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",
236 getpid(), am_server ? "server " : "",
237 am_daemon ? "daemon " : "", who_am_i());
238 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
240 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
242 rprintf(FINFO, " smblks: %10ld\n",
244 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
246 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
248 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
249 (long)mi.arena + mi.hblkhd);
250 rprintf(FINFO, " usmblks: %10ld\n",
252 rprintf(FINFO, " fsmblks: %10ld\n",
254 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
256 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
258 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
260 #endif /* HAVE_MALLINFO */
264 /* Start the remote shell. cmd may be NULL to use the default. */
265 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
266 int *f_in, int *f_out)
269 char *args[MAX_ARGS];
271 char *tok, *dir = NULL;
274 if (!read_batch && !local_server) {
275 char *rsh_env = getenv(RSYNC_RSH_ENV);
284 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
285 /* Comparison leaves rooms for server_options(). */
286 if (argc >= MAX_ARGS - 100) {
287 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
288 exit_cleanup(RERR_SYNTAX);
293 /* check to see if we've already been given '-l user' in
294 * the remote-shell command */
295 for (i = 0; i < argc-1; i++) {
296 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
301 /* remsh (on HPUX) takes the arguments the other way around */
302 args[argc++] = machine;
303 if (user && !(daemon_over_rsh && dash_l_set)) {
308 if (user && !(daemon_over_rsh && dash_l_set)) {
312 args[argc++] = machine;
315 args[argc++] = rsync_path;
317 if (blocking_io < 0) {
319 if ((cp = strrchr(cmd, '/')) != NULL)
323 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
327 server_options(args,&argc);
329 if (argc >= MAX_ARGS - 2) {
330 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
331 exit_cleanup(RERR_SYNTAX);
337 if (!daemon_over_rsh && path && *path)
343 rprintf(FINFO,"cmd=");
344 for (i = 0; i < argc; i++)
345 rprintf(FINFO,"%s ",args[i]);
350 int from_gen_pipe[2];
351 if (fd_pair(from_gen_pipe) < 0) {
352 rsyserr(FERROR, errno, "pipe");
353 exit_cleanup(RERR_IPC);
355 batch_gen_fd = from_gen_pipe[0];
356 *f_out = from_gen_pipe[1];
358 ret = -1; /* no child pid */
359 } else if (local_server) {
360 /* If the user didn't request --[no-]whole-file, force
361 * it on, but only if we're not batch processing. */
362 if (whole_file < 0 && !write_batch)
364 ret = local_child(argc, args, f_in, f_out, child_main);
366 ret = piped_child(args,f_in,f_out);
374 out_of_memory("do_cmd");
375 return 0; /* not reached */
379 static char *get_local_name(struct file_list *flist,char *name)
385 rprintf(FINFO,"get_local_name count=%d %s\n",
386 flist->count, NS(name));
391 if (do_stat(name,&st) == 0) {
392 if (S_ISDIR(st.st_mode)) {
393 if (!push_dir(name)) {
394 rsyserr(FERROR, errno, "push_dir#1 %s failed",
396 exit_cleanup(RERR_FILESELECT);
400 if (flist->count > 1) {
401 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
402 exit_cleanup(RERR_FILESELECT);
407 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
410 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
411 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
412 exit_cleanup(RERR_FILEIO);
415 rprintf(FINFO, "created directory %s\n", name);
422 if (!push_dir(name)) {
423 rsyserr(FERROR, errno, "push_dir#2 %s failed",
425 exit_cleanup(RERR_FILESELECT);
432 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
435 struct file_list *flist;
439 rprintf(FINFO, "server_sender starting pid=%ld\n",
443 if (am_daemon && lp_write_only(module_id)) {
444 rprintf(FERROR, "ERROR: module is write only\n");
445 exit_cleanup(RERR_SYNTAX);
449 if (!relative_paths && !push_dir(dir)) {
450 rsyserr(FERROR, errno, "push_dir#3 %s failed",
452 exit_cleanup(RERR_FILESELECT);
457 if (strcmp(dir,".")) {
459 if (strcmp(dir,"/") == 0)
461 for (i = 0; i < argc; i++)
465 if (argc == 0 && (recurse || list_only)) {
471 flist = send_file_list(f_out,argc,argv);
