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_excluded;
37 extern int delete_after;
38 extern int daemon_over_rsh;
42 extern int local_server;
43 extern int log_got_error;
45 extern int orig_umask;
46 extern int copy_links;
47 extern int keep_dirlinks;
48 extern int preserve_hard_links;
49 extern int protocol_version;
51 extern int relative_paths;
52 extern int rsync_port;
53 extern int whole_file;
54 extern int read_batch;
55 extern int write_batch;
57 extern int batch_gen_fd;
58 extern int filesfrom_fd;
59 extern pid_t cleanup_child_pid;
60 extern char *files_from;
61 extern char *remote_filesfrom_file;
62 extern char *compare_dest;
63 extern char *rsync_path;
64 extern char *shell_cmd;
65 extern char *batch_name;
68 /* there's probably never more than at most 2 outstanding child processes,
69 * but set it higher just in case.
71 #define MAXCHILDPROCS 5
76 } pid_stat_table[MAXCHILDPROCS];
78 static void show_malloc_stats(void);
80 /****************************************************************************
81 wait for a process to exit, calling io_flush while waiting
82 ****************************************************************************/
83 void wait_process(pid_t pid, int *status)
88 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
93 if (waited_pid == -1 && errno == ECHILD) {
94 /* status of requested child no longer available.
95 * check to see if it was processed by the sigchld_handler.
97 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
98 if (pid == pid_stat_table[cnt].pid) {
99 *status = pid_stat_table[cnt].status;
100 pid_stat_table[cnt].pid = 0;
106 /* TODO: If the child exited on a signal, then log an
107 * appropriate error message. Perhaps we should also accept a
108 * message describing the purpose of the child. Also indicate
109 * this to the caller so that thhey know something went
111 *status = WEXITSTATUS(*status);
114 /* This function gets called from all 3 processes. We want the client side
115 * to actually output the text, but the sender is the only process that has
116 * all the stats we need. So, if we're a client sender, we do the report.
117 * If we're a server sender, we write the stats on the supplied fd. If
118 * we're the client receiver we read the stats from the supplied fd and do
119 * the report. All processes might also generate a set of debug stats, if
120 * the verbose level is high enough (this is the only thing that the
121 * generator process and the server receiver ever do here). */
122 static void report(int f)
124 /* Cache two stats because the read/write code can change it. */
125 int64 total_read = stats.total_read;
126 int64 total_written = stats.total_written;
127 time_t t = time(NULL);
129 if (do_stats && verbose > 1) {
130 /* These come out from every process */
139 log_exit(0, __FILE__, __LINE__);
140 if (f == -1 || !am_sender)
146 write_longint(f, total_read);
147 write_longint(f, total_written);
148 write_longint(f, stats.total_size);
153 /* this is the client */
156 /* Read the first two in opposite order because the meaning of
157 * read/write swaps when switching from sender to receiver. */
158 total_written = read_longint(f);
159 total_read = read_longint(f);
160 stats.total_size = read_longint(f);
161 } else if (write_batch) {
162 /* The --read-batch process is going to be a client
163 * receiver, so we need to give it the stats. */
164 write_longint(batch_fd, total_read);
165 write_longint(batch_fd, total_written);
166 write_longint(batch_fd, stats.total_size);
170 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
171 rprintf(FINFO,"Number of files transferred: %d\n",
172 stats.num_transferred_files);
173 rprintf(FINFO,"Total file size: %.0f bytes\n",
174 (double)stats.total_size);
175 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
176 (double)stats.total_transferred_size);
177 rprintf(FINFO,"Literal data: %.0f bytes\n",
178 (double)stats.literal_data);
