1 /* -*- c-file-style: "linux" -*-
3 Copyright (C) 1996-2000 by Andrew Tridgell
4 Copyright (C) Paul Mackerras 1996
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 extern int delete_mode;
26 extern int delete_after;
27 extern int max_delete;
28 extern int csum_length;
29 extern struct stats stats;
32 extern int relative_paths;
33 extern int preserve_hard_links;
34 extern int preserve_perms;
35 extern int cvs_exclude;
38 extern char *compare_dest;
39 extern int make_backups;
40 extern int do_progress;
41 extern char *backup_dir;
42 extern char *backup_suffix;
43 extern int backup_suffix_len;
44 extern int cleanup_got_literal;
46 extern int ignore_errors;
47 extern int orig_umask;
48 extern int keep_partial;
50 static void delete_one(char *fn, int is_dir)
53 if (robust_unlink(fn) != 0) {
54 rsyserr(FERROR, errno, "delete_one: unlink %s failed",
57 rprintf(FINFO, "deleting %s\n", fn);
60 if (do_rmdir(fn) != 0) {
61 if (errno != ENOTEMPTY && errno != EEXIST) {
62 rsyserr(FERROR, errno,
63 "delete_one: rmdir %s failed",
67 rprintf(FINFO, "deleting directory %s\n", fn);
73 static int is_backup_file(char *fn)
75 int k = strlen(fn) - backup_suffix_len;
76 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
80 /* This deletes any files on the receiving side that are not present
81 * on the sending side. */
82 void delete_files(struct file_list *flist)
84 struct file_list *local_file_list;
86 char *argv[1], fbuf[MAXPATHLEN];
87 static int deletion_count;
92 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
93 rprintf(FINFO,"IO error encountered - skipping file deletion\n");
97 for (j = 0; j < flist->count; j++) {
98 if (!(flist->files[j]->flags & FLAG_TOP_DIR)
99 || !S_ISDIR(flist->files[j]->mode))
102 argv[0] = f_name_to(flist->files[j], fbuf);
104 if (!(local_file_list = send_file_list(-1, 1, argv)))
108 rprintf(FINFO, "deleting in %s\n", fbuf);
110 for (i = local_file_list->count-1; i >= 0; i--) {
111 if (max_delete && deletion_count > max_delete)
113 if (!local_file_list->files[i]->basename)
115 if (flist_find(flist,local_file_list->files[i]) < 0) {
116 char *f = f_name(local_file_list->files[i]);
117 if (make_backups && (backup_dir || !is_backup_file(f))) {
118 (void) make_backup(f);
120 rprintf(FINFO, "deleting %s\n", f);
122 int mode = local_file_list->files[i]->mode;
123 delete_one(f, S_ISDIR(mode) != 0);
128 flist_free(local_file_list);
134 * get_tmpname() - create a tmp filename for a given filename
136 * If a tmpdir is defined, use that as the directory to
137 * put it in. Otherwise, the tmp filename is in the same
138 * directory as the given name. Note that there may be no
139 * directory at all in the given name!
141 * The tmp filename is basically the given filename with a
142 * dot prepended, and .XXXXXX appended (for mkstemp() to
143 * put its unique gunk in). Take care to not exceed
144 * either the MAXPATHLEN or NAME_MAX, esp. the last, as
145 * the basename basically becomes 8 chars longer. In that
146 * case, the original name is shortened sufficiently to
149 * Of course, there's no real reason for the tmp name to
150 * look like the original, except to satisfy us humans.
151 * As long as it's unique, rsync will work.
154 static int get_tmpname(char *fnametmp, char *fname)
161 /* Note: this can't overflow, so the return value is safe */
162 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
163 fnametmp[length++] = '/';
164 fnametmp[length] = '\0'; /* always NULL terminated */
167 if ((f = strrchr(fname, '/')) != NULL) {
171 /* copy up to and including the slash */
172 strlcpy(fnametmp, fname, length + 1);
176 fnametmp[length++] = '.';
177 fnametmp[length] = '\0'; /* always NULL terminated */
179 maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);
182 rprintf(FERROR, "temporary filename too long: %s\n", fname);
187 strlcpy(fnametmp + length, f, maxname);
188 strcat(fnametmp + length, ".XXXXXX");
194 static int receive_data(int f_in,struct map_struct *mapbuf,int fd,char *fname,
198 struct sum_struct sum;
203 static char file_sum1[MD4_SUM_LENGTH];
204 static char file_sum2[MD4_SUM_LENGTH];
207 read_sum_head(f_in, &sum);
211 while ((i = recv_token(f_in, &data)) != 0) {
213 show_progress(offset, total_size);
217 rprintf(FINFO,"data recv %d at %.0f\n",
221 stats.literal_data += i;
222 cleanup_got_literal = 1;
226 if (fd != -1 && write_file(fd,data,i) != i) {
227 rsyserr(FERROR, errno, "write failed on %s",
229 exit_cleanup(RERR_FILEIO);
236 offset2 = i*(OFF_T)sum.blength;
238 if (i == (int) sum.count-1 && sum.remainder != 0)
241 stats.matched_data += len;
244 rprintf(FINFO,"chunk[%d] of size %d at %.0f offset=%.0f\n",
245 i,len,(double)offset2,(double)offset);
248 map = map_ptr(mapbuf,offset2,len);
254 if (fd != -1 && write_file(fd,map,len) != (int) len) {
255 rsyserr(FERROR, errno, "write failed on %s",
257 exit_cleanup(RERR_FILEIO);
262 flush_write_file(fd);
265 end_progress(total_size);
267 if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
268 rsyserr(FERROR, errno, "write failed on %s",
270 exit_cleanup(RERR_FILEIO);
275 read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
277 rprintf(FINFO,"got file_sum\n");
279 if (fd != -1 && memcmp(file_sum1,file_sum2,MD4_SUM_LENGTH) != 0) {
287 * main routine for receiver process.
