2 * The startup routines, including main(), for rsync.
4 * Copyright (C) 1996-2001 Andrew Tridgell <tridge@samba.org>
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
7 * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
25 #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
35 extern int am_generator;
37 extern int blocking_io;
38 extern int remove_sent_files;
39 extern int daemon_over_rsh;
40 extern int need_messages_from_generator;
41 extern int kluge_around_eof;
43 extern int log_got_error;
45 extern int copy_links;
46 extern int copy_dirlinks;
47 extern int keep_dirlinks;
48 extern int preserve_hard_links;
49 extern int protocol_version;
51 extern int relative_paths;
52 extern int sanitize_paths;
53 extern int curr_dir_depth;
55 extern int rsync_port;
56 extern int whole_file;
57 extern int read_batch;
58 extern int write_batch;
60 extern int batch_gen_fd;
61 extern int filesfrom_fd;
62 extern pid_t cleanup_child_pid;
63 extern struct stats stats;
64 extern char *filesfrom_host;
65 extern char *partial_dir;
66 extern char *basis_dir[];
67 extern char *rsync_path;
68 extern char *shell_cmd;
69 extern char *batch_name;
70 extern struct filter_list_struct server_filter_list;
73 mode_t orig_umask = 0;
74 struct file_list *the_file_list;
76 /* There's probably never more than at most 2 outstanding child processes,
77 * but set it higher, just in case. */
78 #define MAXCHILDPROCS 7
81 # ifdef HAVE_SIGPROCMASK
82 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
84 # define SIGACTMASK(n,h) SIGACTION(n,h)
86 static struct sigaction sigact;
92 } pid_stat_table[MAXCHILDPROCS];
94 static time_t starttime, endtime;
95 static int64 total_read, total_written;
97 static void show_malloc_stats(void);
99 /* Works like waitpid(), but if we already harvested the child pid in our
100 * remember_children(), we succeed instead of returning an error. */
101 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
103 pid_t waited_pid = waitpid(pid, status_ptr, flags);
105 if (waited_pid == -1 && errno == ECHILD) {
106 /* Status of requested child no longer available: check to
107 * see if it was processed by remember_children(). */
109 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
110 if (pid == pid_stat_table[cnt].pid) {
111 *status_ptr = pid_stat_table[cnt].status;
112 pid_stat_table[cnt].pid = 0;
121 /* Wait for a process to exit, calling io_flush while waiting. */
122 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
127 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
129 io_flush(FULL_FLUSH);
132 /* TODO: If the child exited on a signal, then log an
133 * appropriate error message. Perhaps we should also accept a
134 * message describing the purpose of the child. Also indicate
135 * this to the caller so that they know something went wrong. */
136 if (waited_pid < 0) {
137 rsyserr(FERROR, errno, "waitpid");
138 *exit_code_ptr = RERR_WAITCHILD;
139 } else if (!WIFEXITED(status)) {
141 if (WCOREDUMP(status))
142 *exit_code_ptr = RERR_CRASHED;
145 if (WIFSIGNALED(status))
146 *exit_code_ptr = RERR_TERMINATED;
148 *exit_code_ptr = RERR_WAITCHILD;
150 *exit_code_ptr = WEXITSTATUS(status);
153 /* This function gets called from all 3 processes. We want the client side
154 * to actually output the text, but the sender is the only process that has
155 * all the stats we need. So, if we're a client sender, we do the report.
