blob: 1cc318fd1a9ff3357223bee13312fe77b48db86f
| 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 source tree. |
| 9 | */ |
| 10 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) |
| 11 | * |
| 12 | * Size reduction and improved error checking. |
| 13 | */ |
| 14 | //config:config MV |
| 15 | //config: bool "mv" |
| 16 | //config: default y |
| 17 | //config: help |
| 18 | //config: mv is used to move or rename files or directories. |
| 19 | //config: |
| 20 | //config:config FEATURE_MV_LONG_OPTIONS |
| 21 | //config: bool "Enable long options" |
| 22 | //config: default y |
| 23 | //config: depends on MV && LONG_OPTS |
| 24 | //config: help |
| 25 | //config: Support long options for the mv applet. |
| 26 | |
| 27 | //applet:IF_MV(APPLET(mv, BB_DIR_BIN, BB_SUID_DROP)) |
| 28 | |
| 29 | //kbuild:lib-$(CONFIG_MV) += mv.o |
| 30 | |
| 31 | //usage:#define mv_trivial_usage |
| 32 | //usage: "[-fin] SOURCE DEST\n" |
| 33 | //usage: "or: mv [-fin] SOURCE... DIRECTORY" |
| 34 | //usage:#define mv_full_usage "\n\n" |
| 35 | //usage: "Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY\n" |
| 36 | //usage: "\n -f Don't prompt before overwriting" |
| 37 | //usage: "\n -i Interactive, prompt before overwrite" |
| 38 | //usage: "\n -n Don't overwrite an existing file" |
| 39 | //usage: |
| 40 | //usage:#define mv_example_usage |
| 41 | //usage: "$ mv /tmp/foo /bin/bar\n" |
| 42 | |
| 43 | #include "libbb.h" |
| 44 | #include "libcoreutils/coreutils.h" |
| 45 | |
| 46 | #if ENABLE_FEATURE_MV_LONG_OPTIONS |
| 47 | static const char mv_longopts[] ALIGN1 = |
| 48 | "interactive\0" No_argument "i" |
| 49 | "force\0" No_argument "f" |
| 50 | "no-clobber\0" No_argument "n" |
| 51 | IF_FEATURE_VERBOSE( |
| 52 | "verbose\0" No_argument "v" |
| 53 | ) |
| 54 | ; |
| 55 | #endif |
| 56 | |
| 57 | #define OPT_FORCE (1 << 0) |
| 58 | #define OPT_INTERACTIVE (1 << 1) |
| 59 | #define OPT_NOCLOBBER (1 << 2) |
| 60 | #define OPT_VERBOSE ((1 << 3) * ENABLE_FEATURE_VERBOSE) |
| 61 | |
| 62 | |
| 63 | int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 64 | int mv_main(int argc, char **argv) |
| 65 | { |
| 66 | struct stat dest_stat; |
| 67 | const char *last; |
| 68 | const char *dest; |
| 69 | unsigned flags; |
| 70 | int dest_exists; |
| 71 | int status = 0; |
| 72 | int copy_flag = 0; |
| 73 | |
| 74 | #if ENABLE_FEATURE_MV_LONG_OPTIONS |
| 75 | applet_long_options = mv_longopts; |
| 76 | #endif |
| 77 | /* Need at least two arguments. |
| 78 | * If more than one of -f, -i, -n is specified , only the final one |
| 79 | * takes effect (it unsets previous options). |
| 80 | */ |
| 81 | opt_complementary = "-2:f-in:i-fn:n-fi"; |
| 82 | flags = getopt32(argv, "finv"); |
| 83 | argc -= optind; |
| 84 | argv += optind; |
| 85 | last = argv[argc - 1]; |
| 86 | |
| 87 | if (argc == 2) { |
| 88 | dest_exists = cp_mv_stat(last, &dest_stat); |
| 89 | if (dest_exists < 0) { |
| 90 | return EXIT_FAILURE; |
| 91 | } |
| 92 | |
| 93 | if (!(dest_exists & 2)) { /* last is not a directory */ |
| 94 | dest = last; |
| 95 | goto DO_MOVE; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | do { |
| 100 | dest = concat_path_file(last, bb_get_last_path_component_strip(*argv)); |
| 101 | dest_exists = cp_mv_stat(dest, &dest_stat); |
| 102 | if (dest_exists < 0) { |
| 103 | goto RET_1; |
| 104 | } |
| 105 | |
| 106 | DO_MOVE: |
| 107 | if (dest_exists) { |
| 108 | if (flags & OPT_NOCLOBBER) |
| 109 | goto RET_0; |
| 110 | if (!(flags & OPT_FORCE) |
| 111 | && ((access(dest, W_OK) < 0 && isatty(0)) |
| 112 | || (flags & OPT_INTERACTIVE)) |
| 113 | ) { |
| 114 | if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) { |
| 115 | goto RET_1; /* Ouch! fprintf failed! */ |
| 116 | } |
| 117 | if (!bb_ask_confirmation()) { |
| 118 | goto RET_0; |
| 119 | } |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | if (rename(*argv, dest) < 0) { |
| 124 | struct stat source_stat; |
| 125 | int source_exists; |
| 126 | |
| 127 | if (errno != EXDEV |
| 128 | || (source_exists = cp_mv_stat2(*argv, &source_stat, lstat)) < 1 |
| 129 | ) { |
| 130 | bb_perror_msg("can't rename '%s'", *argv); |
| 131 | } else { |
| 132 | static const char fmt[] ALIGN1 = |
| 133 | "can't overwrite %sdirectory with %sdirectory"; |
| 134 | |
| 135 | if (dest_exists) { |
| 136 | if (dest_exists == 3) { |
| 137 | if (source_exists != 3) { |
| 138 | bb_error_msg(fmt, "", "non-"); |
| 139 | goto RET_1; |
| 140 | } |
| 141 | } else { |
| 142 | if (source_exists == 3) { |
| 143 | bb_error_msg(fmt, "non-", ""); |
| 144 | goto RET_1; |
| 145 | } |
| 146 | } |
| 147 | if (unlink(dest) < 0) { |
| 148 | bb_perror_msg("can't remove '%s'", dest); |
| 149 | goto RET_1; |
| 150 | } |
| 151 | } |
| 152 | /* FILEUTILS_RECUR also prevents nasties like |
| 153 | * "read from device and write contents to dst" |
| 154 | * instead of "create same device node" */ |
| 155 | copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS; |
| 156 | #if ENABLE_SELINUX |
| 157 | copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT; |
| 158 | #endif |
| 159 | if ((copy_file(*argv, dest, copy_flag) >= 0) |
| 160 | && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0) |
| 161 | ) { |
| 162 | goto RET_0; |
| 163 | } |
| 164 | } |
| 165 | RET_1: |
| 166 | status = 1; |
| 167 | } |
| 168 | RET_0: |
| 169 | if (flags & OPT_VERBOSE) { |
| 170 | printf("'%s' -> '%s'\n", *argv, dest); |
| 171 | } |
| 172 | if (dest != last) { |
| 173 | free((void *) dest); |
| 174 | } |
| 175 | } while (*++argv != last); |
| 176 | |
| 177 | return status; |
| 178 | } |
| 179 |