blob: f127dfabd1a793abe89e35bffae38170bdc1ab6b
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 | |
11 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) |
12 | * |
13 | * Size reduction and improved error checking. |
14 | */ |
15 | |
16 | #include "libbb.h" |
17 | #include "libcoreutils/coreutils.h" |
18 | |
19 | //usage:#define mv_trivial_usage |
20 | //usage: "[-fin] SOURCE DEST\n" |
21 | //usage: "or: mv [-fin] SOURCE... DIRECTORY" |
22 | //usage:#define mv_full_usage "\n\n" |
23 | //usage: "Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY\n" |
24 | //usage: "\n -f Don't prompt before overwriting" |
25 | //usage: "\n -i Interactive, prompt before overwrite" |
26 | //usage: "\n -n Don't overwrite an existing file" |
27 | //usage: |
28 | //usage:#define mv_example_usage |
29 | //usage: "$ mv /tmp/foo /bin/bar\n" |
30 | |
31 | #if ENABLE_FEATURE_MV_LONG_OPTIONS |
32 | static const char mv_longopts[] ALIGN1 = |
33 | "interactive\0" No_argument "i" |
34 | "force\0" No_argument "f" |
35 | "no-clobber\0" No_argument "n" |
36 | "verbose\0" No_argument "v" |
37 | ; |
38 | #endif |
39 | |
40 | #define OPT_FORCE (1 << 0) |
41 | #define OPT_INTERACTIVE (1 << 1) |
42 | #define OPT_NOCLOBBER (1 << 2) |
43 | |
44 | int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
45 | int mv_main(int argc, char **argv) |
46 | { |
47 | struct stat dest_stat; |
48 | const char *last; |
49 | const char *dest; |
50 | unsigned flags; |
51 | int dest_exists; |
52 | int status = 0; |
53 | int copy_flag = 0; |
54 | |
55 | #if ENABLE_FEATURE_MV_LONG_OPTIONS |
56 | applet_long_options = mv_longopts; |
57 | #endif |
58 | /* Need at least two arguments. |
59 | * If more than one of -f, -i, -n is specified , only the final one |
60 | * takes effect (it unsets previous options). |
61 | * -v is accepted but ignored. |
62 | */ |
63 | opt_complementary = "-2:f-in:i-fn:n-fi"; |
64 | flags = getopt32(argv, "finv"); |
65 | argc -= optind; |
66 | argv += optind; |
67 | last = argv[argc - 1]; |
68 | |
69 | if (argc == 2) { |
70 | dest_exists = cp_mv_stat(last, &dest_stat); |
71 | if (dest_exists < 0) { |
72 | return EXIT_FAILURE; |
73 | } |
74 | |
75 | if (!(dest_exists & 2)) { /* last is not a directory */ |
76 | dest = last; |
77 | goto DO_MOVE; |
78 | } |
79 | } |
80 | |
81 | do { |
82 | dest = concat_path_file(last, bb_get_last_path_component_strip(*argv)); |
83 | dest_exists = cp_mv_stat(dest, &dest_stat); |
84 | if (dest_exists < 0) { |
85 | goto RET_1; |
86 | } |
87 | |
88 | DO_MOVE: |
89 | if (dest_exists) { |
90 | if (flags & OPT_NOCLOBBER) |
91 | goto RET_0; |
92 | if (!(flags & OPT_FORCE) |
93 | && ((access(dest, W_OK) < 0 && isatty(0)) |
94 | || (flags & OPT_INTERACTIVE)) |
95 | ) { |
96 | if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) { |
97 | goto RET_1; /* Ouch! fprintf failed! */ |
98 | } |
99 | if (!bb_ask_confirmation()) { |
100 | goto RET_0; |
101 | } |
102 | } |
103 | } |
104 | |
105 | if (rename(*argv, dest) < 0) { |
106 | struct stat source_stat; |
107 | int source_exists; |
108 | |
109 | if (errno != EXDEV |
110 | || (source_exists = cp_mv_stat2(*argv, &source_stat, lstat)) < 1 |
111 | ) { |
112 | bb_perror_msg("can't rename '%s'", *argv); |
113 | } else { |
114 | static const char fmt[] ALIGN1 = |
115 | "can't overwrite %sdirectory with %sdirectory"; |
116 | |
117 | if (dest_exists) { |
118 | if (dest_exists == 3) { |
119 | if (source_exists != 3) { |
120 | bb_error_msg(fmt, "", "non-"); |
121 | goto RET_1; |
122 | } |
123 | } else { |
124 | if (source_exists == 3) { |
125 | bb_error_msg(fmt, "non-", ""); |
126 | goto RET_1; |
127 | } |
128 | } |
129 | if (unlink(dest) < 0) { |
130 | bb_perror_msg("can't remove '%s'", dest); |
131 | goto RET_1; |
132 | } |
133 | } |
134 | /* FILEUTILS_RECUR also prevents nasties like |
135 | * "read from device and write contents to dst" |
136 | * instead of "create same device node" */ |
137 | copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS; |
138 | #if ENABLE_SELINUX |
139 | copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT; |
140 | #endif |
141 | if ((copy_file(*argv, dest, copy_flag) >= 0) |
142 | && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0) |
143 | ) { |
144 | goto RET_0; |
145 | } |
146 | } |
147 | RET_1: |
148 | status = 1; |
149 | } |
150 | RET_0: |
151 | if (dest != last) { |
152 | free((void *) dest); |
153 | } |
154 | } while (*++argv != last); |
155 | |
156 | return status; |
157 | } |
158 |