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);
155 /* this is the client */
158 /* Read the first two in opposite order because the meaning of
159 * read/write swaps when switching from sender to receiver. */
160 total_written = read_longint(f);
161 total_read = read_longint(f);
162 stats.total_size = read_longint(f);
163 } else if (write_batch) {
164 /* The --read-batch process is going to be a client
165 * receiver, so we need to give it the stats. */
166 write_longint(batch_fd, total_read);
167 write_longint(batch_fd, total_written);
168 write_longint(batch_fd, stats.total_size);
172 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
173 rprintf(FINFO,"Number of files transferred: %d\n",
174 stats.num_transferred_files);
175 rprintf(FINFO,"Total file size: %.0f bytes\n",
176 (double)stats.total_size);
177 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
178 (double)stats.total_transferred_size);
179 rprintf(FINFO,"Literal data: %.0f bytes\n",
180 (double)stats.literal_data);
181 rprintf(FINFO,"Matched data: %.0f bytes\n",
182 (double)stats.matched_data);
183 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
184 rprintf(FINFO,"Total bytes sent: %.0f\n",
185 (double)total_written);
186 rprintf(FINFO,"Total bytes received: %.0f\n",
190 if (verbose || do_stats) {
192 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
193 (double)total_written, (double)total_read,
194 (total_written + total_read)/(0.5 + (t - starttime)));
195 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
196 (double)stats.total_size,
197 (double)stats.total_size / (total_written+total_read));
206 * If our C library can get malloc statistics, then show them to FINFO
208 static void show_malloc_stats(void)
215 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
217 am_server ? "server " : "",
218 am_daemon ? "daemon " : "",
220 rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena);
221 rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks);
222 rprintf(FINFO, " smblks: %10d\n", mi.smblks);
223 rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks);
224 rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd);
225 rprintf(FINFO, " allmem: %10d (bytes from sbrk + mmap)\n",
226 mi.arena + mi.hblkhd);
227 rprintf(FINFO, " usmblks: %10d\n", mi.usmblks);
228 rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks);
229 rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks);
230 rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks);
231 rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost);
232 #endif /* HAVE_MALLINFO */
236 /* Start the remote shell. cmd may be NULL to use the default. */
237 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
238 int *f_in, int *f_out)
241 char *args[MAX_ARGS];
243 char *tok, *dir = NULL;
246 if (!read_batch && !local_server) {
247 char *rsh_env = getenv(RSYNC_RSH_ENV);
256 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
257 /* Comparison leaves rooms for server_options(). */
258 if (argc >= MAX_ARGS - 100) {
259 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
260 exit_cleanup(RERR_SYNTAX);
265 /* check to see if we've already been given '-l user' in
266 * the remote-shell command */
267 for (i = 0; i < argc-1; i++) {
268 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
273 /* remsh (on HPUX) takes the arguments the other way around */
274 args[argc++] = machine;
275 if (user && !(daemon_over_rsh && dash_l_set)) {
280 if (user && !(daemon_over_rsh && dash_l_set)) {
284 args[argc++] = machine;
287 args[argc++] = rsync_path;
289 if (blocking_io < 0) {
291 if ((cp = strrchr(cmd, '/')) != NULL)
295 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
299 server_options(args,&argc);
301 if (argc >= MAX_ARGS - 2) {
302 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
303 exit_cleanup(RERR_SYNTAX);
309 if (!daemon_over_rsh && path && *path)
315 rprintf(FINFO,"cmd=");
316 for (i = 0; i < argc; i++)
317 rprintf(FINFO,"%s ",args[i]);
322 int from_gen_pipe[2];
323 if (fd_pair(from_gen_pipe) < 0) {
324 rsyserr(FERROR, errno, "pipe");
325 exit_cleanup(RERR_IPC);
327 batch_gen_fd = from_gen_pipe[0];
328 *f_out = from_gen_pipe[1];
330 ret = -1; /* no child pid */
331 } else if (local_server) {
332 /* If the user didn't request --[no-]whole-file, force