179 rprintf(FINFO,"Matched data: %.0f bytes\n",
180 (double)stats.matched_data);
181 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
182 rprintf(FINFO,"Total bytes sent: %.0f\n",
183 (double)total_written);
184 rprintf(FINFO,"Total bytes received: %.0f\n",
188 if (verbose || do_stats) {
190 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
191 (double)total_written, (double)total_read,
192 (total_written + total_read)/(0.5 + (t - starttime)));
193 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
194 (double)stats.total_size,
195 (double)stats.total_size / (total_written+total_read));
204 * If our C library can get malloc statistics, then show them to FINFO
206 static void show_malloc_stats(void)
213 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
215 am_server ? "server " : "",
216 am_daemon ? "daemon " : "",
218 rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena);
219 rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks);
220 rprintf(FINFO, " smblks: %10d\n", mi.smblks);
221 rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks);
222 rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd);
223 rprintf(FINFO, " allmem: %10d (bytes from sbrk + mmap)\n",
224 mi.arena + mi.hblkhd);
225 rprintf(FINFO, " usmblks: %10d\n", mi.usmblks);
226 rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks);
227 rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks);
228 rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks);
229 rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost);
230 #endif /* HAVE_MALLINFO */
234 /* Start the remote shell. cmd may be NULL to use the default. */
235 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
236 int *f_in, int *f_out)
239 char *args[MAX_ARGS];
241 char *tok, *dir = NULL;
244 if (!read_batch && !local_server) {
245 char *rsh_env = getenv(RSYNC_RSH_ENV);
254 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
255 /* Comparison leaves rooms for server_options(). */
256 if (argc >= MAX_ARGS - 100) {
257 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
258 exit_cleanup(RERR_SYNTAX);
263 /* check to see if we've already been given '-l user' in
264 * the remote-shell command */
265 for (i = 0; i < argc-1; i++) {
266 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
271 /* remsh (on HPUX) takes the arguments the other way around */
272 args[argc++] = machine;
273 if (user && !(daemon_over_rsh && dash_l_set)) {
278 if (user && !(daemon_over_rsh && dash_l_set)) {
282 args[argc++] = machine;
285 args[argc++] = rsync_path;
287 if (blocking_io < 0) {
289 if ((cp = strrchr(cmd, '/')) != NULL)
293 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
297 server_options(args,&argc);
299 if (argc >= MAX_ARGS - 2) {
300 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
301 exit_cleanup(RERR_SYNTAX);
307 if (!daemon_over_rsh && path && *path)
313 rprintf(FINFO,"cmd=");
314 for (i = 0; i < argc; i++)
315 rprintf(FINFO,"%s ",args[i]);
320 int from_gen_pipe[2];
321 if (fd_pair(from_gen_pipe) < 0) {
322 rsyserr(FERROR, errno, "pipe");
323 exit_cleanup(RERR_IPC);
325 batch_gen_fd = from_gen_pipe[0];
326 *f_out = from_gen_pipe[1];
328 ret = -1; /* no child pid */
329 } else if (local_server) {
330 /* If the user didn't request --[no-]whole-file, force
331 * it on, but only if we're not batch processing. */
332 if (whole_file < 0 && !write_batch)
334 ret = local_child(argc, args, f_in, f_out, child_main);
336 ret = piped_child(args,f_in,f_out);
344 out_of_memory("do_cmd");
345 return 0; /* not reached */
349 static char *get_local_name(struct file_list *flist,char *name)
355 rprintf(FINFO,"get_local_name count=%d %s\n",
356 flist->count, NS(name));
361 if (do_stat(name,&st) == 0) {
362 if (S_ISDIR(st.st_mode)) {
363 if (!push_dir(name)) {
364 rsyserr(FERROR, errno, "push_dir#1 %s failed",
366 exit_cleanup(RERR_FILESELECT);
370 if (flist->count > 1) {
