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 *partial_dir;
63 extern char *basis_dir[];
64 extern char *rsync_path;
65 extern char *shell_cmd;
66 extern char *batch_name;
69 /* there's probably never more than at most 2 outstanding child processes,
70 * but set it higher just in case.
72 #define MAXCHILDPROCS 5
77 } pid_stat_table[MAXCHILDPROCS];
79 static void show_malloc_stats(void);
81 /****************************************************************************
82 wait for a process to exit, calling io_flush while waiting
83 ****************************************************************************/
84 void wait_process(pid_t pid, int *status)
89 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
94 if (waited_pid == -1 && errno == ECHILD) {
95 /* status of requested child no longer available.
96 * check to see if it was processed by the sigchld_handler.
98 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
99 if (pid == pid_stat_table[cnt].pid) {
100 *status = pid_stat_table[cnt].status;
101 pid_stat_table[cnt].pid = 0;
107 /* TODO: If the child exited on a signal, then log an
108 * appropriate error message. Perhaps we should also accept a
109 * message describing the purpose of the child. Also indicate
110 * this to the caller so that thhey know something went
112 *status = WEXITSTATUS(*status);
115 /* This function gets called from all 3 processes. We want the client side
116 * to actually output the text, but the sender is the only process that has
117 * all the stats we need. So, if we're a client sender, we do the report.
118 * If we're a server sender, we write the stats on the supplied fd. If
119 * we're the client receiver we read the stats from the supplied fd and do
120 * the report. All processes might also generate a set of debug stats, if
121 * the verbose level is high enough (this is the only thing that the
122 * generator process and the server receiver ever do here). */
123 static void report(int f)
125 /* Cache two stats because the read/write code can change it. */
126 int64 total_read = stats.total_read;
127 int64 total_written = stats.total_written;
128 time_t t = time(NULL);
130 if (do_stats && verbose > 1) {
131 /* These come out from every process */
140 log_exit(0, __FILE__, __LINE__);
141 if (f == -1 || !am_sender)
147 write_longint(f, total_read);
148 write_longint(f, total_written);
149 write_longint(f, stats.total_size);
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 } else if (write_batch) {
163 /* The --read-batch process is going to be a client
164 * receiver, so we need to give it the stats. */
165 write_longint(batch_fd, total_read);
166 write_longint(batch_fd, total_written);
167 write_longint(batch_fd, stats.total_size);
171 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
172 rprintf(FINFO,"Number of files transferred: %d\n",
173 stats.num_transferred_files);
174 rprintf(FINFO,"Total file size: %.0f bytes\n",
175 (double)stats.total_size);
176 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
177 (double)stats.total_transferred_size);
178 rprintf(FINFO,"Literal data: %.0f bytes\n",
179 (double)stats.literal_data);
180 rprintf(FINFO,"Matched data: %.0f bytes\n",
181 (double)stats.matched_data);
182 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
183 rprintf(FINFO,"Total bytes sent: %.0f\n",
184 (double)total_written);
185 rprintf(FINFO,"Total bytes received: %.0f\n",
189 if (verbose || do_stats) {
191 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
192 (double)total_written, (double)total_read,
193 (total_written + total_read)/(0.5 + (t - starttime)));
194 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
195 (double)stats.total_size,
196 (double)stats.total_size / (total_written+total_read));
205 * If our C library can get malloc statistics, then show them to FINFO
207 static void show_malloc_stats(void)
214 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
216 am_server ? "server " : "",
217 am_daemon ? "daemon " : "",
219 rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena);
220 rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks);
221 rprintf(FINFO, " smblks: %10d\n", mi.smblks);
222 rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks);
223 rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd);
224 rprintf(FINFO, " allmem: %10d (bytes from sbrk + mmap)\n",
225 mi.arena + mi.hblkhd);
226 rprintf(FINFO, " usmblks: %10d\n", mi.usmblks);
