2 * Routines common to more than one of the rsync processes.
4 * Copyright (C) 1996 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
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
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
24 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
27 #if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
28 #include <libcharset.h>
29 #elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
35 extern int preserve_perms;
36 extern int preserve_executability;
37 extern int preserve_times;
38 extern int omit_dir_times;
42 extern int am_generator;
43 extern int am_starting_up;
44 extern int allow_8bit_chars;
45 extern int preserve_uid;
46 extern int preserve_gid;
48 extern int keep_dirlinks;
49 extern int make_backups;
50 extern mode_t orig_umask;
51 extern struct stats stats;
52 extern struct chmod_mode_struct *daemon_chmod_modes;
54 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
55 iconv_t ic_chck = (iconv_t)-1;
57 static const char *default_charset(void)
59 #if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
60 return locale_charset();
61 #elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
62 return nl_langinfo(CODESET);
64 return ""; /* Works with (at the very least) gnu iconv... */
70 if (!am_server && !allow_8bit_chars) {
71 const char *defset = default_charset();
73 /* It's OK if this fails... */
74 ic_chck = iconv_open(defset, defset);
77 if (ic_chck == (iconv_t)-1) {
79 "note: iconv_open(\"%s\", \"%s\") failed (%d)"
80 " -- using isprint() instead of iconv().\n",
81 defset, defset, errno);
84 "note: iconv_open(\"%s\", \"%s\") succeeded.\n",
95 void free_sums(struct sum_struct *s)
97 if (s->sums) free(s->sums);
101 /* This is only called when we aren't preserving permissions. Figure out what
102 * the permissions should be and return them merged back into the mode. */
103 mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int exists)
106 /* If the file already exists, we'll return the local permissions,
107 * possibly tweaked by the --executability option. */
109 new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS);
110 if (preserve_executability && S_ISREG(flist_mode)) {
111 /* If the source file is executable, grant execute
112 * rights to everyone who can read, but ONLY if the
113 * file isn't already executable. */
114 if (!(flist_mode & 0111))
116 else if (!(stat_mode & 0111))
117 new_mode |= (new_mode & 0444) >> 2;
120 /* Apply the umask and turn off special permissions. */
121 new_mode = flist_mode & (~CHMOD_BITS | (ACCESSPERMS & ~orig_umask));
126 int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
131 int change_uid, change_gid;
132 mode_t new_mode = file->mode;
137 if (link_stat(fname, &st2, 0) < 0) {
138 rsyserr(FERROR, errno, "stat %s failed",
143 if (!preserve_perms && S_ISDIR(new_mode)
144 && st->st_mode & S_ISGID) {
145 /* We just created this directory and its setgid
146 * bit is on, so make sure it stays on. */
151 if (!preserve_times || (S_ISDIR(st->st_mode) && omit_dir_times))
152 flags |= ATTRS_SKIP_MTIME;
153 if (!(flags & ATTRS_SKIP_MTIME)
154 && cmp_time(st->st_mtime, file->modtime) != 0) {
155 int ret = set_modtime(fname, file->modtime, st->st_mode);
157 rsyserr(FERROR, errno, "failed to set times on %s",
161 if (ret == 0) /* ret == 1 if symlink could not be set */
165 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
166 change_gid = preserve_gid && file->gid != GID_NONE
167 && st->st_gid != file->gid;
168 #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK
169 if (S_ISLNK(st->st_mode))
173 if (change_uid || change_gid) {
177 "set uid of %s from %ld to %ld\n",
179 (long)st->st_uid, (long)file->uid);
183 "set gid of %s from %ld to %ld\n",
185 (long)st->st_gid, (long)file->gid);
189 change_uid ? file->uid : st->st_uid,
190 change_gid ? file->gid : st->st_gid) != 0) {
191 /* shouldn't have attempted to change uid or gid
192 * unless have the privilege */
193 rsyserr(FERROR, errno, "%s %s failed",
194 change_uid ? "chown" : "chgrp",
198 /* a lchown had been done - we have to re-stat if the
199 * destination had the setuid or setgid bits set due
200 * to the side effect of the chown call */
201 if (st->st_mode & (S_ISUID | S_ISGID)) {
203 keep_dirlinks && S_ISDIR(st->st_mode));
208 if (daemon_chmod_modes && !S_ISLNK(new_mode))
209 new_mode = tweak_mode(new_mode, daemon_chmod_modes);
211 if ((st->st_mode & CHMOD_BITS) != (new_mode & CHMOD_BITS)) {
212 int ret = do_chmod(fname, new_mode);
214 rsyserr(FERROR, errno,
215 "failed to set permissions on %s",
219 if (ret == 0) /* ret == 1 if symlink could not be set */
224 if (verbose > 1 && flags & ATTRS_REPORT) {
226 rprintf(FCLIENT, "%s\n", fname);
228 rprintf(FCLIENT, "%s is uptodate\n", fname);
233 RETSIGTYPE sig_int(UNUSED(int val))
235 /* KLUGE: if the user hits Ctrl-C while ssh is prompting
236 * for a password, then our cleanup's sending of a SIGUSR1
237 * signal to all our children may kill ssh before it has a
238 * chance to restore the tty settings (i.e. turn echo back
239 * on). By sleeping for a short time, ssh gets a bigger
240 * chance to do the right thing. If child processes are
241 * not ssh waiting for a password, then this tiny delay
242 * shouldn't hurt anything. */
244 exit_cleanup(RERR_SIGNAL);
247 /* Finish off a file transfer: renaming the file and setting the file's
248 * attributes (e.g. permissions, ownership, etc.). If partialptr is not
249 * NULL and the robust_rename() call is forced to copy the temp file, we
250 * stage the file into the partial-dir and then rename it into place. */
251 void finish_transfer(char *fname, char *fnametmp, char *partialptr,
252 struct file_struct *file, int ok_to_set_time,
253 int overwriting_basis)
259 rprintf(FINFO, "finishing %s\n", fname);
261 goto do_set_file_attrs;
264 if (make_backups && overwriting_basis && !make_backup(fname))
267 /* Change permissions before putting the file into place. */
268 set_file_attrs(fnametmp, file, NULL,
269 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
271 /* move tmp file over real file */
273 rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
274 ret = robust_rename(fnametmp, fname, partialptr,
275 file->mode & INITACCESSPERMS);
277 rsyserr(FERROR, errno, "%s %s -> \"%s\"",
278 ret == -2 ? "copy" : "rename",
279 full_fname(fnametmp), fname);
284 /* The file was moved into place (not copied), so it's done. */
287 /* The file was copied, so tweak the perms of the copied file. If it
288 * was copied to partialptr, move it into its final destination. */
289 fnametmp = partialptr ? partialptr : fname;
292 set_file_attrs(fnametmp, file, NULL,
293 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
296 if (do_rename(fnametmp, fname) < 0) {
297 rsyserr(FERROR, errno, "rename %s -> \"%s\"",
298 full_fname(fnametmp), fname);
300 handle_partial_dir(partialptr, PDIR_DELETE);
304 const char *who_am_i(void)
307 return am_server ? "server" : "client";
308 return am_sender ? "sender" : am_generator ? "generator" : "receiver";