333 * it on, but only if we're not batch processing. */
334 if (whole_file < 0 && !write_batch)
336 ret = local_child(argc, args, f_in, f_out, child_main);
338 ret = piped_child(args,f_in,f_out);
346 out_of_memory("do_cmd");
347 return 0; /* not reached */
351 static char *get_local_name(struct file_list *flist,char *name)
357 rprintf(FINFO,"get_local_name count=%d %s\n",
358 flist->count, NS(name));
363 if (do_stat(name,&st) == 0) {
364 if (S_ISDIR(st.st_mode)) {
365 if (!push_dir(name)) {
366 rsyserr(FERROR, errno, "push_dir#1 %s failed",
368 exit_cleanup(RERR_FILESELECT);
372 if (flist->count > 1) {
373 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
374 exit_cleanup(RERR_FILESELECT);
379 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
382 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
383 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
384 exit_cleanup(RERR_FILEIO);
387 rprintf(FINFO, "created directory %s\n", name);
394 if (!push_dir(name)) {
395 rsyserr(FERROR, errno, "push_dir#2 %s failed",
397 exit_cleanup(RERR_FILESELECT);
404 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
407 struct file_list *flist;
411 rprintf(FINFO, "server_sender starting pid=%ld\n",
415 if (am_daemon && lp_write_only(module_id)) {
416 rprintf(FERROR, "ERROR: module is write only\n");
417 exit_cleanup(RERR_SYNTAX);
421 if (!relative_paths && !push_dir(dir)) {
422 rsyserr(FERROR, errno, "push_dir#3 %s failed",
424 exit_cleanup(RERR_FILESELECT);
429 if (strcmp(dir,".")) {
431 if (strcmp(dir,"/") == 0)
433 for (i = 0; i < argc; i++)
437 if (argc == 0 && (recurse || list_only)) {
443 flist = send_file_list(f_out,argc,argv);
444 if (!flist || flist->count == 0) {
448 io_start_buffering_in();
449 io_start_buffering_out();
451 send_files(flist,f_out,f_in);
452 io_flush(FULL_FLUSH);
454 if (protocol_version >= 24) {
455 /* final goodbye message */
458 io_flush(FULL_FLUSH);
463 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
467 int error_pipe[2], name_pipe[2];
468 BOOL need_name_pipe = (basis_dir[0] || partial_dir) && !dry_run;
470 /* The receiving side mustn't obey this, or an existing symlink that
471 * points to an identical file won't be replaced by the referent. */
474 if (preserve_hard_links)
475 init_hard_links(flist);
478 /* I moved this here from recv_files() to prevent a race condition */
479 if (recurse && !local_name && flist->count > 0)
483 if (fd_pair(error_pipe) < 0
484 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
485 rsyserr(FERROR, errno, "pipe failed in do_recv");
486 exit_cleanup(RERR_IPC);
489 io_flush(NORMAL_FLUSH);
491 if ((pid = do_fork()) == -1) {
492 rsyserr(FERROR, errno, "fork failed in do_recv");
493 exit_cleanup(RERR_IPC);
497 close(error_pipe[0]);
498 if (need_name_pipe) {
500 set_blocking(name_pipe[0]);
506 /* we can't let two processes write to the socket at one time */
507 close_multiplexing_out();
509 /* set place to send errors */
510 set_msg_fd_out(error_pipe[1]);
512 recv_files(f_in, flist, local_name, name_pipe[0]);
513 io_flush(FULL_FLUSH);
516 send_msg(MSG_DONE, "", 0);
517 io_flush(FULL_FLUSH);
518 /* finally we go to sleep until our parent kills us
519 * with a USR2 signal. We sleep for a short time as on
520 * some OSes a signal won't interrupt a sleep! */
526 close_multiplexing_in();
530 close(error_pipe[1]);
531 if (need_name_pipe) {
533 set_nonblocking(name_pipe[1]);
539 io_start_buffering_out();
541 set_msg_fd_in(error_pipe[0]);
543 generate_files(f_out, flist, local_name, name_pipe[1]);
546 io_flush(FULL_FLUSH);
547 if (protocol_version >= 24) {
548 /* send a final goodbye message */
549 write_int(f_out, -1);
551 io_flush(FULL_FLUSH);
555 wait_process(pid, &status);
560 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
563 struct file_list *flist;
564 char *local_name = NULL;
566 int save_verbose = verbose;
568 if (filesfrom_fd >= 0) {
569 /* We can't mix messages with files-from data on the socket,
570 * so temporarily turn off verbose messages. */
575 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
576 argc, (long)getpid());
579 if (am_daemon && lp_read_only(module_id)) {
580 rprintf(FERROR,"ERROR: module is read only\n");
581 exit_cleanup(RERR_SYNTAX);
590 if (!am_daemon && !push_dir(dir)) {
