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;
38 void free_sums(struct sum_struct *s)
40 if (s->sums) free(s->sums);
46 * delete a file or directory. If force_delete is set then delete
49 int delete_file(char *fname)
54 extern int force_delete;
60 ret = do_lstat(fname, &st);
62 ret = do_stat(fname, &st);
68 if (!S_ISDIR(st.st_mode)) {
69 if (robust_unlink(fname) == 0 || errno == ENOENT) return 0;
70 rprintf(FERROR, "delete_file: unlink %s failed: %s\n",
71 full_fname(fname), strerror(errno));
75 if (do_rmdir(fname) == 0 || errno == ENOENT) return 0;
76 if (!force_delete || !recurse ||
77 (errno != ENOTEMPTY && errno != EEXIST)) {
78 rprintf(FERROR, "delete_file: rmdir %s failed: %s\n",
79 full_fname(fname), strerror(errno));
83 /* now we do a recsursive delete on the directory ... */
86 rprintf(FERROR, "delete_file: opendir %s failed: %s\n",
87 full_fname(fname), strerror(errno));
91 for (di=readdir(d); di; di=readdir(d)) {
92 char *dname = d_name(di);
93 if (strcmp(dname,".")==0 ||
94 strcmp(dname,"..")==0)
96 snprintf(buf, sizeof(buf), "%s/%s", fname, dname);
98 rprintf(FINFO,"deleting %s\n", buf);
99 if (delete_file(buf) != 0) {
107 if (do_rmdir(fname) != 0) {
108 rprintf(FERROR, "delete_file: rmdir %s failed: %s\n",
109 full_fname(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;
157 if (dry_run) return 0;
160 if (link_stat(fname,&st2) != 0) {
161 rprintf(FERROR, "stat %s failed: %s\n",
162 full_fname(fname), strerror(errno));
168 if (preserve_times && !S_ISLNK(st->st_mode) &&
169 cmp_modtime(st->st_mtime, file->modtime) != 0) {
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 full_fname(fname), strerror(errno));
182 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
183 change_gid = 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 failed: %s\n",
197 full_fname(fname), strerror(errno));
200 /* a lchown had been done - we have to re-stat if the
201 destination had the setuid or setgid bits set due
202 to the side effect of the chown call */
203 if (st->st_mode & (S_ISUID | S_ISGID)) {
204 link_stat(fname, st);
210 if (!S_ISLNK(st->st_mode)) {
211 if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) {
213 if (do_chmod(fname,(file->mode & CHMOD_BITS)) != 0) {
214 rprintf(FERROR, "failed to set permissions on %s: %s\n",
215 full_fname(fname), strerror(errno));
222 if (verbose > 1 && report) {
224 rprintf(FINFO,"%s\n",fname);
226 rprintf(FINFO,"%s is uptodate\n",fname);
234 exit_cleanup(RERR_SIGNAL);
238 /* finish off a file transfer, renaming the file and setting the permissions
240 void finish_transfer(char *fname, char *fnametmp, struct file_struct *file)
242 if (make_backups && !make_backup(fname))
245 /* move tmp file over real file */
246 if (robust_rename(fnametmp,fname) != 0) {
247 if (errno == EXDEV) {
248 /* rename failed on cross-filesystem link.
249 Copy the file instead. */
250 if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) {
251 rprintf(FERROR, "copy %s -> \"%s\": %s\n",
252 full_fname(fnametmp), fname,
255 set_perms(fname,file,NULL,0);
258 rprintf(FERROR,"rename %s -> \"%s\": %s\n",
259 full_fname(fnametmp), fname, strerror(errno));
263 set_perms(fname,file,NULL,0);