289 * Receiver process runs on the same host as the generator process. */
290 int recv_files(int f_in,struct file_list *flist,char *local_name)
294 char *fname, fbuf[MAXPATHLEN];
295 char template[MAXPATHLEN];
296 char fnametmp[MAXPATHLEN];
298 char fnamecmpbuf[MAXPATHLEN];
299 struct map_struct *mapbuf;
301 struct file_struct *file;
304 struct stats initial_stats;
307 rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
310 if (flist->hlink_pool) {
311 pool_destroy(flist->hlink_pool);
312 flist->hlink_pool = NULL;
322 csum_length = SUM_LENGTH;
324 rprintf(FINFO,"recv_files phase=%d\n",phase);
325 send_msg(MSG_DONE, "", 0);
331 if (i < 0 || i >= flist->count) {
332 rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n",
334 exit_cleanup(RERR_PROTOCOL);
337 file = flist->files[i];
339 stats.current_file_index = i;
340 stats.num_transferred_files++;
341 stats.total_transferred_size += file->length;
342 cleanup_got_literal = 0;
347 fname = f_name_to(file, fbuf);
350 if (!am_server && verbose) { /* log transfer */
351 rprintf(FINFO, "%s\n", fname);
356 initial_stats = stats;
359 rprintf(FINFO,"recv_files(%s)\n",fname);
364 fd1 = do_open(fnamecmp, O_RDONLY, 0);
366 if (fd1 == -1 && compare_dest != NULL) {
367 /* try the file at compare_dest instead */
368 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
369 compare_dest, fname);
370 fnamecmp = fnamecmpbuf;
371 fd1 = do_open(fnamecmp, O_RDONLY, 0);
374 if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
375 rsyserr(FERROR, errno, "fstat %s failed",
376 full_fname(fnamecmp));
377 receive_data(f_in,NULL,-1,NULL,file->length);
382 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
383 /* this special handling for directories
384 * wouldn't be necessary if robust_rename()
385 * and the underlying robust_unlink could cope
388 rprintf(FERROR,"recv_files: %s is a directory\n",
389 full_fname(fnamecmp));
390 receive_data(f_in, NULL, -1, NULL, file->length);
395 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
401 if (fd1 != -1 && !preserve_perms) {
402 /* if the file exists already and we aren't preserving
403 * permissions then act as though the remote end sent
404 * us the file permissions we already have */
405 file->mode = st.st_mode;
408 if (fd1 != -1 && st.st_size > 0) {
409 mapbuf = map_file(fd1,st.st_size);
411 rprintf(FINFO,"recv mapped %s of size %.0f\n",fnamecmp,(double)st.st_size);
415 if (!get_tmpname(fnametmp,fname)) {
416 if (mapbuf) unmap_file(mapbuf);
417 if (fd1 != -1) close(fd1);
421 strlcpy(template, fnametmp, sizeof template);
423 /* we initially set the perms without the
424 * setuid/setgid bits to ensure that there is no race
425 * condition. They are then correctly updated after
426 * the lchown. Thanks to snabb@epipe.fi for pointing
427 * this out. We also set it initially without group
428 * access because of a similar race condition. */
429 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
431 /* in most cases parent directories will already exist
432 * because their information should have been previously
433 * transferred, but that may not be the case with -R */
434 if (fd2 == -1 && relative_paths && errno == ENOENT &&
435 create_directory_path(fnametmp, orig_umask) == 0) {
436 strlcpy(fnametmp, template, sizeof fnametmp);
437 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
440 rsyserr(FERROR, errno, "mkstemp %s failed",
441 full_fname(fnametmp));
442 receive_data(f_in,mapbuf,-1,NULL,file->length);
443 if (mapbuf) unmap_file(mapbuf);
444 if (fd1 != -1) close(fd1);
448 cleanup_set(fnametmp, fname, file, mapbuf, fd1, fd2);
450 if (!am_server && verbose) { /* log transfer */
451 rprintf(FINFO, "%s\n", fname);
455 recv_ok = receive_data(f_in,mapbuf,fd2,fname,file->length);
457 log_recv(file, &initial_stats);
459 if (mapbuf) unmap_file(mapbuf);
463 if (close(fd2) < 0) {
464 rsyserr(FERROR, errno, "close failed on %s",
465 full_fname(fnametmp));
466 exit_cleanup(RERR_FILEIO);
470 rprintf(FINFO,"renaming %s to %s\n",fnametmp,fname);
472 if (recv_ok || keep_partial)
473 finish_transfer(fname, fnametmp, file, recv_ok);
480 if (csum_length == SUM_LENGTH) {
481 rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n",
486 rprintf(FINFO,"redoing %s(%d)\n",fname,i);
488 send_msg(MSG_REDO, buf, 4);
493 if (delete_after && recurse && delete_mode && !local_name
498 rprintf(FINFO,"recv_files finished\n");