156 * If we're a server sender, we write the stats on the supplied fd. If
157 * we're the client receiver we read the stats from the supplied fd and do
158 * the report. All processes might also generate a set of debug stats, if
159 * the verbose level is high enough (this is the only thing that the
160 * generator process and the server receiver ever do here). */
161 static void handle_stats(int f)
163 endtime = time(NULL);
165 /* Cache two stats because the read/write code can change it. */
166 total_read = stats.total_read;
167 total_written = stats.total_written;
169 if (do_stats && verbose > 1) {
170 /* These come out from every process */
179 log_exit(0, __FILE__, __LINE__);
180 if (f == -1 || !am_sender)
186 write_longint(f, total_read);
187 write_longint(f, total_written);
188 write_longint(f, stats.total_size);
189 if (protocol_version >= 29) {
190 write_longint(f, stats.flist_buildtime);
191 write_longint(f, stats.flist_xfertime);
197 /* this is the client */
199 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
201 else if (!am_sender) {
202 /* Read the first two in opposite order because the meaning of
203 * read/write swaps when switching from sender to receiver. */
204 total_written = read_longint(f);
205 total_read = read_longint(f);
206 stats.total_size = read_longint(f);
207 if (protocol_version >= 29) {
208 stats.flist_buildtime = read_longint(f);
209 stats.flist_xfertime = read_longint(f);
211 } else if (write_batch) {
212 /* The --read-batch process is going to be a client
213 * receiver, so we need to give it the stats. */
214 write_longint(batch_fd, total_read);
215 write_longint(batch_fd, total_written);
216 write_longint(batch_fd, stats.total_size);
217 if (protocol_version >= 29) {
218 write_longint(batch_fd, stats.flist_buildtime);
219 write_longint(batch_fd, stats.flist_xfertime);
224 static void output_summary(void)
227 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
228 rprintf(FINFO,"Number of files transferred: %d\n",
229 stats.num_transferred_files);
230 rprintf(FINFO,"Total file size: %s bytes\n",
231 human_num(stats.total_size));
232 rprintf(FINFO,"Total transferred file size: %s bytes\n",
233 human_num(stats.total_transferred_size));
234 rprintf(FINFO,"Literal data: %s bytes\n",
235 human_num(stats.literal_data));
236 rprintf(FINFO,"Matched data: %s bytes\n",
237 human_num(stats.matched_data));
238 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
239 if (stats.flist_buildtime) {
241 "File list generation time: %.3f seconds\n",
242 (double)stats.flist_buildtime / 1000);
244 "File list transfer time: %.3f seconds\n",
245 (double)stats.flist_xfertime / 1000);
247 rprintf(FINFO,"Total bytes sent: %s\n",
248 human_num(total_written));
249 rprintf(FINFO,"Total bytes received: %s\n",
250 human_num(total_read));
253 if (verbose || do_stats) {
255 "\nsent %s bytes received %s bytes %s bytes/sec\n",
256 human_num(total_written), human_num(total_read),
257 human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
258 rprintf(FINFO, "total size is %s speedup is %.2f\n",
259 human_num(stats.total_size),
260 (double)stats.total_size / (total_written+total_read));
269 * If our C library can get malloc statistics, then show them to FINFO
271 static void show_malloc_stats(void)
278 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
279 getpid(), am_server ? "server " : "",
280 am_daemon ? "daemon " : "", who_am_i());
281 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
283 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
285 rprintf(FINFO, " smblks: %10ld\n",
287 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
289 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
291 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
292 (long)mi.arena + mi.hblkhd);
293 rprintf(FINFO, " usmblks: %10ld\n",
295 rprintf(FINFO, " fsmblks: %10ld\n",
297 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
299 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
301 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
303 #endif /* HAVE_MALLINFO */
307 /* Start the remote shell. cmd may be NULL to use the default. */
308 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
309 int *f_in, int *f_out)
312 char *args[MAX_ARGS];
317 if (!read_batch && !local_server) {
318 char *t, *f, in_quote = '\0';
319 char *rsh_env = getenv(RSYNC_RSH_ENV);
328 for (t = f = cmd; *f; f++) {
331 /* Comparison leaves rooms for server_options(). */
332 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
333 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
334 exit_cleanup(RERR_SYNTAX);
337 while (*f != ' ' || in_quote) {
341 "Missing trailing-%c in remote-shell command.\n",
343 exit_cleanup(RERR_SYNTAX);
348 if (*f == '\'' || *f == '"') {
353 if (*f == in_quote && *++f != in_quote) {
363 /* check to see if we've already been given '-l user' in
364 * the remote-shell command */
365 for (i = 0; i < argc-1; i++) {
366 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
371 /* remsh (on HPUX) takes the arguments the other way around */
372 args[argc++] = machine;
373 if (user && !(daemon_over_rsh && dash_l_set)) {
378 if (user && !(daemon_over_rsh && dash_l_set)) {
382 args[argc++] = machine;
385 args[argc++] = rsync_path;
387 if (blocking_io < 0) {
389 if ((cp = strrchr(cmd, '/')) != NULL)
393 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
397 server_options(args,&argc);
399 if (argc >= MAX_ARGS - 2) {
400 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
401 exit_cleanup(RERR_SYNTAX);
407 if (!daemon_over_rsh && path && *path)
413 for (i = 0; i < argc; i++)
414 rprintf(FINFO, "cmd[%d]=%s ", i, args[i]);
415 rprintf(FINFO, "\n");
419 int from_gen_pipe[2];
420 if (fd_pair(from_gen_pipe) < 0) {
421 rsyserr(FERROR, errno, "pipe");
422 exit_cleanup(RERR_IPC);
424 batch_gen_fd = from_gen_pipe[0];
425 *f_out = from_gen_pipe[1];
427 ret = -1; /* no child pid */
428 } else if (local_server) {
429 /* If the user didn't request --[no-]whole-file, force
430 * it on, but only if we're not batch processing. */
431 if (whole_file < 0 && !write_batch)
433 ret = local_child(argc, args, f_in, f_out, child_main);
435 ret = piped_child(args,f_in,f_out);
443 out_of_memory("do_cmd");
444 return 0; /* not reached */
447 /* The receiving side operates in one of two modes:
449 * 1. it receives any number of files into a destination directory,
450 * placing them according to their names in the file-list.
