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.
24 extern int log_before_transfer;
25 extern int itemize_changes;
26 extern int delete_after;
27 extern int csum_length;
28 extern struct stats stats;
30 extern int read_batch;
31 extern int batch_gen_fd;
33 extern int protocol_version;
34 extern int relative_paths;
35 extern int keep_dirlinks;
36 extern int preserve_hard_links;
37 extern int preserve_perms;
40 extern char *partial_dir;
41 extern char *basis_dir[];
42 extern int basis_dir_cnt;
43 extern int make_backups;
44 extern int do_progress;
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;
52 extern int delay_updates;
53 extern char *log_format;
55 extern struct filter_list_struct server_filter_list;
58 /* This deletes any files on the receiving side that are not present on the
59 * sending side. This is used by --delete-before and --delete-after. */
60 void delete_files(struct file_list *flist)
62 char fbuf[MAXPATHLEN];
65 for (j = 0; j < flist->count; j++) {
66 struct file_struct *file = flist->files[j];
68 if (!(file->flags & FLAG_DEL_HERE))
71 f_name_to(file, fbuf);
72 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
73 rprintf(FINFO, "deleting in %s\n", safe_fname(fbuf));
75 delete_in_dir(flist, fbuf, file);
81 * get_tmpname() - create a tmp filename for a given filename
83 * If a tmpdir is defined, use that as the directory to
84 * put it in. Otherwise, the tmp filename is in the same
85 * directory as the given name. Note that there may be no
86 * directory at all in the given name!
88 * The tmp filename is basically the given filename with a
89 * dot prepended, and .XXXXXX appended (for mkstemp() to
90 * put its unique gunk in). Take care to not exceed
91 * either the MAXPATHLEN or NAME_MAX, esp. the last, as
92 * the basename basically becomes 8 chars longer. In that
93 * case, the original name is shortened sufficiently to
96 * Of course, there's no real reason for the tmp name to
97 * look like the original, except to satisfy us humans.
98 * As long as it's unique, rsync will work.
101 static int get_tmpname(char *fnametmp, char *fname)
108 /* Note: this can't overflow, so the return value is safe */
109 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
110 fnametmp[length++] = '/';
111 fnametmp[length] = '\0'; /* always NULL terminated */
114 if ((f = strrchr(fname, '/')) != NULL) {
118 /* copy up to and including the slash */
119 strlcpy(fnametmp, fname, length + 1);
123 fnametmp[length++] = '.';
124 fnametmp[length] = '\0'; /* always NULL terminated */
126 maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);
129 rprintf(FERROR, "temporary filename too long: %s\n",
135 strlcpy(fnametmp + length, f, maxname);
136 strcat(fnametmp + length, ".XXXXXX");
142 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
143 char *fname, int fd, OFF_T total_size)
145 static char file_sum1[MD4_SUM_LENGTH];
146 static char file_sum2[MD4_SUM_LENGTH];
147 struct map_struct *mapbuf;
148 struct sum_struct sum;
156 read_sum_head(f_in, &sum);
158 if (fd_r >= 0 && size_r > 0) {
159 int32 read_size = MAX(sum.blength * 2, 16*1024);
160 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
162 rprintf(FINFO, "recv mapped %s of size %.0f\n",
163 safe_fname(fname_r), (double)size_r);
168 sum_init(checksum_seed);
170 while ((i = recv_token(f_in, &data)) != 0) {
172 show_progress(offset, total_size);
176 rprintf(FINFO,"data recv %d at %.0f\n",
180 stats.literal_data += i;
181 cleanup_got_literal = 1;
185 if (fd != -1 && write_file(fd,data,i) != i)
186 goto report_write_error;
192 offset2 = i * (OFF_T)sum.blength;
194 if (i == (int)sum.count-1 && sum.remainder != 0)
197 stats.matched_data += len;
201 "chunk[%d] of size %ld at %.0f offset=%.0f\n",
202 i, (long)len, (double)offset2, (double)offset);
206 map = map_ptr(mapbuf,offset2,len);
209 sum_update(map, len);
213 if (offset == offset2 && fd != -1) {
214 if (flush_write_file(fd) < 0)
215 goto report_write_error;
217 if (do_lseek(fd, len, SEEK_CUR) != offset) {
218 rsyserr(FERROR, errno,
219 "lseek failed on %s",
221 exit_cleanup(RERR_FILEIO);
226 if (fd != -1 && write_file(fd, map, len) != (int)len)
227 goto report_write_error;
231 if (flush_write_file(fd) < 0)
232 goto report_write_error;
234 #ifdef HAVE_FTRUNCATE
235 if (inplace && fd != -1)
236 ftruncate(fd, offset);
240 end_progress(total_size);
242 if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
244 rsyserr(FERROR, errno, "write failed on %s",
246 exit_cleanup(RERR_FILEIO);
254 read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
256 rprintf(FINFO,"got file_sum\n");
257 if (fd != -1 && memcmp(file_sum1, file_sum2, MD4_SUM_LENGTH) != 0)
263 static void read_gen_name(int fd, char *dirname, char *buf)
266 int len = read_byte(fd);
269 #if MAXPATHLEN > 32767
271 read_buf(fd, (char *)lenbuf, 2);
272 len = (len & ~0x80) * 0x10000 + lenbuf[0] * 0x100 + lenbuf[1];
274 len = (len & ~0x80) * 0x100 + read_byte(fd);
279 dlen = strlcpy(buf, dirname, MAXPATHLEN);
284 if (dlen + len >= MAXPATHLEN) {
285 rprintf(FERROR, "bogus data on generator name pipe\n");
286 exit_cleanup(RERR_PROTOCOL);
289 read_sbuf(fd, buf + dlen, len);
293 static void discard_receive_data(int f_in, OFF_T length)
295 receive_data(f_in, NULL, -1, 0, NULL, -1, length);
300 * main routine for receiver process.