472 if (!flist || flist->count == 0) {
476 io_start_buffering_in();
477 io_start_buffering_out();
479 send_files(flist,f_out,f_in);
480 io_flush(FULL_FLUSH);
482 if (protocol_version >= 24) {
483 /* final goodbye message */
486 io_flush(FULL_FLUSH);
491 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
495 int error_pipe[2], name_pipe[2];
496 BOOL need_name_pipe = (basis_dir[0] || partial_dir) && !dry_run;
498 /* The receiving side mustn't obey this, or an existing symlink that
499 * points to an identical file won't be replaced by the referent. */
502 if (preserve_hard_links)
503 init_hard_links(flist);
506 /* I moved this here from recv_files() to prevent a race condition */
507 if (recurse && !local_name && flist->count > 0)
511 if (fd_pair(error_pipe) < 0
512 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
513 rsyserr(FERROR, errno, "pipe failed in do_recv");
514 exit_cleanup(RERR_IPC);
517 io_flush(NORMAL_FLUSH);
519 if ((pid = do_fork()) == -1) {
520 rsyserr(FERROR, errno, "fork failed in do_recv");
521 exit_cleanup(RERR_IPC);
525 close(error_pipe[0]);
526 if (need_name_pipe) {
528 set_blocking(name_pipe[0]);
534 /* we can't let two processes write to the socket at one time */
535 close_multiplexing_out();
537 /* set place to send errors */
538 set_msg_fd_out(error_pipe[1]);
540 recv_files(f_in, flist, local_name, name_pipe[0]);
541 io_flush(FULL_FLUSH);
544 send_msg(MSG_DONE, "", 0);
545 io_flush(FULL_FLUSH);
546 /* finally we go to sleep until our parent kills us
547 * with a USR2 signal. We sleep for a short time as on
548 * some OSes a signal won't interrupt a sleep! */
554 close_multiplexing_in();
558 close(error_pipe[1]);
559 if (need_name_pipe) {
561 set_nonblocking(name_pipe[1]);
567 io_start_buffering_out();
569 set_msg_fd_in(error_pipe[0]);
571 generate_files(f_out, flist, local_name, name_pipe[1]);
574 io_flush(FULL_FLUSH);
575 if (protocol_version >= 24) {
576 /* send a final goodbye message */
577 write_int(f_out, -1);
579 io_flush(FULL_FLUSH);
583 wait_process(pid, &status);
588 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
591 struct file_list *flist;
592 char *local_name = NULL;
594 int save_verbose = verbose;
596 if (filesfrom_fd >= 0) {
597 /* We can't mix messages with files-from data on the socket,
598 * so temporarily turn off verbose messages. */
603 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
604 argc, (long)getpid());
607 if (am_daemon && lp_read_only(module_id)) {
608 rprintf(FERROR,"ERROR: module is read only\n");
609 exit_cleanup(RERR_SYNTAX);
618 if (!am_daemon && !push_dir(dir)) {
619 rsyserr(FERROR, errno, "push_dir#4 %s failed",
621 exit_cleanup(RERR_FILESELECT);
625 io_start_buffering_in();
626 if (delete_mode && !delete_excluded)
627 recv_filter_list(f_in);
631 if (filesfrom_fd >= 0) {
632 /* We need to send the files-from names to the sender at the
633 * same time that we receive the file-list from them, so we
634 * need the IO routines to automatically write out the names
635 * onto our f_out socket as we read the file-list. This
636 * avoids both deadlock and extra delays/buffers. */
637 io_set_filesfrom_fds(filesfrom_fd, f_out);
641 flist = recv_file_list(f_in);
642 verbose = save_verbose;
644 rprintf(FERROR,"server_recv: recv_file_list error\n");
645 exit_cleanup(RERR_FILESELECT);
649 if (strcmp(dir,".")) {
650 argv[0] += strlen(dir);
651 if (argv[0][0] == '/')
654 local_name = get_local_name(flist,argv[0]);
657 status = do_recv(f_in,f_out,flist,local_name);
658 exit_cleanup(status);
662 int child_main(int argc, char *argv[])
664 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
669 void start_server(int f_in, int f_out, int argc, char *argv[])
671 set_nonblocking(f_in);
672 set_nonblocking(f_out);
674 io_set_sock_fds(f_in, f_out);
675 setup_protocol(f_out, f_in);
677 if (protocol_version >= 23)
678 io_start_multiplex_out();
681 keep_dirlinks = 0; /* Must be disabled on the sender. */
683 recv_filter_list(f_in);
686 do_server_sender(f_in, f_out, argc, argv);
688 do_server_recv(f_in, f_out, argc, argv);
695 * This is called once the connection has been negotiated. It is used
696 * for rsyncd, remote-shell, and local connections.
