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 static void wait_process(pid_t pid, int *code_ptr)
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) {
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 they know something went wrong. */
113 *code_ptr = RERR_WAITCHILD;
114 else if (!WIFEXITED(status)) {
115 if (WCOREDUMP(status))
116 *code_ptr = RERR_CRASHED;
117 else if (WIFSIGNALED(status))
118 *code_ptr = RERR_TERMINATED;
120 *code_ptr = RERR_WAITCHILD;
122 *code_ptr = WEXITSTATUS(status);
125 /* This function gets called from all 3 processes. We want the client side
126 * to actually output the text, but the sender is the only process that has
127 * all the stats we need. So, if we're a client sender, we do the report.
128 * If we're a server sender, we write the stats on the supplied fd. If
129 * we're the client receiver we read the stats from the supplied fd and do
130 * the report. All processes might also generate a set of debug stats, if
131 * the verbose level is high enough (this is the only thing that the
132 * generator process and the server receiver ever do here). */
133 static void handle_stats(int f)
135 endtime = time(NULL);
137 /* Cache two stats because the read/write code can change it. */
138 total_read = stats.total_read;
139 total_written = stats.total_written;
141 if (do_stats && verbose > 1) {
142 /* These come out from every process */
151 log_exit(0, __FILE__, __LINE__);
152 if (f == -1 || !am_sender)
158 write_longint(f, total_read);
159 write_longint(f, total_written);
160 write_longint(f, stats.total_size);
161 if (protocol_version >= 29) {
162 write_longint(f, stats.flist_buildtime);
163 write_longint(f, stats.flist_xfertime);
169 /* this is the client */
171 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
173 else if (!am_sender) {
174 /* Read the first two in opposite order because the meaning of
175 * read/write swaps when switching from sender to receiver. */
176 total_written = read_longint(f);
177 total_read = read_longint(f);
178 stats.total_size = read_longint(f);
179 if (protocol_version >= 29) {
180 stats.flist_buildtime = read_longint(f);
181 stats.flist_xfertime = read_longint(f);
183 } else if (write_batch) {
184 /* The --read-batch process is going to be a client
185 * receiver, so we need to give it the stats. */
186 write_longint(batch_fd, total_read);
187 write_longint(batch_fd, total_written);
188 write_longint(batch_fd, stats.total_size);
189 if (protocol_version >= 29) {
190 write_longint(batch_fd, stats.flist_buildtime);
191 write_longint(batch_fd, stats.flist_xfertime);
196 static void output_summary(void)
199 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
200 rprintf(FINFO,"Number of files transferred: %d\n",
201 stats.num_transferred_files);
202 rprintf(FINFO,"Total file size: %.0f bytes\n",
203 (double)stats.total_size);
204 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
205 (double)stats.total_transferred_size);
206 rprintf(FINFO,"Literal data: %.0f bytes\n",
207 (double)stats.literal_data);
208 rprintf(FINFO,"Matched data: %.0f bytes\n",
209 (double)stats.matched_data);
210 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
211 if (stats.flist_buildtime) {
213 "File list generation time: %.3f seconds\n",
214 (double)stats.flist_buildtime / 1000);
216 "File list transfer time: %.3f seconds\n",
217 (double)stats.flist_xfertime / 1000);
219 rprintf(FINFO,"Total bytes sent: %.0f\n",
220 (double)total_written);
221 rprintf(FINFO,"Total bytes received: %.0f\n",
225 if (verbose || do_stats) {
227 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
228 (double)total_written, (double)total_read,
229 (total_written + total_read)/(0.5 + (endtime - starttime)));
230 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
231 (double)stats.total_size,
232 (double)stats.total_size / (total_written+total_read));
241 * If our C library can get malloc statistics, then show them to FINFO
243 static void show_malloc_stats(void)
250 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
251 getpid(), am_server ? "server " : "",
252 am_daemon ? "daemon " : "", who_am_i());
253 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
255 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
257 rprintf(FINFO, " smblks: %10ld\n",
