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 (10 kb)"
16 //config: default y
17 //config: help
18 //config: mv is used to move or rename files or directories.
19
20 //applet:IF_MV(APPLET_NOEXEC(mv, mv, BB_DIR_BIN, BB_SUID_DROP, mv))
21 /* NOEXEC despite cases when it can be a "runner" (mv LARGE_DIR OTHER_FS) */
22
23 //kbuild:lib-$(CONFIG_MV) += mv.o
24
25 //usage:#define mv_trivial_usage
26 //usage: "[-finT] SOURCE DEST\n"
27 //usage: "or: mv [-fin] SOURCE... { -t DIRECTORY | DIRECTORY }"
28 //usage:#define mv_full_usage "\n\n"
29 //usage: "Rename SOURCE to DEST, or move SOURCEs to DIRECTORY\n"
30 //usage: "\n -f Don't prompt before overwriting"
31 //usage: "\n -i Interactive, prompt before overwrite"
32 //usage: "\n -n Don't overwrite an existing file"
33 //usage: "\n -T Refuse to move if DEST is a directory"
34 //usage: "\n -t DIR Move all SOURCEs into DIR"
35 //usage:
36 //usage:#define mv_example_usage
37 //usage: "$ mv /tmp/foo /bin/bar\n"
38
39 #include "libbb.h"
40 #include "libcoreutils/coreutils.h"
41
42 int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
mv_main(int argc,char ** argv)43 int mv_main(int argc, char **argv)
44 {
45 struct stat statbuf;
46 const char *last;
47 const char *dest;
48 unsigned flags;
49 int dest_exists;
50 int status = 0;
51 int copy_flag = 0;
52
53 #define OPT_FORCE (1 << 0)
54 #define OPT_INTERACTIVE (1 << 1)
55 #define OPT_NOCLOBBER (1 << 2)
56 #define OPT_DESTNOTDIR (1 << 3)
57 #define OPT_DESTDIR (1 << 4)
58 #define OPT_VERBOSE ((1 << 5) * ENABLE_FEATURE_VERBOSE)
59 flags = getopt32long(argv, "^"
60 "finTt:v"
61 "\0"
62 /* At least one argument. (Usually two+, but -t DIR can have only one) */
63 "-1"
64 /* only the final one of -f, -i, -n takes effect */
65 ":f-in:i-fn:n-fi"
66 /* -t and -T don't mix */
67 ":t--T:T--t",
68 "interactive\0" No_argument "i"
69 "force\0" No_argument "f"
70 "no-clobber\0" No_argument "n"
71 "no-target-directory\0" No_argument "T"
72 "target-directory\0" Required_argument "t"
73 IF_FEATURE_VERBOSE(
74 "verbose\0" No_argument "v",
75 &last
76 )
77 );
78 argc -= optind;
79 argv += optind;
80
81 if (!(flags & OPT_DESTDIR)) {
82 last = argv[argc - 1];
83 if (argc < 2)
84 bb_show_usage();
85 if (argc != 2) {
86 if (flags & OPT_DESTNOTDIR)
87 bb_show_usage();
88 /* "mv A B C... DIR" - target must be dir */
89 } else /* argc == 2 */ {
90 /* "mv A B" - only case where target can be not a dir */
91 dest_exists = cp_mv_stat(last, &statbuf);
92 if (dest_exists < 0) { /* error other than ENOENT */
93 return EXIT_FAILURE;
94 }
95 if (!(dest_exists & 2)) {
96 /* last is not a directory */
97 dest = last;
98 goto DO_MOVE;
99 }
100 /* last is a directory */
101 if (flags & OPT_DESTNOTDIR) {
102 if (stat(argv[0], &statbuf) == 0 && !S_ISDIR(statbuf.st_mode))
103 bb_error_msg_and_die("'%s' is a directory", last);
104 /* "mv -T DIR1 DIR2" is allowed (renames a dir) */
105 dest = last;
106 goto DO_MOVE;
107 }
108 /* else: fall through into "do { move SRC to DIR/SRC } while" loop */
109 }
110 }
111 /* else: last is DIR from "-t DIR" */
112
113 do {
114 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
115 dest_exists = cp_mv_stat(dest, &statbuf);
116 if (dest_exists < 0) {
117 goto RET_1;
118 }
119
120 DO_MOVE:
121 if (dest_exists) {
122 if (flags & OPT_NOCLOBBER)
123 goto RET_0;
124 if (!(flags & OPT_FORCE)
125 && ((access(dest, W_OK) < 0 && isatty(0))
126 || (flags & OPT_INTERACTIVE))
127 ) {
128 if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
129 goto RET_1; /* Ouch! fprintf failed! */
130 }
131 if (!bb_ask_y_confirmation()) {
132 goto RET_0;
133 }
134 }
135 }
136
137 if (rename(*argv, dest) < 0) {
138 int source_exists;
139
140 if (errno != EXDEV
141 || (source_exists = cp_mv_stat2(*argv, &statbuf, lstat)) < 1
142 ) {
143 bb_perror_msg("can't rename '%s'", *argv);
144 } else {
145 static const char fmt[] ALIGN1 =
146 "can't overwrite %sdirectory with %sdirectory";
147
148 if (dest_exists) {
149 if (dest_exists == 3) {
150 if (source_exists != 3) {
151 bb_error_msg(fmt, "", "non-");
152 goto RET_1;
153 }
154 } else {
155 if (source_exists == 3) {
156 bb_error_msg(fmt, "non-", "");
157 goto RET_1;
158 }
159 }
160 if (unlink(dest) < 0) {
161 bb_perror_msg("can't remove '%s'", dest);
162 goto RET_1;
163 }
164 }
165 /* FILEUTILS_RECUR also prevents nasties like
166 * "read from device and write contents to dst"
167 * instead of "create same device node" */
168 copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
169 #if ENABLE_SELINUX
170 copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
171 #endif
172 if ((copy_file(*argv, dest, copy_flag) >= 0)
173 && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
174 ) {
175 goto RET_0;
176 }
177 }
178 RET_1:
179 status = 1;
180 }
181 RET_0:
182 if (flags & OPT_VERBOSE) {
183 printf("'%s' -> '%s'\n", *argv, dest);
184 }
185 if (dest != last) {
186 free((void *) dest);
187 }
188 } while (*++argv && *argv != last);
189
190 return status;
191 }
192