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

/* vi: set sw=4 ts=4: */
/*
 * Mini mv implementation for busybox
 *
 * Copyright (C) 2000 by 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.
 *
 * 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
 *
 */

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
 *
 * Size reduction and improved error checking.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <stdlib.h>
#include <getopt.h> /* struct option */
#include "busybox.h"
#include "libcoreutils/coreutils.h"

#if ENABLE_FEATURE_MV_LONG_OPTIONS
static const struct option mv_long_options[] = {
    { "interactive", 0, NULL, 'i' },
    { "force", 0, NULL, 'f' },
    { 0, 0, 0, 0 }
};
#endif

#define OPT_FILEUTILS_FORCE       1
#define OPT_FILEUTILS_INTERACTIVE 2

static const char fmt[] = "cannot overwrite %sdirectory with %sdirectory";

int mv_main(int argc, char **argv)
{
    struct stat dest_stat;
    const char *last;
    const char *dest;
    unsigned long flags;
    int dest_exists;
    int status = 0;

#if ENABLE_FEATURE_MV_LONG_OPTIONS
    bb_applet_long_options = mv_long_options;
#endif
    bb_opt_complementally = "f-i:i-f";
    flags = bb_getopt_ulflags(argc, argv, "fi");
    if (optind + 2 > argc) {
        bb_show_usage();
    }

    last = argv[argc - 1];
    argv += optind;

    if (optind + 2 == argc) {
        if ((dest_exists = cp_mv_stat(last, &dest_stat)) < 0) {
            return 1;
        }

        if (!(dest_exists & 2)) {
            dest = last;
            goto DO_MOVE;
        }
    }

    do {
        dest = concat_path_file(last, bb_get_last_path_component(*argv));

        if ((dest_exists = cp_mv_stat(dest, &dest_stat)) < 0) {
            goto RET_1;
        }

DO_MOVE:

        if (dest_exists && !(flags & OPT_FILEUTILS_FORCE) &&
            ((access(dest, W_OK) < 0 && isatty(0)) ||
            (flags & OPT_FILEUTILS_INTERACTIVE))) {
            if (fprintf(stderr, "mv: overwrite `%s'? ", dest) < 0) {
                goto RET_1; /* Ouch! fprintf failed! */
            }
            if (!bb_ask_confirmation()) {
                goto RET_0;
            }
        }
        if (rename(*argv, dest) < 0) {
            struct stat source_stat;
            int source_exists;

            if (errno != EXDEV ||
                (source_exists = cp_mv_stat(*argv, &source_stat)) < 1) {
                bb_perror_msg("unable to rename `%s'", *argv);
            } else {
                if (dest_exists) {
                    if (dest_exists == 3) {
                        if (source_exists != 3) {
                            bb_error_msg(fmt, "", "non-");
                            goto RET_1;
                        }
                    } else {
                        if (source_exists == 3) {
                            bb_error_msg(fmt, "non-", "");
                            goto RET_1;
                        }
                    }
                    if (unlink(dest) < 0) {
                        bb_perror_msg("cannot remove `%s'", dest);
                        goto RET_1;
                    }
                }
                if ((copy_file(*argv, dest,
                    FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS) >= 0) &&
                    (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)) {
                    goto RET_0;
                }
            }
RET_1:
            status = 1;
        }
RET_0:
        if (dest != last) {
            free((void *) dest);
        }
    } while (*++argv != last);

    return (status);
}