259 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
261 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
263 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
264 (long)mi.arena + mi.hblkhd);
265 rprintf(FINFO, " usmblks: %10ld\n",
267 rprintf(FINFO, " fsmblks: %10ld\n",
269 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
271 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
273 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
275 #endif /* HAVE_MALLINFO */
279 /* Start the remote shell. cmd may be NULL to use the default. */
280 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
281 int *f_in, int *f_out)
284 char *args[MAX_ARGS];
286 char *tok, *dir = NULL;
289 if (!read_batch && !local_server) {
290 char *rsh_env = getenv(RSYNC_RSH_ENV);
299 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
300 /* Comparison leaves rooms for server_options(). */
301 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
302 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
303 exit_cleanup(RERR_SYNTAX);
308 /* check to see if we've already been given '-l user' in
309 * the remote-shell command */
310 for (i = 0; i < argc-1; i++) {
311 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
316 /* remsh (on HPUX) takes the arguments the other way around */
317 args[argc++] = machine;
318 if (user && !(daemon_over_rsh && dash_l_set)) {
323 if (user && !(daemon_over_rsh && dash_l_set)) {
327 args[argc++] = machine;
330 args[argc++] = rsync_path;
332 if (blocking_io < 0) {
334 if ((cp = strrchr(cmd, '/')) != NULL)
338 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
342 server_options(args,&argc);
344 if (argc >= MAX_ARGS - 2) {
345 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
346 exit_cleanup(RERR_SYNTAX);
352 if (!daemon_over_rsh && path && *path)
358 rprintf(FINFO,"cmd=");
359 for (i = 0; i < argc; i++)
360 rprintf(FINFO, "%s ", safe_fname(args[i]));
365 int from_gen_pipe[2];
366 if (fd_pair(from_gen_pipe) < 0) {
367 rsyserr(FERROR, errno, "pipe");
368 exit_cleanup(RERR_IPC);
370 batch_gen_fd = from_gen_pipe[0];
371 *f_out = from_gen_pipe[1];
373 ret = -1; /* no child pid */
374 } else if (local_server) {
375 /* If the user didn't request --[no-]whole-file, force
376 * it on, but only if we're not batch processing. */
377 if (whole_file < 0 && !write_batch)
379 ret = local_child(argc, args, f_in, f_out, child_main);
381 ret = piped_child(args,f_in,f_out);
389 out_of_memory("do_cmd");
390 return 0; /* not reached */
394 static char *get_local_name(struct file_list *flist,char *name)
400 rprintf(FINFO,"get_local_name count=%d %s\n",
401 flist->count, NS(name));
406 if (do_stat(name,&st) == 0) {
407 if (S_ISDIR(st.st_mode)) {
408 if (!push_dir(name)) {
409 rsyserr(FERROR, errno, "push_dir#1 %s failed",
411 exit_cleanup(RERR_FILESELECT);
415 if (flist->count > 1) {
416 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
417 exit_cleanup(RERR_FILESELECT);
422 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
425 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
426 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
427 exit_cleanup(RERR_FILEIO);
430 rprintf(FINFO, "created directory %s\n", safe_fname(name));
437 if (!push_dir(name)) {
438 rsyserr(FERROR, errno, "push_dir#2 %s failed",
440 exit_cleanup(RERR_FILESELECT);
447 /* This is only called by the sender. */
448 static void read_final_goodbye(int f_in, int f_out)
452 if (protocol_version < 29)
455 while ((i = read_int(f_in)) == the_file_list->count
456 && read_shortint(f_in) == ITEM_IS_NEW) {
457 /* Forward the keep-alive (no-op) to the receiver. */
458 write_int(f_out, the_file_list->count);
459 write_shortint(f_out, ITEM_IS_NEW);
464 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
466 exit_cleanup(RERR_PROTOCOL);
471 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
473 struct file_list *flist;
477 rprintf(FINFO, "server_sender starting pid=%ld\n",
481 if (am_daemon && lp_write_only(module_id)) {
482 rprintf(FERROR, "ERROR: module is write only\n");
483 exit_cleanup(RERR_SYNTAX);
486 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
488 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
489 exit_cleanup(RERR_SYNTAX);
493 if (!relative_paths && !push_dir(dir)) {
494 rsyserr(FERROR, errno, "push_dir#3 %s failed",
