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);
  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         opt_complementary = "f-i:i-f";
  51         flags = getopt32(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                 dest_exists = cp_mv_stat(last, &dest_stat);
  61                 if (dest_exists < 0) {
  62                         return 1;
  63                 }
  64
  65                 if (!(dest_exists & 2)) {
  66                         dest = last;
  67                         goto DO_MOVE;
  68                 }
  69         }
  70
  71         do {
  72                 dest = concat_path_file(last, bb_get_last_path_component(*argv));
  73                 dest_exists = cp_mv_stat(dest, &dest_stat);
  74                 if (dest_exists < 0) {
  75                         goto RET_1;
  76                 }
  77
  78 DO_MOVE:
  79
  80                 if (dest_exists && !(flags & OPT_FILEUTILS_FORCE) &&
  81                         ((access(dest, W_OK) < 0 && isatty(0)) ||
  82                         (flags & OPT_FILEUTILS_INTERACTIVE))) {
  83                         if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
  84                                 goto RET_1;     /* Ouch! fprintf failed! */
  85                         }
  86                         if (!bb_ask_confirmation()) {
  87                                 goto RET_0;
  88                         }
  89                 }
  90                 if (rename(*argv, dest) < 0) {
  91                         struct stat source_stat;
  92                         int source_exists;
  93
  94                         if (errno != EXDEV ||
  95                                 (source_exists = cp_mv_stat(*argv, &source_stat)) < 1) {
  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                                         goto RET_0;
 122                                 }
 123                         }
 124 RET_1:
 125                         status = 1;
 126                 }
 127 RET_0:
 128                 if (dest != last) {
 129                         free((void *) dest);
 130                 }
 131         } while (*++argv != last);
 132
 133         return status;
 134 }