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 cvs_exclude;
35 extern int delete_mode;
36 extern int delete_before;
37 extern int delete_after;
38 extern int delete_excluded;
39 extern int daemon_over_rsh;
43 extern int local_server;
44 extern int log_got_error;
46 extern int orig_umask;
47 extern int copy_links;
48 extern int keep_dirlinks;
49 extern int preserve_hard_links;
50 extern int protocol_version;
52 extern int relative_paths;
53 extern int rsync_port;
54 extern int whole_file;
55 extern int read_batch;
56 extern int write_batch;
58 extern int batch_gen_fd;
59 extern int filesfrom_fd;
60 extern pid_t cleanup_child_pid;
61 extern char *files_from;
62 extern char *remote_filesfrom_file;
63 extern char *partial_dir;
64 extern char *basis_dir[];
65 extern char *rsync_path;
66 extern char *shell_cmd;
67 extern char *batch_name;
70 /* there's probably never more than at most 2 outstanding child processes,
71 * but set it higher just in case.
73 #define MAXCHILDPROCS 5
78 } pid_stat_table[MAXCHILDPROCS];
80 static void show_malloc_stats(void);
82 /****************************************************************************
83 wait for a process to exit, calling io_flush while waiting
84 ****************************************************************************/
85 void wait_process(pid_t pid, int *status)
90 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
95 if (waited_pid == -1 && errno == ECHILD) {
96 /* status of requested child no longer available.
97 * check to see if it was processed by the sigchld_handler.
99 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
100 if (pid == pid_stat_table[cnt].pid) {
101 *status = pid_stat_table[cnt].status;
102 pid_stat_table[cnt].pid = 0;
108 /* TODO: If the child exited on a signal, then log an
109 * appropriate error message. Perhaps we should also accept a
110 * message describing the purpose of the child. Also indicate
111 * this to the caller so that thhey know something went
113 *status = WEXITSTATUS(*status);
116 /* This function gets called from all 3 processes. We want the client side
117 * to actually output the text, but the sender is the only process that has
118 * all the stats we need. So, if we're a client sender, we do the report.
119 * If we're a server sender, we write the stats on the supplied fd. If
120 * we're the client receiver we read the stats from the supplied fd and do
121 * the report. All processes might also generate a set of debug stats, if
122 * the verbose level is high enough (this is the only thing that the
123 * generator process and the server receiver ever do here). */
124 static void report(int f)
126 /* Cache two stats because the read/write code can change it. */
127 int64 total_read = stats.total_read;
128 int64 total_written = stats.total_written;
129 time_t t = time(NULL);
131 if (do_stats && verbose > 1) {
132 /* These come out from every process */
141 log_exit(0, __FILE__, __LINE__);
142 if (f == -1 || !am_sender)
148 write_longint(f, total_read);
149 write_longint(f, total_written);
150 write_longint(f, stats.total_size);
151 if (protocol_version >= 29) {
152 write_longint(f, stats.flist_buildtime);
153 write_longint(f, stats.flist_xfertime);
159 /* this is the client */
162 /* Read the first two in opposite order because the meaning of
163 * read/write swaps when switching from sender to receiver. */
164 total_written = read_longint(f);
165 total_read = read_longint(f);
166 stats.total_size = read_longint(f);
167 if (protocol_version >= 29) {
168 stats.flist_buildtime = read_longint(f);
169 stats.flist_xfertime = read_longint(f);
171 } else if (write_batch) {
172 /* The --read-batch process is going to be a client
173 * receiver, so we need to give it the stats. */
174 write_longint(batch_fd, total_read);
175 write_longint(batch_fd, total_written);
176 write_longint(batch_fd, stats.total_size);
177 if (protocol_version >= 29) {
178 write_longint(batch_fd, stats.flist_buildtime);
179 write_longint(batch_fd, stats.flist_xfertime);
184 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
185 rprintf(FINFO,"Number of files transferred: %d\n",
