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 relative_paths;
50 extern int rsync_port;
51 extern int whole_file;
52 extern int read_batch;
53 extern int write_batch;
55 extern int batch_gen_fd;
56 extern int filesfrom_fd;
57 extern pid_t cleanup_child_pid;
58 extern struct stats stats;
59 extern char *filesfrom_host;
60 extern char *rsync_path;
61 extern char *shell_cmd;
62 extern char *batch_name;
65 struct file_list *the_file_list;
67 /* There's probably never more than at most 2 outstanding child processes,
68 * but set it higher, just in case. */
69 #define MAXCHILDPROCS 5
74 } pid_stat_table[MAXCHILDPROCS];
76 static time_t starttime, endtime;
77 static int64 total_read, total_written;
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 handle_stats(int f)
125 endtime = time(NULL);
127 /* Cache two stats because the read/write code can change it. */
128 total_read = stats.total_read;
129 total_written = stats.total_written;
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 */
161 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
163 else if (!am_sender) {
164 /* Read the first two in opposite order because the meaning of
165 * read/write swaps when switching from sender to receiver. */
166 total_written = read_longint(f);
167 total_read = read_longint(f);
168 stats.total_size = read_longint(f);
169 if (protocol_version >= 29) {
170 stats.flist_buildtime = read_longint(f);
171 stats.flist_xfertime = read_longint(f);
173 } else if (write_batch) {
174 /* The --read-batch process is going to be a client
175 * receiver, so we need to give it the stats. */
176 write_longint(batch_fd, total_read);
177 write_longint(batch_fd, total_written);
178 write_longint(batch_fd, stats.total_size);
179 if (protocol_version >= 29) {
180 write_longint(batch_fd, stats.flist_buildtime);
181 write_longint(batch_fd, stats.flist_xfertime);
186 static void output_summary(void)
189 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
190 rprintf(FINFO,"Number of files transferred: %d\n",
191 stats.num_transferred_files);
192 rprintf(FINFO,"Total file size: %.0f bytes\n",
193 (double)stats.total_size);
194 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
195 (double)stats.total_transferred_size);
196 rprintf(FINFO,"Literal data: %.0f bytes\n",
197 (double)stats.literal_data);
198 rprintf(FINFO,"Matched data: %.0f bytes\n",
199 (double)stats.matched_data);
200 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
201 if (stats.flist_buildtime) {
203 "File list generation time: %.3f seconds\n",
204 (double)stats.flist_buildtime / 1000);
206 "File list transfer time: %.3f seconds\n",
207 (double)stats.flist_xfertime / 1000);
209 rprintf(FINFO,"Total bytes sent: %.0f\n",
210 (double)total_written);
211 rprintf(FINFO,"Total bytes received: %.0f\n",
215 if (verbose || do_stats) {
217 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
218 (double)total_written, (double)total_read,
219 (total_written + total_read)/(0.5 + (endtime - starttime)));
220 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
221 (double)stats.total_size,
222 (double)stats.total_size / (total_written+total_read));
231 * If our C library can get malloc statistics, then show them to FINFO
233 static void show_malloc_stats(void)
240 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
241 getpid(), am_server ? "server " : "",
242 am_daemon ? "daemon " : "", who_am_i());
243 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
245 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
247 rprintf(FINFO, " smblks: %10ld\n",
249 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
251 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
253 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
254 (long)mi.arena + mi.hblkhd);
255 rprintf(FINFO, " usmblks: %10ld\n",
257 rprintf(FINFO, " fsmblks: %10ld\n",
259 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
261 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
263 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
265 #endif /* HAVE_MALLINFO */
