| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini mv implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
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| 6 | * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
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| 7 | *
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| 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 9 | */
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| 10 |
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| 11 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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| 12 | *
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| 13 | * Size reduction and improved error checking.
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| 14 | */
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| 15 |
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| 16 | #include "libbb.h"
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| 17 | #include "libcoreutils/coreutils.h"
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| 18 |
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| 19 | //usage:#define mv_trivial_usage
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| 20 | //usage: "[-fin] SOURCE DEST\n"
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| 21 | //usage: "or: mv [-fin] SOURCE... DIRECTORY"
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| 22 | //usage:#define mv_full_usage "\n\n"
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| 23 | //usage: "Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY\n"
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| 24 | //usage: "\n -f Don't prompt before overwriting"
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| 25 | //usage: "\n -i Interactive, prompt before overwrite"
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| 26 | //usage: "\n -n Don't overwrite an existing file"
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| 27 | //usage:
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| 28 | //usage:#define mv_example_usage
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| 29 | //usage: "$ mv /tmp/foo /bin/bar\n"
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| 30 |
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| 31 | #if ENABLE_FEATURE_MV_LONG_OPTIONS
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| 32 | static const char mv_longopts[] ALIGN1 =
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| 33 | "interactive\0" No_argument "i"
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| 34 | "force\0" No_argument "f"
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| 35 | "no-clobber\0" No_argument "n"
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| 36 | "verbose\0" No_argument "v"
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| 37 | ;
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| 38 | #endif
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| 39 |
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| 40 | #define OPT_FORCE (1 << 0)
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| 41 | #define OPT_INTERACTIVE (1 << 1)
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| 42 | #define OPT_NOCLOBBER (1 << 2)
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| 43 |
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| 44 | int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 45 | int mv_main(int argc, char **argv)
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| 46 | {
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| 47 | struct stat dest_stat;
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| 48 | const char *last;
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| 49 | const char *dest;
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| 50 | unsigned flags;
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| 51 | int dest_exists;
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| 52 | int status = 0;
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| 53 | int copy_flag = 0;
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| 54 |
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| 55 | #if ENABLE_FEATURE_MV_LONG_OPTIONS
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| 56 | applet_long_options = mv_longopts;
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| 57 | #endif
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| 58 | /* Need at least two arguments.
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| 59 | * If more than one of -f, -i, -n is specified , only the final one
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| 60 | * takes effect (it unsets previous options).
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| 61 | * -v is accepted but ignored.
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| 62 | */
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| 63 | opt_complementary = "-2:f-in:i-fn:n-fi";
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| 64 | flags = getopt32(argv, "finv");
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| 65 | argc -= optind;
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| 66 | argv += optind;
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| 67 | last = argv[argc - 1];
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| 68 |
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| 69 | if (argc == 2) {
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| 70 | dest_exists = cp_mv_stat(last, &dest_stat);
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| 71 | if (dest_exists < 0) {
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| 72 | return EXIT_FAILURE;
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| 73 | }
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| 74 |
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| 75 | if (!(dest_exists & 2)) { /* last is not a directory */
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| 76 | dest = last;
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| 77 | goto DO_MOVE;
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| 78 | }
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| 79 | }
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| 80 |
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| 81 | do {
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| 82 | dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
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| 83 | dest_exists = cp_mv_stat(dest, &dest_stat);
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| 84 | if (dest_exists < 0) {
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| 85 | goto RET_1;
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| 86 | }
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| 87 |
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| 88 | DO_MOVE:
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| 89 | if (dest_exists) {
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| 90 | if (flags & OPT_NOCLOBBER)
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| 91 | goto RET_0;
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| 92 | if (!(flags & OPT_FORCE)
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| 93 | && ((access(dest, W_OK) < 0 && isatty(0))
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| 94 | || (flags & OPT_INTERACTIVE))
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| 95 | ) {
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| 96 | if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
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| 97 | goto RET_1; /* Ouch! fprintf failed! */
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| 98 | }
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| 99 | if (!bb_ask_confirmation()) {
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| 100 | goto RET_0;
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| 101 | }
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| 102 | }
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| 103 | }
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| 104 |
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| 105 | if (rename(*argv, dest) < 0) {
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| 106 | struct stat source_stat;
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| 107 | int source_exists;
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| 108 |
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| 109 | if (errno != EXDEV
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| 110 | || (source_exists = cp_mv_stat2(*argv, &source_stat, lstat)) < 1
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| 111 | ) {
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| 112 | bb_perror_msg("can't rename '%s'", *argv);
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| 113 | } else {
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| 114 | static const char fmt[] ALIGN1 =
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| 115 | "can't overwrite %sdirectory with %sdirectory";
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| 116 |
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| 117 | if (dest_exists) {
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| 118 | if (dest_exists == 3) {
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| 119 | if (source_exists != 3) {
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| 120 | bb_error_msg(fmt, "", "non-");
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| 121 | goto RET_1;
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| 122 | }
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| 123 | } else {
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| 124 | if (source_exists == 3) {
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| 125 | bb_error_msg(fmt, "non-", "");
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| 126 | goto RET_1;
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| 127 | }
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| 128 | }
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| 129 | if (unlink(dest) < 0) {
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| 130 | bb_perror_msg("can't remove '%s'", dest);
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| 131 | goto RET_1;
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| 132 | }
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| 133 | }
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| 134 | /* FILEUTILS_RECUR also prevents nasties like
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| 135 | * "read from device and write contents to dst"
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| 136 | * instead of "create same device node" */
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| 137 | copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
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| 138 | #if ENABLE_SELINUX
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| 139 | copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
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| 140 | #endif
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| 141 | if ((copy_file(*argv, dest, copy_flag) >= 0)
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| 142 | && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
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| 143 | ) {
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| 144 | goto RET_0;
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| 145 | }
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| 146 | }
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| 147 | RET_1:
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| 148 | status = 1;
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| 149 | }
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| 150 | RET_0:
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| 151 | if (dest != last) {
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| 152 | free((void *) dest);
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| 153 | }
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| 154 | } while (*++argv != last);
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| 155 |
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| 156 | return status;
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| 157 | }
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