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 protocol_version;
46 extern int preserve_uid;
47 extern int preserve_gid;
49 extern int keep_dirlinks;
50 extern int make_backups;
51 extern mode_t orig_umask;
52 extern struct stats stats;
53 extern struct file_list *the_file_list;
54 extern struct chmod_mode_struct *daemon_chmod_modes;
56 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
57 iconv_t ic_chck = (iconv_t)-1;
59 static const char *default_charset(void)
61 #if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
62 return locale_charset();
63 #elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
64 return nl_langinfo(CODESET);
66 return ""; /* Works with (at the very least) gnu iconv... */
72 if (!am_server && !allow_8bit_chars) {
73 const char *defset = default_charset();
75 /* It's OK if this fails... */
76 ic_chck = iconv_open(defset, defset);
79 if (ic_chck == (iconv_t)-1) {
81 "note: iconv_open(\"%s\", \"%s\") failed (%d)"
82 " -- using isprint() instead of iconv().\n",
83 defset, defset, errno);
86 "note: iconv_open(\"%s\", \"%s\") succeeded.\n",
94 static void write_ndx_and_attrs(int f_out, int ndx, int iflags,
95 uchar fnamecmp_type, char *buf, int len)
97 write_int(f_out, ndx);
98 if (protocol_version < 29)
100 write_shortint(f_out, iflags);
101 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
102 write_byte(f_out, fnamecmp_type);
103 if (iflags & ITEM_XNAME_FOLLOWS)
104 write_vstring(f_out, buf, len);
107 /* This is used by sender.c with a valid f_out, and by receive.c with
109 int read_item_attrs(int f_in, int f_out, int ndx, uchar *type_ptr,
110 char *buf, int *len_ptr)
113 uchar fnamecmp_type = FNAMECMP_FNAME;
114 int iflags = protocol_version >= 29 ? read_shortint(f_in)
115 : ITEM_TRANSFER | ITEM_MISSING_DATA;
117 /* Handle the new keep-alive (no-op) packet. */
118 if (ndx == the_file_list->count && iflags == ITEM_IS_NEW)
120 else if (ndx < 0 || ndx >= the_file_list->count) {
121 rprintf(FERROR, "Invalid file index: %d (count=%d) [%s]\n",
122 ndx, the_file_list->count, who_am_i());
123 exit_cleanup(RERR_PROTOCOL);
124 } else if (iflags == ITEM_IS_NEW) {
125 rprintf(FERROR, "Invalid itemized flag word: %x [%s]\n",
127 exit_cleanup(RERR_PROTOCOL);
130 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
131 fnamecmp_type = read_byte(f_in);
132 *type_ptr = fnamecmp_type;
134 if (iflags & ITEM_XNAME_FOLLOWS) {
135 if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0)
136 exit_cleanup(RERR_PROTOCOL);
143 if (iflags & ITEM_TRANSFER) {
144 if (!S_ISREG(the_file_list->files[ndx]->mode)) {
146 "received request to transfer non-regular file: %d [%s]\n",
148 exit_cleanup(RERR_PROTOCOL);
150 } else if (f_out >= 0) {
151 write_ndx_and_attrs(f_out, ndx, iflags,
152 fnamecmp_type, buf, len);
161 void free_sums(struct sum_struct *s)
163 if (s->sums) free(s->sums);
167 /* This is only called when we aren't preserving permissions. Figure out what
168 * the permissions should be and return them merged back into the mode. */
169 mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int exists)
172 /* If the file already exists, we'll return the local permissions,
173 * possibly tweaked by the --executability option. */
175 new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS);
176 if (preserve_executability && S_ISREG(flist_mode)) {
177 /* If the source file is executable, grant execute
178 * rights to everyone who can read, but ONLY if the
179 * file isn't already executable. */
180 if (!(flist_mode & 0111))
182 else if (!(stat_mode & 0111))
183 new_mode |= (new_mode & 0444) >> 2;
186 /* Apply the umask and turn off special permissions. */
187 new_mode = flist_mode & (~CHMOD_BITS | (ACCESSPERMS & ~orig_umask));
192 int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
197 int change_uid, change_gid;
198 mode_t new_mode = file->mode;
203 if (link_stat(fname, &st2, 0) < 0) {
204 rsyserr(FERROR, errno, "stat %s failed",
209 if (!preserve_perms && S_ISDIR(new_mode)
210 && st->st_mode & S_ISGID) {
211 /* We just created this directory and its setgid
