1 /* -*- c-file-style: "linux" -*-
3 Copyright (C) 1996-2001 by Andrew Tridgell <tridge@samba.org>
4 Copyright (C) Paul Mackerras 1996
5 Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 extern struct stats stats;
30 extern int am_generator;
33 extern int blocking_io;
34 extern int delete_before;
35 extern int daemon_over_rsh;
39 extern int log_got_error;
41 extern int orig_umask;
42 extern int copy_links;
43 extern int keep_dirlinks;
44 extern int preserve_hard_links;
45 extern int protocol_version;
47 extern int relative_paths;
48 extern int rsync_port;
49 extern int whole_file;
50 extern int read_batch;
51 extern int write_batch;
53 extern int batch_gen_fd;
54 extern int filesfrom_fd;
55 extern pid_t cleanup_child_pid;
56 extern char *files_from;
57 extern char *remote_filesfrom_file;
58 extern char *partial_dir;
59 extern char *basis_dir[];
60 extern char *rsync_path;
61 extern char *shell_cmd;
62 extern char *batch_name;
66 /* There's probably never more than at most 2 outstanding child processes,
67 * but set it higher, just in case. */
68 #define MAXCHILDPROCS 5
73 } pid_stat_table[MAXCHILDPROCS];
75 static void show_malloc_stats(void);
77 /****************************************************************************
78 wait for a process to exit, calling io_flush while waiting
79 ****************************************************************************/
80 void wait_process(pid_t pid, int *status)
85 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
90 if (waited_pid == -1 && errno == ECHILD) {
91 /* status of requested child no longer available.
92 * check to see if it was processed by the sigchld_handler.
94 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
95 if (pid == pid_stat_table[cnt].pid) {
96 *status = pid_stat_table[cnt].status;
97 pid_stat_table[cnt].pid = 0;
103 /* TODO: If the child exited on a signal, then log an
104 * appropriate error message. Perhaps we should also accept a
105 * message describing the purpose of the child. Also indicate
106 * this to the caller so that thhey know something went
108 *status = WEXITSTATUS(*status);
111 /* This function gets called from all 3 processes. We want the client side
112 * to actually output the text, but the sender is the only process that has
113 * all the stats we need. So, if we're a client sender, we do the report.
114 * If we're a server sender, we write the stats on the supplied fd. If
115 * we're the client receiver we read the stats from the supplied fd and do
116 * the report. All processes might also generate a set of debug stats, if
117 * the verbose level is high enough (this is the only thing that the
118 * generator process and the server receiver ever do here). */
119 static void report(int f)
121 /* Cache two stats because the read/write code can change it. */
122 int64 total_read = stats.total_read;
123 int64 total_written = stats.total_written;
124 time_t t = time(NULL);
126 if (do_stats && verbose > 1) {
127 /* These come out from every process */
136 log_exit(0, __FILE__, __LINE__);
137 if (f == -1 || !am_sender)
143 write_longint(f, total_read);
144 write_longint(f, total_written);
145 write_longint(f, stats.total_size);
146 if (protocol_version >= 29) {
147 write_longint(f, stats.flist_buildtime);
148 write_longint(f, stats.flist_xfertime);
154 /* this is the client */
157 /* Read the first two in opposite order because the meaning of
158 * read/write swaps when switching from sender to receiver. */
159 total_written = read_longint(f);
160 total_read = read_longint(f);
161 stats.total_size = read_longint(f);
162 if (protocol_version >= 29) {
163 stats.flist_buildtime = read_longint(f);
164 stats.flist_xfertime = read_longint(f);
166 } else if (write_batch) {
167 /* The --read-batch process is going to be a client
168 * receiver, so we need to give it the stats. */
169 write_longint(batch_fd, total_read);
170 write_longint(batch_fd, total_written);
171 write_longint(batch_fd, stats.total_size);
172 if (protocol_version >= 29) {
173 write_longint(batch_fd, stats.flist_buildtime);
174 write_longint(batch_fd, stats.flist_xfertime);