269 /* Start the remote shell. cmd may be NULL to use the default. */
270 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
271 int *f_in, int *f_out)
274 char *args[MAX_ARGS];
276 char *tok, *dir = NULL;
279 if (!read_batch && !local_server) {
280 char *rsh_env = getenv(RSYNC_RSH_ENV);
289 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
290 /* Comparison leaves rooms for server_options(). */
291 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
292 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
293 exit_cleanup(RERR_SYNTAX);
298 /* check to see if we've already been given '-l user' in
299 * the remote-shell command */
300 for (i = 0; i < argc-1; i++) {
301 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
306 /* remsh (on HPUX) takes the arguments the other way around */
307 args[argc++] = machine;
308 if (user && !(daemon_over_rsh && dash_l_set)) {
313 if (user && !(daemon_over_rsh && dash_l_set)) {
317 args[argc++] = machine;
320 args[argc++] = rsync_path;
322 if (blocking_io < 0) {
324 if ((cp = strrchr(cmd, '/')) != NULL)
328 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
332 server_options(args,&argc);
334 if (argc >= MAX_ARGS - 2) {
335 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
336 exit_cleanup(RERR_SYNTAX);
342 if (!daemon_over_rsh && path && *path)
348 rprintf(FINFO,"cmd=");
349 for (i = 0; i < argc; i++)
350 rprintf(FINFO, "%s ", safe_fname(args[i]));
355 int from_gen_pipe[2];
356 if (fd_pair(from_gen_pipe) < 0) {
357 rsyserr(FERROR, errno, "pipe");
358 exit_cleanup(RERR_IPC);
360 batch_gen_fd = from_gen_pipe[0];
361 *f_out = from_gen_pipe[1];
363 ret = -1; /* no child pid */
364 } else if (local_server) {
365 /* If the user didn't request --[no-]whole-file, force
366 * it on, but only if we're not batch processing. */
367 if (whole_file < 0 && !write_batch)
369 ret = local_child(argc, args, f_in, f_out, child_main);
371 ret = piped_child(args,f_in,f_out);
379 out_of_memory("do_cmd");
380 return 0; /* not reached */
384 static char *get_local_name(struct file_list *flist,char *name)
390 rprintf(FINFO,"get_local_name count=%d %s\n",
391 flist->count, NS(name));
396 if (do_stat(name,&st) == 0) {
397 if (S_ISDIR(st.st_mode)) {
398 if (!push_dir(name)) {
399 rsyserr(FERROR, errno, "push_dir#1 %s failed",
401 exit_cleanup(RERR_FILESELECT);
405 if (flist->count > 1) {
406 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
407 exit_cleanup(RERR_FILESELECT);
412 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
415 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
416 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
417 exit_cleanup(RERR_FILEIO);
420 rprintf(FINFO, "created directory %s\n", safe_fname(name));
427 if (!push_dir(name)) {
428 rsyserr(FERROR, errno, "push_dir#2 %s failed",
430 exit_cleanup(RERR_FILESELECT);
437 /* This is only called by the sender. */
438 static void read_final_goodbye(int f_in, int f_out)
442 if (protocol_version < 29)
445 while ((i = read_int(f_in)) == the_file_list->count
446 && read_shortint(f_in) == ITEM_IS_NEW) {
447 /* Forward the keep-alive (no-op) to the receiver. */
448 write_int(f_out, the_file_list->count);
449 write_shortint(f_out, ITEM_IS_NEW);
454 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
456 exit_cleanup(RERR_PROTOCOL);
461 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
463 struct file_list *flist;
467 rprintf(FINFO, "server_sender starting pid=%ld\n",
471 if (am_daemon && lp_write_only(module_id)) {
472 rprintf(FERROR, "ERROR: module is write only\n");
473 exit_cleanup(RERR_SYNTAX);
476 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
478 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
479 exit_cleanup(RERR_SYNTAX);
483 if (!relative_paths && !push_dir(dir)) {
484 rsyserr(FERROR, errno, "push_dir#3 %s failed",
486 exit_cleanup(RERR_FILESELECT);
491 if (argc == 0 && (recurse || list_only)) {
497 flist = send_file_list(f_out,argc,argv);
498 if (!flist || flist->count == 0) {
501 the_file_list = flist;
503 io_start_buffering_in();