212 * bit is on, so make sure it stays on. */
217 if (!preserve_times || (S_ISDIR(st->st_mode) && omit_dir_times))
218 flags |= ATTRS_SKIP_MTIME;
219 if (!(flags & ATTRS_SKIP_MTIME)
220 && cmp_time(st->st_mtime, file->modtime) != 0) {
221 int ret = set_modtime(fname, file->modtime, st->st_mode);
223 rsyserr(FERROR, errno, "failed to set times on %s",
227 if (ret == 0) /* ret == 1 if symlink could not be set */
231 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
232 change_gid = preserve_gid && file->gid != GID_NONE
233 && st->st_gid != file->gid;
234 #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK
235 if (S_ISLNK(st->st_mode))
239 if (change_uid || change_gid) {
243 "set uid of %s from %ld to %ld\n",
245 (long)st->st_uid, (long)file->uid);
249 "set gid of %s from %ld to %ld\n",
251 (long)st->st_gid, (long)file->gid);
255 change_uid ? file->uid : st->st_uid,
256 change_gid ? file->gid : st->st_gid) != 0) {
257 /* shouldn't have attempted to change uid or gid
258 * unless have the privilege */
259 rsyserr(FERROR, errno, "%s %s failed",
260 change_uid ? "chown" : "chgrp",
264 /* a lchown had been done - we have to re-stat if the
265 * destination had the setuid or setgid bits set due
266 * to the side effect of the chown call */
267 if (st->st_mode & (S_ISUID | S_ISGID)) {
269 keep_dirlinks && S_ISDIR(st->st_mode));
274 if (daemon_chmod_modes && !S_ISLNK(new_mode))
275 new_mode = tweak_mode(new_mode, daemon_chmod_modes);
277 if ((st->st_mode & CHMOD_BITS) != (new_mode & CHMOD_BITS)) {
278 int ret = do_chmod(fname, new_mode);
280 rsyserr(FERROR, errno,
281 "failed to set permissions on %s",
285 if (ret == 0) /* ret == 1 if symlink could not be set */
290 if (verbose > 1 && flags & ATTRS_REPORT) {
292 rprintf(FCLIENT, "%s\n", fname);
294 rprintf(FCLIENT, "%s is uptodate\n", fname);
299 RETSIGTYPE sig_int(UNUSED(int val))
301 /* KLUGE: if the user hits Ctrl-C while ssh is prompting
302 * for a password, then our cleanup's sending of a SIGUSR1
303 * signal to all our children may kill ssh before it has a
304 * chance to restore the tty settings (i.e. turn echo back
305 * on). By sleeping for a short time, ssh gets a bigger
306 * chance to do the right thing. If child processes are
307 * not ssh waiting for a password, then this tiny delay
308 * shouldn't hurt anything. */
310 exit_cleanup(RERR_SIGNAL);
313 /* Finish off a file transfer: renaming the file and setting the file's
314 * attributes (e.g. permissions, ownership, etc.). If partialptr is not
315 * NULL and the robust_rename() call is forced to copy the temp file, we
316 * stage the file into the partial-dir and then rename it into place. */
317 void finish_transfer(char *fname, char *fnametmp, char *partialptr,
318 struct file_struct *file, int ok_to_set_time,
319 int overwriting_basis)
325 rprintf(FINFO, "finishing %s\n", fname);
327 goto do_set_file_attrs;
330 if (make_backups && overwriting_basis && !make_backup(fname))
333 /* Change permissions before putting the file into place. */
334 set_file_attrs(fnametmp, file, NULL,
335 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
337 /* move tmp file over real file */
339 rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
340 ret = robust_rename(fnametmp, fname, partialptr,
341 file->mode & INITACCESSPERMS);
343 rsyserr(FERROR, errno, "%s %s -> \"%s\"",
344 ret == -2 ? "copy" : "rename",
345 full_fname(fnametmp), fname);
350 /* The file was moved into place (not copied), so it's done. */
353 /* The file was copied, so tweak the perms of the copied file. If it
354 * was copied to partialptr, move it into its final destination. */
355 fnametmp = partialptr ? partialptr : fname;
358 set_file_attrs(fnametmp, file, NULL,
359 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
362 if (do_rename(fnametmp, fname) < 0) {
363 rsyserr(FERROR, errno, "rename %s -> \"%s\"",
364 full_fname(fnametmp), fname);
366 handle_partial_dir(partialptr, PDIR_DELETE);
370 const char *who_am_i(void)
373 return am_server ? "server" : "client";
374 return am_sender ? "sender" : am_generator ? "generator" : "receiver";