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.
23 #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
33 extern int am_generator;
35 extern int blocking_io;
36 extern int remove_sent_files;
37 extern int daemon_over_rsh;
38 extern int need_messages_from_generator;
39 extern int kluge_around_eof;
41 extern int log_got_error;
43 extern int orig_umask;
44 extern int copy_links;
45 extern int keep_dirlinks;
46 extern int preserve_hard_links;
47 extern int protocol_version;
49 extern int fuzzy_basis;
50 extern int relative_paths;
51 extern int rsync_port;
53 extern int make_backups;
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 struct stats stats;
62 extern char *filesfrom_host;
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 struct file_list *the_file_list;
72 /* There's probably never more than at most 2 outstanding child processes,
73 * but set it higher, just in case. */
74 #define MAXCHILDPROCS 5
79 } pid_stat_table[MAXCHILDPROCS];
81 static time_t starttime, endtime;
82 static int64 total_read, total_written;
84 static void show_malloc_stats(void);
86 /****************************************************************************
87 wait for a process to exit, calling io_flush while waiting
88 ****************************************************************************/
89 void wait_process(pid_t pid, int *status)
94 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
99 if (waited_pid == -1 && errno == ECHILD) {
100 /* status of requested child no longer available.
101 * check to see if it was processed by the sigchld_handler.
103 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
104 if (pid == pid_stat_table[cnt].pid) {
105 *status = pid_stat_table[cnt].status;
106 pid_stat_table[cnt].pid = 0;
112 /* TODO: If the child exited on a signal, then log an
113 * appropriate error message. Perhaps we should also accept a
114 * message describing the purpose of the child. Also indicate
115 * this to the caller so that thhey know something went
117 *status = WEXITSTATUS(*status);
120 /* This function gets called from all 3 processes. We want the client side
121 * to actually output the text, but the sender is the only process that has
122 * all the stats we need. So, if we're a client sender, we do the report.
123 * If we're a server sender, we write the stats on the supplied fd. If
124 * we're the client receiver we read the stats from the supplied fd and do
125 * the report. All processes might also generate a set of debug stats, if
126 * the verbose level is high enough (this is the only thing that the
127 * generator process and the server receiver ever do here). */
128 static void handle_stats(int f)
130 endtime = time(NULL);
132 /* Cache two stats because the read/write code can change it. */
133 total_read = stats.total_read;
134 total_written = stats.total_written;
136 if (do_stats && verbose > 1) {
137 /* These come out from every process */
146 log_exit(0, __FILE__, __LINE__);
147 if (f == -1 || !am_sender)
153 write_longint(f, total_read);
154 write_longint(f, total_written);
155 write_longint(f, stats.total_size);
156 if (protocol_version >= 29) {
157 write_longint(f, stats.flist_buildtime);
158 write_longint(f, stats.flist_xfertime);
164 /* this is the client */
166 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
168 else if (!am_sender) {
169 /* Read the first two in opposite order because the meaning of
170 * read/write swaps when switching from sender to receiver. */
171 total_written = read_longint(f);
172 total_read = read_longint(f);
173 stats.total_size = read_longint(f);
174 if (protocol_version >= 29) {
175 stats.flist_buildtime = read_longint(f);
176 stats.flist_xfertime = read_longint(f);
178 } else if (write_batch && !am_server) {
179 /* The --read-batch process is going to be a client
180 * receiver, so we need to give it the stats. */
181 write_longint(batch_fd, total_read);
182 write_longint(batch_fd, total_written);
183 write_longint(batch_fd, stats.total_size);
184 if (protocol_version >= 29) {
185 write_longint(batch_fd, stats.flist_buildtime);
186 write_longint(batch_fd, stats.flist_xfertime);
191 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
192 rprintf(FINFO,"Number of files transferred: %d\n",
193 stats.num_transferred_files);