227 rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks);
228 rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks);
229 rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks);
230 rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost);
231 #endif /* HAVE_MALLINFO */
235 /* Start the remote shell. cmd may be NULL to use the default. */
236 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
237 int *f_in, int *f_out)
240 char *args[MAX_ARGS];
242 char *tok, *dir = NULL;
245 if (!read_batch && !local_server) {
246 char *rsh_env = getenv(RSYNC_RSH_ENV);
255 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
256 /* Comparison leaves rooms for server_options(). */
257 if (argc >= MAX_ARGS - 100) {
258 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
259 exit_cleanup(RERR_SYNTAX);
264 /* check to see if we've already been given '-l user' in
265 * the remote-shell command */
266 for (i = 0; i < argc-1; i++) {
267 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
272 /* remsh (on HPUX) takes the arguments the other way around */
273 args[argc++] = machine;
274 if (user && !(daemon_over_rsh && dash_l_set)) {
279 if (user && !(daemon_over_rsh && dash_l_set)) {
283 args[argc++] = machine;
286 args[argc++] = rsync_path;
288 if (blocking_io < 0) {
290 if ((cp = strrchr(cmd, '/')) != NULL)
294 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
298 server_options(args,&argc);
300 if (argc >= MAX_ARGS - 2) {
301 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
302 exit_cleanup(RERR_SYNTAX);
308 if (!daemon_over_rsh && path && *path)
314 rprintf(FINFO,"cmd=");
315 for (i = 0; i < argc; i++)
316 rprintf(FINFO,"%s ",args[i]);
321 int from_gen_pipe[2];
322 if (fd_pair(from_gen_pipe) < 0) {
323 rsyserr(FERROR, errno, "pipe");
324 exit_cleanup(RERR_IPC);
326 batch_gen_fd = from_gen_pipe[0];
327 *f_out = from_gen_pipe[1];
329 ret = -1; /* no child pid */
330 } else if (local_server) {
331 /* If the user didn't request --[no-]whole-file, force
332 * it on, but only if we're not batch processing. */
333 if (whole_file < 0 && !write_batch)
335 ret = local_child(argc, args, f_in, f_out, child_main);
337 ret = piped_child(args,f_in,f_out);
345 out_of_memory("do_cmd");
346 return 0; /* not reached */
350 static char *get_local_name(struct file_list *flist,char *name)
356 rprintf(FINFO,"get_local_name count=%d %s\n",
357 flist->count, NS(name));
362 if (do_stat(name,&st) == 0) {
363 if (S_ISDIR(st.st_mode)) {
364 if (!push_dir(name)) {
365 rsyserr(FERROR, errno, "push_dir#1 %s failed",
367 exit_cleanup(RERR_FILESELECT);
371 if (flist->count > 1) {
372 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
373 exit_cleanup(RERR_FILESELECT);
378 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
381 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
382 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
383 exit_cleanup(RERR_FILEIO);
386 rprintf(FINFO, "created directory %s\n", name);
393 if (!push_dir(name)) {
394 rsyserr(FERROR, errno, "push_dir#2 %s failed",
396 exit_cleanup(RERR_FILESELECT);
403 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
406 struct file_list *flist;
410 rprintf(FINFO, "server_sender starting pid=%ld\n",
414 if (am_daemon && lp_write_only(module_id)) {
415 rprintf(FERROR, "ERROR: module is write only\n");
416 exit_cleanup(RERR_SYNTAX);
420 if (!relative_paths && !push_dir(dir)) {
421 rsyserr(FERROR, errno, "push_dir#3 %s failed",
423 exit_cleanup(RERR_FILESELECT);
428 if (strcmp(dir,".")) {
430 if (strcmp(dir,"/") == 0)
432 for (i = 0; i < argc; i++)
436 if (argc == 0 && recurse) {
442 flist = send_file_list(f_out,argc,argv);
443 if (!flist || flist->count == 0) {
447 io_start_buffering_in();
448 io_start_buffering_out();
450 send_files(flist,f_out,f_in);
451 io_flush(FULL_FLUSH);
453 if (protocol_version >= 24) {
454 /* final goodbye message */
457 io_flush(FULL_FLUSH);
462 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
466 int error_pipe[2], name_pipe[2];
467 BOOL need_name_pipe = (basis_dir[0] || partial_dir) && !dry_run;
469 /* The receiving side mustn't obey this, or an existing symlink that
470 * points to an identical file won't be replaced by the referent. */
473 if (preserve_hard_links)
474 init_hard_links(flist);
477 /* I moved this here from recv_files() to prevent a race condition */
478 if (recurse && delete_mode && !local_name && flist->count > 0)
482 if (fd_pair(error_pipe) < 0