302 * Receiver process runs on the same host as the generator process. */
303 int recv_files(int f_in, struct file_list *flist, char *local_name,
310 char *fname, fbuf[MAXPATHLEN];
311 char template[MAXPATHLEN];
312 char fnametmp[MAXPATHLEN];
313 char *fnamecmp, *partialptr;
314 char fnamecmpbuf[MAXPATHLEN];
315 uchar *delayed_bits = NULL;
316 struct file_struct *file;
317 struct stats initial_stats;
318 int save_make_backups = make_backups;
319 int i, recv_ok, phase = 0;
322 rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
324 if (flist->hlink_pool) {
325 pool_destroy(flist->hlink_pool);
326 flist->hlink_pool = NULL;
330 int sz = (flist->count + 7) / 8;
331 if (!(delayed_bits = new_array(uchar, sz)))
332 out_of_memory("recv_files");
333 memset(delayed_bits, 0, sz);
342 if (next_gen_i != flist->count) {
346 read_byte(f_in_name);
347 } while (read_int(batch_gen_fd) != -1);
356 csum_length = SUM_LENGTH;
358 rprintf(FINFO, "recv_files phase=%d\n", phase);
359 send_msg(MSG_DONE, "", 0);
360 if (keep_partial && !partial_dir)
361 make_backups = 0; /* prevents double backup */
365 if (i < 0 || i >= flist->count) {
366 rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n",
368 exit_cleanup(RERR_PROTOCOL);
371 file = flist->files[i];
373 if (protocol_version >= 29) {
374 iflags = read_shortint(f_in);
375 if (!(iflags & ITEM_UPDATING) || !S_ISREG(file->mode)) {
378 else if (itemize_changes || verbose > 1
379 || iflags & ITEM_UPDATING
380 || (S_ISDIR(file->mode)
381 && iflags & ITEM_REPORT_TIME))
382 log_recv(file, &stats, iflags);
386 iflags = ITEM_UPDATING | ITEM_MISSING_DATA;
388 if (!S_ISREG(file->mode)) {
389 rprintf(FERROR, "[%s] got index of non-regular file: %d\n",
391 exit_cleanup(RERR_PROTOCOL);
394 stats.current_file_index = i;
395 stats.num_transferred_files++;
396 stats.total_transferred_size += file->length;
397 cleanup_got_literal = 0;
399 fname = local_name ? local_name : f_name_to(file, fbuf);
401 if (server_filter_list.head
402 && check_filter(&server_filter_list, fname, 0) < 0) {
403 rprintf(FERROR, "attempt to hack rsync failed.\n");
404 exit_cleanup(RERR_PROTOCOL);
408 rprintf(FINFO, "recv_files(%s)\n", safe_fname(fname));
410 if (dry_run) { /* log the transfer */
411 if (!am_server && log_format)
412 log_recv(file, &stats, iflags);
417 while (i > next_gen_i) {
418 if (f_in_name >= 0 && next_gen_i >= 0)
419 read_byte(f_in_name);
420 next_gen_i = read_int(batch_gen_fd);
421 if (next_gen_i == -1)
422 next_gen_i = flist->count;
424 if (i < next_gen_i) {
425 rprintf(FINFO, "skipping update for \"%s\"\n",
427 discard_receive_data(f_in, file->length);
433 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
435 if (f_in_name >= 0) {
437 switch (j = read_byte(f_in_name)) {
441 case FNAMECMP_PARTIAL_DIR:
442 fnamecmp = partialptr ? partialptr : fname;
444 case FNAMECMP_BACKUP:
445 fnamecmp = get_backup_name(fname);
448 read_gen_name(f_in_name, file->dirname, fnamecmpbuf);
449 fnamecmp = fnamecmpbuf;
452 if (j >= basis_dir_cnt) {
454 "invalid basis_dir index: %d.\n",
456 exit_cleanup(RERR_PROTOCOL);
458 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
459 basis_dir[j], fname);
460 fnamecmp = fnamecmpbuf;
466 initial_stats = stats;
469 fd1 = do_open(fnamecmp, O_RDONLY, 0);
471 if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
472 rsyserr(FERROR, errno, "fstat %s failed",
473 full_fname(fnamecmp));
474 discard_receive_data(f_in, file->length);
479 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
480 /* this special handling for directories
481 * wouldn't be necessary if robust_rename()
482 * and the underlying robust_unlink could cope
485 rprintf(FERROR,"recv_files: %s is a directory\n",
486 full_fname(fnamecmp));
487 discard_receive_data(f_in, file->length);
