coreutils/mv.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini mv implementation for busybox
   4  *
   5  * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   8  */
   9
  10 /* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
  11  *
  12  * Size reduction and improved error checking.
  13  */
  14
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <unistd.h>
  18 #include <dirent.h>
  19 #include <errno.h>
  20 #include <stdlib.h>
  21 #include <getopt.h> /* struct option */
  22 #include "busybox.h"
  23 #include "libcoreutils/coreutils.h"
  24
  25 #if ENABLE_FEATURE_MV_LONG_OPTIONS
  26 static const struct option mv_long_options[] = {
  27         { "interactive", 0, NULL, 'i' },
  28         { "force", 0, NULL, 'f' },
  29         { 0, 0, 0, 0 }
  30 };
  31 #endif
  32
  33 #define OPT_FILEUTILS_FORCE       1
  34 #define OPT_FILEUTILS_INTERACTIVE 2
  35
  36 static const char fmt[] = "cannot overwrite %sdirectory with %sdirectory";
  37
  38 int mv_main(int argc, char **argv)
  39 {
  40         struct stat dest_stat;
  41         const char *last;
  42         const char *dest;
  43         unsigned long flags;
  44         int dest_exists;
  45         int status = 0;
  46
  47 #if ENABLE_FEATURE_MV_LONG_OPTIONS
  48         bb_applet_long_options = mv_long_options;
  49 #endif
  50         bb_opt_complementally = "f-i:i-f";
  51         flags = bb_getopt_ulflags(argc, argv, "fi");
  52         if (optind + 2 > argc) {
  53                 bb_show_usage();
  54         }
  55
  56         last = argv[argc - 1];
  57         argv += optind;
  58
  59         if (optind + 2 == argc) {
  60                 if ((dest_exists = cp_mv_stat(last, &dest_stat)) < 0) {
  61                         return 1;
  62                 }
  63
  64                 if (!(dest_exists & 2)) {
  65                         dest = last;
  66                         goto DO_MOVE;
  67                 }
  68         }
  69
  70         do {
  71                 dest = concat_path_file(last, bb_get_last_path_component(*argv));
  72
  73                 if ((dest_exists = cp_mv_stat(dest, &dest_stat)) < 0) {
  74                         goto RET_1;
  75                 }
  76
  77 DO_MOVE:
  78
  79                 if (dest_exists && !(flags & OPT_FILEUTILS_FORCE) &&
  80                         ((access(dest, W_OK) < 0 && isatty(0)) ||
  81                         (flags & OPT_FILEUTILS_INTERACTIVE))) {
  82                         if (fprintf(stderr, "mv: overwrite `%s'? ", dest) < 0) {
  83                                 goto RET_1;     /* Ouch! fprintf failed! */
  84                         }
  85                         if (!bb_ask_confirmation()) {
  86                                 goto RET_0;
  87                         }
  88                 }
  89                 if (rename(*argv, dest) < 0) {
  90                         struct stat source_stat;
  91                         int source_exists;
  92
  93                         if (errno != EXDEV ||
  94                                 (source_exists = cp_mv_stat(*argv, &source_stat)) < 1) {
  95                                 bb_perror_msg("unable to rename `%s'", *argv);
  96                         } else {
  97                                 if (dest_exists) {
  98                                         if (dest_exists == 3) {
  99                                                 if (source_exists != 3) {
 100                                                         bb_error_msg(fmt, "", "non-");
 101                                                         goto RET_1;
 102                                                 }
 103                                         } else {
 104                                                 if (source_exists == 3) {
 105                                                         bb_error_msg(fmt, "non-", "");
 106                                                         goto RET_1;
 107                                                 }
 108                                         }
 109                                         if (unlink(dest) < 0) {
 110                                                 bb_perror_msg("cannot remove `%s'", dest);
 111                                                 goto RET_1;
 112                                         }
 113                                 }
 114                                 if ((copy_file(*argv, dest,
 115                                         FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS) >= 0) &&
 116                                         (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)) {
 117                                         goto RET_0;
 118                                 }
 119                         }
 120 RET_1:
 121                         status = 1;
 122                 }
 123 RET_0:
 124                 if (dest != last) {
 125                         free((void *) dest);
 126                 }
 127         } while (*++argv != last);
 128
 129         return (status);
 130 }