186 stats.num_transferred_files);
187 rprintf(FINFO,"Total file size: %.0f bytes\n",
188 (double)stats.total_size);
189 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
190 (double)stats.total_transferred_size);
191 rprintf(FINFO,"Literal data: %.0f bytes\n",
192 (double)stats.literal_data);
193 rprintf(FINFO,"Matched data: %.0f bytes\n",
194 (double)stats.matched_data);
195 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
196 if (stats.flist_buildtime) {
198 "File list generation time: %.3f seconds\n",
199 (double)stats.flist_buildtime / 1000);
201 "File list transfer time: %.3f seconds\n",
202 (double)stats.flist_xfertime / 1000);
204 rprintf(FINFO,"Total bytes sent: %.0f\n",
205 (double)total_written);
206 rprintf(FINFO,"Total bytes received: %.0f\n",
210 if (verbose || do_stats) {
212 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
213 (double)total_written, (double)total_read,
214 (total_written + total_read)/(0.5 + (t - starttime)));
215 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
216 (double)stats.total_size,
217 (double)stats.total_size / (total_written+total_read));
226 * If our C library can get malloc statistics, then show them to FINFO
228 static void show_malloc_stats(void)
235 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
237 am_server ? "server " : "",
238 am_daemon ? "daemon " : "",
240 rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena);
241 rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks);
242 rprintf(FINFO, " smblks: %10d\n", mi.smblks);
243 rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks);
244 rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd);
245 rprintf(FINFO, " allmem: %10d (bytes from sbrk + mmap)\n",
246 mi.arena + mi.hblkhd);
247 rprintf(FINFO, " usmblks: %10d\n", mi.usmblks);
248 rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks);
249 rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks);
250 rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks);
251 rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost);
252 #endif /* HAVE_MALLINFO */
256 /* Start the remote shell. cmd may be NULL to use the default. */
257 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
258 int *f_in, int *f_out)
261 char *args[MAX_ARGS];
263 char *tok, *dir = NULL;
266 if (!read_batch && !local_server) {
267 char *rsh_env = getenv(RSYNC_RSH_ENV);
276 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
277 /* Comparison leaves rooms for server_options(). */
278 if (argc >= MAX_ARGS - 100) {
279 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
280 exit_cleanup(RERR_SYNTAX);
285 /* check to see if we've already been given '-l user' in
286 * the remote-shell command */
287 for (i = 0; i < argc-1; i++) {
288 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
293 /* remsh (on HPUX) takes the arguments the other way around */
294 args[argc++] = machine;
295 if (user && !(daemon_over_rsh && dash_l_set)) {
300 if (user && !(daemon_over_rsh && dash_l_set)) {
304 args[argc++] = machine;
307 args[argc++] = rsync_path;
309 if (blocking_io < 0) {
311 if ((cp = strrchr(cmd, '/')) != NULL)
315 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
319 server_options(args,&argc);
321 if (argc >= MAX_ARGS - 2) {
322 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
323 exit_cleanup(RERR_SYNTAX);
329 if (!daemon_over_rsh && path && *path)
335 rprintf(FINFO,"cmd=");
336 for (i = 0; i < argc; i++)
337 rprintf(FINFO,"%s ",args[i]);
342 int from_gen_pipe[2];
343 if (fd_pair(from_gen_pipe) < 0) {
344 rsyserr(FERROR, errno, "pipe");
345 exit_cleanup(RERR_IPC);
347 batch_gen_fd = from_gen_pipe[0];
348 *f_out = from_gen_pipe[1];
350 ret = -1; /* no child pid */
351 } else if (local_server) {
352 /* If the user didn't request --[no-]whole-file, force
353 * it on, but only if we're not batch processing. */
354 if (whole_file < 0 && !write_batch)
356 ret = local_child(argc, args, f_in, f_out, child_main);
358 ret = piped_child(args,f_in,f_out);
366 out_of_memory("do_cmd");
367 return 0; /* not reached */
