1 /* vi: set sw=4 ts=4: */
3 * Mini copy_file implementation for busybox
6 * Copyright (C) 2001 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <sys/types.h>
36 int copy_file(const char *source, const char *dest, int flags)
38 struct stat source_stat;
39 struct stat dest_stat;
43 if (((flags & FILEUTILS_PRESERVE_SYMLINKS) &&
44 lstat(source, &source_stat) < 0) ||
45 (!(flags & FILEUTILS_PRESERVE_SYMLINKS) &&
46 stat(source, &source_stat) < 0)) {
47 perror_msg("%s", source);
51 if (stat(dest, &dest_stat) < 0) {
52 if (errno != ENOENT) {
53 perror_msg("unable to stat `%s'", dest);
59 if (dest_exists && source_stat.st_rdev == dest_stat.st_rdev &&
60 source_stat.st_ino == dest_stat.st_ino) {
61 error_msg("`%s' and `%s' are the same file", source, dest);
65 if (S_ISDIR(source_stat.st_mode)) {
68 mode_t saved_umask = 0;
70 if (!(flags & FILEUTILS_RECUR)) {
71 error_msg("%s: omitting directory", source);
77 if (!S_ISDIR(dest_stat.st_mode)) {
78 error_msg("`%s' is not a directory", dest);
83 saved_umask = umask(0);
85 mode = source_stat.st_mode;
86 if (!(flags & FILEUTILS_PRESERVE_STATUS))
87 mode = source_stat.st_mode & ~saved_umask;
90 if (mkdir(dest, mode) < 0) {
92 perror_msg("cannot create directory `%s'",
100 /* Recursively copy files in SOURCE. */
101 if ((dp = opendir(source)) == NULL) {
102 perror_msg("unable to open directory `%s'", source);
107 while ((d = readdir(dp)) != NULL) {
108 char *new_source, *new_dest;
110 if (strcmp(d->d_name, ".") == 0 ||
111 strcmp(d->d_name, "..") == 0)
114 new_source = concat_path_file(source, d->d_name);
115 new_dest = concat_path_file(dest, d->d_name);
116 if (copy_file(new_source, new_dest, flags) < 0)
122 /* ??? What if an error occurs in readdir? */
124 if (closedir(dp) < 0) {
125 perror_msg("unable to close directory `%s'", source);
130 chmod(dest, source_stat.st_mode & ~saved_umask) < 0) {
131 perror_msg("unable to change permissions of `%s'",
135 } else if (S_ISREG(source_stat.st_mode)) {
139 if ((dfp = fopen(dest, "w")) == NULL) {
140 if (!(flags & FILEUTILS_FORCE)) {
141 perror_msg("unable to open `%s'", dest);
145 if (unlink(dest) < 0) {
146 perror_msg("unable to remove `%s'",
159 open(dest, O_WRONLY | O_CREAT,
160 source_stat.st_mode)) < 0
161 || (dfp = fdopen(fd, "w")) == NULL) {
164 perror_msg("unable to open `%s'", dest);
169 if ((sfp = fopen(source, "r")) == NULL) {
171 perror_msg("unable to open `%s'", source);
176 if (copy_file_chunk(sfp, dfp, -1) < 0)
179 if (fclose(dfp) < 0) {
180 perror_msg("unable to close `%s'", dest);
184 if (fclose(sfp) < 0) {
185 perror_msg("unable to close `%s'", source);
188 } else if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode)
189 || S_ISSOCK(source_stat.st_mode)) {
190 if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
191 perror_msg("unable to create `%s'", dest);
194 } else if (S_ISFIFO(source_stat.st_mode)) {
195 if (mkfifo(dest, source_stat.st_mode) < 0) {
196 perror_msg("cannot create fifo `%s'", dest);
199 } else if (S_ISLNK(source_stat.st_mode)) {
200 char *lpath = xreadlink(source);
201 if (symlink(lpath, dest) < 0) {
202 perror_msg("cannot create symlink `%s'", dest);
207 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
208 if (flags & FILEUTILS_PRESERVE_STATUS)
209 if (lchown(dest, source_stat.st_uid, source_stat.st_gid)
212 ("unable to preserve ownership of `%s'",
217 error_msg("internal error: unrecognized file type");
223 if (flags & FILEUTILS_PRESERVE_STATUS) {
224 struct utimbuf times;
226 times.actime = source_stat.st_atime;
227 times.modtime = source_stat.st_mtime;
228 if (utime(dest, ×) < 0)
229 perror_msg("unable to preserve times of `%s'", dest);
230 if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
231 source_stat.st_mode &= ~(S_ISUID | S_ISGID);
232 perror_msg("unable to preserve ownership of `%s'",
235 if (chmod(dest, source_stat.st_mode) < 0)
236 perror_msg("unable to preserve permissions of `%s'",