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;
60 ret = do_lstat(fname, &st);
62 ret = do_stat(fname, &st);
65 rprintf(FERROR,"stat(%s) : %s\n", fname, strerror(errno));
69 if (!S_ISDIR(st.st_mode)) {
70 if (robust_unlink(fname) == 0 || errno == ENOENT) return 0;
71 rprintf(FERROR,"unlink(%s) : %s\n", 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,"rmdir(%s) : %s\n", fname, strerror(errno));
82 /* now we do a recsursive delete on the directory ... */
85 rprintf(FERROR,"opendir(%s): %s\n",
86 fname,strerror(errno));
90 for (di=readdir(d); di; di=readdir(d)) {
91 char *dname = d_name(di);
92 if (strcmp(dname,".")==0 ||
93 strcmp(dname,"..")==0)
95 slprintf(buf, sizeof(buf), "%s/%s", fname, dname);
97 rprintf(FINFO,"deleting %s\n", buf);
98 if (delete_file(buf) != 0) {
106 if (do_rmdir(fname) != 0) {
107 rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
114 static int is_in_group(gid_t gid)
117 static gid_t last_in = (gid_t) -2, last_out;
118 static int ngroups = -2;
119 static GETGROUPS_T *gidset;
125 /* treat failure (-1) as if not member of any group */
126 ngroups = getgroups(0, 0);
128 gidset = (GETGROUPS_T *) malloc(ngroups * sizeof(GETGROUPS_T));
129 ngroups = getgroups(ngroups, gidset);
135 for (n = 0; n < ngroups; n++) {
136 if (gidset[n] == gid) {
148 int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
153 int change_uid, change_gid;
155 if (dry_run) return 0;
158 if (link_stat(fname,&st2) != 0) {
159 rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno));
165 if (preserve_times && !S_ISLNK(st->st_mode) &&
166 st->st_mtime != file->modtime) {
167 /* don't complain about not setting times on directories
168 because some filesystems can't do it */
169 if (set_modtime(fname,file->modtime) != 0 &&
170 !S_ISDIR(st->st_mode)) {
171 rprintf(FERROR,"failed to set times on %s : %s\n",
172 fname,strerror(errno));
179 change_uid = am_root && preserve_uid && st->st_uid != file->uid;
180 change_gid = preserve_gid && file->gid != (gid_t) -1 && \
181 st->st_gid != file->gid;
182 if (change_gid && !am_root) {
183 /* enforce bsd-style group semantics: non-root can only
184 change to groups that the user is a member of */
185 change_gid = is_in_group(file->gid);
187 if (change_uid || change_gid) {
189 change_uid?file->uid:st->st_uid,
190 change_gid?file->gid:st->st_gid) != 0) {
191 /* shouldn't have attempted to change uid or gid
192 unless have the privilege */
193 rprintf(FERROR,"chown %s : %s\n", fname,strerror(errno));
196 /* a lchown had been done - we have to re-stat if the
197 destination had the setuid or setgid bits set due
198 to the side effect of the chown call */
199 if (st->st_mode & (S_ISUID | S_ISGID)) {
200 link_stat(fname, st);
206 if (!S_ISLNK(st->st_mode)) {
207 if (st->st_mode != file->mode) {
209 if (do_chmod(fname,file->mode) != 0) {
210 rprintf(FERROR,"failed to set permissions on %s : %s\n",
211 fname,strerror(errno));
218 if (verbose > 1 && report) {
220 rprintf(FINFO,"%s\n",fname);
222 rprintf(FINFO,"%s is uptodate\n",fname);
230 exit_cleanup(RERR_SIGNAL);
234 /* finish off a file transfer, renaming the file and setting the permissions
236 void finish_transfer(char *fname, char *fnametmp, struct file_struct *file)
238 if (make_backups && !make_backup(fname))
241 /* move tmp file over real file */
242 if (robust_rename(fnametmp,fname) != 0) {
243 if (errno == EXDEV) {
244 /* rename failed on cross-filesystem link.
245 Copy the file instead. */
246 if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) {
247 rprintf(FERROR,"copy %s -> %s : %s\n",
248 fnametmp,fname,strerror(errno));
250 set_perms(fname,file,NULL,0);
253 rprintf(FERROR,"rename %s -> %s : %s\n",
254 fnametmp,fname,strerror(errno));
258 set_perms(fname,file,NULL,0);