371 static char *get_local_name(struct file_list *flist,char *name)
377 rprintf(FINFO,"get_local_name count=%d %s\n",
378 flist->count, NS(name));
383 if (do_stat(name,&st) == 0) {
384 if (S_ISDIR(st.st_mode)) {
385 if (!push_dir(name)) {
386 rsyserr(FERROR, errno, "push_dir#1 %s failed",
388 exit_cleanup(RERR_FILESELECT);
392 if (flist->count > 1) {
393 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
394 exit_cleanup(RERR_FILESELECT);
399 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
402 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
403 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
404 exit_cleanup(RERR_FILEIO);
407 rprintf(FINFO, "created directory %s\n", name);
414 if (!push_dir(name)) {
415 rsyserr(FERROR, errno, "push_dir#2 %s failed",
417 exit_cleanup(RERR_FILESELECT);
424 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
427 struct file_list *flist;
431 rprintf(FINFO, "server_sender starting pid=%ld\n",
435 if (am_daemon && lp_write_only(module_id)) {
436 rprintf(FERROR, "ERROR: module is write only\n");
437 exit_cleanup(RERR_SYNTAX);
441 if (!relative_paths && !push_dir(dir)) {
442 rsyserr(FERROR, errno, "push_dir#3 %s failed",
444 exit_cleanup(RERR_FILESELECT);
449 if (strcmp(dir,".")) {
451 if (strcmp(dir,"/") == 0)
453 for (i = 0; i < argc; i++)
457 if (argc == 0 && (recurse || list_only)) {
463 flist = send_file_list(f_out,argc,argv);
464 if (!flist || flist->count == 0) {
468 io_start_buffering_in();
469 io_start_buffering_out();
471 send_files(flist,f_out,f_in);
472 io_flush(FULL_FLUSH);
474 if (protocol_version >= 24) {
475 /* final goodbye message */
478 io_flush(FULL_FLUSH);
483 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
487 int error_pipe[2], name_pipe[2];
488 BOOL need_name_pipe = (basis_dir[0] || partial_dir) && !dry_run;
490 /* The receiving side mustn't obey this, or an existing symlink that
491 * points to an identical file won't be replaced by the referent. */
494 if (preserve_hard_links)
495 init_hard_links(flist);
498 /* I moved this here from recv_files() to prevent a race condition */
499 if (recurse && !local_name && flist->count > 0)
503 if (fd_pair(error_pipe) < 0
504 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
505 rsyserr(FERROR, errno, "pipe failed in do_recv");
506 exit_cleanup(RERR_IPC);
509 io_flush(NORMAL_FLUSH);
511 if ((pid = do_fork()) == -1) {
512 rsyserr(FERROR, errno, "fork failed in do_recv");
513 exit_cleanup(RERR_IPC);
517 close(error_pipe[0]);
518 if (need_name_pipe) {
520 set_blocking(name_pipe[0]);
526 /* we can't let two processes write to the socket at one time */
527 close_multiplexing_out();
529 /* set place to send errors */
530 set_msg_fd_out(error_pipe[1]);
532 recv_files(f_in, flist, local_name, name_pipe[0]);
533 io_flush(FULL_FLUSH);
536 send_msg(MSG_DONE, "", 0);
537 io_flush(FULL_FLUSH);
538 /* finally we go to sleep until our parent kills us
539 * with a USR2 signal. We sleep for a short time as on
540 * some OSes a signal won't interrupt a sleep! */
546 close_multiplexing_in();
550 close(error_pipe[1]);
551 if (need_name_pipe) {
553 set_nonblocking(name_pipe[1]);
559 io_start_buffering_out();
561 set_msg_fd_in(error_pipe[0]);
563 generate_files(f_out, flist, local_name, name_pipe[1]);
566 io_flush(FULL_FLUSH);
567 if (protocol_version >= 24) {
568 /* send a final goodbye message */
569 write_int(f_out, -1);
571 io_flush(FULL_FLUSH);
575 wait_process(pid, &status);
580 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
583 struct file_list *flist;
584 char *local_name = NULL;
586 int save_verbose = verbose;
588 if (filesfrom_fd >= 0) {
589 /* We can't mix messages with files-from data on the socket,
590 * so temporarily turn off verbose messages. */
595 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
596 argc, (long)getpid());
599 if (am_daemon && lp_read_only(module_id)) {
600 rprintf(FERROR,"ERROR: module is read only\n");
601 exit_cleanup(RERR_SYNTAX);
610 if (!am_daemon && !push_dir(dir)) {
611 rsyserr(FERROR, errno, "push_dir#4 %s failed",
613 exit_cleanup(RERR_FILESELECT);
617 io_start_buffering_in();
618 if (delete_mode && !delete_excluded)