698 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
700 struct file_list *flist = NULL;
701 int status = 0, status2 = 0;
702 char *local_name = NULL;
704 cleanup_child_pid = pid;
706 set_nonblocking(f_in);
707 set_nonblocking(f_out);
710 io_set_sock_fds(f_in, f_out);
711 setup_protocol(f_out,f_in);
713 if (protocol_version >= 23 && !read_batch)
714 io_start_multiplex_in();
716 /* We set our stderr file handle to blocking because ssh might have
717 * set it to non-blocking. This can be particularly troublesome if
718 * stderr is a clone of stdout, because ssh would have set our stdout
719 * to non-blocking at the same time (which can easily cause us to lose
720 * output from our print statements). This kluge shouldn't cause ssh
721 * any problems for how we use it. Note also that we delayed setting
722 * this until after the above protocol setup so that we know for sure
723 * that ssh is done twiddling its file descriptors. */
724 set_blocking(STDERR_FILENO);
727 keep_dirlinks = 0; /* Must be disabled on the sender. */
728 io_start_buffering_out();
729 if (!remote_filesfrom_file)
733 if (delete_mode && !delete_excluded)
734 send_filter_list(f_out);
735 if (remote_filesfrom_file)
739 start_write_batch(f_out);
740 if (!read_batch) /* don't write to pipe */
741 flist = send_file_list(f_out,argc,argv);
744 rprintf(FINFO,"file list sent\n");
746 io_flush(NORMAL_FLUSH);
747 send_files(flist,f_out,f_in);
748 io_flush(FULL_FLUSH);
749 if (protocol_version >= 24) {
750 /* final goodbye message */
755 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
756 io_flush(FULL_FLUSH);
757 wait_process(pid, &status);
760 io_flush(FULL_FLUSH);
761 exit_cleanup(status);
768 send_filter_list(f_out);
772 if (filesfrom_fd >= 0) {
773 io_set_filesfrom_fds(filesfrom_fd, f_out);
778 start_write_batch(f_in);
779 flist = recv_file_list(f_in);
780 if (!flist || flist->count == 0) {
781 rprintf(FINFO, "client: nothing to do: "
782 "perhaps you need to specify some filenames or "
783 "the --recursive option?\n");
787 local_name = get_local_name(flist,argv[0]);
789 status2 = do_recv(f_in,f_out,flist,local_name);
793 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
794 io_flush(FULL_FLUSH);
795 wait_process(pid, &status);
798 return MAX(status, status2);
801 static int copy_argv (char *argv[])
805 for (i = 0; argv[i]; i++) {
806 if (!(argv[i] = strdup(argv[i]))) {
807 rprintf (FERROR, "out of memory at %s(%d)\n",
818 * Start a client for either type of remote connection. Work out
819 * whether the arguments request a remote shell or rsyncd connection,
820 * and call the appropriate connection function, then run_client.