452 * 2. it receives a single file and saves it using the name in the
453 * destination path instead of its file-list name. This requires a
454 * "local name" for writing out the destination file.
456 * So, our task is to figure out what mode/local-name we need and return
457 * either a NULL for mode 1, or the local-name for mode 2. We also
458 * change directory if there are any path components in dest_path. */
459 static char *get_local_name(struct file_list *flist, char *dest_path)
465 rprintf(FINFO, "get_local_name count=%d %s\n",
466 flist->count, NS(dest_path));
469 if (!dest_path || list_only)
472 /* If the destination path refers to an existing directory, enter
473 * it and use mode 1. If there is something other than a directory
474 * at the destination path, we must be transferring one file
475 * (anything at the destination will be overwritten). */
476 if (safe_stat(dest_path, &st) == 0) {
477 if (S_ISDIR(st.st_mode)) {
479 die_on_unsafe_path(dest_path, 0);
480 if (!push_dir(dest_path)) {
481 rsyserr(FERROR, errno, "push_dir#1 %s failed",
482 full_fname(dest_path));
483 exit_cleanup(RERR_FILESELECT);
487 if (sanitize_paths && S_ISLNK(st.st_mode))
488 die_on_unsafe_path(dest_path, 0);
489 if (flist->count > 1) {
491 "ERROR: destination must be a directory when"
492 " copying more than 1 file\n");
493 exit_cleanup(RERR_FILESELECT);
495 /* Caution: flist->count could be 0! */
496 if (flist->count == 1 && S_ISDIR(flist->files[0]->mode)) {
498 "ERROR: cannot overwrite non-directory"
499 " with a directory\n");
500 exit_cleanup(RERR_FILESELECT);
502 } else if (errno != ENOENT) {
503 rsyserr(FERROR, errno, "cannot stat destination %s",
504 full_fname(dest_path));
505 exit_cleanup(RERR_FILESELECT);
508 cp = strrchr(dest_path, '/');
510 /* If the destination path ends in a slash or we are transferring
511 * multiple files, create a directory at the destination path,
512 * enter the new directory, and use mode 1. */
513 if (flist->count > 1 || (cp && !cp[1])) {
514 /* Lop off the final slash (if any). */
518 if (mkdir_defmode(dest_path) != 0) {
519 rsyserr(FERROR, errno, "mkdir %s failed",
520 full_fname(dest_path));
521 exit_cleanup(RERR_FILEIO);
525 rprintf(FINFO, "created directory %s\n", dest_path);
528 /* Indicate that the destination directory doesn't
529 * really exist and return mode 1. */
535 die_on_unsafe_path(dest_path, 0);
536 if (!push_dir(dest_path)) {
537 rsyserr(FERROR, errno, "push_dir#2 %s failed",
538 full_fname(dest_path));
539 exit_cleanup(RERR_FILESELECT);
545 /* Otherwise, we are writing a single file, possibly on top of an
546 * existing non-directory. Change to the item's parent directory
547 * (if it has a path component), return the basename of the
548 * destination file as the local name, and use mode 2. */
557 die_on_unsafe_path(dest_path, 0);
558 if (!push_dir(dest_path)) {
559 rsyserr(FERROR, errno, "push_dir#3 %s failed",
560 full_fname(dest_path));
561 exit_cleanup(RERR_FILESELECT);
569 /* This is only called by the sender. */
570 static void read_final_goodbye(int f_in, int f_out)
574 if (protocol_version < 29)
577 while ((i = read_int(f_in)) == the_file_list->count
578 && read_shortint(f_in) == ITEM_IS_NEW) {
579 /* Forward the keep-alive (no-op) to the receiver. */
580 write_int(f_out, the_file_list->count);
581 write_shortint(f_out, ITEM_IS_NEW);
586 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
588 exit_cleanup(RERR_PROTOCOL);
593 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
595 struct file_list *flist;
599 rprintf(FINFO, "server_sender starting pid=%ld\n",
603 if (am_daemon && lp_write_only(module_id)) {
604 rprintf(FERROR, "ERROR: module is write only\n");
605 exit_cleanup(RERR_SYNTAX);
608 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
610 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
611 exit_cleanup(RERR_SYNTAX);
615 if (!relative_paths) {
617 die_on_unsafe_path(dir, 0);
618 if (!push_dir(dir)) {
619 rsyserr(FERROR, errno, "push_dir#3 %s failed",
