source: MondoRescue/branches/stable/mindi-busybox/coreutils/chown.c@ 821

/* vi: set sw=4 ts=4: */
/*
 * Mini chown implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* BB_AUDIT SUSv3 defects - unsupported options -h, -H, -L, and -P. */
/* BB_AUDIT GNU defects - unsupported options -h, -c, -f, -v, and long options. */
/* BB_AUDIT Note: gnu chown does not support -H, -L, or -P. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */

#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "busybox.h"

static uid_t uid = -1;
static gid_t gid = -1;

static int (*chown_func)(const char *, uid_t, gid_t) = chown;

static int fileAction(const char *fileName, struct stat *statbuf,
        void ATTRIBUTE_UNUSED *junk)
{
    if (!chown_func(fileName,
                (uid == (uid_t)-1) ? statbuf->st_uid : uid,
                (gid == (gid_t)-1) ? statbuf->st_gid : gid)) {
        return TRUE;
    }
    bb_perror_msg("%s", fileName);  /* A filename could have % in it... */
    return FALSE;
}

#define FLAG_R 1
#define FLAG_h 2

int chown_main(int argc, char **argv)
{
    int flags;
    int retval = EXIT_SUCCESS;
    char *groupName;

    flags = bb_getopt_ulflags(argc, argv, "Rh");

    if (flags & FLAG_h) chown_func = lchown;

    if (argc - optind < 2) {
        bb_show_usage();
    }

    argv += optind;

    /* First, check if there is a group name here */
    if ((groupName = strchr(*argv, '.')) == NULL) {
        groupName = strchr(*argv, ':');
    }

    /* Check for the username and groupname */
    if (groupName) {
        *groupName++ = '\0';
        gid = get_ug_id(groupName, bb_xgetgrnam);
    }
    if (--groupName != *argv) uid = get_ug_id(*argv, bb_xgetpwnam);
    ++argv;

    /* Ok, ready to do the deed now */
    do {
        if (! recursive_action (*argv, (flags & FLAG_R), FALSE, FALSE,
                                fileAction, fileAction, NULL)) {
            retval = EXIT_FAILURE;
        }
    } while (*++argv);

    return retval;
}