591 rsyserr(FERROR, errno, "push_dir#4 %s failed",
593 exit_cleanup(RERR_FILESELECT);
597 io_start_buffering_in();
598 if (delete_mode && !delete_excluded)
599 recv_exclude_list(f_in);
601 if (filesfrom_fd >= 0) {
602 /* We need to send the files-from names to the sender at the
603 * same time that we receive the file-list from them, so we
604 * need the IO routines to automatically write out the names
605 * onto our f_out socket as we read the file-list. This
606 * avoids both deadlock and extra delays/buffers. */
607 io_set_filesfrom_fds(filesfrom_fd, f_out);
611 flist = recv_file_list(f_in);
612 verbose = save_verbose;
614 rprintf(FERROR,"server_recv: recv_file_list error\n");
615 exit_cleanup(RERR_FILESELECT);
619 if (strcmp(dir,".")) {
620 argv[0] += strlen(dir);
621 if (argv[0][0] == '/')
624 local_name = get_local_name(flist,argv[0]);
627 status = do_recv(f_in,f_out,flist,local_name);
628 exit_cleanup(status);
632 int child_main(int argc, char *argv[])
634 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
639 void start_server(int f_in, int f_out, int argc, char *argv[])
641 set_nonblocking(f_in);
642 set_nonblocking(f_out);
644 io_set_sock_fds(f_in, f_out);
645 setup_protocol(f_out, f_in);
647 if (protocol_version >= 23)
648 io_start_multiplex_out();
651 keep_dirlinks = 0; /* Must be disabled on the sender. */
653 recv_exclude_list(f_in);
656 do_server_sender(f_in, f_out, argc, argv);
658 do_server_recv(f_in, f_out, argc, argv);
665 * This is called once the connection has been negotiated. It is used
666 * for rsyncd, remote-shell, and local connections.
668 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
670 struct file_list *flist = NULL;
671 int status = 0, status2 = 0;
672 char *local_name = NULL;
674 cleanup_child_pid = pid;
676 set_nonblocking(f_in);
677 set_nonblocking(f_out);
680 io_set_sock_fds(f_in, f_out);
681 setup_protocol(f_out,f_in);
683 if (protocol_version >= 23 && !read_batch)
684 io_start_multiplex_in();
686 /* We set our stderr file handle to blocking because ssh might have
687 * set it to non-blocking. This can be particularly troublesome if
688 * stderr is a clone of stdout, because ssh would have set our stdout
689 * to non-blocking at the same time (which can easily cause us to lose
690 * output from our print statements). This kluge shouldn't cause ssh
691 * any problems for how we use it. Note also that we delayed setting
692 * this until after the above protocol setup so that we know for sure
693 * that ssh is done twiddling its file descriptors. */
694 set_blocking(STDERR_FILENO);
697 keep_dirlinks = 0; /* Must be disabled on the sender. */
698 io_start_buffering_out();
699 if (!remote_filesfrom_file)
703 if (delete_mode && !delete_excluded)
704 send_exclude_list(f_out);
705 if (remote_filesfrom_file)
709 start_write_batch(f_out);
710 if (!read_batch) /* don't write to pipe */
711 flist = send_file_list(f_out,argc,argv);
714 rprintf(FINFO,"file list sent\n");
716 io_flush(NORMAL_FLUSH);
717 send_files(flist,f_out,f_in);
718 io_flush(FULL_FLUSH);
719 if (protocol_version >= 24) {
720 /* final goodbye message */
725 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
726 io_flush(FULL_FLUSH);
727 wait_process(pid, &status);
730 io_flush(FULL_FLUSH);
731 exit_cleanup(status);
738 send_exclude_list(f_out);
740 if (filesfrom_fd >= 0) {
741 io_set_filesfrom_fds(filesfrom_fd, f_out);
746 start_write_batch(f_in);
747 flist = recv_file_list(f_in);
748 if (!flist || flist->count == 0) {
749 rprintf(FINFO, "client: nothing to do: "
750 "perhaps you need to specify some filenames or "
751 "the --recursive option?\n");
755 local_name = get_local_name(flist,argv[0]);
757 status2 = do_recv(f_in,f_out,flist,local_name);
761 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
762 io_flush(FULL_FLUSH);
763 wait_process(pid, &status);
766 return MAX(status, status2);
769 static int copy_argv (char *argv[])
773 for (i = 0; argv[i]; i++) {
774 if (!(argv[i] = strdup(argv[i]))) {
775 rprintf (FERROR, "out of memory at %s(%d)\n",
786 * Start a client for either type of remote connection. Work out
787 * whether the arguments request a remote shell or rsyncd connection,
788 * and call the appropriate connection function, then run_client.