496 exit_cleanup(RERR_FILESELECT);
501 if (argc == 0 && (recurse || list_only)) {
507 flist = send_file_list(f_out,argc,argv);
508 if (!flist || flist->count == 0) {
511 the_file_list = flist;
513 io_start_buffering_in();
514 io_start_buffering_out();
516 send_files(flist,f_out,f_in);
517 io_flush(FULL_FLUSH);
519 if (protocol_version >= 24)
520 read_final_goodbye(f_in, f_out);
521 io_flush(FULL_FLUSH);
526 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
532 /* The receiving side mustn't obey this, or an existing symlink that
533 * points to an identical file won't be replaced by the referent. */
536 if (preserve_hard_links)
539 if (fd_pair(error_pipe) < 0) {
540 rsyserr(FERROR, errno, "pipe failed in do_recv");
541 exit_cleanup(RERR_IPC);
544 io_flush(NORMAL_FLUSH);
546 if ((pid = do_fork()) == -1) {
547 rsyserr(FERROR, errno, "fork failed in do_recv");
548 exit_cleanup(RERR_IPC);
552 close(error_pipe[0]);
556 /* we can't let two processes write to the socket at one time */
557 close_multiplexing_out();
559 /* set place to send errors */
560 set_msg_fd_out(error_pipe[1]);
562 recv_files(f_in, flist, local_name);
563 io_flush(FULL_FLUSH);
566 send_msg(MSG_DONE, "", 0);
567 io_flush(FULL_FLUSH);
569 /* Handle any keep-alive packets from the post-processing work
570 * that the generator does. */
571 if (protocol_version >= 29) {
572 kluge_around_eof = -1;
574 /* This should only get stopped via a USR2 signal. */
575 while (read_int(f_in) == flist->count
576 && read_shortint(f_in) == ITEM_IS_NEW) {}
578 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
580 exit_cleanup(RERR_PROTOCOL);
583 /* Finally, we go to sleep until our parent kills us with a
584 * USR2 signal. We sleep for a short time, as on some OSes
585 * a signal won't interrupt a sleep! */
591 close_multiplexing_in();
592 if (write_batch && !am_server)
595 close(error_pipe[1]);
599 io_start_buffering_out();
601 set_msg_fd_in(error_pipe[0]);
603 generate_files(f_out, flist, local_name);
606 io_flush(FULL_FLUSH);
607 if (protocol_version >= 24) {
608 /* send a final goodbye message */
609 write_int(f_out, -1);
611 io_flush(FULL_FLUSH);
615 wait_process(pid, &status);
620 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
623 struct file_list *flist;
624 char *local_name = NULL;
626 int save_verbose = verbose;
628 if (filesfrom_fd >= 0) {
629 /* We can't mix messages with files-from data on the socket,
630 * so temporarily turn off verbose messages. */
635 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
636 argc, (long)getpid());
639 if (am_daemon && lp_read_only(module_id)) {
640 rprintf(FERROR,"ERROR: module is read only\n");
641 exit_cleanup(RERR_SYNTAX);
650 if (!am_daemon && !push_dir(dir)) {
651 rsyserr(FERROR, errno, "push_dir#4 %s failed",
653 exit_cleanup(RERR_FILESELECT);
657 io_start_buffering_in();
658 recv_filter_list(f_in);
660 if (filesfrom_fd >= 0) {
661 /* We need to send the files-from names to the sender at the
662 * same time that we receive the file-list from them, so we
663 * need the IO routines to automatically write out the names
664 * onto our f_out socket as we read the file-list. This
665 * avoids both deadlock and extra delays/buffers. */
666 io_set_filesfrom_fds(filesfrom_fd, f_out);
670 flist = recv_file_list(f_in);
671 verbose = save_verbose;
673 rprintf(FERROR,"server_recv: recv_file_list error\n");
674 exit_cleanup(RERR_FILESELECT);
676 the_file_list = flist;
679 local_name = get_local_name(flist,argv[0]);
681 status = do_recv(f_in,f_out,flist,local_name);
682 exit_cleanup(status);
686 int child_main(int argc, char *argv[])
688 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
693 void start_server(int f_in, int f_out, int argc, char *argv[])
695 set_nonblocking(f_in);
696 set_nonblocking(f_out);
698 io_set_sock_fds(f_in, f_out);
699 setup_protocol(f_out, f_in);
701 if (protocol_version >= 23)
702 io_start_multiplex_out();
705 keep_dirlinks = 0; /* Must be disabled on the sender. */
706 if (need_messages_from_generator)
707 io_start_multiplex_in();
709 recv_filter_list(f_in);
710 do_server_sender(f_in, f_out, argc, argv);
712 do_server_recv(f_in, f_out, argc, argv);
719 * This is called once the connection has been negotiated. It is used
720 * for rsyncd, remote-shell, and local connections.