194 rprintf(FINFO,"Total file size: %.0f bytes\n",
195 (double)stats.total_size);
196 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
197 (double)stats.total_transferred_size);
198 rprintf(FINFO,"Literal data: %.0f bytes\n",
199 (double)stats.literal_data);
200 rprintf(FINFO,"Matched data: %.0f bytes\n",
201 (double)stats.matched_data);
202 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
203 if (stats.flist_buildtime) {
205 "File list generation time: %.3f seconds\n",
206 (double)stats.flist_buildtime / 1000);
208 "File list transfer time: %.3f seconds\n",
209 (double)stats.flist_xfertime / 1000);
211 rprintf(FINFO,"Total bytes sent: %.0f\n",
212 (double)total_written);
213 rprintf(FINFO,"Total bytes received: %.0f\n",
221 static void output_summary(void)
223 if (verbose || do_stats) {
225 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
226 (double)total_written, (double)total_read,
227 (total_written + total_read)/(0.5 + (endtime - starttime)));
228 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
229 (double)stats.total_size,
230 (double)stats.total_size / (total_written+total_read));
239 * If our C library can get malloc statistics, then show them to FINFO
241 static void show_malloc_stats(void)
248 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
249 getpid(), am_server ? "server " : "",
250 am_daemon ? "daemon " : "", who_am_i());
251 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
253 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
255 rprintf(FINFO, " smblks: %10ld\n",
257 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
259 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
261 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
262 (long)mi.arena + mi.hblkhd);
263 rprintf(FINFO, " usmblks: %10ld\n",
265 rprintf(FINFO, " fsmblks: %10ld\n",
267 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
269 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
271 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
273 #endif /* HAVE_MALLINFO */
277 /* Start the remote shell. cmd may be NULL to use the default. */
278 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
279 int *f_in, int *f_out)
282 char *args[MAX_ARGS];
284 char *tok, *dir = NULL;
287 if (!read_batch && !local_server) {
288 char *rsh_env = getenv(RSYNC_RSH_ENV);
297 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
298 /* Comparison leaves rooms for server_options(). */
299 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
300 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
301 exit_cleanup(RERR_SYNTAX);
306 /* check to see if we've already been given '-l user' in
307 * the remote-shell command */
308 for (i = 0; i < argc-1; i++) {
309 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
314 /* remsh (on HPUX) takes the arguments the other way around */
315 args[argc++] = machine;
316 if (user && !(daemon_over_rsh && dash_l_set)) {
321 if (user && !(daemon_over_rsh && dash_l_set)) {
325 args[argc++] = machine;
328 args[argc++] = rsync_path;
330 if (blocking_io < 0) {
332 if ((cp = strrchr(cmd, '/')) != NULL)
336 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
340 server_options(args,&argc);
342 if (argc >= MAX_ARGS - 2) {
343 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
344 exit_cleanup(RERR_SYNTAX);
350 if (!daemon_over_rsh && path && *path)
356 rprintf(FINFO,"cmd=");
357 for (i = 0; i < argc; i++)
358 rprintf(FINFO, "%s ", safe_fname(args[i]));
363 int from_gen_pipe[2];
364 if (fd_pair(from_gen_pipe) < 0) {
365 rsyserr(FERROR, errno, "pipe");
366 exit_cleanup(RERR_IPC);
368 batch_gen_fd = from_gen_pipe[0];
369 *f_out = from_gen_pipe[1];
371 ret = -1; /* no child pid */
372 } else if (local_server) {
373 /* If the user didn't request --[no-]whole-file, force
374 * it on, but only if we're not batch processing. */
375 if (whole_file < 0 && !write_batch)
377 ret = local_child(argc, args, f_in, f_out, child_main);
379 ret = piped_child(args,f_in,f_out);
387 out_of_memory("do_cmd");
388 return 0; /* not reached */
392 static char *get_local_name(struct file_list *flist,char *name)
398 rprintf(FINFO,"get_local_name count=%d %s\n",
399 flist->count, NS(name));
404 if (do_stat(name,&st) == 0) {
405 if (S_ISDIR(st.st_mode)) {
406 if (!push_dir(name)) {
407 rsyserr(FERROR, errno, "push_dir#1 %s failed",