621 exit_cleanup(RERR_FILESELECT);
627 if (argc == 0 && (recurse || list_only)) {
633 flist = send_file_list(f_out,argc,argv);
634 if (!flist || flist->count == 0) {
637 the_file_list = flist;
639 io_start_buffering_in();
640 io_start_buffering_out();
642 send_files(flist,f_out,f_in);
643 io_flush(FULL_FLUSH);
645 if (protocol_version >= 24)
646 read_final_goodbye(f_in, f_out);
647 io_flush(FULL_FLUSH);
652 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
658 /* The receiving side mustn't obey this, or an existing symlink that
659 * points to an identical file won't be replaced by the referent. */
660 copy_links = copy_dirlinks = 0;
662 if (preserve_hard_links)
665 if (fd_pair(error_pipe) < 0) {
666 rsyserr(FERROR, errno, "pipe failed in do_recv");
667 exit_cleanup(RERR_IPC);
670 io_flush(NORMAL_FLUSH);
672 if ((pid = do_fork()) == -1) {
673 rsyserr(FERROR, errno, "fork failed in do_recv");
674 exit_cleanup(RERR_IPC);
678 close(error_pipe[0]);
682 /* we can't let two processes write to the socket at one time */
683 close_multiplexing_out();
685 /* set place to send errors */
686 set_msg_fd_out(error_pipe[1]);
688 recv_files(f_in, flist, local_name);
689 io_flush(FULL_FLUSH);
692 send_msg(MSG_DONE, "", 0);
693 io_flush(FULL_FLUSH);
695 /* Handle any keep-alive packets from the post-processing work
696 * that the generator does. */
697 if (protocol_version >= 29) {
698 kluge_around_eof = -1;
700 /* This should only get stopped via a USR2 signal. */
701 while (read_int(f_in) == flist->count
702 && read_shortint(f_in) == ITEM_IS_NEW) {}
704 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
706 exit_cleanup(RERR_PROTOCOL);
709 /* Finally, we go to sleep until our parent kills us with a
710 * USR2 signal. We sleep for a short time, as on some OSes
711 * a signal won't interrupt a sleep! */
717 close_multiplexing_in();
718 if (write_batch && !am_server)
721 close(error_pipe[1]);
725 io_start_buffering_out();
727 set_msg_fd_in(error_pipe[0]);
729 generate_files(f_out, flist, local_name);
732 io_flush(FULL_FLUSH);
733 if (protocol_version >= 24) {
734 /* send a final goodbye message */
735 write_int(f_out, -1);
737 io_flush(FULL_FLUSH);
741 wait_process_with_flush(pid, &exit_code);
746 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
749 struct file_list *flist;
750 char *local_name = NULL;
752 int save_verbose = verbose;
754 if (filesfrom_fd >= 0) {
755 /* We can't mix messages with files-from data on the socket,
756 * so temporarily turn off verbose messages. */
761 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
762 argc, (long)getpid());
765 if (am_daemon && lp_read_only(module_id)) {
766 rprintf(FERROR,"ERROR: module is read only\n");
767 exit_cleanup(RERR_SYNTAX);
775 if (!am_daemon && !push_dir(dir)) {
776 rsyserr(FERROR, errno, "push_dir#4 %s failed",
778 exit_cleanup(RERR_FILESELECT);
782 io_start_buffering_in();
783 recv_filter_list(f_in);
785 if (filesfrom_fd >= 0) {
786 /* We need to send the files-from names to the sender at the
787 * same time that we receive the file-list from them, so we
788 * need the IO routines to automatically write out the names
789 * onto our f_out socket as we read the file-list. This
790 * avoids both deadlock and extra delays/buffers. */
791 io_set_filesfrom_fds(filesfrom_fd, f_out);
795 flist = recv_file_list(f_in);
796 verbose = save_verbose;
798 rprintf(FERROR,"server_recv: recv_file_list error\n");
799 exit_cleanup(RERR_FILESELECT);
801 the_file_list = flist;
804 local_name = get_local_name(flist,argv[0]);
806 /* Now that we know what our destination directory turned out to be,
807 * we can sanitize the --link-/copy-/compare-dest args correctly. */
808 if (sanitize_paths) {
810 for (dir = basis_dir; *dir; dir++) {
811 *dir = sanitize_path(NULL, *dir, NULL, curr_dir_depth, NULL);
812 die_on_unsafe_path(*dir, 0);
815 partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, NULL);
816 /* A relative path gets this checked at every dir change. */
817 if (*partial_dir == '/')
