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 7
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 /* Works like waitpid(), but if we already harvested the child pid in our
82 * sigchld_handler(), we succeed instead of returning an error. */
83 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
85 pid_t waited_pid = waitpid(pid, status_ptr, flags);
87 if (waited_pid == -1 && errno == ECHILD) {
88 /* Status of requested child no longer available: check to
89 * see if it was processed by sigchld_handler(). */
91 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
92 if (pid == pid_stat_table[cnt].pid) {
93 *status_ptr = pid_stat_table[cnt].status;
94 pid_stat_table[cnt].pid = 0;
103 /* Wait for a process to exit, calling io_flush while waiting. */
104 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
109 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
111 io_flush(FULL_FLUSH);
114 /* TODO: If the child exited on a signal, then log an
115 * appropriate error message. Perhaps we should also accept a
116 * message describing the purpose of the child. Also indicate
117 * this to the caller so that they know something went wrong. */
118 if (waited_pid < 0) {
119 rsyserr(FERROR, errno, "waitpid");
120 *exit_code_ptr = RERR_WAITCHILD;
121 } else if (!WIFEXITED(status)) {
123 if (WCOREDUMP(status))
124 *exit_code_ptr = RERR_CRASHED;
127 if (WIFSIGNALED(status))
128 *exit_code_ptr = RERR_TERMINATED;
130 *exit_code_ptr = RERR_WAITCHILD;
132 *exit_code_ptr = WEXITSTATUS(status);
135 /* This function gets called from all 3 processes. We want the client side
136 * to actually output the text, but the sender is the only process that has
137 * all the stats we need. So, if we're a client sender, we do the report.
138 * If we're a server sender, we write the stats on the supplied fd. If
139 * we're the client receiver we read the stats from the supplied fd and do
140 * the report. All processes might also generate a set of debug stats, if
141 * the verbose level is high enough (this is the only thing that the
142 * generator process and the server receiver ever do here). */
143 static void handle_stats(int f)
145 endtime = time(NULL);
147 /* Cache two stats because the read/write code can change it. */
148 total_read = stats.total_read;
149 total_written = stats.total_written;
151 if (do_stats && verbose > 1) {
152 /* These come out from every process */
161 log_exit(0, __FILE__, __LINE__);
162 if (f == -1 || !am_sender)
168 write_longint(f, total_read);
169 write_longint(f, total_written);
170 write_longint(f, stats.total_size);
171 if (protocol_version >= 29) {
172 write_longint(f, stats.flist_buildtime);
173 write_longint(f, stats.flist_xfertime);
179 /* this is the client */
181 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
183 else if (!am_sender) {
184 /* Read the first two in opposite order because the meaning of
185 * read/write swaps when switching from sender to receiver. */
186 total_written = read_longint(f);
187 total_read = read_longint(f);
188 stats.total_size = read_longint(f);
189 if (protocol_version >= 29) {
190 stats.flist_buildtime = read_longint(f);
191 stats.flist_xfertime = read_longint(f);
193 } else if (write_batch) {
194 /* The --read-batch process is going to be a client
195 * receiver, so we need to give it the stats. */
196 write_longint(batch_fd, total_read);
197 write_longint(batch_fd, total_written);
198 write_longint(batch_fd, stats.total_size);
199 if (protocol_version >= 29) {
200 write_longint(batch_fd, stats.flist_buildtime);
201 write_longint(batch_fd, stats.flist_xfertime);
206 static void output_summary(void)
209 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
210 rprintf(FINFO,"Number of files transferred: %d\n",
211 stats.num_transferred_files);
212 rprintf(FINFO,"Total file size: %s bytes\n",
213 human_num(stats.total_size));
214 rprintf(FINFO,"Total transferred file size: %s bytes\n",
215 human_num(stats.total_transferred_size));
216 rprintf(FINFO,"Literal data: %s bytes\n",
217 human_num(stats.literal_data));