790 * Calls either start_socket_client (for sockets) or do_cmd and
791 * client_run (for ssh).
793 static int start_client(int argc, char *argv[])
796 char *shell_machine = NULL;
797 char *shell_path = NULL;
798 char *shell_user = NULL;
804 /* Don't clobber argv[] so that ps(1) can still show the right
806 if ((rc = copy_argv(argv)))
809 /* rsync:// always uses rsync server over direct socket connection */
810 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
814 host = argv[0] + strlen(URL_PREFIX);
815 p = strchr(host,'/');
821 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
827 p = strchr(host, ':');
829 rsync_port = atoi(p+1);
832 return start_socket_client(host, path, argc-1, argv+1);
835 if (!read_batch) { /* for read_batch, NO source is specified */
836 p = find_colon(argv[0]);
837 if (p) { /* source is remote */
838 if (remote_filesfrom_file
839 && remote_filesfrom_file != files_from + 1
840 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
842 "--files-from hostname is not the same as the transfer hostname\n");
843 exit_cleanup(RERR_SYNTAX);
845 if (p[1] == ':') { /* double colon */
848 return start_socket_client(argv[0], p+2,
855 if (argc < 1) { /* destination required */
857 exit_cleanup(RERR_SYNTAX);
862 shell_machine = argv[0];
865 } else { /* source is local */
868 /* rsync:// destination uses rsync server over direct socket */
869 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
872 host = argv[argc-1] + strlen(URL_PREFIX);
873 p = strchr(host,'/');
879 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
885 p = strchr(host, ':');
887 rsync_port = atoi(p+1);
890 return start_socket_client(host, path, argc-1, argv);
893 p = find_colon(argv[argc-1]); /* look in dest arg */
894 if (p && remote_filesfrom_file
895 && remote_filesfrom_file != files_from + 1
896 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
898 "--files-from hostname is not the same as the transfer hostname\n");
899 exit_cleanup(RERR_SYNTAX);
901 if (!p) { /* no colon found, so src & dest are local */
903 if (remote_filesfrom_file) {
905 "--files-from cannot be remote when the transfer is local\n");
906 exit_cleanup(RERR_SYNTAX);
908 } else if (p[1] == ':') { /* double colon */
911 return start_socket_client(argv[argc-1], p+2,
920 exit_cleanup(RERR_SYNTAX);
924 shell_machine = NULL;
925 shell_path = argv[argc-1];
928 shell_machine = argv[argc-1];
933 } else { /* read_batch */
935 shell_path = argv[argc-1];
936 if (find_colon(shell_path)) {
937 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
938 exit_cleanup(RERR_SYNTAX);
943 p = strrchr(shell_machine,'@');
946 shell_user = shell_machine;
952 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
953 shell_cmd?shell_cmd:"",
954 shell_machine?shell_machine:"",
955 shell_user?shell_user:"",
956 shell_path?shell_path:"");
959 /* for remote source, only single dest arg can remain ... */
960 if (!am_sender && argc > 1) {
962 exit_cleanup(RERR_SYNTAX);
965 /* ... or no dest at all */
966 if (!am_sender && argc == 0)
969 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
972 /* if we're running an rsync server on the remote host over a
973 * remote shell command, we need to do the RSYNCD protocol first */
974 if (daemon_over_rsh) {
976 tmpret = start_inband_exchange(shell_user, shell_path,
982 ret = client_run(f_in, f_out, pid, argc, argv);
991 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
993 exit_cleanup(RERR_SIGNAL);
996 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
998 if (log_got_error) _exit(RERR_PARTIAL);
1002 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1007 /* An empty waitpid() loop was put here by Tridge and we could never
1008 * get him to explain why he put it in, so rather than taking it
1009 * out we're instead saving the child exit statuses for later use.