619 recv_filter_list(f_in);
623 if (filesfrom_fd >= 0) {
624 /* We need to send the files-from names to the sender at the
625 * same time that we receive the file-list from them, so we
626 * need the IO routines to automatically write out the names
627 * onto our f_out socket as we read the file-list. This
628 * avoids both deadlock and extra delays/buffers. */
629 io_set_filesfrom_fds(filesfrom_fd, f_out);
633 flist = recv_file_list(f_in);
634 verbose = save_verbose;
636 rprintf(FERROR,"server_recv: recv_file_list error\n");
637 exit_cleanup(RERR_FILESELECT);
641 if (strcmp(dir,".")) {
642 argv[0] += strlen(dir);
643 if (argv[0][0] == '/')
646 local_name = get_local_name(flist,argv[0]);
649 status = do_recv(f_in,f_out,flist,local_name);
650 exit_cleanup(status);
654 int child_main(int argc, char *argv[])
656 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
661 void start_server(int f_in, int f_out, int argc, char *argv[])
663 set_nonblocking(f_in);
664 set_nonblocking(f_out);
666 io_set_sock_fds(f_in, f_out);
667 setup_protocol(f_out, f_in);
669 if (protocol_version >= 23)
670 io_start_multiplex_out();
673 keep_dirlinks = 0; /* Must be disabled on the sender. */
675 recv_filter_list(f_in);
678 do_server_sender(f_in, f_out, argc, argv);
680 do_server_recv(f_in, f_out, argc, argv);
687 * This is called once the connection has been negotiated. It is used
688 * for rsyncd, remote-shell, and local connections.
690 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
692 struct file_list *flist = NULL;
693 int status = 0, status2 = 0;
694 char *local_name = NULL;
696 cleanup_child_pid = pid;
698 set_nonblocking(f_in);
699 set_nonblocking(f_out);
702 io_set_sock_fds(f_in, f_out);
703 setup_protocol(f_out,f_in);
705 if (protocol_version >= 23 && !read_batch)
706 io_start_multiplex_in();
708 /* We set our stderr file handle to blocking because ssh might have
709 * set it to non-blocking. This can be particularly troublesome if
710 * stderr is a clone of stdout, because ssh would have set our stdout
711 * to non-blocking at the same time (which can easily cause us to lose
712 * output from our print statements). This kluge shouldn't cause ssh
713 * any problems for how we use it. Note also that we delayed setting
714 * this until after the above protocol setup so that we know for sure
715 * that ssh is done twiddling its file descriptors. */
716 set_blocking(STDERR_FILENO);
719 keep_dirlinks = 0; /* Must be disabled on the sender. */
720 io_start_buffering_out();
721 if (!remote_filesfrom_file)
725 if (delete_mode && !delete_excluded)
726 send_filter_list(f_out);
727 if (remote_filesfrom_file)
731 start_write_batch(f_out);
732 if (!read_batch) /* don't write to pipe */
733 flist = send_file_list(f_out,argc,argv);
736 rprintf(FINFO,"file list sent\n");
738 io_flush(NORMAL_FLUSH);
739 send_files(flist,f_out,f_in);
740 io_flush(FULL_FLUSH);
741 if (protocol_version >= 24) {
742 /* final goodbye message */
747 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
748 io_flush(FULL_FLUSH);
749 wait_process(pid, &status);
752 io_flush(FULL_FLUSH);
753 exit_cleanup(status);
760 send_filter_list(f_out);
764 if (filesfrom_fd >= 0) {
765 io_set_filesfrom_fds(filesfrom_fd, f_out);
770 start_write_batch(f_in);
771 flist = recv_file_list(f_in);
772 if (!flist || flist->count == 0) {
773 rprintf(FINFO, "client: nothing to do: "
774 "perhaps you need to specify some filenames or "
775 "the --recursive option?\n");
779 local_name = get_local_name(flist,argv[0]);
781 status2 = do_recv(f_in,f_out,flist,local_name);
785 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
786 io_flush(FULL_FLUSH);
787 wait_process(pid, &status);
790 return MAX(status, status2);
793 static int copy_argv (char *argv[])
797 for (i = 0; argv[i]; i++) {
798 if (!(argv[i] = strdup(argv[i]))) {
799 rprintf (FERROR, "out of memory at %s(%d)\n",
810 * Start a client for either type of remote connection. Work out
811 * whether the arguments request a remote shell or rsyncd connection,
812 * and call the appropriate connection function, then run_client.