409 exit_cleanup(RERR_FILESELECT);
413 if (flist->count > 1) {
414 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
415 exit_cleanup(RERR_FILESELECT);
420 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
423 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
424 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
425 exit_cleanup(RERR_FILEIO);
428 rprintf(FINFO, "created directory %s\n", safe_fname(name));
435 if (!push_dir(name)) {
436 rsyserr(FERROR, errno, "push_dir#2 %s failed",
438 exit_cleanup(RERR_FILESELECT);
445 /* This is only called by the sender. */
446 static void read_final_goodbye(int f_in, int f_out)
450 if (protocol_version < 29)
453 while ((i = read_int(f_in)) == the_file_list->count
454 && read_shortint(f_in) == ITEM_IS_NEW) {
455 /* Forward the keep-alive (no-op) to the receiver. */
456 write_int(f_out, the_file_list->count);
457 write_shortint(f_out, ITEM_IS_NEW);
462 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
464 exit_cleanup(RERR_PROTOCOL);
469 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
472 struct file_list *flist;
476 rprintf(FINFO, "server_sender starting pid=%ld\n",
480 if (am_daemon && lp_write_only(module_id)) {
481 rprintf(FERROR, "ERROR: module is write only\n");
482 exit_cleanup(RERR_SYNTAX);
485 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
487 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
488 exit_cleanup(RERR_SYNTAX);
492 if (!relative_paths && !push_dir(dir)) {
493 rsyserr(FERROR, errno, "push_dir#3 %s failed",
495 exit_cleanup(RERR_FILESELECT);
500 if (strcmp(dir,".")) {
502 if (strcmp(dir,"/") == 0)
504 for (i = 0; i < argc; i++)
508 if (argc == 0 && (recurse || list_only)) {
514 flist = send_file_list(f_out,argc,argv);
515 if (!flist || flist->count == 0) {
518 the_file_list = flist;
520 io_start_buffering_in();
521 io_start_buffering_out();
523 send_files(flist,f_out,f_in);
524 io_flush(FULL_FLUSH);
526 if (protocol_version >= 24)
527 read_final_goodbye(f_in, f_out);
528 io_flush(FULL_FLUSH);
533 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
539 /* The receiving side mustn't obey this, or an existing symlink that
540 * points to an identical file won't be replaced by the referent. */
543 if (preserve_hard_links)
546 if (fd_pair(error_pipe) < 0) {
547 rsyserr(FERROR, errno, "pipe failed in do_recv");
548 exit_cleanup(RERR_IPC);
551 io_flush(NORMAL_FLUSH);
553 if ((pid = do_fork()) == -1) {
554 rsyserr(FERROR, errno, "fork failed in do_recv");
555 exit_cleanup(RERR_IPC);
559 close(error_pipe[0]);
563 /* we can't let two processes write to the socket at one time */
564 close_multiplexing_out();
566 /* set place to send errors */
567 set_msg_fd_out(error_pipe[1]);
569 recv_files(f_in, flist, local_name);
570 io_flush(FULL_FLUSH);
573 send_msg(MSG_DONE, "", 0);
574 io_flush(FULL_FLUSH);
576 /* Handle any keep-alive packets from the post-processing work
577 * that the generator does. */
578 if (protocol_version >= 29) {
579 kluge_around_eof = -1;
581 /* This should only get stopped via a USR2 signal. */
582 while (read_int(f_in) == flist->count
583 && read_shortint(f_in) == ITEM_IS_NEW) {}
585 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
587 exit_cleanup(RERR_PROTOCOL);
590 /* Finally, we go to sleep until our parent kills us with a
591 * USR2 signal. We sleep for a short time, as on some OSes
592 * a signal won't interrupt a sleep! */
598 close_multiplexing_in();
599 if (write_batch && !am_server)
602 close(error_pipe[1]);
606 io_start_buffering_out();
608 set_msg_fd_in(error_pipe[0]);
610 generate_files(f_out, flist, local_name);
613 io_flush(FULL_FLUSH);
614 if (protocol_version >= 24) {
615 /* send a final goodbye message */
616 write_int(f_out, -1);
618 io_flush(FULL_FLUSH);
622 wait_process(pid, &status);
627 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
630 struct file_list *flist;
631 char *local_name = NULL;
633 int save_verbose = verbose;
635 if (filesfrom_fd >= 0) {
636 /* We can't mix messages with files-from data on the socket,
637 * so temporarily turn off verbose messages. */
642 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
643 argc, (long)getpid());
646 if (am_daemon && lp_read_only(module_id)) {
647 rprintf(FERROR,"ERROR: module is read only\n");
648 exit_cleanup(RERR_SYNTAX);