818 die_on_unsafe_path(partial_dir, 0);
821 if (server_filter_list.head) {
823 struct filter_list_struct *elp = &server_filter_list;
825 for (dir = basis_dir; *dir; dir++) {
826 if (check_filter(elp, *dir, 1) < 0)
827 goto options_rejected;
829 if (partial_dir && *partial_dir == '/'
830 && check_filter(elp, partial_dir, 1) < 0) {
833 "Your options have been rejected by the server.\n");
834 exit_cleanup(RERR_SYNTAX);
838 exit_code = do_recv(f_in,f_out,flist,local_name);
839 exit_cleanup(exit_code);
843 int child_main(int argc, char *argv[])
845 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
850 void start_server(int f_in, int f_out, int argc, char *argv[])
852 set_nonblocking(f_in);
853 set_nonblocking(f_out);
855 io_set_sock_fds(f_in, f_out);
856 setup_protocol(f_out, f_in);
857 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
861 if (protocol_version >= 23)
862 io_start_multiplex_out();
865 keep_dirlinks = 0; /* Must be disabled on the sender. */
866 if (need_messages_from_generator)
867 io_start_multiplex_in();
869 recv_filter_list(f_in);
870 do_server_sender(f_in, f_out, argc, argv);
872 do_server_recv(f_in, f_out, argc, argv);
879 * This is called once the connection has been negotiated. It is used
880 * for rsyncd, remote-shell, and local connections.
882 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
884 struct file_list *flist = NULL;
885 int exit_code = 0, exit_code2 = 0;
886 char *local_name = NULL;
888 cleanup_child_pid = pid;
890 set_nonblocking(f_in);
891 set_nonblocking(f_out);
894 io_set_sock_fds(f_in, f_out);
895 setup_protocol(f_out,f_in);
896 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
900 if (protocol_version >= 23 && !read_batch)
901 io_start_multiplex_in();
903 /* We set our stderr file handle to blocking because ssh might have
904 * set it to non-blocking. This can be particularly troublesome if
905 * stderr is a clone of stdout, because ssh would have set our stdout
906 * to non-blocking at the same time (which can easily cause us to lose
907 * output from our print statements). This kluge shouldn't cause ssh
908 * any problems for how we use it. Note also that we delayed setting
909 * this until after the above protocol setup so that we know for sure
910 * that ssh is done twiddling its file descriptors. */
911 set_blocking(STDERR_FILENO);
914 keep_dirlinks = 0; /* Must be disabled on the sender. */
915 io_start_buffering_out();
918 send_filter_list(f_out);
922 if (write_batch && !am_server)
923 start_write_batch(f_out);
924 flist = send_file_list(f_out, argc, argv);
927 rprintf(FINFO,"file list sent\n");
928 the_file_list = flist;
930 io_flush(NORMAL_FLUSH);
931 send_files(flist,f_out,f_in);
932 io_flush(FULL_FLUSH);
934 if (protocol_version >= 24)
935 read_final_goodbye(f_in, f_out);
938 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
939 io_flush(FULL_FLUSH);
940 wait_process_with_flush(pid, &exit_code);
943 io_flush(FULL_FLUSH);
944 exit_cleanup(exit_code);
947 if (need_messages_from_generator && !read_batch)
948 io_start_multiplex_out();
953 send_filter_list(read_batch ? -1 : f_out);
955 if (filesfrom_fd >= 0) {
956 io_set_filesfrom_fds(filesfrom_fd, f_out);
960 if (write_batch && !am_server)
961 start_write_batch(f_in);
962 flist = recv_file_list(f_in);
963 the_file_list = flist;
965 if (flist && flist->count > 0) {
966 local_name = get_local_name(flist, argv[0]);
968 exit_code2 = do_recv(f_in, f_out, flist, local_name);
976 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
977 io_flush(FULL_FLUSH);
978 wait_process_with_flush(pid, &exit_code);
981 return MAX(exit_code, exit_code2);
984 static int copy_argv (char *argv[])
988 for (i = 0; argv[i]; i++) {
989 if (!(argv[i] = strdup(argv[i]))) {
990 rprintf (FERROR, "out of memory at %s(%d)\n",
1001 * Start a client for either type of remote connection. Work out
1002 * whether the arguments request a remote shell or rsyncd connection,
1003 * and call the appropriate connection function, then run_client.