504 io_start_buffering_out();
506 send_files(flist,f_out,f_in);
507 io_flush(FULL_FLUSH);
509 if (protocol_version >= 24)
510 read_final_goodbye(f_in, f_out);
511 io_flush(FULL_FLUSH);
516 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
522 /* The receiving side mustn't obey this, or an existing symlink that
523 * points to an identical file won't be replaced by the referent. */
526 if (preserve_hard_links)
529 if (fd_pair(error_pipe) < 0) {
530 rsyserr(FERROR, errno, "pipe failed in do_recv");
531 exit_cleanup(RERR_IPC);
534 io_flush(NORMAL_FLUSH);
536 if ((pid = do_fork()) == -1) {
537 rsyserr(FERROR, errno, "fork failed in do_recv");
538 exit_cleanup(RERR_IPC);
542 close(error_pipe[0]);
546 /* we can't let two processes write to the socket at one time */
547 close_multiplexing_out();
549 /* set place to send errors */
550 set_msg_fd_out(error_pipe[1]);
552 recv_files(f_in, flist, local_name);
553 io_flush(FULL_FLUSH);
556 send_msg(MSG_DONE, "", 0);
557 io_flush(FULL_FLUSH);
559 /* Handle any keep-alive packets from the post-processing work
560 * that the generator does. */
561 if (protocol_version >= 29) {
562 kluge_around_eof = -1;
564 /* This should only get stopped via a USR2 signal. */
565 while (read_int(f_in) == flist->count
566 && read_shortint(f_in) == ITEM_IS_NEW) {}
568 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
570 exit_cleanup(RERR_PROTOCOL);
573 /* Finally, we go to sleep until our parent kills us with a
574 * USR2 signal. We sleep for a short time, as on some OSes
575 * a signal won't interrupt a sleep! */
581 close_multiplexing_in();
582 if (write_batch && !am_server)
585 close(error_pipe[1]);
589 io_start_buffering_out();
591 set_msg_fd_in(error_pipe[0]);
593 generate_files(f_out, flist, local_name);
596 io_flush(FULL_FLUSH);
597 if (protocol_version >= 24) {
598 /* send a final goodbye message */
599 write_int(f_out, -1);
601 io_flush(FULL_FLUSH);
605 wait_process(pid, &status);
610 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
613 struct file_list *flist;
614 char *local_name = NULL;
616 int save_verbose = verbose;
618 if (filesfrom_fd >= 0) {
619 /* We can't mix messages with files-from data on the socket,
620 * so temporarily turn off verbose messages. */
625 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
626 argc, (long)getpid());
629 if (am_daemon && lp_read_only(module_id)) {
630 rprintf(FERROR,"ERROR: module is read only\n");
631 exit_cleanup(RERR_SYNTAX);
640 if (!am_daemon && !push_dir(dir)) {
641 rsyserr(FERROR, errno, "push_dir#4 %s failed",
643 exit_cleanup(RERR_FILESELECT);
647 io_start_buffering_in();
648 recv_filter_list(f_in);
650 if (filesfrom_fd >= 0) {
651 /* We need to send the files-from names to the sender at the
652 * same time that we receive the file-list from them, so we
653 * need the IO routines to automatically write out the names
654 * onto our f_out socket as we read the file-list. This
655 * avoids both deadlock and extra delays/buffers. */
656 io_set_filesfrom_fds(filesfrom_fd, f_out);
660 flist = recv_file_list(f_in);
661 verbose = save_verbose;
663 rprintf(FERROR,"server_recv: recv_file_list error\n");
664 exit_cleanup(RERR_FILESELECT);
666 the_file_list = flist;
669 local_name = get_local_name(flist,argv[0]);
671 status = do_recv(f_in,f_out,flist,local_name);
672 exit_cleanup(status);
676 int child_main(int argc, char *argv[])
678 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
683 void start_server(int f_in, int f_out, int argc, char *argv[])
685 set_nonblocking(f_in);
686 set_nonblocking(f_out);
688 io_set_sock_fds(f_in, f_out);
689 setup_protocol(f_out, f_in);
691 if (protocol_version >= 23)
692 io_start_multiplex_out();
695 keep_dirlinks = 0; /* Must be disabled on the sender. */
696 if (need_messages_from_generator)
697 io_start_multiplex_in();
699 recv_filter_list(f_in);
700 do_server_sender(f_in, f_out, argc, argv);
702 do_server_recv(f_in, f_out, argc, argv);
709 * This is called once the connection has been negotiated. It is used
710 * for rsyncd, remote-shell, and local connections.