179 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
180 rprintf(FINFO,"Number of files transferred: %d\n",
181 stats.num_transferred_files);
182 rprintf(FINFO,"Total file size: %.0f bytes\n",
183 (double)stats.total_size);
184 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
185 (double)stats.total_transferred_size);
186 rprintf(FINFO,"Literal data: %.0f bytes\n",
187 (double)stats.literal_data);
188 rprintf(FINFO,"Matched data: %.0f bytes\n",
189 (double)stats.matched_data);
190 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
191 if (stats.flist_buildtime) {
193 "File list generation time: %.3f seconds\n",
194 (double)stats.flist_buildtime / 1000);
196 "File list transfer time: %.3f seconds\n",
197 (double)stats.flist_xfertime / 1000);
199 rprintf(FINFO,"Total bytes sent: %.0f\n",
200 (double)total_written);
201 rprintf(FINFO,"Total bytes received: %.0f\n",
205 if (verbose || do_stats) {
207 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
208 (double)total_written, (double)total_read,
209 (total_written + total_read)/(0.5 + (t - starttime)));
210 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
211 (double)stats.total_size,
212 (double)stats.total_size / (total_written+total_read));
221 * If our C library can get malloc statistics, then show them to FINFO
223 static void show_malloc_stats(void)
230 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
231 getpid(), am_server ? "server " : "",
232 am_daemon ? "daemon " : "", who_am_i());
233 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
235 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
237 rprintf(FINFO, " smblks: %10ld\n",
239 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
241 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
243 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
244 (long)mi.arena + mi.hblkhd);
245 rprintf(FINFO, " usmblks: %10ld\n",
247 rprintf(FINFO, " fsmblks: %10ld\n",
249 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
251 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
253 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
255 #endif /* HAVE_MALLINFO */
259 /* Start the remote shell. cmd may be NULL to use the default. */
260 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
261 int *f_in, int *f_out)
264 char *args[MAX_ARGS];
266 char *tok, *dir = NULL;
269 if (!read_batch && !local_server) {
270 char *rsh_env = getenv(RSYNC_RSH_ENV);
279 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
280 /* Comparison leaves rooms for server_options(). */
281 if (argc >= MAX_ARGS - 100) {
282 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
283 exit_cleanup(RERR_SYNTAX);
288 /* check to see if we've already been given '-l user' in
289 * the remote-shell command */
290 for (i = 0; i < argc-1; i++) {
291 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
296 /* remsh (on HPUX) takes the arguments the other way around */
297 args[argc++] = machine;
298 if (user && !(daemon_over_rsh && dash_l_set)) {
303 if (user && !(daemon_over_rsh && dash_l_set)) {
307 args[argc++] = machine;
310 args[argc++] = rsync_path;
312 if (blocking_io < 0) {
314 if ((cp = strrchr(cmd, '/')) != NULL)
318 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
322 server_options(args,&argc);
324 if (argc >= MAX_ARGS - 2) {
325 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
326 exit_cleanup(RERR_SYNTAX);
332 if (!daemon_over_rsh && path && *path)
338 rprintf(FINFO,"cmd=");
339 for (i = 0; i < argc; i++)
340 rprintf(FINFO, "%s ", safe_fname(args[i]));
345 int from_gen_pipe[2];
346 if (fd_pair(from_gen_pipe) < 0) {
347 rsyserr(FERROR, errno, "pipe");
348 exit_cleanup(RERR_IPC);
350 batch_gen_fd = from_gen_pipe[0];
351 *f_out = from_gen_pipe[1];
353 ret = -1; /* no child pid */
354 } else if (local_server) {
355 /* If the user didn't request --[no-]whole-file, force
356 * it on, but only if we're not batch processing. */
357 if (whole_file < 0 && !write_batch)
359 ret = local_child(argc, args, f_in, f_out, child_main);
361 ret = piped_child(args,f_in,f_out);
369 out_of_memory("do_cmd");
