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 keep_dirlinks;
34 extern int preserve_hard_links;
35 extern int preserve_perms;
36 extern int cvs_exclude;
39 extern char *compare_dest;
40 extern int make_backups;
41 extern int do_progress;
42 extern char *backup_dir;
43 extern char *backup_suffix;
44 extern int backup_suffix_len;
45 extern int cleanup_got_literal;
47 extern int ignore_errors;
48 extern int orig_umask;
49 extern int keep_partial;
50 extern int checksum_seed;
53 static void delete_one(char *fn, int is_dir)
56 if (robust_unlink(fn) != 0) {
57 rsyserr(FERROR, errno, "delete_one: unlink %s failed",
60 rprintf(FINFO, "deleting %s\n", fn);
62 if (do_rmdir(fn) != 0) {
63 if (errno == ENOTDIR && keep_dirlinks) {
67 if (errno != ENOTEMPTY && errno != EEXIST) {
68 rsyserr(FERROR, errno,
69 "delete_one: rmdir %s failed",
73 rprintf(FINFO, "deleting directory %s\n", fn);
78 static int is_backup_file(char *fn)
80 int k = strlen(fn) - backup_suffix_len;
81 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
85 /* This deletes any files on the receiving side that are not present
86 * on the sending side. */
87 void delete_files(struct file_list *flist)
89 struct file_list *local_file_list;
91 char *argv[1], fbuf[MAXPATHLEN];
92 static int deletion_count;
97 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
98 rprintf(FINFO,"IO error encountered - skipping file deletion\n");
102 for (j = 0; j < flist->count; j++) {
103 if (!(flist->files[j]->flags & FLAG_TOP_DIR)
104 || !S_ISDIR(flist->files[j]->mode))
107 argv[0] = f_name_to(flist->files[j], fbuf);
109 if (!(local_file_list = send_file_list(-1, 1, argv)))
113 rprintf(FINFO, "deleting in %s\n", fbuf);
115 for (i = local_file_list->count-1; i >= 0; i--) {
116 if (max_delete && deletion_count > max_delete)
118 if (!local_file_list->files[i]->basename)
120 if (flist_find(flist,local_file_list->files[i]) < 0) {
121 char *f = f_name(local_file_list->files[i]);
122 if (make_backups && (backup_dir || !is_backup_file(f))) {
125 rprintf(FINFO, "deleting %s\n", f);
127 int mode = local_file_list->files[i]->mode;
128 delete_one(f, S_ISDIR(mode) != 0);
133 flist_free(local_file_list);
139 * get_tmpname() - create a tmp filename for a given filename
141 * If a tmpdir is defined, use that as the directory to
142 * put it in. Otherwise, the tmp filename is in the same
143 * directory as the given name. Note that there may be no
144 * directory at all in the given name!
146 * The tmp filename is basically the given filename with a
147 * dot prepended, and .XXXXXX appended (for mkstemp() to
148 * put its unique gunk in). Take care to not exceed
149 * either the MAXPATHLEN or NAME_MAX, esp. the last, as
150 * the basename basically becomes 8 chars longer. In that
151 * case, the original name is shortened sufficiently to
154 * Of course, there's no real reason for the tmp name to
155 * look like the original, except to satisfy us humans.
156 * As long as it's unique, rsync will work.
159 static int get_tmpname(char *fnametmp, char *fname)
166 /* Note: this can't overflow, so the return value is safe */
167 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
168 fnametmp[length++] = '/';
169 fnametmp[length] = '\0'; /* always NULL terminated */
172 if ((f = strrchr(fname, '/')) != NULL) {
176 /* copy up to and including the slash */
177 strlcpy(fnametmp, fname, length + 1);
181 fnametmp[length++] = '.';
182 fnametmp[length] = '\0'; /* always NULL terminated */
184 maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);
187 rprintf(FERROR, "temporary filename too long: %s\n", fname);
192 strlcpy(fnametmp + length, f, maxname);
193 strcat(fnametmp + length, ".XXXXXX");
199 static int receive_data(int f_in,struct map_struct *mapbuf,int fd,char *fname,
203 struct sum_struct sum;
208 static char file_sum1[MD4_SUM_LENGTH];
209 static char file_sum2[MD4_SUM_LENGTH];
212 read_sum_head(f_in, &sum);
214 sum_init(checksum_seed);
216 while ((i = recv_token(f_in, &data)) != 0) {
218 show_progress(offset, total_size);
222 rprintf(FINFO,"data recv %d at %.0f\n",
226 stats.literal_data += i;
227 cleanup_got_literal = 1;
231 if (fd != -1 && write_file(fd,data,i) != i) {
232 rsyserr(FERROR, errno, "write failed on %s",
234 exit_cleanup(RERR_FILEIO);
241 offset2 = i*(OFF_T)sum.blength;
243 if (i == (int)sum.count-1 && sum.remainder != 0)
246 stats.matched_data += len;
249 rprintf(FINFO,"chunk[%d] of size %d at %.0f offset=%.0f\n",
250 i,len,(double)offset2,(double)offset);
253 map = map_ptr(mapbuf,offset2,len);
259 if (!inplace || offset != offset2) {
260 if (fd != -1 && write_file(fd, map, len) != (int)len) {
261 rsyserr(FERROR, errno, "write failed on %s",
263 exit_cleanup(RERR_FILEIO);
266 flush_write_file(fd);
267 if (do_lseek(fd,(OFF_T)len,SEEK_CUR) != offset+len) {
268 rprintf(FERROR, "lseek failed on %s: %s, %lli, %lli, %i\n",
269 full_fname(fname), strerror(errno), do_lseek(fd,0,SEEK_CUR), (offset+len), i);
270 exit_cleanup(RERR_FILEIO);
276 flush_write_file(fd);
278 #ifdef HAVE_FTRUNCATE
280 ftruncate(fd, offset);
284 end_progress(total_size);
286 if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
287 rsyserr(FERROR, errno, "write failed on %s",
289 exit_cleanup(RERR_FILEIO);
294 read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
296 rprintf(FINFO,"got file_sum\n");
297 if (fd != -1 && memcmp(file_sum1, file_sum2, MD4_SUM_LENGTH) != 0)
304 * main routine for receiver process.
