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_perms;
29 extern int preserve_executability;
30 extern int preserve_times;
31 extern int omit_dir_times;
32 extern int orig_umask;
36 extern int am_generator;
37 extern int am_starting_up;
38 extern int preserve_uid;
39 extern int preserve_gid;
41 extern int keep_dirlinks;
42 extern int make_backups;
43 extern struct stats stats;
49 void free_sums(struct sum_struct *s)
51 if (s->sums) free(s->sums);
55 /* This is only called when we aren't preserving permissions. Figure out what
56 * the permissions should be and return them merged back into the mode. */
57 mode_t dest_mode(mode_t flist_mode, mode_t dest_mode, int exists)
59 /* If the file already exists, we'll return the local permissions,
60 * possibly tweaked by the --executability option. */
62 if (preserve_executability && S_ISREG(flist_mode)) {
63 /* If the source file is executable, grant execute
64 * rights to everyone who can read, but ONLY if the
65 * file isn't already executable. */
66 if (!(flist_mode & 0111))
68 else if (!(dest_mode & 0111))
69 dest_mode |= (dest_mode & 0444) >> 2;
72 dest_mode = flist_mode & ACCESSPERMS & ~orig_umask;
73 return (flist_mode & ~CHMOD_BITS) | (dest_mode & CHMOD_BITS);
76 int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
81 int change_uid, change_gid;
86 if (link_stat(fname, &st2, 0) < 0) {
87 rsyserr(FERROR, errno, "stat %s failed",
92 if (!preserve_perms && S_ISDIR(file->mode)
93 && st->st_mode & S_ISGID) {
94 /* We just created this directory and its setgid
95 * bit is on, so make sure it stays on. */
96 file->mode |= S_ISGID;
100 if (!preserve_times || (S_ISDIR(st->st_mode) && omit_dir_times))
101 flags |= ATTRS_SKIP_MTIME;
102 if (!(flags & ATTRS_SKIP_MTIME)
103 && cmp_modtime(st->st_mtime, file->modtime) != 0) {
104 int ret = set_modtime(fname, file->modtime, st->st_mode);
106 rsyserr(FERROR, errno, "failed to set times on %s",
110 if (ret == 0) /* ret == 1 if symlink could not be set */
114 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
115 change_gid = preserve_gid && file->gid != GID_NONE
116 && st->st_gid != file->gid;
117 #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK
118 if (S_ISLNK(st->st_mode))
122 if (change_uid || change_gid) {
126 "set uid of %s from %ld to %ld\n",
128 (long)st->st_uid, (long)file->uid);
132 "set gid of %s from %ld to %ld\n",
134 (long)st->st_gid, (long)file->gid);
138 change_uid ? file->uid : st->st_uid,
139 change_gid ? file->gid : st->st_gid) != 0) {
140 /* shouldn't have attempted to change uid or gid
141 * unless have the privilege */
142 rsyserr(FERROR, errno, "%s %s failed",
143 change_uid ? "chown" : "chgrp",
147 /* a lchown had been done - we have to re-stat if the
148 * destination had the setuid or setgid bits set due
149 * to the side effect of the chown call */
150 if (st->st_mode & (S_ISUID | S_ISGID)) {
152 keep_dirlinks && S_ISDIR(st->st_mode));
158 if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) {
159 int ret = do_chmod(fname, file->mode);
161 rsyserr(FERROR, errno,
162 "failed to set permissions on %s",
166 if (ret == 0) /* ret == 1 if symlink could not be set */
171 if (verbose > 1 && flags & ATTRS_REPORT) {
172 enum logcode code = daemon_log_format_has_i || dry_run
175 rprintf(code, "%s\n", fname);
177 rprintf(code, "%s is uptodate\n", fname);
182 RETSIGTYPE sig_int(UNUSED(int val))
184 /* KLUGE: if the user hits Ctrl-C while ssh is prompting
185 * for a password, then our cleanup's sending of a SIGUSR1
186 * signal to all our children may kill ssh before it has a
187 * chance to restore the tty settings (i.e. turn echo back
188 * on). By sleeping for a short time, ssh gets a bigger
189 * chance to do the right thing. If child processes are
190 * not ssh waiting for a password, then this tiny delay
191 * shouldn't hurt anything. */
193 exit_cleanup(RERR_SIGNAL);
196 /* Finish off a file transfer: renaming the file and setting the file's
197 * attributes (e.g. permissions, ownership, etc.). If partialptr is not
198 * NULL and the robust_rename() call is forced to copy the temp file, we
199 * stage the file into the partial-dir and then rename it into place. */
200 void finish_transfer(char *fname, char *fnametmp, char *partialptr,
201 struct file_struct *file, int ok_to_set_time,
202 int overwriting_basis)
208 rprintf(FINFO, "finishing %s\n", fname);
210 goto do_set_file_attrs;
213 if (make_backups && overwriting_basis && !make_backup(fname))
216 /* Change permissions before putting the file into place. */
217 set_file_attrs(fnametmp, file, NULL,
218 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
220 /* move tmp file over real file */
222 rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
223 ret = robust_rename(fnametmp, fname, partialptr,
224 file->mode & INITACCESSPERMS);
226 rsyserr(FERROR, errno, "%s %s -> \"%s\"",
227 ret == -2 ? "copy" : "rename",
228 full_fname(fnametmp), fname);
233 /* The file was moved into place (not copied), so it's done. */
236 /* The file was copied, so tweak the perms of the copied file. If it
237 * was copied to partialptr, move it into its final destination. */
238 fnametmp = partialptr ? partialptr : fname;
241 set_file_attrs(fnametmp, file, NULL,
242 ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
245 if (do_rename(fnametmp, fname) < 0) {
246 rsyserr(FERROR, errno, "rename %s -> \"%s\"",
247 full_fname(fnametmp), fname);
249 handle_partial_dir(partialptr, PDIR_DELETE);
253 const char *who_am_i(void)
256 return am_server ? "server" : "client";
257 return am_sender ? "sender" : am_generator ? "generator" : "receiver";