371 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
372 exit_cleanup(RERR_FILESELECT);
377 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
380 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
381 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
382 exit_cleanup(RERR_FILEIO);
385 rprintf(FINFO, "created directory %s\n", name);
392 if (!push_dir(name)) {
393 rsyserr(FERROR, errno, "push_dir#2 %s failed",
395 exit_cleanup(RERR_FILESELECT);
402 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
405 struct file_list *flist;
409 rprintf(FINFO, "server_sender starting pid=%ld\n",
413 if (am_daemon && lp_write_only(module_id)) {
414 rprintf(FERROR, "ERROR: module is write only\n");
415 exit_cleanup(RERR_SYNTAX);
419 if (!relative_paths && !push_dir(dir)) {
420 rsyserr(FERROR, errno, "push_dir#3 %s failed",
422 exit_cleanup(RERR_FILESELECT);
427 if (strcmp(dir,".")) {
429 if (strcmp(dir,"/") == 0)
431 for (i = 0; i < argc; i++)
435 if (argc == 0 && recurse) {
441 flist = send_file_list(f_out,argc,argv);
442 if (!flist || flist->count == 0) {
446 io_start_buffering_in();
447 io_start_buffering_out();
449 send_files(flist,f_out,f_in);
450 io_flush(FULL_FLUSH);
452 if (protocol_version >= 24) {
453 /* final goodbye message */
456 io_flush(FULL_FLUSH);
461 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
465 int error_pipe[2], name_pipe[2];
466 BOOL need_name_pipe = compare_dest && !dry_run;
468 /* The receiving side mustn't obey this, or an existing symlink that
469 * points to an identical file won't be replaced by the referent. */
472 if (preserve_hard_links)
473 init_hard_links(flist);
476 /* I moved this here from recv_files() to prevent a race condition */
477 if (recurse && delete_mode && !local_name && flist->count > 0)
481 if (fd_pair(error_pipe) < 0
482 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
483 rsyserr(FERROR, errno, "pipe failed in do_recv");
484 exit_cleanup(RERR_IPC);
487 io_flush(NORMAL_FLUSH);
489 if ((pid = do_fork()) == -1) {
490 rsyserr(FERROR, errno, "fork failed in do_recv");
491 exit_cleanup(RERR_IPC);
495 close(error_pipe[0]);
496 if (need_name_pipe) {
498 set_blocking(name_pipe[0]);
504 /* we can't let two processes write to the socket at one time */
505 close_multiplexing_out();
507 /* set place to send errors */
508 set_msg_fd_out(error_pipe[1]);
510 recv_files(f_in, flist, local_name, name_pipe[0]);
511 io_flush(FULL_FLUSH);
514 send_msg(MSG_DONE, "", 0);
515 io_flush(FULL_FLUSH);
516 /* finally we go to sleep until our parent kills us
517 * with a USR2 signal. We sleep for a short time as on
518 * some OSes a signal won't interrupt a sleep! */
524 close_multiplexing_in();
528 close(error_pipe[1]);
529 if (need_name_pipe) {
531 set_nonblocking(name_pipe[1]);
537 io_start_buffering_out();
539 set_msg_fd_in(error_pipe[0]);
541 generate_files(f_out, flist, local_name, name_pipe[1]);
543 get_redo_num(); /* Read final MSG_DONE and any prior messages. */
545 io_flush(FULL_FLUSH);
546 if (protocol_version >= 24) {
547 /* send a final goodbye message */
548 write_int(f_out, -1);
550 io_flush(FULL_FLUSH);
554 wait_process(pid, &status);
559 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
562 struct file_list *flist;
563 char *local_name = NULL;
567 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
568 argc, (long)getpid());
571 if (am_daemon && lp_read_only(module_id)) {
572 rprintf(FERROR,"ERROR: module is read only\n");
573 exit_cleanup(RERR_SYNTAX);
582 if (!am_daemon && !push_dir(dir)) {
583 rsyserr(FERROR, errno, "push_dir#4 %s failed",
585 exit_cleanup(RERR_FILESELECT);
589 io_start_buffering_in();
590 if (delete_mode && !delete_excluded)
591 recv_exclude_list(f_in);
593 if (filesfrom_fd >= 0) {
594 /* We're receiving the file info from the sender, so we need
595 * the IO routines to automatically write out the names onto
596 * our f_out socket as we read the list info from the sender.