1010 * The waitpid() loop presumably eliminates all possibility of leaving
1011 * zombie children, maybe that's why he did it.
1013 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1014 /* save the child's exit status */
1015 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1016 if (pid_stat_table[cnt].pid == 0) {
1017 pid_stat_table[cnt].pid = pid;
1018 pid_stat_table[cnt].status = status;
1028 * This routine catches signals and tries to send them to gdb.
1030 * Because it's called from inside a signal handler it ought not to
1031 * use too many library routines.
1033 * @todo Perhaps use "screen -X" instead/as well, to help people
1034 * debugging without easy access to X. Perhaps use an environment
1035 * variable, or just call a script?
1037 * @todo The /proc/ magic probably only works on Linux (and
1038 * Solaris?) Can we be more portable?
1040 #ifdef MAINTAINER_MODE
1041 const char *get_panic_action(void)
1043 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1048 return "xterm -display :0 -T Panic -n Panic "
1049 "-e gdb /proc/%d/exe %d";
1054 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1056 * This signal handler is only installed if we were configured with
1057 * --enable-maintainer-mode. Perhaps it should always be on and we
1058 * should just look at the environment variable, but I'm a bit leery
1059 * of a signal sending us into a busy loop.
1061 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1066 sprintf(cmd_buf, get_panic_action(),
1067 getpid(), getpid());
1069 /* Unless we failed to execute gdb, we allow the process to
1070 * continue. I'm not sure if that's right. */
1071 ret = system(cmd_buf);
1078 int main(int argc,char *argv[])
1081 int orig_argc = argc;
1082 char **orig_argv = argv;
1084 signal(SIGUSR1, sigusr1_handler);
1085 signal(SIGUSR2, sigusr2_handler);
1086 signal(SIGCHLD, sigchld_handler);
1087 #ifdef MAINTAINER_MODE
1088 signal(SIGSEGV, rsync_panic_handler);
1089 signal(SIGFPE, rsync_panic_handler);
1090 signal(SIGABRT, rsync_panic_handler);
1091 signal(SIGBUS, rsync_panic_handler);
1092 #endif /* def MAINTAINER_MODE */
1094 starttime = time(NULL);
1095 am_root = (MY_UID() == 0);
1097 memset(&stats, 0, sizeof(stats));
1101 exit_cleanup(RERR_SYNTAX);
1104 /* we set a 0 umask so that correct file permissions can be
1106 orig_umask = (int)umask(0);
1108 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1109 /* FIXME: We ought to call the same error-handling
1110 * code here, rather than relying on getopt. */
1112 exit_cleanup(RERR_SYNTAX);
1115 signal(SIGINT,SIGNAL_CAST sig_int);
1116 signal(SIGHUP,SIGNAL_CAST sig_int);
1117 signal(SIGTERM,SIGNAL_CAST sig_int);
1119 /* Ignore SIGPIPE; we consistently check error codes and will
1121 signal(SIGPIPE, SIG_IGN);
1123 /* Initialize push_dir here because on some old systems getcwd
1124 * (implemented by forking "pwd" and reading its output) doesn't
1125 * work when there are other child processes. Also, on all systems
1126 * that implement getcwd that way "pwd" can't be found after chroot. */
1131 if (write_batch || read_batch) {
1133 write_batch_shell_file(orig_argc, orig_argv, argc);
1135 if (read_batch && strcmp(batch_name, "-") == 0)
1136 batch_fd = STDIN_FILENO;
1138 batch_fd = do_open(batch_name,
1139 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1140 : O_RDONLY, S_IRUSR | S_IWUSR);
1143 rsyserr(FERROR, errno, "Batch file %s open error",
1145 exit_cleanup(RERR_FILEIO);
1148 read_stream_flags(batch_fd);
1151 if (am_daemon && !am_server)
1152 return daemon_main();
1156 exit_cleanup(RERR_SYNTAX);
1160 verbose = MAX(verbose,1);
1163 set_nonblocking(STDIN_FILENO);
1164 set_nonblocking(STDOUT_FILENO);
1166 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1167 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1170 ret = start_client(argc, argv);
1172 exit_cleanup(RERR_STARTCLIENT);