1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/* vi: set sw=4 ts=4: */
/*
* Mini copy_file implementation for busybox
*
*
* Copyright (C) 2001 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <utime.h>
#include <errno.h>
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include "libbb.h"
int copy_file(const char *source, const char *dest, int flags)
{
struct stat source_stat;
struct stat dest_stat;
int dest_exists = 1;
int status = 0;
if (((flags & FILEUTILS_PRESERVE_SYMLINKS) &&
lstat(source, &source_stat) < 0) ||
(!(flags & FILEUTILS_PRESERVE_SYMLINKS) &&
stat(source, &source_stat) < 0)) {
perror_msg("%s", source);
return -1;
}
if (stat(dest, &dest_stat) < 0) {
if (errno != ENOENT) {
perror_msg("unable to stat `%s'", dest);
return -1;
}
dest_exists = 0;
}
if (dest_exists && source_stat.st_rdev == dest_stat.st_rdev &&
source_stat.st_ino == dest_stat.st_ino) {
error_msg("`%s' and `%s' are the same file", source, dest);
return -1;
}
if (S_ISDIR(source_stat.st_mode)) {
DIR *dp;
struct dirent *d;
mode_t saved_umask = 0;
if (!(flags & FILEUTILS_RECUR)) {
error_msg("%s: omitting directory", source);
return -1;
}
/* Create DEST. */
if (dest_exists) {
if (!S_ISDIR(dest_stat.st_mode)) {
error_msg("`%s' is not a directory", dest);
return -1;
}
} else {
mode_t mode;
saved_umask = umask(0);
mode = source_stat.st_mode;
if (!(flags & FILEUTILS_PRESERVE_STATUS))
mode = source_stat.st_mode & ~saved_umask;
mode |= S_IRWXU;
if (mkdir(dest, mode) < 0) {
umask(saved_umask);
perror_msg("cannot create directory `%s'", dest);
return -1;
}
umask(saved_umask);
}
/* Recursively copy files in SOURCE. */
if ((dp = opendir(source)) == NULL) {
perror_msg("unable to open directory `%s'", source);
status = -1;
goto end;
}
while ((d = readdir(dp)) != NULL) {
char *new_source, *new_dest;
if (strcmp(d->d_name, ".") == 0 ||
strcmp(d->d_name, "..") == 0)
continue;
new_source = concat_path_file(source, d->d_name);
new_dest = concat_path_file(dest, d->d_name);
if (copy_file(new_source, new_dest, flags) < 0)
status = -1;
free(new_source);
free(new_dest);
}
/* ??? What if an error occurs in readdir? */
if (closedir(dp) < 0) {
perror_msg("unable to close directory `%s'", source);
status = -1;
}
if (!dest_exists &&
chmod(dest, source_stat.st_mode & ~saved_umask) < 0) {
perror_msg("unable to change permissions of `%s'", dest);
status = -1;
}
} else if (S_ISREG(source_stat.st_mode)) {
FILE *sfp, *dfp;
if (dest_exists) {
if ((dfp = fopen(dest, "w")) == NULL) {
if (!(flags & FILEUTILS_FORCE)) {
perror_msg("unable to open `%s'", dest);
return -1;
}
if (unlink(dest) < 0) {
perror_msg("unable to remove `%s'", dest);
return -1;
}
dest_exists = 0;
}
}
if (!dest_exists) {
int fd;
if ((fd = open(dest, O_WRONLY|O_CREAT, source_stat.st_mode)) < 0 ||
(dfp = fdopen(fd, "w")) == NULL) {
if (fd >= 0)
close(fd);
perror_msg("unable to open `%s'", dest);
return -1;
}
}
if ((sfp = fopen(source, "r")) == NULL) {
fclose(dfp);
perror_msg("unable to open `%s'", source);
status = -1;
goto end;
}
if (copy_file_chunk(sfp, dfp, -1) < 0)
status = -1;
if (fclose(dfp) < 0) {
perror_msg("unable to close `%s'", dest);
status = -1;
}
if (fclose(sfp) < 0) {
perror_msg("unable to close `%s'", source);
status = -1;
}
} else if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode) ||
S_ISSOCK(source_stat.st_mode)) {
if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
perror_msg("unable to create `%s'", dest);
return -1;
}
} else if (S_ISFIFO(source_stat.st_mode)) {
if (mkfifo(dest, source_stat.st_mode) < 0) {
perror_msg("cannot create fifo `%s'", dest);
return -1;
}
} else if (S_ISLNK(source_stat.st_mode)) {
char *lpath = xreadlink(source);
if (symlink(lpath, dest) < 0) {
perror_msg("cannot create symlink `%s'", dest);
return -1;
}
free(lpath);
#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
if (flags & FILEUTILS_PRESERVE_STATUS)
if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
perror_msg("unable to preserve ownership of `%s'", dest);
#endif
return 0;
} else {
error_msg("internal error: unrecognized file type");
return -1;
}
end:
if (flags & FILEUTILS_PRESERVE_STATUS) {
struct utimbuf times;
times.actime = source_stat.st_atime;
times.modtime = source_stat.st_mtime;
if (utime(dest, ×) < 0)
perror_msg("unable to preserve times of `%s'", dest);
if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
source_stat.st_mode &= ~(S_ISUID | S_ISGID);
perror_msg("unable to preserve ownership of `%s'", dest);
}
if (chmod(dest, source_stat.st_mode) < 0)
perror_msg("unable to preserve permissions of `%s'", dest);
}
return status;
}
|
