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 protocol_version;
27 extern int csum_length;
28 extern struct stats stats;
31 extern int relative_paths;
32 extern int preserve_hard_links;
33 extern int cvs_exclude;
36 extern char *compare_dest;
37 extern int make_backups;
38 extern int do_progress;
39 extern char *backup_dir;
40 extern char *backup_suffix;
41 extern int backup_suffix_len;
43 static struct delete_list {
47 static int dlist_len, dlist_alloc_len;
49 /* yuck! This function wouldn't have been necessary if I had the sorting
50 * algorithm right. Unfortunately fixing the sorting algorithm would introduce
51 * a backward incompatibility as file list indexes are sent over the link.
53 static int delete_already_done(struct file_list *flist,int j)
58 if (link_stat(f_name(flist->files[j]), &st)) return 1;
60 for (i = 0; i < dlist_len; i++) {
61 if (st.st_ino == delete_list[i].inode &&
62 (DEV64_T)st.st_dev == delete_list[i].dev)
69 static void add_delete_entry(struct file_struct *file)
71 if (dlist_len == dlist_alloc_len) {
72 dlist_alloc_len += 1024;
73 delete_list = realloc_array(delete_list, struct delete_list,
75 if (!delete_list) out_of_memory("add_delete_entry");
78 delete_list[dlist_len].dev = file->dev;
79 delete_list[dlist_len].inode = file->inode;
83 rprintf(FINFO,"added %s to delete list\n", f_name(file));
86 static void delete_one(char *fn, int is_dir)
89 if (robust_unlink(fn) != 0) {
90 rprintf(FERROR, "delete_one: unlink %s failed: %s\n",
91 full_fname(fn), strerror(errno));
93 rprintf(FINFO, "deleting %s\n", fn);
96 if (do_rmdir(fn) != 0) {
97 if (errno != ENOTEMPTY && errno != EEXIST) {
98 rprintf(FERROR, "delete_one: rmdir %s failed: %s\n",
99 full_fname(fn), strerror(errno));
101 } else if (verbose) {
102 rprintf(FINFO, "deleting directory %s\n", fn);
108 static int is_backup_file(char *fn)
110 int k = strlen(fn) - backup_suffix_len;
111 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
115 /* this deletes any files on the receiving side that are not present
116 * on the sending side. For version 1.6.4 I have changed the behaviour
117 * to match more closely what most people seem to expect of this option */
118 void delete_files(struct file_list *flist)
120 struct file_list *local_file_list;
123 extern int module_id;
124 extern int ignore_errors;
125 extern int max_delete;
126 static int deletion_count;
131 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
132 rprintf(FINFO,"IO error encountered - skipping file deletion\n");
136 for (j=0;j<flist->count;j++) {
137 if (!S_ISDIR(flist->files[j]->mode) ||
138 !(flist->files[j]->flags & FLAG_DELETE)) continue;
140 if (protocol_version < 19 &&
141 delete_already_done(flist, j)) continue;
143 name = strdup(f_name(flist->files[j]));
145 if (!(local_file_list = send_file_list(-1,1,&name))) {
151 rprintf(FINFO,"deleting in %s\n", name);
153 for (i=local_file_list->count-1;i>=0;i--) {
154 if (max_delete && deletion_count > max_delete) break;
155 if (!local_file_list->files[i]->basename) continue;
156 if (protocol_version < 19 &&
157 S_ISDIR(local_file_list->files[i]->mode))
158 add_delete_entry(local_file_list->files[i]);
159 if (-1 == flist_find(flist,local_file_list->files[i])) {
160 char *f = f_name(local_file_list->files[i]);
161 if (make_backups && (backup_dir || !is_backup_file(f))) {
162 (void) make_backup(f);
164 rprintf(FINFO, "deleting %s\n", f);
166 int mode = local_file_list->files[i]->mode;
167 delete_one(f, S_ISDIR(mode) != 0);
172 flist_free(local_file_list);
179 * get_tmpname() - create a tmp filename for a given filename
181 * If a tmpdir is defined, use that as the directory to
182 * put it in. Otherwise, the tmp filename is in the same
183 * directory as the given name. Note that there may be no
184 * directory at all in the given name!