492 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
497 if (fd1 != -1 && !preserve_perms) {
498 /* if the file exists already and we aren't preserving
499 * permissions then act as though the remote end sent
500 * us the file permissions we already have */
501 file->mode = st.st_mode;
504 /* We now check to see if we are writing file "inplace" */
506 fd2 = do_open(fname, O_WRONLY|O_CREAT, 0);
508 rsyserr(FERROR, errno, "open %s failed",
510 discard_receive_data(f_in, file->length);
516 if (!get_tmpname(fnametmp,fname)) {
517 discard_receive_data(f_in, file->length);
523 strlcpy(template, fnametmp, sizeof template);
525 /* we initially set the perms without the
526 * setuid/setgid bits to ensure that there is no race
527 * condition. They are then correctly updated after
528 * the lchown. Thanks to snabb@epipe.fi for pointing
529 * this out. We also set it initially without group
530 * access because of a similar race condition. */
531 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
533 /* in most cases parent directories will already exist
534 * because their information should have been previously
535 * transferred, but that may not be the case with -R */
536 if (fd2 == -1 && relative_paths && errno == ENOENT
537 && create_directory_path(fnametmp, orig_umask) == 0) {
538 strlcpy(fnametmp, template, sizeof fnametmp);
539 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
542 rsyserr(FERROR, errno, "mkstemp %s failed",
543 full_fname(fnametmp));
544 discard_receive_data(f_in, file->length);
551 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
554 /* log the transfer */
555 if (log_before_transfer)
556 log_recv(file, &initial_stats, iflags);
557 else if (!am_server && verbose && do_progress)
558 rprintf(FINFO, "%s\n", safe_fname(fname));
561 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
562 fname, fd2, file->length);
564 if (!log_before_transfer)
565 log_recv(file, &initial_stats, iflags);
569 if (close(fd2) < 0) {
570 rsyserr(FERROR, errno, "close failed on %s",
571 full_fname(fnametmp));
572 exit_cleanup(RERR_FILEIO);
575 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
576 finish_transfer(fname, fnametmp, file, recv_ok, 1);
577 if (partialptr != fname && fnamecmp == partialptr) {
578 do_unlink(partialptr);
579 handle_partial_dir(partialptr, PDIR_DELETE);
581 } else if (keep_partial && partialptr
582 && handle_partial_dir(partialptr, PDIR_CREATE)) {
583 finish_transfer(partialptr, fnametmp, file, recv_ok,
585 if (delay_updates && recv_ok)
586 delayed_bits[i/8] |= 1 << (i % 8);
595 int msgtype = csum_length == SUM_LENGTH || read_batch ?
597 if (msgtype == FERROR || verbose) {
598 char *errstr, *redostr, *keptstr;
599 if (!(keep_partial && partialptr) && !inplace)
600 keptstr = "discarded";
601 else if (partial_dir)
602 keptstr = "put into partial-dir";
604 keptstr = "retained";
605 if (msgtype == FERROR) {
610 redostr = " (will try again)";
613 "%s: %s failed verification -- update %s%s.\n",
614 errstr, safe_fname(fname),
617 if (csum_length != SUM_LENGTH) {
620 send_msg(MSG_REDO, buf, 4);
624 make_backups = save_make_backups;
627 for (i = 0; i < flist->count; i++) {
628 struct file_struct *file = flist->files[i];
630 || !(delayed_bits[i/8] & (1 << (i % 8))))
632 fname = local_name ? local_name : f_name(file);
633 partialptr = partial_dir_fname(fname);
635 if (make_backups && !make_backup(fname))
638 rprintf(FINFO, "renaming %s to %s\n",
639 safe_fname(partialptr),
642 if (do_rename(partialptr, fname) < 0) {
643 rsyserr(FERROR, errno,
644 "rename failed for %s (from %s)",
646 safe_fname(partialptr));
648 handle_partial_dir(partialptr,
655 if (delete_after && !local_name && flist->count > 0)
659 rprintf(FINFO,"recv_files finished\n");