712 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
714 struct file_list *flist = NULL;
715 int status = 0, status2 = 0;
716 char *local_name = NULL;
718 cleanup_child_pid = pid;
720 set_nonblocking(f_in);
721 set_nonblocking(f_out);
724 io_set_sock_fds(f_in, f_out);
725 setup_protocol(f_out,f_in);
727 if (protocol_version >= 23 && !read_batch)
728 io_start_multiplex_in();
730 /* We set our stderr file handle to blocking because ssh might have
731 * set it to non-blocking. This can be particularly troublesome if
732 * stderr is a clone of stdout, because ssh would have set our stdout
733 * to non-blocking at the same time (which can easily cause us to lose
734 * output from our print statements). This kluge shouldn't cause ssh
735 * any problems for how we use it. Note also that we delayed setting
736 * this until after the above protocol setup so that we know for sure
737 * that ssh is done twiddling its file descriptors. */
738 set_blocking(STDERR_FILENO);
741 keep_dirlinks = 0; /* Must be disabled on the sender. */
742 io_start_buffering_out();
745 send_filter_list(f_out);
749 if (write_batch && !am_server)
750 start_write_batch(f_out);
751 flist = send_file_list(f_out, argc, argv);
754 rprintf(FINFO,"file list sent\n");
755 the_file_list = flist;
757 io_flush(NORMAL_FLUSH);
758 send_files(flist,f_out,f_in);
759 io_flush(FULL_FLUSH);
761 if (protocol_version >= 24)
762 read_final_goodbye(f_in, f_out);
765 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
766 io_flush(FULL_FLUSH);
767 wait_process(pid, &status);
770 io_flush(FULL_FLUSH);
771 exit_cleanup(status);
774 if (need_messages_from_generator && !read_batch)
775 io_start_multiplex_out();
780 send_filter_list(read_batch ? -1 : f_out);
782 if (filesfrom_fd >= 0) {
783 io_set_filesfrom_fds(filesfrom_fd, f_out);
787 if (write_batch && !am_server)
788 start_write_batch(f_in);
789 flist = recv_file_list(f_in);
790 the_file_list = flist;
792 if (flist && flist->count > 0) {
793 local_name = get_local_name(flist, argv[0]);
795 status2 = do_recv(f_in, f_out, flist, local_name);
803 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
804 io_flush(FULL_FLUSH);
805 wait_process(pid, &status);
808 return MAX(status, status2);
811 static int copy_argv (char *argv[])
815 for (i = 0; argv[i]; i++) {
816 if (!(argv[i] = strdup(argv[i]))) {
817 rprintf (FERROR, "out of memory at %s(%d)\n",
828 * Start a client for either type of remote connection. Work out
829 * whether the arguments request a remote shell or rsyncd connection,
830 * and call the appropriate connection function, then run_client.
832 * Calls either start_socket_client (for sockets) or do_cmd and
833 * client_run (for ssh).
835 static int start_client(int argc, char *argv[])
838 char *shell_machine = NULL;
839 char *shell_path = NULL;
840 char *shell_user = NULL;
846 /* Don't clobber argv[] so that ps(1) can still show the right
848 if ((rc = copy_argv(argv)))
851 if (!read_batch) { /* for read_batch, NO source is specified */
853 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
854 if (shell_path) { /* source is remote */
857 if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
859 "The source and destination cannot both be remote.\n");
860 exit_cleanup(RERR_SYNTAX);
863 if (filesfrom_host && *filesfrom_host
864 && strcmp(filesfrom_host, shell_machine) != 0) {
866 "--files-from hostname is not the same as the transfer hostname\n");
867 exit_cleanup(RERR_SYNTAX);
871 return start_socket_client(shell_machine,
879 } else { /* source is local, check dest arg */
882 if (argc < 1) { /* destination required */
884 exit_cleanup(RERR_SYNTAX);
887 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
888 if (shell_path && filesfrom_host && *filesfrom_host
889 && strcmp(filesfrom_host, shell_machine) != 0) {
891 "--files-from hostname is not the same as the transfer hostname\n");
892 exit_cleanup(RERR_SYNTAX);
894 if (!shell_path) { /* no hostspec found, so src & dest are local */
896 if (filesfrom_host) {
898 "--files-from cannot be remote when the transfer is local\n");
899 exit_cleanup(RERR_SYNTAX);
901 shell_machine = NULL;
902 shell_path = argv[argc];
903 } else if (rsync_port) {
905 return start_socket_client(shell_machine,
912 } else { /* read_batch */
914 shell_path = argv[argc-1];
915 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
916 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
917 exit_cleanup(RERR_SYNTAX);
922 p = strrchr(shell_machine,'@');
925 shell_user = shell_machine;
931 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
932 shell_cmd ? safe_fname(shell_cmd) : "",
933 shell_machine ? safe_fname(shell_machine) : "",
934 shell_user ? safe_fname(shell_user) : "",
935 shell_path ? safe_fname(shell_path) : "");
938 /* for remote source, only single dest arg can remain ... */
939 if (!am_sender && argc > 1) {
941 exit_cleanup(RERR_SYNTAX);
944 /* ... or no dest at all */
945 if (!am_sender && argc == 0)
948 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
951 /* if we're running an rsync server on the remote host over a
952 * remote shell command, we need to do the RSYNCD protocol first */
953 if (daemon_over_rsh) {
955 tmpret = start_inband_exchange(shell_user, shell_path,
961 ret = client_run(f_in, f_out, pid, argc, argv);
970 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
972 exit_cleanup(RERR_SIGNAL);
975 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
985 static RETSIGTYPE sigchld_handler(UNUSED(int val))
990 /* An empty waitpid() loop was put here by Tridge and we could never
991 * get him to explain why he put it in, so rather than taking it
992 * out we're instead saving the child exit statuses for later use.