657 if (!am_daemon && !push_dir(dir)) {
658 rsyserr(FERROR, errno, "push_dir#4 %s failed",
660 exit_cleanup(RERR_FILESELECT);
664 io_start_buffering_in();
665 recv_filter_list(f_in);
667 if (filesfrom_fd >= 0) {
668 /* We need to send the files-from names to the sender at the
669 * same time that we receive the file-list from them, so we
670 * need the IO routines to automatically write out the names
671 * onto our f_out socket as we read the file-list. This
672 * avoids both deadlock and extra delays/buffers. */
673 io_set_filesfrom_fds(filesfrom_fd, f_out);
677 flist = recv_file_list(f_in);
678 verbose = save_verbose;
680 rprintf(FERROR,"server_recv: recv_file_list error\n");
681 exit_cleanup(RERR_FILESELECT);
683 the_file_list = flist;
686 if (strcmp(dir,".")) {
687 argv[0] += strlen(dir);
688 if (argv[0][0] == '/')
691 local_name = get_local_name(flist,argv[0]);
694 status = do_recv(f_in,f_out,flist,local_name);
695 exit_cleanup(status);
699 int child_main(int argc, char *argv[])
701 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
706 void start_server(int f_in, int f_out, int argc, char *argv[])
708 set_nonblocking(f_in);
709 set_nonblocking(f_out);
711 io_set_sock_fds(f_in, f_out);
712 setup_protocol(f_out, f_in);
714 if (protocol_version >= 23)
715 io_start_multiplex_out();
718 keep_dirlinks = 0; /* Must be disabled on the sender. */
719 if (need_messages_from_generator)
720 io_start_multiplex_in();
722 recv_filter_list(f_in);
723 do_server_sender(f_in, f_out, argc, argv);
725 do_server_recv(f_in, f_out, argc, argv);
732 * This is called once the connection has been negotiated. It is used
733 * for rsyncd, remote-shell, and local connections.
735 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
737 struct file_list *flist = NULL;
738 int status = 0, status2 = 0;
739 char *local_name = NULL;
741 cleanup_child_pid = pid;
743 set_nonblocking(f_in);
744 set_nonblocking(f_out);
747 io_set_sock_fds(f_in, f_out);
748 setup_protocol(f_out,f_in);
750 if (protocol_version >= 23 && !read_batch)
751 io_start_multiplex_in();
753 /* We set our stderr file handle to blocking because ssh might have
754 * set it to non-blocking. This can be particularly troublesome if
755 * stderr is a clone of stdout, because ssh would have set our stdout
756 * to non-blocking at the same time (which can easily cause us to lose
757 * output from our print statements). This kluge shouldn't cause ssh
758 * any problems for how we use it. Note also that we delayed setting
759 * this until after the above protocol setup so that we know for sure
760 * that ssh is done twiddling its file descriptors. */
761 set_blocking(STDERR_FILENO);
764 keep_dirlinks = 0; /* Must be disabled on the sender. */
765 io_start_buffering_out();
768 send_filter_list(f_out);
772 if (write_batch && !am_server)
773 start_write_batch(f_out);
774 flist = send_file_list(f_out, argc, argv);
777 rprintf(FINFO,"file list sent\n");
778 the_file_list = flist;
780 io_flush(NORMAL_FLUSH);
781 send_files(flist,f_out,f_in);
782 io_flush(FULL_FLUSH);
784 if (protocol_version >= 24)
785 read_final_goodbye(f_in, f_out);
788 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
789 io_flush(FULL_FLUSH);
790 wait_process(pid, &status);
793 io_flush(FULL_FLUSH);
794 exit_cleanup(status);
797 if (need_messages_from_generator && !read_batch)
798 io_start_multiplex_out();
803 send_filter_list(read_batch ? -1 : f_out);
805 if (filesfrom_fd >= 0) {
806 io_set_filesfrom_fds(filesfrom_fd, f_out);
810 if (write_batch && !am_server)
811 start_write_batch(f_in);
812 flist = recv_file_list(f_in);
813 the_file_list = flist;
815 if (flist && flist->count > 0) {
816 local_name = get_local_name(flist, argv[0]);
818 status2 = do_recv(f_in, f_out, flist, local_name);
826 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
827 io_flush(FULL_FLUSH);
828 wait_process(pid, &status);
831 return MAX(status, status2);
834 static int copy_argv (char *argv[])
838 for (i = 0; argv[i]; i++) {
839 if (!(argv[i] = strdup(argv[i]))) {
840 rprintf (FERROR, "out of memory at %s(%d)\n",
851 * Start a client for either type of remote connection. Work out
852 * whether the arguments request a remote shell or rsyncd connection,
853 * and call the appropriate connection function, then run_client.