186 * The tmp filename is basically the given filename with a
187 * dot prepended, and .XXXXXX appended (for mkstemp() to
188 * put its unique gunk in). Take care to not exceed
189 * either the MAXPATHLEN or NAME_MAX, esp. the last, as
190 * the basename basically becomes 8 chars longer. In that
191 * case, the original name is shortened sufficiently to
194 * Of course, there's no real reason for the tmp name to
195 * look like the original, except to satisfy us humans.
196 * As long as it's unique, rsync will work.
199 static int get_tmpname(char *fnametmp, char *fname)
206 strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
207 length = strlen(fnametmp);
208 fnametmp[length++] = '/';
209 fnametmp[length] = '\0'; /* always NULL terminated */
212 if ((f = strrchr(fname, '/')) != NULL) {
216 /* copy up to and including the slash */
217 strlcpy(fnametmp, fname, length + 1);
222 fnametmp[length++] = '.';
223 fnametmp[length] = '\0'; /* always NULL terminated */
225 maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);
228 rprintf(FERROR, "temporary filename too long: %s\n", fname);
233 strlcpy(fnametmp + length, f, maxname);
234 strcat(fnametmp + length, ".XXXXXX");
240 static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname,
244 struct sum_struct sum;
249 static char file_sum1[MD4_SUM_LENGTH];
250 static char file_sum2[MD4_SUM_LENGTH];
253 read_sum_head(f_in, &sum);
257 for (i=recv_token(f_in,&data); i != 0; i=recv_token(f_in,&data)) {
259 show_progress(offset, total_size);
262 extern int cleanup_got_literal;
265 rprintf(FINFO,"data recv %d at %.0f\n",
269 stats.literal_data += i;
270 cleanup_got_literal = 1;
274 if (fd != -1 && write_file(fd,data,i) != i) {
275 rprintf(FERROR, "write failed on %s: %s\n",
276 full_fname(fname), strerror(errno));
277 exit_cleanup(RERR_FILEIO);
284 offset2 = i*(OFF_T)sum.blength;
286 if (i == (int) sum.count-1 && sum.remainder != 0)
289 stats.matched_data += len;
292 rprintf(FINFO,"chunk[%d] of size %d at %.0f offset=%.0f\n",
293 i,len,(double)offset2,(double)offset);
296 map = map_ptr(buf,offset2,len);
302 if (fd != -1 && write_file(fd,map,len) != (int) len) {
303 rprintf(FERROR, "write failed on %s: %s\n",
304 full_fname(fname), strerror(errno));
305 exit_cleanup(RERR_FILEIO);
311 end_progress(total_size);
313 if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
314 rprintf(FERROR, "write failed on %s: %s\n",
315 full_fname(fname), strerror(errno));
316 exit_cleanup(RERR_FILEIO);
321 read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
323 rprintf(FINFO,"got file_sum\n");
325 if (fd != -1 && memcmp(file_sum1,file_sum2,MD4_SUM_LENGTH) != 0) {
333 * main routine for receiver process.