597 * This avoids both deadlock and extra delays/buffers. */
598 io_set_filesfrom_fds(filesfrom_fd, f_out);
602 flist = recv_file_list(f_in);
604 rprintf(FERROR,"server_recv: recv_file_list error\n");
605 exit_cleanup(RERR_FILESELECT);
609 if (strcmp(dir,".")) {
610 argv[0] += strlen(dir);
611 if (argv[0][0] == '/')
614 local_name = get_local_name(flist,argv[0]);
617 status = do_recv(f_in,f_out,flist,local_name);
618 exit_cleanup(status);
622 int child_main(int argc, char *argv[])
624 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
629 void start_server(int f_in, int f_out, int argc, char *argv[])
631 set_nonblocking(f_in);
632 set_nonblocking(f_out);
634 io_set_sock_fds(f_in, f_out);
635 setup_protocol(f_out, f_in);
637 if (protocol_version >= 23)
638 io_start_multiplex_out();
641 keep_dirlinks = 0; /* Must be disabled on the sender. */
643 recv_exclude_list(f_in);
646 do_server_sender(f_in, f_out, argc, argv);
648 do_server_recv(f_in, f_out, argc, argv);
655 * This is called once the connection has been negotiated. It is used
656 * for rsyncd, remote-shell, and local connections.
658 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
660 struct file_list *flist = NULL;
661 int status = 0, status2 = 0;
662 char *local_name = NULL;
664 cleanup_child_pid = pid;
666 assert(am_sender == 0);
668 set_nonblocking(f_in);
669 set_nonblocking(f_out);
672 io_set_sock_fds(f_in, f_out);
673 setup_protocol(f_out,f_in);
675 if (protocol_version >= 23 && !read_batch)
676 io_start_multiplex_in();
678 /* We set our stderr file handle to blocking because ssh might have
679 * set it to non-blocking. This can be particularly troublesome if
680 * stderr is a clone of stdout, because ssh would have set our stdout
681 * to non-blocking at the same time (which can easily cause us to lose
682 * output from our print statements). This kluge shouldn't cause ssh
683 * any problems for how we use it. Note also that we delayed setting
684 * this until after the above protocol setup so that we know for sure
685 * that ssh is done twiddling its file descriptors. */
686 set_blocking(STDERR_FILENO);
689 keep_dirlinks = 0; /* Must be disabled on the sender. */
690 io_start_buffering_out();
693 if (delete_mode && !delete_excluded)
694 send_exclude_list(f_out);
695 if (remote_filesfrom_file)
699 start_write_batch(f_out);
700 if (!read_batch) /* don't write to pipe */
701 flist = send_file_list(f_out,argc,argv);
703 rprintf(FINFO,"file list sent\n");
705 io_flush(NORMAL_FLUSH);
706 send_files(flist,f_out,f_in);
707 io_flush(FULL_FLUSH);
708 if (protocol_version >= 24) {
709 /* final goodbye message */
714 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
715 io_flush(FULL_FLUSH);
716 wait_process(pid, &status);
719 io_flush(FULL_FLUSH);
720 exit_cleanup(status);
727 send_exclude_list(f_out);
729 if (filesfrom_fd >= 0) {
730 io_set_filesfrom_fds(filesfrom_fd, f_out);
735 start_write_batch(f_in);
736 flist = recv_file_list(f_in);
737 if (!flist || flist->count == 0) {
738 rprintf(FINFO, "client: nothing to do: "
739 "perhaps you need to specify some filenames or "
740 "the --recursive option?\n");
744 local_name = get_local_name(flist,argv[0]);
746 status2 = do_recv(f_in,f_out,flist,local_name);
750 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
751 io_flush(FULL_FLUSH);
752 wait_process(pid, &status);
755 return MAX(status, status2);
758 static int copy_argv (char *argv[])
762 for (i = 0; argv[i]; i++) {
763 if (!(argv[i] = strdup(argv[i]))) {
764 rprintf (FERROR, "out of memory at %s(%d)\n",
775 * Start a client for either type of remote connection. Work out
776 * whether the arguments request a remote shell or rsyncd connection,
777 * and call the appropriate connection function, then run_client.
