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",
92 /* This is used by sender.c with a valid f_out, and by receive.c with
94 int read_item_attrs(int f_in, int f_out, int ndx, uchar *type_ptr,
95 char *buf, int *len_ptr)
98 uchar fnamecmp_type = FNAMECMP_FNAME;
99 int iflags = protocol_version >= 29 ? read_shortint(f_in)
100 : ITEM_TRANSFER | ITEM_MISSING_DATA;
102 /* Handle the new keep-alive (no-op) packet. */
103 if (ndx == the_file_list->count && iflags == ITEM_IS_NEW)
105 else if (ndx < 0 || ndx >= the_file_list->count) {
106 rprintf(FERROR, "Invalid file index: %d (count=%d) [%s]\n",
107 ndx, the_file_list->count, who_am_i());
108 exit_cleanup(RERR_PROTOCOL);
109 } else if (iflags == ITEM_IS_NEW) {
110 rprintf(FERROR, "Invalid itemized flag word: %x [%s]\n",
112 exit_cleanup(RERR_PROTOCOL);
115 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
116 fnamecmp_type = read_byte(f_in);
117 *type_ptr = fnamecmp_type;
119 if (iflags & ITEM_XNAME_FOLLOWS) {
120 if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0)
121 exit_cleanup(RERR_PROTOCOL);
128 if (iflags & ITEM_TRANSFER) {
129 if (!S_ISREG(the_file_list->files[ndx]->mode)) {
131 "received request to transfer non-regular file: %d [%s]\n",
133 exit_cleanup(RERR_PROTOCOL);
135 } else if (f_out >= 0) {
136 write_ndx_and_attrs(f_out, ndx, iflags,
137 fnamecmp_type, buf, len);
146 void free_sums(struct sum_struct *s)
148 if (s->sums) free(s->sums);
152 /* This is only called when we aren't preserving permissions. Figure out what
153 * the permissions should be and return them merged back into the mode. */
154 mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int exists)
157 /* If the file already exists, we'll return the local permissions,
158 * possibly tweaked by the --executability option. */
160 new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS);
161 if (preserve_executability && S_ISREG(flist_mode)) {
162 /* If the source file is executable, grant execute
163 * rights to everyone who can read, but ONLY if the
164 * file isn't already executable. */
165 if (!(flist_mode & 0111))
167 else if (!(stat_mode & 0111))
168 new_mode |= (new_mode & 0444) >> 2;
171 /* Apply the umask and turn off special permissions. */
172 new_mode = flist_mode & (~CHMOD_BITS | (ACCESSPERMS & ~orig_umask));
177 int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
182 int change_uid, change_gid;
183 mode_t new_mode = file->mode;
188 if (link_stat(fname, &st2, 0) < 0) {
189 rsyserr(FERROR, errno, "stat %s failed",
194 if (!preserve_perms && S_ISDIR(new_mode)
195 && st->st_mode & S_ISGID) {
196 /* We just created this directory and its setgid
197 * bit is on, so make sure it stays on. */
202 if (!preserve_times || (S_ISDIR(st->st_mode) && omit_dir_times))
203 flags |= ATTRS_SKIP_MTIME;
204 if (!(flags & ATTRS_SKIP_MTIME)
205 && cmp_time(st->st_mtime, file->modtime) != 0) {
206 int ret = set_modtime(fname, file->modtime, st->st_mode);
208 rsyserr(FERROR, errno, "failed to set times on %s",
212 if (ret == 0) /* ret == 1 if symlink could not be set */
216 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
217 change_gid = preserve_gid && file->gid != GID_NONE
218 && st->st_gid != file->gid;
219 #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK
220 if (S_ISLNK(st->st_mode))
224 if (change_uid || change_gid) {
228 "set uid of %s from %ld to %ld\n",
230 (long)st->st_uid, (long)file->uid);
234 "set gid of %s from %ld to %ld\n",
236 (long)st->st_gid, (long)file->gid);
240 change_uid ? file->uid : st->st_uid,
241 change_gid ? file->gid : st->st_gid) != 0) {
242 /* shouldn't have attempted to change uid or gid
243 * unless have the privilege */
244 rsyserr(FERROR, errno, "%s %s failed",
245 change_uid ? "chown" : "chgrp",
249 /* a lchown had been done - we have to re-stat if the
250 * destination had the setuid or setgid bits set due
251 * to the side effect of the chown call */
252 if (st->st_mode & (S_ISUID | S_ISGID)) {
254 keep_dirlinks && S_ISDIR(st->st_mode));
259 if (daemon_chmod_modes && !S_ISLNK(new_mode))
260 new_mode = tweak_mode(new_mode, daemon_chmod_modes);
262 if ((st->st_mode & CHMOD_BITS) != (new_mode & CHMOD_BITS)) {
263 int ret = do_chmod(fname, new_mode);
265 rsyserr(FERROR, errno,
266 "failed to set permissions on %s",
270 if (ret == 0) /* ret == 1 if symlink could not be set */
275 if (verbose > 1 && flags & ATTRS_REPORT) {
277 rprintf(FCLIENT, "%s\n", fname);
279 rprintf(FCLIENT, "%s is uptodate\n", fname);
284 RETSIGTYPE sig_int(UNUSED(int val))
286 /* KLUGE: if the user hits Ctrl-C while ssh is prompting
287 * for a password, then our cleanup's sending of a SIGUSR1
288 * signal to all our children may kill ssh before it has a
289 * chance to restore the tty settings (i.e. turn echo back
290 * on). By sleeping for a short time, ssh gets a bigger
291 * chance to do the right thing. If child processes are
292 * not ssh waiting for a password, then this tiny delay
293 * shouldn't hurt anything. */
295 exit_cleanup(RERR_SIGNAL);
298 /* Finish off a file transfer: renaming the file and setting the file's
299 * attributes (e.g. permissions, ownership, etc.). If partialptr is not
300 * NULL and the robust_rename() call is forced to copy the temp file, we
301 * stage the file into the partial-dir and then rename it into place. */
302 void finish_transfer(char *fname, char *fnametmp, char *partialptr,
303 struct file_struct *file, int ok_to_set_time,
304 int overwriting_basis)
310 rprintf(FINFO, "finishing %s\n", fname);
312 goto do_set_file_attrs;
315 if (make_backups && overwriting_basis && !make_backup(fname))
318 /* Change permissions before putting the file into place. */
319 set_file_attrs(fnametmp, file, NULL,
320 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
322 /* move tmp file over real file */
324 rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
325 ret = robust_rename(fnametmp, fname, partialptr,
326 file->mode & INITACCESSPERMS);
328 rsyserr(FERROR, errno, "%s %s -> \"%s\"",
329 ret == -2 ? "copy" : "rename",
330 full_fname(fnametmp), fname);
335 /* The file was moved into place (not copied), so it's done. */
338 /* The file was copied, so tweak the perms of the copied file. If it
339 * was copied to partialptr, move it into its final destination. */
340 fnametmp = partialptr ? partialptr : fname;
343 set_file_attrs(fnametmp, file, NULL,
344 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
347 if (do_rename(fnametmp, fname) < 0) {
348 rsyserr(FERROR, errno, "rename %s -> \"%s\"",
349 full_fname(fnametmp), fname);
351 handle_partial_dir(partialptr, PDIR_DELETE);
355 const char *who_am_i(void)
358 return am_server ? "server" : "client";
359 return am_sender ? "sender" : am_generator ? "generator" : "receiver";