483 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
484 rsyserr(FERROR, errno, "pipe failed in do_recv");
485 exit_cleanup(RERR_IPC);
488 io_flush(NORMAL_FLUSH);
490 if ((pid = do_fork()) == -1) {
491 rsyserr(FERROR, errno, "fork failed in do_recv");
492 exit_cleanup(RERR_IPC);
496 close(error_pipe[0]);
497 if (need_name_pipe) {
499 set_blocking(name_pipe[0]);
505 /* we can't let two processes write to the socket at one time */
506 close_multiplexing_out();
508 /* set place to send errors */
509 set_msg_fd_out(error_pipe[1]);
511 recv_files(f_in, flist, local_name, name_pipe[0]);
512 io_flush(FULL_FLUSH);
515 send_msg(MSG_DONE, "", 0);
516 io_flush(FULL_FLUSH);
517 /* finally we go to sleep until our parent kills us
518 * with a USR2 signal. We sleep for a short time as on
519 * some OSes a signal won't interrupt a sleep! */
525 close_multiplexing_in();
529 close(error_pipe[1]);
530 if (need_name_pipe) {
532 set_nonblocking(name_pipe[1]);
538 io_start_buffering_out();
540 set_msg_fd_in(error_pipe[0]);
542 generate_files(f_out, flist, local_name, name_pipe[1]);
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;
565 int save_verbose = verbose;
567 if (filesfrom_fd >= 0) {
568 /* We can't mix messages with files-from data on the socket,
569 * so temporarily turn off verbose messages. */
574 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
575 argc, (long)getpid());
578 if (am_daemon && lp_read_only(module_id)) {
579 rprintf(FERROR,"ERROR: module is read only\n");
580 exit_cleanup(RERR_SYNTAX);
589 if (!am_daemon && !push_dir(dir)) {
590 rsyserr(FERROR, errno, "push_dir#4 %s failed",
592 exit_cleanup(RERR_FILESELECT);
596 io_start_buffering_in();
597 if (delete_mode && !delete_excluded)
598 recv_exclude_list(f_in);
600 if (filesfrom_fd >= 0) {
601 /* We need to send the files-from names to the sender at the
602 * same time that we receive the file-list from them, so we
603 * need the IO routines to automatically write out the names
604 * onto our f_out socket as we read the file-list. This
605 * avoids both deadlock and extra delays/buffers. */
606 io_set_filesfrom_fds(filesfrom_fd, f_out);
610 flist = recv_file_list(f_in);
611 verbose = save_verbose;
613 rprintf(FERROR,"server_recv: recv_file_list error\n");
614 exit_cleanup(RERR_FILESELECT);
618 if (strcmp(dir,".")) {
619 argv[0] += strlen(dir);
620 if (argv[0][0] == '/')
623 local_name = get_local_name(flist,argv[0]);
626 status = do_recv(f_in,f_out,flist,local_name);
627 exit_cleanup(status);
631 int child_main(int argc, char *argv[])
633 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
638 void start_server(int f_in, int f_out, int argc, char *argv[])
640 set_nonblocking(f_in);
641 set_nonblocking(f_out);
643 io_set_sock_fds(f_in, f_out);
644 setup_protocol(f_out, f_in);
646 if (protocol_version >= 23)
647 io_start_multiplex_out();
650 keep_dirlinks = 0; /* Must be disabled on the sender. */
652 recv_exclude_list(f_in);
655 do_server_sender(f_in, f_out, argc, argv);
657 do_server_recv(f_in, f_out, argc, argv);
664 * This is called once the connection has been negotiated. It is used
665 * for rsyncd, remote-shell, and local connections.
667 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
669 struct file_list *flist = NULL;
670 int status = 0, status2 = 0;
671 char *local_name = NULL;
673 cleanup_child_pid = pid;
675 set_nonblocking(f_in);
676 set_nonblocking(f_out);
679 io_set_sock_fds(f_in, f_out);
680 setup_protocol(f_out,f_in);
682 if (protocol_version >= 23 && !read_batch)
683 io_start_multiplex_in();
685 /* We set our stderr file handle to blocking because ssh might have
686 * set it to non-blocking. This can be particularly troublesome if
687 * stderr is a clone of stdout, because ssh would have set our stdout
688 * to non-blocking at the same time (which can easily cause us to lose
689 * output from our print statements). This kluge shouldn't cause ssh
690 * any problems for how we use it. Note also that we delayed setting
691 * this until after the above protocol setup so that we know for sure
692 * that ssh is done twiddling its file descriptors. */
693 set_blocking(STDERR_FILENO);
696 keep_dirlinks = 0; /* Must be disabled on the sender. */
697 io_start_buffering_out();
698 if (!remote_filesfrom_file)
702 if (delete_mode && !delete_excluded)
703 send_exclude_list(f_out);
704 if (remote_filesfrom_file)
708 start_write_batch(f_out);
709 if (!read_batch) /* don't write to pipe */
