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 <unistd.h>
  19 #include <dirent.h>
  20 #include <errno.h>
  21 #include <stdlib.h>
  22 #include <getopt.h> /* struct option */
  23 #include "busybox.h"
  24 #include "libcoreutils/coreutils.h"
  25
  26 #if ENABLE_FEATURE_MV_LONG_OPTIONS
  27 static const struct option mv_long_options[] = {
  28         { "interactive", 0, NULL, 'i' },
  29         { "force", 0, NULL, 'f' },
  30         { 0, 0, 0, 0 }
  31 };
  32 #endif
  33
  34 #define OPT_FILEUTILS_FORCE       1
  35 #define OPT_FILEUTILS_INTERACTIVE 2
  36
  37 static const char fmt[] = "cannot overwrite %sdirectory with %sdirectory";
  38
  39 int mv_main(int argc, char **argv);
  40 int mv_main(int argc, char **argv)
  41 {
  42         struct stat dest_stat;
  43         const char *last;
  44         const char *dest;
  45         unsigned long flags;
  46         int dest_exists;
  47         int status = 0;
  48         int copy_flag = 0;
  49
  50 #if ENABLE_FEATURE_MV_LONG_OPTIONS
  51         applet_long_options = mv_long_options;
  52 #endif
  53         opt_complementary = "f-i:i-f";
  54         flags = getopt32(argc, argv, "fi");
  55         if (optind + 2 > argc) {
  56                 bb_show_usage();
  57         }
  58
  59         last = argv[argc - 1];
  60         argv += optind;
  61
  62         if (optind + 2 == argc) {
  63                 dest_exists = cp_mv_stat(last, &dest_stat);
  64                 if (dest_exists < 0) {
  65                         return 1;
  66                 }
  67
  68                 if (!(dest_exists & 2)) {
  69                         dest = last;
  70                         goto DO_MOVE;
  71                 }
  72         }
  73
  74         do {
  75                 dest = concat_path_file(last, bb_get_last_path_component(*argv));
  76                 dest_exists = cp_mv_stat(dest, &dest_stat);
  77                 if (dest_exists < 0) {
  78                         goto RET_1;
  79                 }
  80
  81 DO_MOVE:
  82
  83                 if (dest_exists && !(flags & OPT_FILEUTILS_FORCE) &&
  84                         ((access(dest, W_OK) < 0 && isatty(0)) ||
  85                         (flags & OPT_FILEUTILS_INTERACTIVE))) {
  86                         if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
  87                                 goto RET_1;     /* Ouch! fprintf failed! */
  88                         }
  89                         if (!bb_ask_confirmation()) {
  90                                 goto RET_0;
  91                         }
  92                 }
  93                 if (rename(*argv, dest) < 0) {
  94                         struct stat source_stat;
  95                         int source_exists;
  96
  97                         if (errno != EXDEV ||
  98                                 (source_exists = cp_mv_stat(*argv, &source_stat)) < 1) {
  99                                 bb_perror_msg("cannot rename '%s'", *argv);
 100                         } else {
 101                                 if (dest_exists) {
 102                                         if (dest_exists == 3) {
 103                                                 if (source_exists != 3) {
 104                                                         bb_error_msg(fmt, "", "non-");
 105                                                         goto RET_1;
 106                                                 }
 107                                         } else {
 108                                                 if (source_exists == 3) {
 109                                                         bb_error_msg(fmt, "non-", "");
 110                                                         goto RET_1;
 111                                                 }
 112                                         }
 113                                         if (unlink(dest) < 0) {
 114                                                 bb_perror_msg("cannot remove '%s'", dest);
 115                                                 goto RET_1;
 116                                         }
 117                                 }
 118                                 copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
 119 #if ENABLE_SELINUX
 120                                 copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
 121 #endif
 122                                 if ((copy_file(*argv, dest, copy_flag) >= 0) &&
 123                                         (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)) {
 124                                         goto RET_0;
 125                                 }
 126                         }
 127 RET_1:
 128                         status = 1;
 129                 }
 130 RET_0:
 131                 if (dest != last) {
 132                         free((void *) dest);
 133                 }
 134         } while (*++argv != last);
 135
 136         return status;
 137 }