814 * Calls either start_socket_client (for sockets) or do_cmd and
815 * client_run (for ssh).
817 static int start_client(int argc, char *argv[])
820 char *shell_machine = NULL;
821 char *shell_path = NULL;
822 char *shell_user = NULL;
828 /* Don't clobber argv[] so that ps(1) can still show the right
830 if ((rc = copy_argv(argv)))
833 /* rsync:// always uses rsync server over direct socket connection */
834 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
838 host = argv[0] + strlen(URL_PREFIX);
839 p = strchr(host,'/');
845 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
851 p = strchr(host, ':');
853 rsync_port = atoi(p+1);
856 return start_socket_client(host, path, argc-1, argv+1);
859 if (!read_batch) { /* for read_batch, NO source is specified */
860 p = find_colon(argv[0]);
861 if (p) { /* source is remote */
862 if (remote_filesfrom_file
863 && remote_filesfrom_file != files_from + 1
864 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
866 "--files-from hostname is not the same as the transfer hostname\n");
867 exit_cleanup(RERR_SYNTAX);
869 if (p[1] == ':') { /* double colon */
872 return start_socket_client(argv[0], p+2,
879 if (argc < 1) { /* destination required */
881 exit_cleanup(RERR_SYNTAX);
886 shell_machine = argv[0];
889 } else { /* source is local */
892 /* rsync:// destination uses rsync server over direct socket */
893 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
896 host = argv[argc-1] + strlen(URL_PREFIX);
897 p = strchr(host,'/');
903 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
909 p = strchr(host, ':');
911 rsync_port = atoi(p+1);
914 return start_socket_client(host, path, argc-1, argv);
917 p = find_colon(argv[argc-1]); /* look in dest arg */
918 if (p && remote_filesfrom_file
919 && remote_filesfrom_file != files_from + 1
920 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
922 "--files-from hostname is not the same as the transfer hostname\n");
923 exit_cleanup(RERR_SYNTAX);
925 if (!p) { /* no colon found, so src & dest are local */
927 if (remote_filesfrom_file) {
929 "--files-from cannot be remote when the transfer is local\n");
930 exit_cleanup(RERR_SYNTAX);
932 } else if (p[1] == ':') { /* double colon */
935 return start_socket_client(argv[argc-1], p+2,
944 exit_cleanup(RERR_SYNTAX);
948 shell_machine = NULL;
949 shell_path = argv[argc-1];
952 shell_machine = argv[argc-1];
957 } else { /* read_batch */
959 shell_path = argv[argc-1];
960 if (find_colon(shell_path)) {
961 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
962 exit_cleanup(RERR_SYNTAX);
967 p = strrchr(shell_machine,'@');
970 shell_user = shell_machine;
976 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
977 shell_cmd?shell_cmd:"",
978 shell_machine?shell_machine:"",
979 shell_user?shell_user:"",
980 shell_path?shell_path:"");
983 /* for remote source, only single dest arg can remain ... */
984 if (!am_sender && argc > 1) {
986 exit_cleanup(RERR_SYNTAX);
989 /* ... or no dest at all */
990 if (!am_sender && argc == 0)
993 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
996 /* if we're running an rsync server on the remote host over a
997 * remote shell command, we need to do the RSYNCD protocol first */
998 if (daemon_over_rsh) {
1000 tmpret = start_inband_exchange(shell_user, shell_path,
1006 ret = client_run(f_in, f_out, pid, argc, argv);
1015 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1017 exit_cleanup(RERR_SIGNAL);
1020 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1022 if (log_got_error) _exit(RERR_PARTIAL);
1026 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1031 /* An empty waitpid() loop was put here by Tridge and we could never
1032 * get him to explain why he put it in, so rather than taking it
1033 * out we're instead saving the child exit statuses for later use.