855 * Calls either start_socket_client (for sockets) or do_cmd and
856 * client_run (for ssh).
858 static int start_client(int argc, char *argv[])
861 char *shell_machine = NULL;
862 char *shell_path = NULL;
863 char *shell_user = NULL;
869 /* Don't clobber argv[] so that ps(1) can still show the right
871 if ((rc = copy_argv(argv)))
874 if (!read_batch) { /* for read_batch, NO source is specified */
876 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
877 if (shell_path) { /* source is remote */
879 if (filesfrom_host && *filesfrom_host
880 && strcmp(filesfrom_host, shell_machine) != 0) {
882 "--files-from hostname is not the same as the transfer hostname\n");
883 exit_cleanup(RERR_SYNTAX);
887 return start_socket_client(shell_machine,
895 } else { /* source is local, check dest arg */
898 if (argc < 1) { /* destination required */
900 exit_cleanup(RERR_SYNTAX);
903 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
904 if (shell_path && filesfrom_host && *filesfrom_host
905 && strcmp(filesfrom_host, shell_machine) != 0) {
907 "--files-from hostname is not the same as the transfer hostname\n");
908 exit_cleanup(RERR_SYNTAX);
910 if (!shell_path) { /* no hostspec found, so src & dest are local */
912 if (filesfrom_host) {
914 "--files-from cannot be remote when the transfer is local\n");
915 exit_cleanup(RERR_SYNTAX);
917 shell_machine = NULL;
918 shell_path = argv[argc];
919 } else if (rsync_port) {
921 return start_socket_client(shell_machine,
928 } else { /* read_batch */
930 shell_path = argv[argc-1];
931 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
932 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
933 exit_cleanup(RERR_SYNTAX);
938 p = strrchr(shell_machine,'@');
941 shell_user = shell_machine;
947 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
948 shell_cmd ? safe_fname(shell_cmd) : "",
949 shell_machine ? safe_fname(shell_machine) : "",
950 shell_user ? safe_fname(shell_user) : "",
951 shell_path ? safe_fname(shell_path) : "");
954 /* for remote source, only single dest arg can remain ... */
955 if (!am_sender && argc > 1) {
957 exit_cleanup(RERR_SYNTAX);
960 /* ... or no dest at all */
961 if (!am_sender && argc == 0)
964 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
967 /* if we're running an rsync server on the remote host over a
968 * remote shell command, we need to do the RSYNCD protocol first */
969 if (daemon_over_rsh) {
971 tmpret = start_inband_exchange(shell_user, shell_path,
977 ret = client_run(f_in, f_out, pid, argc, argv);
986 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
988 exit_cleanup(RERR_SIGNAL);
991 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1001 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1006 /* An empty waitpid() loop was put here by Tridge and we could never
1007 * get him to explain why he put it in, so rather than taking it
1008 * out we're instead saving the child exit statuses for later use.
1009 * The waitpid() loop presumably eliminates all possibility of leaving
1010 * zombie children, maybe that's why he did it.