710 flist = send_file_list(f_out,argc,argv);
713 rprintf(FINFO,"file list sent\n");
715 io_flush(NORMAL_FLUSH);
716 send_files(flist,f_out,f_in);
717 io_flush(FULL_FLUSH);
718 if (protocol_version >= 24) {
719 /* final goodbye message */
724 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
725 io_flush(FULL_FLUSH);
726 wait_process(pid, &status);
729 io_flush(FULL_FLUSH);
730 exit_cleanup(status);
737 send_exclude_list(f_out);
739 if (filesfrom_fd >= 0) {
740 io_set_filesfrom_fds(filesfrom_fd, f_out);
745 start_write_batch(f_in);
746 flist = recv_file_list(f_in);
747 if (!flist || flist->count == 0) {
748 rprintf(FINFO, "client: nothing to do: "
749 "perhaps you need to specify some filenames or "
750 "the --recursive option?\n");
754 local_name = get_local_name(flist,argv[0]);
756 status2 = do_recv(f_in,f_out,flist,local_name);
760 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
761 io_flush(FULL_FLUSH);
762 wait_process(pid, &status);
765 return MAX(status, status2);
768 static int copy_argv (char *argv[])
772 for (i = 0; argv[i]; i++) {
773 if (!(argv[i] = strdup(argv[i]))) {
774 rprintf (FERROR, "out of memory at %s(%d)\n",
785 * Start a client for either type of remote connection. Work out
786 * whether the arguments request a remote shell or rsyncd connection,
787 * and call the appropriate connection function, then run_client.
789 * Calls either start_socket_client (for sockets) or do_cmd and
790 * client_run (for ssh).
792 static int start_client(int argc, char *argv[])
795 char *shell_machine = NULL;
796 char *shell_path = NULL;
797 char *shell_user = NULL;
803 /* Don't clobber argv[] so that ps(1) can still show the right
805 if ((rc = copy_argv(argv)))
808 /* rsync:// always uses rsync server over direct socket connection */
809 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
813 host = argv[0] + strlen(URL_PREFIX);
814 p = strchr(host,'/');
820 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
826 p = strchr(host, ':');
828 rsync_port = atoi(p+1);
831 return start_socket_client(host, path, argc-1, argv+1);
834 if (!read_batch) { /* for read_batch, NO source is specified */
835 p = find_colon(argv[0]);
836 if (p) { /* source is remote */
837 if (remote_filesfrom_file
838 && remote_filesfrom_file != files_from + 1
839 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
841 "--files-from hostname is not the same as the transfer hostname\n");
842 exit_cleanup(RERR_SYNTAX);
844 if (p[1] == ':') { /* double colon */
847 return start_socket_client(argv[0], p+2,
854 if (argc < 1) { /* destination required */
856 exit_cleanup(RERR_SYNTAX);
861 shell_machine = argv[0];
864 } else { /* source is local */
867 /* rsync:// destination uses rsync server over direct socket */
868 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
871 host = argv[argc-1] + strlen(URL_PREFIX);
872 p = strchr(host,'/');
878 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
884 p = strchr(host, ':');
886 rsync_port = atoi(p+1);
889 return start_socket_client(host, path, argc-1, argv);
892 p = find_colon(argv[argc-1]); /* look in dest arg */
893 if (p && remote_filesfrom_file
894 && remote_filesfrom_file != files_from + 1
895 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
897 "--files-from hostname is not the same as the transfer hostname\n");
898 exit_cleanup(RERR_SYNTAX);
900 if (!p) { /* no colon found, so src & dest are local */
902 if (remote_filesfrom_file) {
904 "--files-from cannot be remote when the transfer is local\n");
905 exit_cleanup(RERR_SYNTAX);
907 } else if (p[1] == ':') { /* double colon */
910 return start_socket_client(argv[argc-1], p+2,
919 exit_cleanup(RERR_SYNTAX);
923 shell_machine = NULL;
924 shell_path = argv[argc-1];
927 shell_machine = argv[argc-1];
932 } else { /* read_batch */
934 shell_path = argv[argc-1];
935 if (find_colon(shell_path)) {
936 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
937 exit_cleanup(RERR_SYNTAX);
942 p = strrchr(shell_machine,'@');
945 shell_user = shell_machine;
951 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
952 shell_cmd?shell_cmd:"",
953 shell_machine?shell_machine:"",
954 shell_user?shell_user:"",
955 shell_path?shell_path:"");
958 /* for remote source, only single dest arg can remain ... */
959 if (!am_sender && argc > 1) {
961 exit_cleanup(RERR_SYNTAX);
964 /* ... or no dest at all */
965 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);