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 |