335 * Receiver process runs on the same host as the generator process. */
336 int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen)
341 char template[MAXPATHLEN];
342 char fnametmp[MAXPATHLEN];
344 char fnamecmpbuf[MAXPATHLEN];
345 struct map_struct *buf;
347 struct file_struct *file;
350 extern struct stats stats;
351 extern int preserve_perms;
352 extern int delete_after;
353 extern int orig_umask;
354 struct stats initial_stats;
357 rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
367 csum_length = SUM_LENGTH;
369 rprintf(FINFO,"recv_files phase=%d\n",phase);
376 if (i < 0 || i >= flist->count) {
377 rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n",
379 exit_cleanup(RERR_PROTOCOL);
382 file = flist->files[i];
383 fname = f_name(file);
385 stats.num_transferred_files++;
386 stats.total_transferred_size += file->length;
392 if (!am_server && verbose) { /* log transfer */
393 rprintf(FINFO, "%s\n", fname);
398 initial_stats = stats;
401 rprintf(FINFO,"recv_files(%s)\n",fname);
406 fd1 = do_open(fnamecmp, O_RDONLY, 0);
408 if ((fd1 == -1) && (compare_dest != NULL)) {
409 /* try the file at compare_dest instead */
410 snprintf(fnamecmpbuf,MAXPATHLEN,"%s/%s",
412 fnamecmp = fnamecmpbuf;
413 fd1 = do_open(fnamecmp, O_RDONLY, 0);
416 if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
417 rprintf(FERROR, "fstat %s failed: %s\n",
418 full_fname(fnamecmp), strerror(errno));
419 receive_data(f_in,NULL,-1,NULL,file->length);
424 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
425 /* this special handling for directories
426 * wouldn't be necessary if robust_rename()
427 * and the underlying robust_unlink could cope
430 rprintf(FERROR,"recv_files: %s is a directory\n",
431 full_fname(fnamecmp));
432 receive_data(f_in, NULL, -1, NULL, file->length);
437 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
443 if (fd1 != -1 && !preserve_perms) {
444 /* if the file exists already and we aren't preserving
445 * permissions then act as though the remote end sent
446 * us the file permissions we already have */
447 file->mode = st.st_mode;
450 if (fd1 != -1 && st.st_size > 0) {
451 buf = map_file(fd1,st.st_size);
453 rprintf(FINFO,"recv mapped %s of size %.0f\n",fnamecmp,(double)st.st_size);
458 if (!get_tmpname(fnametmp,fname)) {
459 if (buf) unmap_file(buf);
460 if (fd1 != -1) close(fd1);
464 strlcpy(template, fnametmp, sizeof(template));
466 /* we initially set the perms without the
467 * setuid/setgid bits to ensure that there is no race
468 * condition. They are then correctly updated after
469 * the lchown. Thanks to snabb@epipe.fi for pointing
470 * this out. We also set it initially without group
471 * access because of a similar race condition. */
472 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
474 /* in most cases parent directories will already exist
475 * because their information should have been previously
476 * transferred, but that may not be the case with -R */
477 if (fd2 == -1 && relative_paths && errno == ENOENT &&
478 create_directory_path(fnametmp, orig_umask) == 0) {
479 strlcpy(fnametmp, template, sizeof(fnametmp));
480 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
483 rprintf(FERROR, "mkstemp %s failed: %s\n",
484 full_fname(fnametmp), strerror(errno));
485 receive_data(f_in,buf,-1,NULL,file->length);
486 if (buf) unmap_file(buf);
487 if (fd1 != -1) close(fd1);
491 cleanup_set(fnametmp, fname, file, buf, fd1, fd2);
493 if (!am_server && verbose) { /* log transfer */
494 rprintf(FINFO, "%s\n", fname);
498 recv_ok = receive_data(f_in,buf,fd2,fname,file->length);
500 log_recv(file, &initial_stats);
502 if (buf) unmap_file(buf);
509 rprintf(FINFO,"renaming %s to %s\n",fnametmp,fname);
511 finish_transfer(fname, fnametmp, file);
516 if (csum_length == SUM_LENGTH) {
517 rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n",
521 rprintf(FINFO,"redoing %s(%d)\n",fname,i);
528 if (recurse && delete_mode && !local_name && flist->count>0) {
533 if (preserve_hard_links)
536 /* now we need to fix any directory permissions that were
537 * modified during the transfer */
538 for (i = 0; i < flist->count; i++) {
539 file = flist->files[i];
540 if (!file->basename || !S_ISDIR(file->mode)) continue;
541 recv_generator(local_name?local_name:f_name(file),flist,i,-1);
545 rprintf(FINFO,"recv_files finished\n");