722 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
724 struct file_list *flist = NULL;
725 int status = 0, status2 = 0;
726 char *local_name = NULL;
728 cleanup_child_pid = pid;
730 set_nonblocking(f_in);
731 set_nonblocking(f_out);
734 io_set_sock_fds(f_in, f_out);
735 setup_protocol(f_out,f_in);
737 if (protocol_version >= 23 && !read_batch)
738 io_start_multiplex_in();
740 /* We set our stderr file handle to blocking because ssh might have
741 * set it to non-blocking. This can be particularly troublesome if
742 * stderr is a clone of stdout, because ssh would have set our stdout
743 * to non-blocking at the same time (which can easily cause us to lose
744 * output from our print statements). This kluge shouldn't cause ssh
745 * any problems for how we use it. Note also that we delayed setting
746 * this until after the above protocol setup so that we know for sure
747 * that ssh is done twiddling its file descriptors. */
748 set_blocking(STDERR_FILENO);
751 keep_dirlinks = 0; /* Must be disabled on the sender. */
752 io_start_buffering_out();
755 send_filter_list(f_out);
759 if (write_batch && !am_server)
760 start_write_batch(f_out);
761 flist = send_file_list(f_out, argc, argv);
764 rprintf(FINFO,"file list sent\n");
765 the_file_list = flist;
767 io_flush(NORMAL_FLUSH);
768 send_files(flist,f_out,f_in);
769 io_flush(FULL_FLUSH);
771 if (protocol_version >= 24)
772 read_final_goodbye(f_in, f_out);
775 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
776 io_flush(FULL_FLUSH);
777 wait_process(pid, &status);
780 io_flush(FULL_FLUSH);
781 exit_cleanup(status);
784 if (need_messages_from_generator && !read_batch)
785 io_start_multiplex_out();
790 send_filter_list(read_batch ? -1 : f_out);
792 if (filesfrom_fd >= 0) {
793 io_set_filesfrom_fds(filesfrom_fd, f_out);
797 if (write_batch && !am_server)
798 start_write_batch(f_in);
799 flist = recv_file_list(f_in);
800 the_file_list = flist;
802 if (flist && flist->count > 0) {
803 local_name = get_local_name(flist, argv[0]);
805 status2 = do_recv(f_in, f_out, flist, local_name);
813 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
814 io_flush(FULL_FLUSH);
815 wait_process(pid, &status);
818 return MAX(status, status2);
821 static int copy_argv (char *argv[])
825 for (i = 0; argv[i]; i++) {
826 if (!(argv[i] = strdup(argv[i]))) {
827 rprintf (FERROR, "out of memory at %s(%d)\n",
838 * Start a client for either type of remote connection. Work out
839 * whether the arguments request a remote shell or rsyncd connection,
840 * and call the appropriate connection function, then run_client.
842 * Calls either start_socket_client (for sockets) or do_cmd and
843 * client_run (for ssh).
845 static int start_client(int argc, char *argv[])
848 char *shell_machine = NULL;
849 char *shell_path = NULL;
850 char *shell_user = NULL;
856 /* Don't clobber argv[] so that ps(1) can still show the right
858 if ((rc = copy_argv(argv)))
861 if (!read_batch) { /* for read_batch, NO source is specified */
863 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
864 if (shell_path) { /* source is remote */
867 if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
869 "The source and destination cannot both be remote.\n");
870 exit_cleanup(RERR_SYNTAX);
873 if (filesfrom_host && *filesfrom_host
874 && strcmp(filesfrom_host, shell_machine) != 0) {
876 "--files-from hostname is not the same as the transfer hostname\n");
877 exit_cleanup(RERR_SYNTAX);
881 return start_socket_client(shell_machine,
889 } else { /* source is local, check dest arg */
892 if (argc < 1) { /* destination required */
894 exit_cleanup(RERR_SYNTAX);
897 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
898 if (shell_path && filesfrom_host && *filesfrom_host
899 && strcmp(filesfrom_host, shell_machine) != 0) {
901 "--files-from hostname is not the same as the transfer hostname\n");
902 exit_cleanup(RERR_SYNTAX);
904 if (!shell_path) { /* no hostspec found, so src & dest are local */
906 if (filesfrom_host) {
908 "--files-from cannot be remote when the transfer is local\n");
909 exit_cleanup(RERR_SYNTAX);
911 shell_machine = NULL;
912 shell_path = argv[argc];
913 } else if (rsync_port) {
915 return start_socket_client(shell_machine,
922 } else { /* read_batch */
924 shell_path = argv[argc-1];
925 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
926 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
927 exit_cleanup(RERR_SYNTAX);
932 p = strrchr(shell_machine,'@');
935 shell_user = shell_machine;
941 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
942 shell_cmd ? safe_fname(shell_cmd) : "",
943 shell_machine ? safe_fname(shell_machine) : "",
944 shell_user ? safe_fname(shell_user) : "",
945 shell_path ? safe_fname(shell_path) : "");
948 /* for remote source, only single dest arg can remain ... */
949 if (!am_sender && argc > 1) {
951 exit_cleanup(RERR_SYNTAX);
954 /* ... or no dest at all */
955 if (!am_sender && argc == 0)
958 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
961 /* if we're running an rsync server on the remote host over a
962 * remote shell command, we need to do the RSYNCD protocol first */
963 if (daemon_over_rsh) {
965 tmpret = start_inband_exchange(shell_user, shell_path,
971 ret = client_run(f_in, f_out, pid, argc, argv);
980 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
982 exit_cleanup(RERR_SIGNAL);
985 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
995 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1000 /* An empty waitpid() loop was put here by Tridge and we could never
1001 * get him to explain why he put it in, so rather than taking it
1002 * out we're instead saving the child exit statuses for later use.