822 * Calls either start_socket_client (for sockets) or do_cmd and
823 * client_run (for ssh).
825 static int start_client(int argc, char *argv[])
828 char *shell_machine = NULL;
829 char *shell_path = NULL;
830 char *shell_user = NULL;
836 /* Don't clobber argv[] so that ps(1) can still show the right
838 if ((rc = copy_argv(argv)))
841 /* rsync:// always uses rsync server over direct socket connection */
842 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
846 host = argv[0] + strlen(URL_PREFIX);
847 p = strchr(host,'/');
853 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
859 p = strchr(host, ':');
861 rsync_port = atoi(p+1);
864 return start_socket_client(host, path, argc-1, argv+1);
867 if (!read_batch) { /* for read_batch, NO source is specified */
868 p = find_colon(argv[0]);
869 if (p) { /* source is remote */
870 if (remote_filesfrom_file
871 && remote_filesfrom_file != files_from + 1
872 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
874 "--files-from hostname is not the same as the transfer hostname\n");
875 exit_cleanup(RERR_SYNTAX);
877 if (p[1] == ':') { /* double colon */
880 return start_socket_client(argv[0], p+2,
887 if (argc < 1) { /* destination required */
889 exit_cleanup(RERR_SYNTAX);
894 shell_machine = argv[0];
897 } else { /* source is local */
900 /* rsync:// destination uses rsync server over direct socket */
901 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
904 host = argv[argc-1] + strlen(URL_PREFIX);
905 p = strchr(host,'/');
911 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
917 p = strchr(host, ':');
919 rsync_port = atoi(p+1);
922 return start_socket_client(host, path, argc-1, argv);
925 p = find_colon(argv[argc-1]); /* look in dest arg */
926 if (p && remote_filesfrom_file
927 && remote_filesfrom_file != files_from + 1
928 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
930 "--files-from hostname is not the same as the transfer hostname\n");
931 exit_cleanup(RERR_SYNTAX);
933 if (!p) { /* no colon found, so src & dest are local */
935 if (remote_filesfrom_file) {
937 "--files-from cannot be remote when the transfer is local\n");
938 exit_cleanup(RERR_SYNTAX);
940 } else if (p[1] == ':') { /* double colon */
943 return start_socket_client(argv[argc-1], p+2,
952 exit_cleanup(RERR_SYNTAX);
956 shell_machine = NULL;
957 shell_path = argv[argc-1];
960 shell_machine = argv[argc-1];
965 } else { /* read_batch */
967 shell_path = argv[argc-1];
968 if (find_colon(shell_path)) {
969 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
970 exit_cleanup(RERR_SYNTAX);
975 p = strrchr(shell_machine,'@');
978 shell_user = shell_machine;
984 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
985 shell_cmd?shell_cmd:"",
986 shell_machine?shell_machine:"",
987 shell_user?shell_user:"",
988 shell_path?shell_path:"");
991 /* for remote source, only single dest arg can remain ... */
992 if (!am_sender && argc > 1) {
994 exit_cleanup(RERR_SYNTAX);
997 /* ... or no dest at all */
998 if (!am_sender && argc == 0)
1001 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1004 /* if we're running an rsync server on the remote host over a
1005 * remote shell command, we need to do the RSYNCD protocol first */
1006 if (daemon_over_rsh) {
1008 tmpret = start_inband_exchange(shell_user, shell_path,
1014 ret = client_run(f_in, f_out, pid, argc, argv);
1023 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1025 exit_cleanup(RERR_SIGNAL);
1028 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1030 if (log_got_error) _exit(RERR_PARTIAL);
1034 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1039 /* An empty waitpid() loop was put here by Tridge and we could never
1040 * get him to explain why he put it in, so rather than taking it
1041 * out we're instead saving the child exit statuses for later use.
1042 * The waitpid() loop presumably eliminates all possibility of leaving
1043 * zombie children, maybe that's why he did it.
