2 Copyright (C) Andrew Tridgell 1996
3 Copyright (C) Paul Mackerras 1996
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /* this file contains code used by more than one part of the rsync
27 extern int daemon_log_format_has_i;
28 extern int preserve_times;
29 extern int omit_dir_times;
33 extern int am_generator;
34 extern int preserve_uid;
35 extern int preserve_gid;
36 extern int force_delete;
39 extern int max_delete;
40 extern int keep_dirlinks;
41 extern int make_backups;
42 extern struct stats stats;
43 extern char *backup_dir;
44 extern char *log_format;
45 extern char *backup_suffix;
46 extern int backup_suffix_len;
49 static int is_backup_file(char *fn)
51 int k = strlen(fn) - backup_suffix_len;
52 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
59 void free_sums(struct sum_struct *s)
61 if (s->sums) free(s->sums);
66 int deletion_count = 0; /* used to implement --max-delete */
69 * delete a file or directory. If force_delete is set then delete
72 int delete_file(char *fname, int mode, int flags)
80 if (max_delete && deletion_count >= max_delete)
85 if (make_backups && (backup_dir || !is_backup_file(fname)))
86 ok = make_backup(fname);
88 ok = robust_unlink(fname) == 0;
90 if ((verbose || log_format) && !(flags & DEL_TERSE))
91 log_delete(fname, mode);
97 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
102 zap_dir = (flags & DEL_FORCE_RECURSE || (force_delete && recurse))
103 && !(flags & DEL_NO_RECURSE);
104 if (dry_run && zap_dir)
106 else if (do_rmdir(fname) == 0) {
107 if ((verbose || log_format) && !(flags & DEL_TERSE))
108 log_delete(fname, mode);
114 if (!zap_dir || (errno != ENOTEMPTY && errno != EEXIST)) {
115 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
120 /* now we do a recsursive delete on the directory ... */
121 if (!(d = opendir(fname))) {
122 rsyserr(FERROR, errno, "delete_file: opendir %s failed",
127 if (!(flags & DEL_TERSE)) {
128 if (verbose || log_format)
129 log_delete(fname, mode);
133 for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
134 char *dname = d_name(di);
135 if (dname[0] == '.' && (dname[1] == '\0'
136 || (dname[1] == '.' && dname[2] == '\0')))
138 pathjoin(buf, sizeof buf, fname, dname);
140 if (do_lstat(buf, &st) < 0)
142 if (verbose || log_format)
143 log_delete(buf, st.st_mode);
144 if (delete_file(buf, st.st_mode, flags) != 0) {
150 rsyserr(FERROR, errno, "delete_file: readdir %s failed",
158 if (max_delete && deletion_count >= max_delete)
160 if (do_rmdir(fname) != 0 && errno != ENOENT) {
161 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
170 int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
175 int change_uid, change_gid;
180 if (link_stat(fname, &st2, 0) < 0) {
181 rsyserr(FERROR, errno, "stat %s failed",
188 if (!preserve_times || S_ISLNK(st->st_mode)
189 || (S_ISDIR(st->st_mode)
190 && (omit_dir_times || (make_backups && !backup_dir))))
191 flags |= PERMS_SKIP_MTIME;
192 if (!(flags & PERMS_SKIP_MTIME)
193 && cmp_modtime(st->st_mtime, file->modtime) != 0) {
194 if (set_modtime(fname,file->modtime) != 0) {
195 rsyserr(FERROR, errno, "failed to set times on %s",
202 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
203 change_gid = preserve_gid && file->gid != GID_NONE
204 && st->st_gid != file->gid;
205 #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK
206 if (S_ISLNK(st->st_mode))
210 if (change_uid || change_gid) {
214 "set uid of %s from %ld to %ld\n",
216 (long)st->st_uid, (long)file->uid);
220 "set gid of %s from %ld to %ld\n",
222 (long)st->st_gid, (long)file->gid);
226 change_uid ? file->uid : st->st_uid,
227 change_gid ? file->gid : st->st_gid) != 0) {
228 /* shouldn't have attempted to change uid or gid
229 * unless have the privilege */
230 rsyserr(FERROR, errno, "%s %s failed",
231 change_uid ? "chown" : "chgrp",
235 /* a lchown had been done - we have to re-stat if the
236 * destination had the setuid or setgid bits set due
237 * to the side effect of the chown call */
238 if (st->st_mode & (S_ISUID | S_ISGID)) {
240 keep_dirlinks && S_ISDIR(st->st_mode));
246 if (!S_ISLNK(st->st_mode)) {
247 if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) {
249 if (do_chmod(fname,(file->mode & CHMOD_BITS)) != 0) {
250 rsyserr(FERROR, errno, "failed to set permissions on %s",
258 if (verbose > 1 && flags & PERMS_REPORT) {
259 enum logcode code = daemon_log_format_has_i || dry_run
262 rprintf(code, "%s\n", safe_fname(fname));
264 rprintf(code, "%s is uptodate\n", safe_fname(fname));
272 /* KLUGE: if the user hits Ctrl-C while ssh is prompting
273 * for a password, then our cleanup's sending of a SIGUSR1
274 * signal to all our children may kill ssh before it has a
275 * chance to restore the tty settings (i.e. turn echo back
276 * on). By sleeping for a short time, ssh gets a bigger
277 * chance to do the right thing. If child processes are
278 * not ssh waiting for a password, then this tiny delay
279 * shouldn't hurt anything. */
281 exit_cleanup(RERR_SIGNAL);
285 /* finish off a file transfer, renaming the file and setting the permissions
287 void finish_transfer(char *fname, char *fnametmp, struct file_struct *file,
288 int ok_to_set_time, int overwriting_basis)
294 rprintf(FINFO, "finishing %s\n", safe_fname(fname));
298 if (make_backups && overwriting_basis && !make_backup(fname))
301 /* Change permissions before putting the file into place. */
302 set_perms(fnametmp, file, NULL, ok_to_set_time ? 0 : PERMS_SKIP_MTIME);
304 /* move tmp file over real file */
306 rprintf(FINFO, "renaming %s to %s\n",
307 safe_fname(fnametmp), safe_fname(fname));
309 ret = robust_rename(fnametmp, fname, file->mode & INITACCESSPERMS);
311 rsyserr(FERROR, errno, "%s %s -> \"%s\"",
312 ret == -2 ? "copy" : "rename",
313 full_fname(fnametmp), safe_fname(fname));
318 /* The file was moved into place (not copied), so it's done. */
322 set_perms(fname, file, NULL, ok_to_set_time ? 0 : PERMS_SKIP_MTIME);
325 const char *who_am_i(void)
328 return am_server ? "server" : "client";
329 return am_sender ? "sender" : am_generator ? "generator" : "receiver";