1005 * Calls either start_socket_client (for sockets) or do_cmd and
1006 * client_run (for ssh).
1008 static int start_client(int argc, char *argv[])
1011 char *shell_machine = NULL;
1012 char *shell_path = NULL;
1013 char *shell_user = NULL;
1019 /* Don't clobber argv[] so that ps(1) can still show the right
1021 if ((rc = copy_argv(argv)))
1024 if (!read_batch) { /* for read_batch, NO source is specified */
1025 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1026 if (shell_path) { /* source is remote */
1030 && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
1032 "The source and destination cannot both be remote.\n");
1033 exit_cleanup(RERR_SYNTAX);
1036 if (filesfrom_host && *filesfrom_host
1037 && strcmp(filesfrom_host, shell_machine) != 0) {
1039 "--files-from hostname is not the same as the transfer hostname\n");
1040 exit_cleanup(RERR_SYNTAX);
1044 return start_socket_client(shell_machine,
1048 daemon_over_rsh = 1;
1052 } else { /* source is local, check dest arg */
1062 shell_path = check_for_hostspec(p, &shell_machine, &rsync_port);
1063 if (shell_path && filesfrom_host && *filesfrom_host
1064 && strcmp(filesfrom_host, shell_machine) != 0) {
1066 "--files-from hostname is not the same as the transfer hostname\n");
1067 exit_cleanup(RERR_SYNTAX);
1069 if (!shell_path) { /* no hostspec found, so src & dest are local */
1071 if (filesfrom_host) {
1073 "--files-from cannot be remote when the transfer is local\n");
1074 exit_cleanup(RERR_SYNTAX);
1076 shell_machine = NULL;
1078 } else if (rsync_port) {
1080 return start_socket_client(shell_machine,
1084 daemon_over_rsh = 1;
1087 } else { /* read_batch */
1089 shell_path = argv[argc-1];
1090 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1091 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1092 exit_cleanup(RERR_SYNTAX);
1096 if (shell_machine) {
1097 p = strrchr(shell_machine,'@');
1100 shell_user = shell_machine;
1101 shell_machine = p+1;
1106 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1107 shell_cmd ? shell_cmd : "",
1108 shell_machine ? shell_machine : "",
1109 shell_user ? shell_user : "",
1110 shell_path ? shell_path : "");
1113 /* for remote source, only single dest arg can remain ... */
1114 if (!am_sender && argc > 1) {
1116 exit_cleanup(RERR_SYNTAX);
1119 /* ... or no dest at all */
1120 if (!am_sender && argc == 0)
1123 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1126 /* if we're running an rsync server on the remote host over a
1127 * remote shell command, we need to do the RSYNCD protocol first */
1128 if (daemon_over_rsh) {
1130 tmpret = start_inband_exchange(shell_user, shell_path,
1136 ret = client_run(f_in, f_out, pid, argc, argv);
1145 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1147 exit_cleanup(RERR_SIGNAL1);
1150 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1156 _exit(RERR_PARTIAL);
1160 RETSIGTYPE remember_children(UNUSED(int val))
1165 /* An empty waitpid() loop was put here by Tridge and we could never
1166 * get him to explain why he put it in, so rather than taking it
1167 * out we're instead saving the child exit statuses for later use.