993 * The waitpid() loop presumably eliminates all possibility of leaving
994 * zombie children, maybe that's why he did it.
996 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
997 /* save the child's exit status */
998 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
999 if (pid_stat_table[cnt].pid == 0) {
1000 pid_stat_table[cnt].pid = pid;
1001 pid_stat_table[cnt].status = status;
1011 * This routine catches signals and tries to send them to gdb.
1013 * Because it's called from inside a signal handler it ought not to
1014 * use too many library routines.
1016 * @todo Perhaps use "screen -X" instead/as well, to help people
1017 * debugging without easy access to X. Perhaps use an environment
1018 * variable, or just call a script?
1020 * @todo The /proc/ magic probably only works on Linux (and
1021 * Solaris?) Can we be more portable?
1023 #ifdef MAINTAINER_MODE
1024 const char *get_panic_action(void)
1026 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1031 return "xterm -display :0 -T Panic -n Panic "
1032 "-e gdb /proc/%d/exe %d";
1037 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1039 * This signal handler is only installed if we were configured with
1040 * --enable-maintainer-mode. Perhaps it should always be on and we
1041 * should just look at the environment variable, but I'm a bit leery
1042 * of a signal sending us into a busy loop.
1044 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1049 sprintf(cmd_buf, get_panic_action(),
1050 getpid(), getpid());
1052 /* Unless we failed to execute gdb, we allow the process to
1053 * continue. I'm not sure if that's right. */
1054 ret = system(cmd_buf);
1061 int main(int argc,char *argv[])
1064 int orig_argc = argc;
1065 char **orig_argv = argv;
1067 signal(SIGUSR1, sigusr1_handler);
1068 signal(SIGUSR2, sigusr2_handler);
1069 signal(SIGCHLD, sigchld_handler);
1070 #ifdef MAINTAINER_MODE
1071 signal(SIGSEGV, rsync_panic_handler);
1072 signal(SIGFPE, rsync_panic_handler);
1073 signal(SIGABRT, rsync_panic_handler);
1074 signal(SIGBUS, rsync_panic_handler);
1075 #endif /* def MAINTAINER_MODE */
1077 starttime = time(NULL);
1078 am_root = (MY_UID() == 0);
1080 memset(&stats, 0, sizeof(stats));
1084 exit_cleanup(RERR_SYNTAX);
1087 /* we set a 0 umask so that correct file permissions can be
1089 orig_umask = (int)umask(0);
1091 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1092 /* FIXME: We ought to call the same error-handling
1093 * code here, rather than relying on getopt. */
1095 exit_cleanup(RERR_SYNTAX);
1098 signal(SIGINT,SIGNAL_CAST sig_int);
1099 signal(SIGHUP,SIGNAL_CAST sig_int);
1100 signal(SIGTERM,SIGNAL_CAST sig_int);
1102 /* Ignore SIGPIPE; we consistently check error codes and will
1104 signal(SIGPIPE, SIG_IGN);
1106 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1107 setlocale(LC_CTYPE, "");
1110 /* Initialize push_dir here because on some old systems getcwd
1111 * (implemented by forking "pwd" and reading its output) doesn't
1112 * work when there are other child processes. Also, on all systems
1113 * that implement getcwd that way "pwd" can't be found after chroot. */
1118 if ((write_batch || read_batch) && !am_server) {
1120 write_batch_shell_file(orig_argc, orig_argv, argc);
1122 if (read_batch && strcmp(batch_name, "-") == 0)
1123 batch_fd = STDIN_FILENO;
1125 batch_fd = do_open(batch_name,
1126 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1127 : O_RDONLY, S_IRUSR | S_IWUSR);
1130 rsyserr(FERROR, errno, "Batch file %s open error",
1131 full_fname(batch_name));
1132 exit_cleanup(RERR_FILEIO);
1135 read_stream_flags(batch_fd);
1137 if (write_batch < 0)
1140 if (am_daemon && !am_server)
1141 return daemon_main();
1145 exit_cleanup(RERR_SYNTAX);
1149 set_nonblocking(STDIN_FILENO);
1150 set_nonblocking(STDOUT_FILENO);
1152 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1153 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1156 ret = start_client(argc, argv);
1158 exit_cleanup(RERR_STARTCLIENT);