779 * Calls either start_socket_client (for sockets) or do_cmd and
780 * client_run (for ssh).
782 static int start_client(int argc, char *argv[])
785 char *shell_machine = NULL;
786 char *shell_path = NULL;
787 char *shell_user = NULL;
793 /* Don't clobber argv[] so that ps(1) can still show the right
795 if ((rc = copy_argv(argv)))
798 /* rsync:// always uses rsync server over direct socket connection */
799 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
803 host = argv[0] + strlen(URL_PREFIX);
804 p = strchr(host,'/');
810 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
816 p = strchr(host, ':');
818 rsync_port = atoi(p+1);
821 return start_socket_client(host, path, argc-1, argv+1);
824 if (!read_batch) { /* for read_batch, NO source is specified */
825 p = find_colon(argv[0]);
826 if (p) { /* source is remote */
827 if (remote_filesfrom_file
828 && remote_filesfrom_file != files_from + 1
829 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
831 "--files-from hostname is not the same as the transfer hostname\n");
832 exit_cleanup(RERR_SYNTAX);
834 if (p[1] == ':') { /* double colon */
837 return start_socket_client(argv[0], p+2,
844 if (argc < 1) { /* destination required */
846 exit_cleanup(RERR_SYNTAX);
851 shell_machine = argv[0];
854 } else { /* source is local */
857 /* rsync:// destination uses rsync server over direct socket */
858 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
861 host = argv[argc-1] + strlen(URL_PREFIX);
862 p = strchr(host,'/');
868 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
874 p = strchr(host, ':');
876 rsync_port = atoi(p+1);
879 return start_socket_client(host, path, argc-1, argv);
882 p = find_colon(argv[argc-1]); /* look in dest arg */
883 if (p && remote_filesfrom_file
884 && remote_filesfrom_file != files_from + 1
885 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
887 "--files-from hostname is not the same as the transfer hostname\n");
888 exit_cleanup(RERR_SYNTAX);
890 if (!p) { /* no colon found, so src & dest are local */
892 if (remote_filesfrom_file) {
894 "--files-from cannot be remote when the transfer is local\n");
895 exit_cleanup(RERR_SYNTAX);
897 } else if (p[1] == ':') { /* double colon */
900 return start_socket_client(argv[argc-1], p+2,
909 exit_cleanup(RERR_SYNTAX);
913 shell_machine = NULL;
914 shell_path = argv[argc-1];
917 shell_machine = argv[argc-1];
922 } else { /* read_batch */
924 shell_path = argv[argc-1];
925 if (find_colon(shell_path)) {
926 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
927 exit_cleanup(RERR_SYNTAX);
932 p = strrchr(shell_machine,'@');
935 shell_user = shell_machine;
941 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
942 shell_cmd?shell_cmd:"",
943 shell_machine?shell_machine:"",
944 shell_user?shell_user:"",
945 shell_path?shell_path:"");
948 /* for remote source, only single dest arg can remain ... */
949 if (!am_sender && argc > 1) {
951 exit_cleanup(RERR_SYNTAX);
954 /* ... or no dest at all */
955 if (!am_sender && argc == 0) {
959 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
962 /* if we're running an rsync server on the remote host over a
963 * remote shell command, we need to do the RSYNCD protocol first */
964 if (daemon_over_rsh) {
966 tmpret = start_inband_exchange(shell_user, shell_path,
972 ret = client_run(f_in, f_out, pid, argc, argv);
981 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
983 exit_cleanup(RERR_SIGNAL);
986 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
988 if (log_got_error) _exit(RERR_PARTIAL);
992 static RETSIGTYPE sigchld_handler(UNUSED(int val))
997 /* An empty waitpid() loop was put here by Tridge and we could never
998 * get him to explain why he put it in, so rather than taking it
999 * out we're instead saving the child exit statuses for later use.
1000 * The waitpid() loop presumably eliminates all possibility of leaving
1001 * zombie children, maybe that's why he did it.
