argv[firstopt]);
        argv[firstopt] = NULL;

#if ENABLE_FEATURE_FIND_XDEV
        if (G.xdev_on) {
                struct stat stbuf;

                G.xdev_count = firstopt;
                G.xdev_dev = xzalloc(G.xdev_count * sizeof(G.xdev_dev[0]));
                for (i = 0; argv[i]; i++) {
                        /* not xstat(): shouldn't bomb out on
                         * "find not_exist exist -xdev" */
                        if (stat(argv[i], &stbuf) == 0)
                                G.xdev_dev[i] = stbuf.st_dev;
                        /* else G.xdev_dev[i] stays 0 and
                         * won't match any real device dev_t
                         */
                }
        }
#endif

        for (i = 0; argv[i]; i++) {
                if (!recursive_action(argv[i],
                                G.recurse_flags,/* flags */
                                fileAction,     /* file action */
                                fileAction,     /* dir action */
                                NULL)           /* user data */
                ) {
                        G.exitstatus |= EXIT_FAILURE;
                }
        }

        IF_FEATURE_FIND_EXEC_PLUS(G.exitstatus |= flush_exec_plus();)
        return G.exitstatus;
}