git.maemo.org Git - busybox4maemo/blob - 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  * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
   7  *
   8  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   9  */
  10
  11 /* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
  12  *
  13  * Size reduction and improved error checking.
  14  */
  15
  16 #include <sys/types.h>
  17 #include <sys/stat.h>
  18 #include <dirent.h>
  19 #include <getopt.h> /* struct option */
  20 #include "libbb.h"
  21 #include "libcoreutils/coreutils.h"
  22
  23 #if ENABLE_FEATURE_MV_LONG_OPTIONS
  24 static const char mv_longopts[] ALIGN1 =
  25         "interactive\0" No_argument "i"
  26         "force\0"       No_argument "f"
  27         ;
  28 #endif
  29
  30 #define OPT_FILEUTILS_FORCE       1
  31 #define OPT_FILEUTILS_INTERACTIVE 2
  32
  33 static const char fmt[] ALIGN1 =
  34         "cannot overwrite %sdirectory with %sdirectory";
  35
  36 int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  37 int mv_main(int argc, char **argv)
  38 {
  39         struct stat dest_stat;
  40         const char *last;
  41         const char *dest;
  42         unsigned long flags;
  43         int dest_exists;
  44         int status = 0;
  45         int copy_flag = 0;
  46
  47 #if ENABLE_FEATURE_MV_LONG_OPTIONS
  48         applet_long_options = mv_longopts;
  49 #endif
  50         // Need at least two arguments
  51         // -f unsets -i, -i unsets -f
  52         opt_complementary = "-2:f-i:i-f";
  53         flags = getopt32(argv, "fi");
  54         argc -= optind;
  55         argv += optind;
  56         last = argv[argc - 1];
  57
  58         if (argc == 2) {
  59                 dest_exists = cp_mv_stat(last, &dest_stat);
  60                 if (dest_exists < 0) {
  61                         return EXIT_FAILURE;
  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_strip(*argv));
  72                 dest_exists = cp_mv_stat(dest, &dest_stat);
  73                 if (dest_exists < 0) {
  74                         goto RET_1;
  75                 }
  76
  77  DO_MOVE:
  78                 if (dest_exists && !(flags & OPT_FILEUTILS_FORCE)
  79                  && ((access(dest, W_OK) < 0 && isatty(0))
  80                     || (flags & OPT_FILEUTILS_INTERACTIVE))
  81                 ) {
  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                         ) {
  96                                 bb_perror_msg("cannot rename '%s'", *argv);
  97                         } else {
  98                                 if (dest_exists) {
  99                                         if (dest_exists == 3) {
 100                                                 if (source_exists != 3) {
 101                                                         bb_error_msg(fmt, "", "non-");
 102                                                         goto RET_1;
 103                                                 }
 104                                         } else {
 105                                                 if (source_exists == 3) {
 106                                                         bb_error_msg(fmt, "non-", "");
 107                                                         goto RET_1;
 108                                                 }
 109                                         }
 110                                         if (unlink(dest) < 0) {
 111                                                 bb_perror_msg("cannot remove '%s'", dest);
 112                                                 goto RET_1;
 113                                         }
 114                                 }
 115                                 copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
 116 #if ENABLE_SELINUX
 117                                 copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
 118 #endif
 119                                 if ((copy_file(*argv, dest, copy_flag) >= 0)
 120                                  && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
 121                                 ) {
 122                                         goto RET_0;
 123                                 }
 124                         }
 125  RET_1:
 126                         status = 1;
 127                 }
 128  RET_0:
 129                 if (dest != last) {
 130                         free((void *) dest);
 131                 }
 132         } while (*++argv != last);
 133
 134         return status;
 135 }