370 return 0; /* not reached */
374 static char *get_local_name(struct file_list *flist,char *name)
380 rprintf(FINFO,"get_local_name count=%d %s\n",
381 flist->count, NS(name));
386 if (do_stat(name,&st) == 0) {
387 if (S_ISDIR(st.st_mode)) {
388 if (!push_dir(name)) {
389 rsyserr(FERROR, errno, "push_dir#1 %s failed",
391 exit_cleanup(RERR_FILESELECT);
395 if (flist->count > 1) {
396 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
397 exit_cleanup(RERR_FILESELECT);
402 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
405 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
406 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
407 exit_cleanup(RERR_FILEIO);
410 rprintf(FINFO, "created directory %s\n", safe_fname(name));
417 if (!push_dir(name)) {
418 rsyserr(FERROR, errno, "push_dir#2 %s failed",
420 exit_cleanup(RERR_FILESELECT);
427 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
430 struct file_list *flist;
434 rprintf(FINFO, "server_sender starting pid=%ld\n",
438 if (am_daemon && lp_write_only(module_id)) {
439 rprintf(FERROR, "ERROR: module is write only\n");
440 exit_cleanup(RERR_SYNTAX);
444 if (!relative_paths && !push_dir(dir)) {
445 rsyserr(FERROR, errno, "push_dir#3 %s failed",
447 exit_cleanup(RERR_FILESELECT);
452 if (strcmp(dir,".")) {
454 if (strcmp(dir,"/") == 0)
456 for (i = 0; i < argc; i++)
460 if (argc == 0 && (recurse || list_only)) {
466 flist = send_file_list(f_out,argc,argv);
467 if (!flist || flist->count == 0) {
471 io_start_buffering_in();
472 io_start_buffering_out();
474 send_files(flist,f_out,f_in);
475 io_flush(FULL_FLUSH);
477 if (protocol_version >= 24) {
478 /* final goodbye message */
481 io_flush(FULL_FLUSH);
486 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
490 int error_pipe[2], name_pipe[2];
491 BOOL need_name_pipe = (basis_dir[0] || partial_dir) && !dry_run;
493 /* The receiving side mustn't obey this, or an existing symlink that
494 * points to an identical file won't be replaced by the referent. */
497 if (preserve_hard_links)
498 init_hard_links(flist);
500 if (delete_before && !local_name && flist->count > 0) {
501 /* Moved here from recv_files() to prevent a race condition */
505 if (fd_pair(error_pipe) < 0
506 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
507 rsyserr(FERROR, errno, "pipe failed in do_recv");
508 exit_cleanup(RERR_IPC);
511 io_flush(NORMAL_FLUSH);
513 if ((pid = do_fork()) == -1) {
514 rsyserr(FERROR, errno, "fork failed in do_recv");
515 exit_cleanup(RERR_IPC);
519 close(error_pipe[0]);
520 if (need_name_pipe) {
522 set_blocking(name_pipe[0]);
528 /* we can't let two processes write to the socket at one time */
529 close_multiplexing_out();
531 /* set place to send errors */
532 set_msg_fd_out(error_pipe[1]);
534 recv_files(f_in, flist, local_name, name_pipe[0]);
535 io_flush(FULL_FLUSH);
538 send_msg(MSG_DONE, "", 0);
539 io_flush(FULL_FLUSH);
540 /* finally we go to sleep until our parent kills us
541 * with a USR2 signal. We sleep for a short time as on
542 * some OSes a signal won't interrupt a sleep! */
548 close_multiplexing_in();
552 close(error_pipe[1]);
553 if (need_name_pipe) {
555 set_nonblocking(name_pipe[1]);
561 io_start_buffering_out();
563 set_msg_fd_in(error_pipe[0]);
565 generate_files(f_out, flist, local_name, name_pipe[1]);
568 io_flush(FULL_FLUSH);
569 if (protocol_version >= 24) {
570 /* send a final goodbye message */
571 write_int(f_out, -1);
573 io_flush(FULL_FLUSH);
577 wait_process(pid, &status);
582 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
585 struct file_list *flist;
586 char *local_name = NULL;
588 int save_verbose = verbose;
590 if (filesfrom_fd >= 0) {
591 /* We can't mix messages with files-from data on the socket,
592 * so temporarily turn off verbose messages. */
597 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
598 argc, (long)getpid());
601 if (am_daemon && lp_read_only(module_id)) {
602 rprintf(FERROR,"ERROR: module is read only\n");
603 exit_cleanup(RERR_SYNTAX);
612 if (!am_daemon && !push_dir(dir)) {
613 rsyserr(FERROR, errno, "push_dir#4 %s failed",
615 exit_cleanup(RERR_FILESELECT);