1012 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1013 /* save the child's exit status */
1014 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1015 if (pid_stat_table[cnt].pid == 0) {
1016 pid_stat_table[cnt].pid = pid;
1017 pid_stat_table[cnt].status = status;
1027 * This routine catches signals and tries to send them to gdb.
1029 * Because it's called from inside a signal handler it ought not to
1030 * use too many library routines.
1032 * @todo Perhaps use "screen -X" instead/as well, to help people
1033 * debugging without easy access to X. Perhaps use an environment
1034 * variable, or just call a script?
1036 * @todo The /proc/ magic probably only works on Linux (and
1037 * Solaris?) Can we be more portable?
1039 #ifdef MAINTAINER_MODE
1040 const char *get_panic_action(void)
1042 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1047 return "xterm -display :0 -T Panic -n Panic "
1048 "-e gdb /proc/%d/exe %d";
1053 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1055 * This signal handler is only installed if we were configured with
1056 * --enable-maintainer-mode. Perhaps it should always be on and we
1057 * should just look at the environment variable, but I'm a bit leery
1058 * of a signal sending us into a busy loop.
1060 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1065 sprintf(cmd_buf, get_panic_action(),
1066 getpid(), getpid());
1068 /* Unless we failed to execute gdb, we allow the process to
1069 * continue. I'm not sure if that's right. */
1070 ret = system(cmd_buf);
1077 int main(int argc,char *argv[])
1080 int orig_argc = argc;
1081 char **orig_argv = argv;
1083 signal(SIGUSR1, sigusr1_handler);
1084 signal(SIGUSR2, sigusr2_handler);
1085 signal(SIGCHLD, sigchld_handler);
1086 #ifdef MAINTAINER_MODE
1087 signal(SIGSEGV, rsync_panic_handler);
1088 signal(SIGFPE, rsync_panic_handler);
1089 signal(SIGABRT, rsync_panic_handler);
1090 signal(SIGBUS, rsync_panic_handler);
1091 #endif /* def MAINTAINER_MODE */
1093 starttime = time(NULL);
1094 am_root = (MY_UID() == 0);
1096 memset(&stats, 0, sizeof(stats));
1100 exit_cleanup(RERR_SYNTAX);
1103 /* we set a 0 umask so that correct file permissions can be
1105 orig_umask = (int)umask(0);
1107 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1108 /* FIXME: We ought to call the same error-handling
1109 * code here, rather than relying on getopt. */
1111 exit_cleanup(RERR_SYNTAX);
1114 signal(SIGINT,SIGNAL_CAST sig_int);
1115 signal(SIGHUP,SIGNAL_CAST sig_int);
1116 signal(SIGTERM,SIGNAL_CAST sig_int);
1118 /* Ignore SIGPIPE; we consistently check error codes and will
1120 signal(SIGPIPE, SIG_IGN);
1122 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1123 setlocale(LC_CTYPE, "");
1126 /* Initialize push_dir here because on some old systems getcwd
1127 * (implemented by forking "pwd" and reading its output) doesn't
1128 * work when there are other child processes. Also, on all systems
1129 * that implement getcwd that way "pwd" can't be found after chroot. */
1134 if ((write_batch || read_batch) && !am_server) {
1136 write_batch_shell_file(orig_argc, orig_argv, argc);
1138 if (read_batch && strcmp(batch_name, "-") == 0)
1139 batch_fd = STDIN_FILENO;
1141 batch_fd = do_open(batch_name,
1142 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1143 : O_RDONLY, S_IRUSR | S_IWUSR);
1146 rsyserr(FERROR, errno, "Batch file %s open error",
1147 full_fname(batch_name));
1148 exit_cleanup(RERR_FILEIO);
1151 read_stream_flags(batch_fd);
1153 if (write_batch < 0)
1156 if (am_daemon && !am_server)
1157 return daemon_main();
1161 exit_cleanup(RERR_SYNTAX);
1165 set_nonblocking(STDIN_FILENO);
1166 set_nonblocking(STDOUT_FILENO);
1168 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1169 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1172 ret = start_client(argc, argv);
1174 exit_cleanup(RERR_STARTCLIENT);