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_delet is set then delete
49 int delete_file(char *fname)
54 extern int force_delete;
59 if (robust_unlink(fname) == 0 || errno == ENOENT) return 0;
62 ret = do_lstat(fname, &st);
64 ret = do_stat(fname, &st);
67 rprintf(FERROR,"stat(%s) : %s\n", fname, strerror(errno));
71 if (!S_ISDIR(st.st_mode)) {
72 rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno));
76 if (do_rmdir(fname) == 0 || errno == ENOENT) return 0;
77 if (!force_delete || !recurse ||
78 (errno != ENOTEMPTY && errno != EEXIST)) {
79 rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
83 /* now we do a recsursive delete on the directory ... */
86 rprintf(FERROR,"opendir(%s): %s\n",
87 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 slprintf(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,"rmdir(%s) : %s\n", fname, strerror(errno));
115 static int is_in_group(gid_t gid)
118 static gid_t last_in = (gid_t) -2, last_out;
119 static int ngroups = -2;
120 static GETGROUPS_T *gidset;
126 /* treat failure (-1) as if not member of any group */
127 ngroups = getgroups(0, 0);
129 gidset = (GETGROUPS_T *) malloc(ngroups * sizeof(GETGROUPS_T));
130 ngroups = getgroups(ngroups, gidset);
136 for (n = 0; n < ngroups; n++) {
137 if (gidset[n] == gid) {
149 int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
154 int change_uid, change_gid;
156 if (dry_run) return 0;
159 if (link_stat(fname,&st2) != 0) {
160 rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno));
166 if (preserve_times && !S_ISLNK(st->st_mode) &&
167 st->st_mtime != file->modtime) {
168 /* don't complain about not setting times on directories
169 because some filesystems can't do it */
170 if (set_modtime(fname,file->modtime) != 0 &&
171 !S_ISDIR(st->st_mode)) {
172 rprintf(FERROR,"failed to set times on %s : %s\n",
173 fname,strerror(errno));
180 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
181 change_gid = preserve_gid && file->gid != (gid_t) -1 && \
182 st->st_gid != file->gid;
183 if (change_gid && !am_root) {
184 /* enforce bsd-style group semantics: non-root can only
185 change to groups that the user is a member of */
186 change_gid = is_in_group(file->gid);
188 if (change_uid || change_gid) {
190 change_uid?file->uid:st->st_uid,
191 change_gid?file->gid:st->st_gid) != 0) {
192 /* shouldn't have attempted to change uid or gid
193 unless have the privilege */
194 rprintf(FERROR,"chown %s : %s\n", fname,strerror(errno));
197 /* a lchown had been done - we have to re-stat if the
198 destination had the setuid or setgid bits set due
199 to the side effect of the chown call */
200 if (st->st_mode & (S_ISUID | S_ISGID)) {
201 link_stat(fname, st);
207 if (!S_ISLNK(st->st_mode)) {
208 if (st->st_mode != file->mode) {
210 if (do_chmod(fname,file->mode) != 0) {
211 rprintf(FERROR,"failed to set permissions on %s : %s\n",
212 fname,strerror(errno));
219 if (verbose > 1 && report) {
221 rprintf(FINFO,"%s\n",fname);
223 rprintf(FINFO,"%s is uptodate\n",fname);
231 exit_cleanup(RERR_SIGNAL);
235 /* finish off a file transfer, renaming the file and setting the permissions
237 void finish_transfer(char *fname, char *fnametmp, struct file_struct *file)
239 if (make_backups && !make_backup(fname))
242 /* move tmp file over real file */
243 if (robust_rename(fnametmp,fname) != 0) {
244 if (errno == EXDEV) {
245 /* rename failed on cross-filesystem link.
246 Copy the file instead. */
247 if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) {
248 rprintf(FERROR,"copy %s -> %s : %s\n",
249 fnametmp,fname,strerror(errno));
251 set_perms(fname,file,NULL,0);
254 rprintf(FERROR,"rename %s -> %s : %s\n",
255 fnametmp,fname,strerror(errno));
259 set_perms(fname,file,NULL,0);