619 io_start_buffering_in();
620 recv_filter_list(f_in);
622 if (filesfrom_fd >= 0) {
623 /* We need to send the files-from names to the sender at the
624 * same time that we receive the file-list from them, so we
625 * need the IO routines to automatically write out the names
626 * onto our f_out socket as we read the file-list. This
627 * avoids both deadlock and extra delays/buffers. */
628 io_set_filesfrom_fds(filesfrom_fd, f_out);
632 flist = recv_file_list(f_in);
633 verbose = save_verbose;
635 rprintf(FERROR,"server_recv: recv_file_list error\n");
636 exit_cleanup(RERR_FILESELECT);
640 if (strcmp(dir,".")) {
641 argv[0] += strlen(dir);
642 if (argv[0][0] == '/')
645 local_name = get_local_name(flist,argv[0]);
648 status = do_recv(f_in,f_out,flist,local_name);
649 exit_cleanup(status);
653 int child_main(int argc, char *argv[])
655 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
660 void start_server(int f_in, int f_out, int argc, char *argv[])
662 set_nonblocking(f_in);
663 set_nonblocking(f_out);
665 io_set_sock_fds(f_in, f_out);
666 setup_protocol(f_out, f_in);
668 if (protocol_version >= 23)
669 io_start_multiplex_out();
672 keep_dirlinks = 0; /* Must be disabled on the sender. */
674 recv_filter_list(f_in);
675 do_server_sender(f_in, f_out, argc, argv);
677 do_server_recv(f_in, f_out, argc, argv);
684 * This is called once the connection has been negotiated. It is used
685 * for rsyncd, remote-shell, and local connections.
687 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
689 struct file_list *flist = NULL;
690 int status = 0, status2 = 0;
691 char *local_name = NULL;
693 cleanup_child_pid = pid;
695 set_nonblocking(f_in);
696 set_nonblocking(f_out);
699 io_set_sock_fds(f_in, f_out);
700 setup_protocol(f_out,f_in);
702 if (protocol_version >= 23 && !read_batch)
703 io_start_multiplex_in();
705 /* We set our stderr file handle to blocking because ssh might have
706 * set it to non-blocking. This can be particularly troublesome if
707 * stderr is a clone of stdout, because ssh would have set our stdout
708 * to non-blocking at the same time (which can easily cause us to lose
709 * output from our print statements). This kluge shouldn't cause ssh
710 * any problems for how we use it. Note also that we delayed setting
711 * this until after the above protocol setup so that we know for sure
712 * that ssh is done twiddling its file descriptors. */
713 set_blocking(STDERR_FILENO);
716 keep_dirlinks = 0; /* Must be disabled on the sender. */
717 io_start_buffering_out();
718 if (!remote_filesfrom_file)
720 send_filter_list(f_out);
721 if (remote_filesfrom_file)
725 start_write_batch(f_out);
726 if (!read_batch) /* don't write to pipe */
727 flist = send_file_list(f_out,argc,argv);
730 rprintf(FINFO,"file list sent\n");
732 io_flush(NORMAL_FLUSH);
733 send_files(flist,f_out,f_in);
734 io_flush(FULL_FLUSH);
735 if (protocol_version >= 24) {
736 /* final goodbye message */
741 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
742 io_flush(FULL_FLUSH);
743 wait_process(pid, &status);
746 io_flush(FULL_FLUSH);
747 exit_cleanup(status);
753 send_filter_list(read_batch ? -1 : f_out);
755 if (filesfrom_fd >= 0) {
756 io_set_filesfrom_fds(filesfrom_fd, f_out);
761 start_write_batch(f_in);
762 flist = recv_file_list(f_in);
763 if (!flist || flist->count == 0) {
764 rprintf(FINFO, "client: nothing to do: "
765 "perhaps you need to specify some filenames or "
766 "the --recursive option?\n");
770 local_name = get_local_name(flist,argv[0]);
772 status2 = do_recv(f_in,f_out,flist,local_name);
776 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
777 io_flush(FULL_FLUSH);
778 wait_process(pid, &status);
781 return MAX(status, status2);
784 static int copy_argv (char *argv[])
788 for (i = 0; argv[i]; i++) {
789 if (!(argv[i] = strdup(argv[i]))) {
790 rprintf (FERROR, "out of memory at %s(%d)\n",
801 * Start a client for either type of remote connection. Work out
802 * whether the arguments request a remote shell or rsyncd connection,
803 * and call the appropriate connection function, then run_client.
