dhcpd,dumpleases: write and use 64-bit current time in lease file.
[oweals/busybox.git] / coreutils / mv.c
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 tarball for details.
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 #if ENABLE_FEATURE_MV_LONG_OPTIONS
20 static const char mv_longopts[] ALIGN1 =
21         "interactive\0" No_argument "i"
22         "force\0"       No_argument "f"
23         ;
24 #endif
25
26 #define OPT_FILEUTILS_FORCE       1
27 #define OPT_FILEUTILS_INTERACTIVE 2
28
29 int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
30 int mv_main(int argc, char **argv)
31 {
32         struct stat dest_stat;
33         const char *last;
34         const char *dest;
35         unsigned flags;
36         int dest_exists;
37         int status = 0;
38         int copy_flag = 0;
39
40 #if ENABLE_FEATURE_MV_LONG_OPTIONS
41         applet_long_options = mv_longopts;
42 #endif
43         // Need at least two arguments
44         // -f unsets -i, -i unsets -f
45         opt_complementary = "-2:f-i:i-f";
46         flags = getopt32(argv, "fi");
47         argc -= optind;
48         argv += optind;
49         last = argv[argc - 1];
50
51         if (argc == 2) {
52                 dest_exists = cp_mv_stat(last, &dest_stat);
53                 if (dest_exists < 0) {
54                         return EXIT_FAILURE;
55                 }
56
57                 if (!(dest_exists & 2)) { /* last is not a directory */
58                         dest = last;
59                         goto DO_MOVE;
60                 }
61         }
62
63         do {
64                 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
65                 dest_exists = cp_mv_stat(dest, &dest_stat);
66                 if (dest_exists < 0) {
67                         goto RET_1;
68                 }
69
70  DO_MOVE:
71                 if (dest_exists
72                  && !(flags & OPT_FILEUTILS_FORCE)
73                  && ((access(dest, W_OK) < 0 && isatty(0))
74                     || (flags & OPT_FILEUTILS_INTERACTIVE))
75                 ) {
76                         if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
77                                 goto RET_1;     /* Ouch! fprintf failed! */
78                         }
79                         if (!bb_ask_confirmation()) {
80                                 goto RET_0;
81                         }
82                 }
83                 if (rename(*argv, dest) < 0) {
84                         struct stat source_stat;
85                         int source_exists;
86
87                         if (errno != EXDEV
88                          || (source_exists = cp_mv_stat2(*argv, &source_stat, lstat)) < 1
89                         ) {
90                                 bb_perror_msg("cannot rename '%s'", *argv);
91                         } else {
92                                 static const char fmt[] ALIGN1 =
93                                         "cannot overwrite %sdirectory with %sdirectory";
94
95                                 if (dest_exists) {
96                                         if (dest_exists == 3) {
97                                                 if (source_exists != 3) {
98                                                         bb_error_msg(fmt, "", "non-");
99                                                         goto RET_1;
100                                                 }
101                                         } else {
102                                                 if (source_exists == 3) {
103                                                         bb_error_msg(fmt, "non-", "");
104                                                         goto RET_1;
105                                                 }
106                                         }
107                                         if (unlink(dest) < 0) {
108                                                 bb_perror_msg("cannot remove '%s'", dest);
109                                                 goto RET_1;
110                                         }
111                                 }
112                                 /* FILEUTILS_RECUR also prevents nasties like
113                                  * "read from device and write contents to dst"
114                                  * instead of "create same device node" */
115                                 copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
116 #if ENABLE_SELINUX
117                                 copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
118 #endif
119                                 if ((copy_file(*argv, dest, copy_flag) >= 0)
120                                  && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
121                                 ) {
122                                         goto RET_0;
123                                 }
124                         }
125  RET_1:
126                         status = 1;
127                 }
128  RET_0:
129                 if (dest != last) {
130                         free((void *) dest);
131                 }
132         } while (*++argv != last);
133
134         return status;
135 }