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 preserve_times;
29 extern int preserve_uid;
30 extern int preserve_gid;
31 extern int preserve_perms;
32 extern int make_backups;
33 extern char *backup_suffix;
39 void free_sums(struct sum_struct *s)
41 if (s->sums) free(s->sums);
47 * delete a file or directory. If force_delet is set then delete
50 int delete_file(char *fname)
55 extern int force_delete;
60 if (do_unlink(fname) == 0 || errno == ENOENT) return 0;
63 ret = do_lstat(fname, &st);
65 ret = do_stat(fname, &st);
68 rprintf(FERROR,"stat(%s) : %s\n", fname, strerror(errno));
72 if (!S_ISDIR(st.st_mode)) {
73 rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno));
77 if (do_rmdir(fname) == 0 || errno == ENOENT) return 0;
78 if (!force_delete || !recurse ||
79 (errno != ENOTEMPTY && errno != EEXIST)) {
80 rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
84 /* now we do a recsursive delete on the directory ... */
87 rprintf(FERROR,"opendir(%s): %s\n",
88 fname,strerror(errno));
92 for (di=readdir(d); di; di=readdir(d)) {
93 char *dname = d_name(di);
94 if (strcmp(dname,".")==0 ||
95 strcmp(dname,"..")==0)
97 slprintf(buf, sizeof(buf), "%s/%s", fname, dname);
99 rprintf(FINFO,"deleting %s\n", buf);
100 if (delete_file(buf) != 0) {
108 if (do_rmdir(fname) != 0) {
109 rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
116 static int is_in_group(gid_t gid)
119 static gid_t last_in = (gid_t) -2, last_out;
120 static int ngroups = -2;
121 static GETGROUPS_T *gidset;
127 /* treat failure (-1) as if not member of any group */
128 ngroups = getgroups(0, 0);
130 gidset = (GETGROUPS_T *) malloc(ngroups * sizeof(GETGROUPS_T));
131 ngroups = getgroups(ngroups, gidset);
137 for (n = 0; n < ngroups; n++) {
138 if (gidset[n] == gid) {
150 int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
155 int change_uid, change_gid;
156 extern int am_daemon;
158 if (dry_run) return 0;
161 if (link_stat(fname,&st2) != 0) {
162 rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno));
168 if (preserve_times && !S_ISLNK(st->st_mode) &&
169 st->st_mtime != file->modtime) {
170 /* don't complain about not setting times on directories
171 because some filesystems can't do it */
172 if (set_modtime(fname,file->modtime) != 0 &&
173 !S_ISDIR(st->st_mode)) {
174 rprintf(FERROR,"failed to set times on %s : %s\n",
175 fname,strerror(errno));
182 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
183 change_gid = !am_daemon && preserve_gid && file->gid != (gid_t) -1 && \
184 st->st_gid != file->gid;
185 if (change_gid && !am_root) {
186 /* enforce bsd-style group semantics: non-root can only
187 change to groups that the user is a member of */
188 change_gid = is_in_group(file->gid);
190 if (change_uid || change_gid) {
192 change_uid?file->uid:st->st_uid,
193 change_gid?file->gid:st->st_gid) != 0) {
194 /* shouldn't have attempted to change uid or gid
195 unless have the privilege */
196 rprintf(FERROR,"chown %s : %s\n", fname,strerror(errno));
203 if (preserve_perms && !S_ISLNK(st->st_mode) &&
204 (st->st_mode != file->mode ||
205 (updated && (file->mode & ~INITPERMMASK)))) {
207 if (do_chmod(fname,file->mode) != 0) {
208 rprintf(FERROR,"failed to set permissions on %s : %s\n",
209 fname,strerror(errno));
215 if (verbose > 1 && report) {
217 rprintf(FINFO,"%s\n",fname);
219 rprintf(FINFO,"%s is uptodate\n",fname);
227 exit_cleanup(RERR_SIGNAL);
230 int make_backup(char *fname)
232 char fnamebak[MAXPATHLEN];
233 if (strlen(fname) + strlen(backup_suffix) > (MAXPATHLEN-1)) {
234 rprintf(FERROR,"backup filename too long\n");
238 slprintf(fnamebak,sizeof(fnamebak),"%s%s",fname,backup_suffix);
239 if (do_rename(fname,fnamebak) != 0) {
240 if (errno != ENOENT) {
241 rprintf(FERROR,"rename %s %s : %s\n",fname,fnamebak,strerror(errno));
244 } else if (verbose > 1) {
245 rprintf(FINFO,"backed up %s to %s\n",fname,fnamebak);
251 /* finish off a file transfer, renaming the file and setting the permissions
253 void finish_transfer(char *fname, char *fnametmp, struct file_struct *file)
255 if (make_backups && !make_backup(fname))
258 /* move tmp file over real file */
259 if (do_rename(fnametmp,fname) != 0) {
260 if (errno == EXDEV) {
261 /* rename failed on cross-filesystem link.
262 Copy the file instead. */
263 if (copy_file(fnametmp,fname, file->mode & INITPERMMASK)) {
264 rprintf(FERROR,"copy %s -> %s : %s\n",
265 fnametmp,fname,strerror(errno));
267 set_perms(fname,file,NULL,0);
271 rprintf(FERROR,"rename %s -> %s : %s\n",
272 fnametmp,fname,strerror(errno));
276 set_perms(fname,file,NULL,0);