805 * Calls either start_socket_client (for sockets) or do_cmd and
806 * client_run (for ssh).
808 static int start_client(int argc, char *argv[])
811 char *shell_machine = NULL;
812 char *shell_path = NULL;
813 char *shell_user = NULL;
819 /* Don't clobber argv[] so that ps(1) can still show the right
821 if ((rc = copy_argv(argv)))
824 /* rsync:// always uses rsync server over direct socket connection */
825 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
829 host = argv[0] + strlen(URL_PREFIX);
830 p = strchr(host,'/');
836 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
842 p = strchr(host, ':');
844 rsync_port = atoi(p+1);
847 return start_socket_client(host, path, argc-1, argv+1);
850 if (!read_batch) { /* for read_batch, NO source is specified */
851 p = find_colon(argv[0]);
852 if (p) { /* source is remote */
853 if (remote_filesfrom_file
854 && remote_filesfrom_file != files_from + 1
855 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
857 "--files-from hostname is not the same as the transfer hostname\n");
858 exit_cleanup(RERR_SYNTAX);
860 if (p[1] == ':') { /* double colon */
863 return start_socket_client(argv[0], p+2,
870 if (argc < 1) { /* destination required */
872 exit_cleanup(RERR_SYNTAX);
877 shell_machine = argv[0];
880 } else { /* source is local */
883 /* rsync:// destination uses rsync server over direct socket */
884 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
887 host = argv[argc-1] + strlen(URL_PREFIX);
888 p = strchr(host,'/');
894 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
900 p = strchr(host, ':');
902 rsync_port = atoi(p+1);
905 return start_socket_client(host, path, argc-1, argv);
908 p = find_colon(argv[argc-1]); /* look in dest arg */
909 if (p && remote_filesfrom_file
910 && remote_filesfrom_file != files_from + 1
911 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
913 "--files-from hostname is not the same as the transfer hostname\n");
914 exit_cleanup(RERR_SYNTAX);
916 if (!p) { /* no colon found, so src & dest are local */
918 if (remote_filesfrom_file) {
920 "--files-from cannot be remote when the transfer is local\n");
921 exit_cleanup(RERR_SYNTAX);
923 } else if (p[1] == ':') { /* double colon */
926 return start_socket_client(argv[argc-1], p+2,
935 exit_cleanup(RERR_SYNTAX);
939 shell_machine = NULL;
940 shell_path = argv[argc-1];
943 shell_machine = argv[argc-1];
948 } else { /* read_batch */
950 shell_path = argv[argc-1];
951 if (find_colon(shell_path)) {
952 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
953 exit_cleanup(RERR_SYNTAX);
958 p = strrchr(shell_machine,'@');
961 shell_user = shell_machine;
967 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
968 shell_cmd ? safe_fname(shell_cmd) : "",
969 shell_machine ? safe_fname(shell_machine) : "",
970 shell_user ? safe_fname(shell_user) : "",
971 shell_path ? safe_fname(shell_path) : "");
974 /* for remote source, only single dest arg can remain ... */
975 if (!am_sender && argc > 1) {
977 exit_cleanup(RERR_SYNTAX);
980 /* ... or no dest at all */
981 if (!am_sender && argc == 0)
984 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
987 /* if we're running an rsync server on the remote host over a
988 * remote shell command, we need to do the RSYNCD protocol first */
989 if (daemon_over_rsh) {
991 tmpret = start_inband_exchange(shell_user, shell_path,
997 ret = client_run(f_in, f_out, pid, argc, argv);
1006 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1008 exit_cleanup(RERR_SIGNAL);
1011 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1013 if (log_got_error) _exit(RERR_PARTIAL);
1017 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1022 /* An empty waitpid() loop was put here by Tridge and we could never
1023 * get him to explain why he put it in, so rather than taking it
1024 * out we're instead saving the child exit statuses for later use.