1168 * The waitpid() loop presumably eliminates all possibility of leaving
1169 * zombie children, maybe that's why he did it. */
1170 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1171 /* save the child's exit status */
1172 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1173 if (pid_stat_table[cnt].pid == 0) {
1174 pid_stat_table[cnt].pid = pid;
1175 pid_stat_table[cnt].status = status;
1181 #ifndef HAVE_SIGACTION
1182 signal(SIGCHLD, remember_children);
1188 * This routine catches signals and tries to send them to gdb.
1190 * Because it's called from inside a signal handler it ought not to
1191 * use too many library routines.
1193 * @todo Perhaps use "screen -X" instead/as well, to help people
1194 * debugging without easy access to X. Perhaps use an environment
1195 * variable, or just call a script?
1197 * @todo The /proc/ magic probably only works on Linux (and
1198 * Solaris?) Can we be more portable?
1200 #ifdef MAINTAINER_MODE
1201 const char *get_panic_action(void)
1203 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1208 return "xterm -display :0 -T Panic -n Panic "
1209 "-e gdb /proc/%d/exe %d";
1214 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1216 * This signal handler is only installed if we were configured with
1217 * --enable-maintainer-mode. Perhaps it should always be on and we
1218 * should just look at the environment variable, but I'm a bit leery
1219 * of a signal sending us into a busy loop.
1221 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1226 sprintf(cmd_buf, get_panic_action(),
1227 getpid(), getpid());
1229 /* Unless we failed to execute gdb, we allow the process to
1230 * continue. I'm not sure if that's right. */
1231 ret = system(cmd_buf);
1238 int main(int argc,char *argv[])
1241 int orig_argc = argc;
1242 char **orig_argv = argv;
1243 #ifdef HAVE_SIGACTION
1244 # ifdef HAVE_SIGPROCMASK
1247 sigemptyset(&sigmask);
1249 sigact.sa_flags = SA_NOCLDSTOP;
1251 SIGACTMASK(SIGUSR1, sigusr1_handler);
1252 SIGACTMASK(SIGUSR2, sigusr2_handler);
1253 SIGACTMASK(SIGCHLD, remember_children);
1254 #ifdef MAINTAINER_MODE
1255 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1256 SIGACTMASK(SIGFPE, rsync_panic_handler);
1257 SIGACTMASK(SIGABRT, rsync_panic_handler);
1258 SIGACTMASK(SIGBUS, rsync_panic_handler);
1261 starttime = time(NULL);
1262 am_root = (MY_UID() == 0);
1264 memset(&stats, 0, sizeof(stats));
1268 exit_cleanup(RERR_SYNTAX);
1271 /* we set a 0 umask so that correct file permissions can be
1273 orig_umask = umask(0);
1275 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1276 setlocale(LC_CTYPE, "");
1279 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1280 /* FIXME: We ought to call the same error-handling
1281 * code here, rather than relying on getopt. */
1283 exit_cleanup(RERR_SYNTAX);
1286 SIGACTMASK(SIGINT, sig_int);
1287 SIGACTMASK(SIGHUP, sig_int);
1288 SIGACTMASK(SIGTERM, sig_int);
1289 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1290 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1293 /* Ignore SIGPIPE; we consistently check error codes and will
1295 SIGACTION(SIGPIPE, SIG_IGN);
1297 SIGACTION(SIGXFSZ, SIG_IGN);
1300 /* Initialize push_dir here because on some old systems getcwd
1301 * (implemented by forking "pwd" and reading its output) doesn't
1302 * work when there are other child processes. Also, on all systems
1303 * that implement getcwd that way "pwd" can't be found after chroot. */
1308 if ((write_batch || read_batch) && !am_server) {
1310 write_batch_shell_file(orig_argc, orig_argv, argc);
1312 if (read_batch && strcmp(batch_name, "-") == 0)
1313 batch_fd = STDIN_FILENO;
1315 batch_fd = do_open(batch_name,
1316 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1317 : O_RDONLY, S_IRUSR | S_IWUSR);
1320 rsyserr(FERROR, errno, "Batch file %s open error",
1321 full_fname(batch_name));
1322 exit_cleanup(RERR_FILEIO);
1325 read_stream_flags(batch_fd);
1327 if (write_batch < 0)
1330 if (am_daemon && !am_server)
1331 return daemon_main();
1335 exit_cleanup(RERR_SYNTAX);
1339 set_nonblocking(STDIN_FILENO);
1340 set_nonblocking(STDOUT_FILENO);
1342 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1343 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1346 ret = start_client(argc, argv);
1348 exit_cleanup(RERR_STARTCLIENT);