1003 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1004 /* save the child's exit status */
1005 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1006 if (pid_stat_table[cnt].pid == 0) {
1007 pid_stat_table[cnt].pid = pid;
1008 pid_stat_table[cnt].status = status;
1018 * This routine catches signals and tries to send them to gdb.
1020 * Because it's called from inside a signal handler it ought not to
1021 * use too many library routines.
1023 * @todo Perhaps use "screen -X" instead/as well, to help people
1024 * debugging without easy access to X. Perhaps use an environment
1025 * variable, or just call a script?
1027 * @todo The /proc/ magic probably only works on Linux (and
1028 * Solaris?) Can we be more portable?
1030 #ifdef MAINTAINER_MODE
1031 const char *get_panic_action(void)
1033 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1038 return "xterm -display :0 -T Panic -n Panic "
1039 "-e gdb /proc/%d/exe %d";
1044 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1046 * This signal handler is only installed if we were configured with
1047 * --enable-maintainer-mode. Perhaps it should always be on and we
1048 * should just look at the environment variable, but I'm a bit leery
1049 * of a signal sending us into a busy loop.
1051 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1056 sprintf(cmd_buf, get_panic_action(),
1057 getpid(), getpid());
1059 /* Unless we failed to execute gdb, we allow the process to
1060 * continue. I'm not sure if that's right. */
1061 ret = system(cmd_buf);
1068 int main(int argc,char *argv[])
1071 int orig_argc = argc;
1072 char **orig_argv = argv;
1074 signal(SIGUSR1, sigusr1_handler);
1075 signal(SIGUSR2, sigusr2_handler);
1076 signal(SIGCHLD, sigchld_handler);
1077 #ifdef MAINTAINER_MODE
1078 signal(SIGSEGV, rsync_panic_handler);
1079 signal(SIGFPE, rsync_panic_handler);
1080 signal(SIGABRT, rsync_panic_handler);
1081 signal(SIGBUS, rsync_panic_handler);
1082 #endif /* def MAINTAINER_MODE */
1084 starttime = time(NULL);
1085 am_root = (MY_UID() == 0);
1087 memset(&stats, 0, sizeof(stats));
1091 exit_cleanup(RERR_SYNTAX);
1094 /* we set a 0 umask so that correct file permissions can be
1096 orig_umask = (int)umask(0);
1098 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1099 /* FIXME: We ought to call the same error-handling
1100 * code here, rather than relying on getopt. */
1102 exit_cleanup(RERR_SYNTAX);
1105 signal(SIGINT,SIGNAL_CAST sig_int);
1106 signal(SIGHUP,SIGNAL_CAST sig_int);
1107 signal(SIGTERM,SIGNAL_CAST sig_int);
1109 /* Ignore SIGPIPE; we consistently check error codes and will
1111 signal(SIGPIPE, SIG_IGN);
1113 /* Initialize push_dir here because on some old systems getcwd
1114 * (implemented by forking "pwd" and reading its output) doesn't
1115 * work when there are other child processes. Also, on all systems
1116 * that implement getcwd that way "pwd" can't be found after chroot. */
1121 if (write_batch || read_batch) {
1123 write_batch_shell_file(orig_argc, orig_argv, argc);
1125 if (read_batch && strcmp(batch_name, "-") == 0)
1126 batch_fd = STDIN_FILENO;
1128 batch_fd = do_open(batch_name,
1129 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1130 : O_RDONLY, S_IRUSR | S_IWUSR);
1133 rsyserr(FERROR, errno, "Batch file %s open error",
1135 exit_cleanup(RERR_FILEIO);
1138 read_stream_flags(batch_fd);
1141 if (am_daemon && !am_server)
1142 return daemon_main();
1146 exit_cleanup(RERR_SYNTAX);
1150 verbose = MAX(verbose,1);
1153 set_nonblocking(STDIN_FILENO);
1154 set_nonblocking(STDOUT_FILENO);
1156 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1157 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1160 ret = start_client(argc, argv);
1162 exit_cleanup(RERR_STARTCLIENT);