306 * Receiver process runs on the same host as the generator process. */
307 int recv_files(int f_in, struct file_list *flist, char *local_name)
311 char *fname, fbuf[MAXPATHLEN];
312 char template[MAXPATHLEN];
313 char fnametmp[MAXPATHLEN];
315 char fnamecmpbuf[MAXPATHLEN];
316 struct map_struct *mapbuf;
317 struct file_struct *file;
318 struct stats initial_stats;
319 int save_make_backups = make_backups;
320 int i, recv_ok, phase = 0;
323 rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
325 if (flist->hlink_pool) {
326 pool_destroy(flist->hlink_pool);
327 flist->hlink_pool = NULL;
338 csum_length = SUM_LENGTH;
340 rprintf(FINFO, "recv_files phase=%d\n", phase);
341 send_msg(MSG_DONE, "", 0);
343 make_backups = 0; /* prevents double backup */
347 if (i < 0 || i >= flist->count) {
348 rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n",
350 exit_cleanup(RERR_PROTOCOL);
353 file = flist->files[i];
355 stats.current_file_index = i;
356 stats.num_transferred_files++;
357 stats.total_transferred_size += file->length;
358 cleanup_got_literal = 0;
363 fname = f_name_to(file, fbuf);
366 if (!am_server && verbose)
367 rprintf(FINFO, "%s\n", fname);
371 initial_stats = stats;
374 rprintf(FINFO,"recv_files(%s)\n",fname);
379 fd1 = do_open(fnamecmp, O_RDONLY, 0);
381 if (fd1 == -1 && compare_dest != NULL) {
382 /* try the file at compare_dest instead */
383 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
384 compare_dest, fname);
385 fnamecmp = fnamecmpbuf;
386 fd1 = do_open(fnamecmp, O_RDONLY, 0);
389 if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
390 rsyserr(FERROR, errno, "fstat %s failed",
391 full_fname(fnamecmp));
392 receive_data(f_in,NULL,-1,NULL,file->length);
397 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
398 /* this special handling for directories
399 * wouldn't be necessary if robust_rename()
400 * and the underlying robust_unlink could cope
403 rprintf(FERROR,"recv_files: %s is a directory\n",
404 full_fname(fnamecmp));
405 receive_data(f_in, NULL, -1, NULL, file->length);
410 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
416 if (fd1 != -1 && !preserve_perms) {
417 /* if the file exists already and we aren't preserving
418 * permissions then act as though the remote end sent
419 * us the file permissions we already have */
420 file->mode = st.st_mode;
423 if (fd1 != -1 && st.st_size > 0) {
424 mapbuf = map_file(fd1,st.st_size);
426 rprintf(FINFO, "recv mapped %s of size %.0f\n",
427 fnamecmp, (double)st.st_size);
432 /* We now check to see if we are writing file "inplace" */
434 fd2 = do_open(fnamecmp, O_WRONLY|O_CREAT, 0);
436 rsyserr(FERROR, errno, "open %s failed",
437 full_fname(fnamecmp));
438 receive_data(f_in,mapbuf,-1,NULL,file->length);
446 if (!get_tmpname(fnametmp,fname)) {
454 strlcpy(template, fnametmp, sizeof template);
456 /* we initially set the perms without the
457 * setuid/setgid bits to ensure that there is no race
458 * condition. They are then correctly updated after
459 * the lchown. Thanks to snabb@epipe.fi for pointing
460 * this out. We also set it initially without group
461 * access because of a similar race condition. */
462 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
464 /* in most cases parent directories will already exist
465 * because their information should have been previously
466 * transferred, but that may not be the case with -R */
467 if (fd2 == -1 && relative_paths && errno == ENOENT
468 && create_directory_path(fnametmp, orig_umask) == 0) {
469 strlcpy(fnametmp, template, sizeof fnametmp);
470 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
473 rsyserr(FERROR, errno, "mkstemp %s failed",
474 full_fname(fnametmp));
475 receive_data(f_in,mapbuf,-1,NULL,file->length);
483 cleanup_set(fnametmp, fname, file, mapbuf, fd1, fd2);
486 if (!am_server && verbose)
487 rprintf(FINFO, "%s\n", fname);
490 recv_ok = receive_data(f_in,mapbuf,fd2,fname,file->length);
492 log_recv(file, &initial_stats);
498 if (close(fd2) < 0) {
499 rsyserr(FERROR, errno, "close failed on %s",
500 full_fname(fnametmp));
501 exit_cleanup(RERR_FILEIO);
504 if (recv_ok || keep_partial)
505 finish_transfer(fname, fnametmp, file, recv_ok);
512 if (csum_length == SUM_LENGTH) {
513 rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n",
518 rprintf(FINFO,"redoing %s(%d)\n",fname,i);
520 send_msg(MSG_REDO, buf, 4);
524 make_backups = save_make_backups;
526 if (delete_after && recurse && delete_mode && !local_name
531 rprintf(FINFO,"recv_files finished\n");