1025 * The waitpid() loop presumably eliminates all possibility of leaving
1026 * zombie children, maybe that's why he did it.
1028 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1029 /* save the child's exit status */
1030 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1031 if (pid_stat_table[cnt].pid == 0) {
1032 pid_stat_table[cnt].pid = pid;
1033 pid_stat_table[cnt].status = status;
1043 * This routine catches signals and tries to send them to gdb.
1045 * Because it's called from inside a signal handler it ought not to
1046 * use too many library routines.
1048 * @todo Perhaps use "screen -X" instead/as well, to help people
1049 * debugging without easy access to X. Perhaps use an environment
1050 * variable, or just call a script?
1052 * @todo The /proc/ magic probably only works on Linux (and
1053 * Solaris?) Can we be more portable?
1055 #ifdef MAINTAINER_MODE
1056 const char *get_panic_action(void)
1058 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1063 return "xterm -display :0 -T Panic -n Panic "
1064 "-e gdb /proc/%d/exe %d";
1069 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1071 * This signal handler is only installed if we were configured with
1072 * --enable-maintainer-mode. Perhaps it should always be on and we
1073 * should just look at the environment variable, but I'm a bit leery
1074 * of a signal sending us into a busy loop.
1076 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1081 sprintf(cmd_buf, get_panic_action(),
1082 getpid(), getpid());
1084 /* Unless we failed to execute gdb, we allow the process to
1085 * continue. I'm not sure if that's right. */
1086 ret = system(cmd_buf);
1093 int main(int argc,char *argv[])
1096 int orig_argc = argc;
1097 char **orig_argv = argv;
1099 signal(SIGUSR1, sigusr1_handler);
1100 signal(SIGUSR2, sigusr2_handler);
1101 signal(SIGCHLD, sigchld_handler);
1102 #ifdef MAINTAINER_MODE
1103 signal(SIGSEGV, rsync_panic_handler);
1104 signal(SIGFPE, rsync_panic_handler);
1105 signal(SIGABRT, rsync_panic_handler);
1106 signal(SIGBUS, rsync_panic_handler);
1107 #endif /* def MAINTAINER_MODE */
1109 starttime = time(NULL);
1110 am_root = (MY_UID() == 0);
1112 memset(&stats, 0, sizeof(stats));
1116 exit_cleanup(RERR_SYNTAX);
1119 /* we set a 0 umask so that correct file permissions can be
1121 orig_umask = (int)umask(0);
1123 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1124 /* FIXME: We ought to call the same error-handling
1125 * code here, rather than relying on getopt. */
1127 exit_cleanup(RERR_SYNTAX);
1130 signal(SIGINT,SIGNAL_CAST sig_int);
1131 signal(SIGHUP,SIGNAL_CAST sig_int);
1132 signal(SIGTERM,SIGNAL_CAST sig_int);
1134 /* Ignore SIGPIPE; we consistently check error codes and will
1136 signal(SIGPIPE, SIG_IGN);
1138 /* Initialize push_dir here because on some old systems getcwd
1139 * (implemented by forking "pwd" and reading its output) doesn't
1140 * work when there are other child processes. Also, on all systems
1141 * that implement getcwd that way "pwd" can't be found after chroot. */
1146 if (write_batch || read_batch) {
1148 write_batch_shell_file(orig_argc, orig_argv, argc);
1150 if (read_batch && strcmp(batch_name, "-") == 0)
1151 batch_fd = STDIN_FILENO;
1153 batch_fd = do_open(batch_name,
1154 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1155 : O_RDONLY, S_IRUSR | S_IWUSR);
1158 rsyserr(FERROR, errno, "Batch file %s open error",
1159 full_fname(batch_name));
1160 exit_cleanup(RERR_FILEIO);
1163 read_stream_flags(batch_fd);
1166 if (am_daemon && !am_server)
1167 return daemon_main();
1171 exit_cleanup(RERR_SYNTAX);
1175 verbose = MAX(verbose,1);
1178 set_nonblocking(STDIN_FILENO);
1179 set_nonblocking(STDOUT_FILENO);
1181 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1182 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1185 ret = start_client(argc, argv);
1187 exit_cleanup(RERR_STARTCLIENT);