1003 * The waitpid() loop presumably eliminates all possibility of leaving
1004 * zombie children, maybe that's why he did it.
1006 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1007 /* save the child's exit status */
1008 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1009 if (pid_stat_table[cnt].pid == 0) {
1010 pid_stat_table[cnt].pid = pid;
1011 pid_stat_table[cnt].status = status;
1021 * This routine catches signals and tries to send them to gdb.
1023 * Because it's called from inside a signal handler it ought not to
1024 * use too many library routines.
1026 * @todo Perhaps use "screen -X" instead/as well, to help people
1027 * debugging without easy access to X. Perhaps use an environment
1028 * variable, or just call a script?
1030 * @todo The /proc/ magic probably only works on Linux (and
1031 * Solaris?) Can we be more portable?
1033 #ifdef MAINTAINER_MODE
1034 const char *get_panic_action(void)
1036 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1041 return "xterm -display :0 -T Panic -n Panic "
1042 "-e gdb /proc/%d/exe %d";
1047 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1049 * This signal handler is only installed if we were configured with
1050 * --enable-maintainer-mode. Perhaps it should always be on and we
1051 * should just look at the environment variable, but I'm a bit leery
1052 * of a signal sending us into a busy loop.
1054 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1059 sprintf(cmd_buf, get_panic_action(),
1060 getpid(), getpid());
1062 /* Unless we failed to execute gdb, we allow the process to
1063 * continue. I'm not sure if that's right. */
1064 ret = system(cmd_buf);
1071 int main(int argc,char *argv[])
1074 int orig_argc = argc;
1075 char **orig_argv = argv;
1077 signal(SIGUSR1, sigusr1_handler);
1078 signal(SIGUSR2, sigusr2_handler);
1079 signal(SIGCHLD, sigchld_handler);
1080 #ifdef MAINTAINER_MODE
1081 signal(SIGSEGV, rsync_panic_handler);
1082 signal(SIGFPE, rsync_panic_handler);
1083 signal(SIGABRT, rsync_panic_handler);
1084 signal(SIGBUS, rsync_panic_handler);
1085 #endif /* def MAINTAINER_MODE */
1087 starttime = time(NULL);
1088 am_root = (MY_UID() == 0);
1090 memset(&stats, 0, sizeof(stats));
1094 exit_cleanup(RERR_SYNTAX);
1097 /* we set a 0 umask so that correct file permissions can be
1099 orig_umask = (int)umask(0);
1101 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1102 /* FIXME: We ought to call the same error-handling
1103 * code here, rather than relying on getopt. */
1105 exit_cleanup(RERR_SYNTAX);
1108 signal(SIGINT,SIGNAL_CAST sig_int);
1109 signal(SIGHUP,SIGNAL_CAST sig_int);
1110 signal(SIGTERM,SIGNAL_CAST sig_int);
1112 /* Ignore SIGPIPE; we consistently check error codes and will
1114 signal(SIGPIPE, SIG_IGN);
1116 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1117 setlocale(LC_CTYPE, "");
1120 /* Initialize push_dir here because on some old systems getcwd
1121 * (implemented by forking "pwd" and reading its output) doesn't
1122 * work when there are other child processes. Also, on all systems
1123 * that implement getcwd that way "pwd" can't be found after chroot. */
1128 if ((write_batch || read_batch) && !am_server) {
1130 write_batch_shell_file(orig_argc, orig_argv, argc);
1132 if (read_batch && strcmp(batch_name, "-") == 0)
1133 batch_fd = STDIN_FILENO;
1135 batch_fd = do_open(batch_name,
1136 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1137 : O_RDONLY, S_IRUSR | S_IWUSR);
1140 rsyserr(FERROR, errno, "Batch file %s open error",
1141 full_fname(batch_name));
1142 exit_cleanup(RERR_FILEIO);
1145 read_stream_flags(batch_fd);
1147 if (write_batch < 0)
1150 if (am_daemon && !am_server)
1151 return daemon_main();
1155 exit_cleanup(RERR_SYNTAX);
1159 set_nonblocking(STDIN_FILENO);
1160 set_nonblocking(STDOUT_FILENO);
1162 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1163 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1166 ret = start_client(argc, argv);
1168 exit_cleanup(RERR_STARTCLIENT);