1034 * The waitpid() loop presumably eliminates all possibility of leaving
1035 * zombie children, maybe that's why he did it.
1037 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1038 /* save the child's exit status */
1039 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1040 if (pid_stat_table[cnt].pid == 0) {
1041 pid_stat_table[cnt].pid = pid;
1042 pid_stat_table[cnt].status = status;
1052 * This routine catches signals and tries to send them to gdb.
1054 * Because it's called from inside a signal handler it ought not to
1055 * use too many library routines.
1057 * @todo Perhaps use "screen -X" instead/as well, to help people
1058 * debugging without easy access to X. Perhaps use an environment
1059 * variable, or just call a script?
1061 * @todo The /proc/ magic probably only works on Linux (and
1062 * Solaris?) Can we be more portable?
1064 #ifdef MAINTAINER_MODE
1065 const char *get_panic_action(void)
1067 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1072 return "xterm -display :0 -T Panic -n Panic "
1073 "-e gdb /proc/%d/exe %d";
1078 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1080 * This signal handler is only installed if we were configured with
1081 * --enable-maintainer-mode. Perhaps it should always be on and we
1082 * should just look at the environment variable, but I'm a bit leery
1083 * of a signal sending us into a busy loop.
1085 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1090 sprintf(cmd_buf, get_panic_action(),
1091 getpid(), getpid());
1093 /* Unless we failed to execute gdb, we allow the process to
1094 * continue. I'm not sure if that's right. */
1095 ret = system(cmd_buf);
1102 int main(int argc,char *argv[])
1105 int orig_argc = argc;
1106 char **orig_argv = argv;
1108 signal(SIGUSR1, sigusr1_handler);
1109 signal(SIGUSR2, sigusr2_handler);
1110 signal(SIGCHLD, sigchld_handler);
1111 #ifdef MAINTAINER_MODE
1112 signal(SIGSEGV, rsync_panic_handler);
1113 signal(SIGFPE, rsync_panic_handler);
1114 signal(SIGABRT, rsync_panic_handler);
1115 signal(SIGBUS, rsync_panic_handler);
1116 #endif /* def MAINTAINER_MODE */
1118 starttime = time(NULL);
1119 am_root = (MY_UID() == 0);
1121 memset(&stats, 0, sizeof(stats));
1125 exit_cleanup(RERR_SYNTAX);
1128 /* we set a 0 umask so that correct file permissions can be
1130 orig_umask = (int)umask(0);
1132 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1133 /* FIXME: We ought to call the same error-handling
1134 * code here, rather than relying on getopt. */
1136 exit_cleanup(RERR_SYNTAX);
1139 signal(SIGINT,SIGNAL_CAST sig_int);
1140 signal(SIGHUP,SIGNAL_CAST sig_int);
1141 signal(SIGTERM,SIGNAL_CAST sig_int);
1143 /* Ignore SIGPIPE; we consistently check error codes and will
1145 signal(SIGPIPE, SIG_IGN);
1147 /* Initialize push_dir here because on some old systems getcwd
1148 * (implemented by forking "pwd" and reading its output) doesn't
1149 * work when there are other child processes. Also, on all systems
1150 * that implement getcwd that way "pwd" can't be found after chroot. */
1155 if (write_batch || read_batch) {
1157 write_batch_shell_file(orig_argc, orig_argv, argc);
1159 if (read_batch && strcmp(batch_name, "-") == 0)
1160 batch_fd = STDIN_FILENO;
1162 batch_fd = do_open(batch_name,
1163 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1164 : O_RDONLY, S_IRUSR | S_IWUSR);
1167 rsyserr(FERROR, errno, "Batch file %s open error",
1169 exit_cleanup(RERR_FILEIO);
1172 read_stream_flags(batch_fd);
1175 if (am_daemon && !am_server)
1176 return daemon_main();
1180 exit_cleanup(RERR_SYNTAX);
1184 verbose = MAX(verbose,1);
1187 set_nonblocking(STDIN_FILENO);
1188 set_nonblocking(STDOUT_FILENO);
1190 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1191 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1194 ret = start_client(argc, argv);
1196 exit_cleanup(RERR_STARTCLIENT);