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_executability;
29 extern int preserve_times;
30 extern int omit_dir_times;
31 extern int orig_umask;
35 extern int am_generator;
36 extern int am_starting_up;
37 extern int preserve_uid;
38 extern int preserve_gid;
40 extern int keep_dirlinks;
41 extern int make_backups;
42 extern struct stats stats;
48 void free_sums(struct sum_struct *s)
50 if (s->sums) free(s->sums);
54 /* This is only called when we aren't preserving permissions. Figure out what
55 * the permissions should be and return them merged back into the mode. */
56 mode_t dest_mode(mode_t flist_mode, mode_t dest_mode, int exists)
58 /* If the file already exists we'll return the local permissions,
59 * possibly tweaked by the --executability option. */
61 if (preserve_executability && S_ISREG(flist_mode)) {
62 /* If the source file is executable, grant execute
63 * rights to everyone who can read, but ONLY if the
64 * file isn't already executable. */
65 if (!(flist_mode & 0111))
67 else if (!(dest_mode & 0111))
68 dest_mode |= (dest_mode & 0444) >> 2;
71 dest_mode = flist_mode & ~orig_umask;
72 return (flist_mode & ~CHMOD_BITS) | (dest_mode & CHMOD_BITS);
75 int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
80 int change_uid, change_gid;
85 if (link_stat(fname, &st2, 0) < 0) {
86 rsyserr(FERROR, errno, "stat %s failed",
93 if (!preserve_times || (S_ISDIR(st->st_mode) && omit_dir_times))
94 flags |= ATTRS_SKIP_MTIME;
95 if (!(flags & ATTRS_SKIP_MTIME)
96 && cmp_modtime(st->st_mtime, file->modtime) != 0) {
97 int ret = set_modtime(fname, file->modtime, st->st_mode);
99 rsyserr(FERROR, errno, "failed to set times on %s",
103 if (ret == 0) /* ret == 1 if symlink could not be set */
107 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
108 change_gid = preserve_gid && file->gid != GID_NONE
109 && st->st_gid != file->gid;
110 #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK
111 if (S_ISLNK(st->st_mode))
115 if (change_uid || change_gid) {
119 "set uid of %s from %ld to %ld\n",
121 (long)st->st_uid, (long)file->uid);
125 "set gid of %s from %ld to %ld\n",
127 (long)st->st_gid, (long)file->gid);
131 change_uid ? file->uid : st->st_uid,
132 change_gid ? file->gid : st->st_gid) != 0) {
133 /* shouldn't have attempted to change uid or gid
134 * unless have the privilege */
135 rsyserr(FERROR, errno, "%s %s failed",
136 change_uid ? "chown" : "chgrp",
140 /* a lchown had been done - we have to re-stat if the
141 * destination had the setuid or setgid bits set due
142 * to the side effect of the chown call */
143 if (st->st_mode & (S_ISUID | S_ISGID)) {
145 keep_dirlinks && S_ISDIR(st->st_mode));
151 if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) {
152 int ret = do_chmod(fname, file->mode);
154 rsyserr(FERROR, errno,
155 "failed to set permissions on %s",
159 if (ret == 0) /* ret == 1 if symlink could not be set */
164 if (verbose > 1 && flags & ATTRS_REPORT) {
165 enum logcode code = daemon_log_format_has_i || dry_run
168 rprintf(code, "%s\n", fname);
170 rprintf(code, "%s is uptodate\n", fname);
177 /* KLUGE: if the user hits Ctrl-C while ssh is prompting
178 * for a password, then our cleanup's sending of a SIGUSR1
179 * signal to all our children may kill ssh before it has a
180 * chance to restore the tty settings (i.e. turn echo back
181 * on). By sleeping for a short time, ssh gets a bigger
182 * chance to do the right thing. If child processes are
183 * not ssh waiting for a password, then this tiny delay
184 * shouldn't hurt anything. */
186 exit_cleanup(RERR_SIGNAL);
189 /* Finish off a file transfer: renaming the file and setting the file's
190 * attributes (e.g. permissions, ownership, etc.). If partialptr is not
191 * NULL and the robust_rename() call is forced to copy the temp file, we
192 * stage the file into the partial-dir and then rename it into place. */
193 void finish_transfer(char *fname, char *fnametmp, char *partialptr,
194 struct file_struct *file, int ok_to_set_time,
195 int overwriting_basis)
201 rprintf(FINFO, "finishing %s\n", fname);
203 goto do_set_file_attrs;
206 if (make_backups && overwriting_basis && !make_backup(fname))
209 /* Change permissions before putting the file into place. */
210 set_file_attrs(fnametmp, file, NULL,
211 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
213 /* move tmp file over real file */
215 rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
216 ret = robust_rename(fnametmp, fname, partialptr,
217 file->mode & INITACCESSPERMS);
219 rsyserr(FERROR, errno, "%s %s -> \"%s\"",
220 ret == -2 ? "copy" : "rename",
221 full_fname(fnametmp), fname);
226 /* The file was moved into place (not copied), so it's done. */
229 /* The file was copied, so tweak the perms of the copied file. If it
230 * was copied to partialptr, move it into its final destination. */
231 fnametmp = partialptr ? partialptr : fname;
234 set_file_attrs(fnametmp, file, NULL,
235 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
238 if (do_rename(fnametmp, fname) < 0) {
239 rsyserr(FERROR, errno, "rename %s -> \"%s\"",
240 full_fname(fnametmp), fname);
242 handle_partial_dir(partialptr, PDIR_DELETE);
246 const char *who_am_i(void)
249 return am_server ? "server" : "client";
250 return am_sender ? "sender" : am_generator ? "generator" : "receiver";