ae0ee92e49d345773f40300fb44372bb30f03cae
[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  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  *
21  */
22
23 /* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
24  *
25  * Size reduction and improved error checking.
26  */
27
28 #include <sys/types.h>
29 #include <sys/stat.h>
30 #include <unistd.h>
31 #include <dirent.h>
32 #include <errno.h>
33 #include <stdlib.h>
34 #include "busybox.h"
35 #include "libcoreutils/coreutils.h"
36
37 static const char *fmt = "cannot overwrite %sdirectory with %sdirectory";
38
39 extern int mv_main(int argc, char **argv)
40 {
41         struct stat source_stat;
42         struct stat dest_stat;
43         const char *last;
44         const char *dest;
45         int dest_exists;
46         int source_exists;
47         int opt;
48         int flags = 0;
49         int status = 0;
50
51         while ((opt = getopt(argc, argv, "fi")) > 0) {
52                 flags &= ~(FILEUTILS_INTERACTIVE | FILEUTILS_FORCE);
53                 if (opt == 'i') {
54                         flags |= FILEUTILS_INTERACTIVE;
55                 } else if (opt == 'f') {
56                         flags |= FILEUTILS_FORCE;
57                 } else {
58                         bb_show_usage();
59                 }
60         }
61
62         if (optind + 2 > argc)
63                 bb_show_usage();
64
65         last = argv[argc - 1];
66         argv += optind;
67
68         if (optind + 2 == argc) {
69                 if ((dest_exists = cp_mv_stat(last, &dest_stat)) < 0) {
70                         return 1;
71                 }
72
73                 if (!(dest_exists & 2)) {
74                         dest = last;
75                         goto DO_MOVE;
76                 }
77         }
78         
79         do {
80                 dest = concat_path_file(last,
81                                                                 bb_get_last_path_component(*argv));
82
83                 if ((dest_exists = cp_mv_stat(dest, &dest_stat)) < 0) {
84                         goto RET_1;
85                 }
86
87         DO_MOVE:
88                 
89                 if (dest_exists && !(flags & FILEUTILS_FORCE) &&
90                         ((access(dest, W_OK) < 0 && isatty(0)) ||
91                          (flags & FILEUTILS_INTERACTIVE))) {
92                                  if (fprintf(stderr, "mv: overwrite `%s'? ", dest) < 0) {
93                                          goto RET_1;    /* Ouch! fprintf failed! */
94                                  }
95                                  if (!bb_ask_confirmation())
96                                          goto RET_0;
97                  }
98                 
99                 if (rename(*argv, dest) < 0) {
100                         if (errno != EXDEV) {
101                                 bb_perror_msg("unable to rename `%s'", *argv);
102                         } else if ((source_exists = cp_mv_stat(*argv, &source_stat)) >= 0) {
103                                 if (dest_exists) {
104                                         if (dest_exists & 2) {
105                                                 if (!(source_exists & 2)) {
106                                                         bb_error_msg(fmt, "", "non-");
107                                                         goto RET_1;
108                                                 }
109                                         } else {
110                                                 if (source_exists & 2) {
111                                                         bb_error_msg(fmt, "non-", "");
112                                                         goto RET_1;
113                                                 }
114                                         }
115                                         if (unlink(dest) < 0) {
116                                                 bb_perror_msg("cannot remove `%s'", dest);
117                                                 goto RET_1;
118                                         }
119                                 }
120                                 
121                                 if ((copy_file(*argv, dest,
122                                                            FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS) >= 0)
123                                         && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
124                                         ) {
125                                         goto RET_0;
126                                 }
127                                 
128                         }
129                 RET_1:
130                         status = 1;
131                 }
132
133         RET_0:
134                 if (dest != last) {
135                         free((void *) dest);
136                 }
137                 
138         } while (*++argv != last);
139         
140         exit(status);
141 }