1045 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1046 /* save the child's exit status */
1047 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1048 if (pid_stat_table[cnt].pid == 0) {
1049 pid_stat_table[cnt].pid = pid;
1050 pid_stat_table[cnt].status = status;
1060 * This routine catches signals and tries to send them to gdb.
1062 * Because it's called from inside a signal handler it ought not to
1063 * use too many library routines.
1065 * @todo Perhaps use "screen -X" instead/as well, to help people
1066 * debugging without easy access to X. Perhaps use an environment
1067 * variable, or just call a script?
1069 * @todo The /proc/ magic probably only works on Linux (and
1070 * Solaris?) Can we be more portable?
1072 #ifdef MAINTAINER_MODE
1073 const char *get_panic_action(void)
1075 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1080 return "xterm -display :0 -T Panic -n Panic "
1081 "-e gdb /proc/%d/exe %d";
1086 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1088 * This signal handler is only installed if we were configured with
1089 * --enable-maintainer-mode. Perhaps it should always be on and we
1090 * should just look at the environment variable, but I'm a bit leery
1091 * of a signal sending us into a busy loop.
1093 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1098 sprintf(cmd_buf, get_panic_action(),
1099 getpid(), getpid());
1101 /* Unless we failed to execute gdb, we allow the process to
1102 * continue. I'm not sure if that's right. */
1103 ret = system(cmd_buf);
1110 int main(int argc,char *argv[])
1113 int orig_argc = argc;
1114 char **orig_argv = argv;
1116 signal(SIGUSR1, sigusr1_handler);
1117 signal(SIGUSR2, sigusr2_handler);
1118 signal(SIGCHLD, sigchld_handler);
1119 #ifdef MAINTAINER_MODE
1120 signal(SIGSEGV, rsync_panic_handler);
1121 signal(SIGFPE, rsync_panic_handler);
1122 signal(SIGABRT, rsync_panic_handler);
1123 signal(SIGBUS, rsync_panic_handler);
1124 #endif /* def MAINTAINER_MODE */
1126 starttime = time(NULL);
1127 am_root = (MY_UID() == 0);
1129 memset(&stats, 0, sizeof(stats));
1133 exit_cleanup(RERR_SYNTAX);
1136 /* we set a 0 umask so that correct file permissions can be
1138 orig_umask = (int)umask(0);
1140 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1141 /* FIXME: We ought to call the same error-handling
1142 * code here, rather than relying on getopt. */
1144 exit_cleanup(RERR_SYNTAX);
1147 signal(SIGINT,SIGNAL_CAST sig_int);
1148 signal(SIGHUP,SIGNAL_CAST sig_int);
1149 signal(SIGTERM,SIGNAL_CAST sig_int);
1151 /* Ignore SIGPIPE; we consistently check error codes and will
1153 signal(SIGPIPE, SIG_IGN);
1155 /* Initialize push_dir here because on some old systems getcwd
1156 * (implemented by forking "pwd" and reading its output) doesn't
1157 * work when there are other child processes. Also, on all systems
1158 * that implement getcwd that way "pwd" can't be found after chroot. */
1163 if (write_batch || read_batch) {
1165 write_batch_shell_file(orig_argc, orig_argv, argc);
1167 if (read_batch && strcmp(batch_name, "-") == 0)
1168 batch_fd = STDIN_FILENO;
1170 batch_fd = do_open(batch_name,
1171 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1172 : O_RDONLY, S_IRUSR | S_IWUSR);
1175 rsyserr(FERROR, errno, "Batch file %s open error",
1177 exit_cleanup(RERR_FILEIO);
1180 read_stream_flags(batch_fd);
1183 if (am_daemon && !am_server)
1184 return daemon_main();
1188 exit_cleanup(RERR_SYNTAX);
1192 verbose = MAX(verbose,1);
1195 set_nonblocking(STDIN_FILENO);
1196 set_nonblocking(STDOUT_FILENO);
1198 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1199 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1202 ret = start_client(argc, argv);
1204 exit_cleanup(RERR_STARTCLIENT);