218 rprintf(FINFO,"Matched data: %s bytes\n",
219 human_num(stats.matched_data));
220 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
221 if (stats.flist_buildtime) {
223 "File list generation time: %.3f seconds\n",
224 (double)stats.flist_buildtime / 1000);
226 "File list transfer time: %.3f seconds\n",
227 (double)stats.flist_xfertime / 1000);
229 rprintf(FINFO,"Total bytes sent: %s\n",
230 human_num(total_written));
231 rprintf(FINFO,"Total bytes received: %s\n",
232 human_num(total_read));
235 if (verbose || do_stats) {
237 "\nsent %s bytes received %s bytes %s bytes/sec\n",
238 human_num(total_written), human_num(total_read),
239 human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
240 rprintf(FINFO, "total size is %s speedup is %.2f\n",
241 human_num(stats.total_size),
242 (double)stats.total_size / (total_written+total_read));
251 * If our C library can get malloc statistics, then show them to FINFO
253 static void show_malloc_stats(void)
260 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
261 getpid(), am_server ? "server " : "",
262 am_daemon ? "daemon " : "", who_am_i());
263 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
265 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
267 rprintf(FINFO, " smblks: %10ld\n",
269 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
271 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
273 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
274 (long)mi.arena + mi.hblkhd);
275 rprintf(FINFO, " usmblks: %10ld\n",
277 rprintf(FINFO, " fsmblks: %10ld\n",
279 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
281 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
283 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
285 #endif /* HAVE_MALLINFO */
289 /* Start the remote shell. cmd may be NULL to use the default. */
290 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
291 int *f_in, int *f_out)
294 char *args[MAX_ARGS];
299 if (!read_batch && !local_server) {
300 char *t, *f, in_quote = '\0';
301 char *rsh_env = getenv(RSYNC_RSH_ENV);
310 for (t = f = cmd; *f; f++) {
313 /* Comparison leaves rooms for server_options(). */
314 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
315 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
316 exit_cleanup(RERR_SYNTAX);
319 while (*f != ' ' || in_quote) {
323 "Missing trailing-%c in remote-shell command.\n",
325 exit_cleanup(RERR_SYNTAX);
330 if (*f == '\'' || *f == '"') {
335 if (*f == in_quote && *++f != in_quote) {
345 /* check to see if we've already been given '-l user' in
346 * the remote-shell command */
347 for (i = 0; i < argc-1; i++) {
348 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
353 /* remsh (on HPUX) takes the arguments the other way around */
354 args[argc++] = machine;
355 if (user && !(daemon_over_rsh && dash_l_set)) {
360 if (user && !(daemon_over_rsh && dash_l_set)) {
364 args[argc++] = machine;
367 args[argc++] = rsync_path;
369 if (blocking_io < 0) {
371 if ((cp = strrchr(cmd, '/')) != NULL)
375 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
379 server_options(args,&argc);
381 if (argc >= MAX_ARGS - 2) {
382 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
383 exit_cleanup(RERR_SYNTAX);
389 if (!daemon_over_rsh && path && *path)
395 for (i = 0; i < argc; i++)
396 rprintf(FINFO, "cmd[%d]=%s ", i, safe_fname(args[i]));
397 rprintf(FINFO, "\n");
401 int from_gen_pipe[2];
402 if (fd_pair(from_gen_pipe) < 0) {
403 rsyserr(FERROR, errno, "pipe");
404 exit_cleanup(RERR_IPC);
406 batch_gen_fd = from_gen_pipe[0];
407 *f_out = from_gen_pipe[1];
409 ret = -1; /* no child pid */
410 } else if (local_server) {
411 /* If the user didn't request --[no-]whole-file, force
412 * it on, but only if we're not batch processing. */
413 if (whole_file < 0 && !write_batch)
415 ret = local_child(argc, args, f_in, f_out, child_main);
417 ret = piped_child(args,f_in,f_out);
425 out_of_memory("do_cmd");
426 return 0; /* not reached */
430 static char *get_local_name(struct file_list *flist,char *name)
436 rprintf(FINFO,"get_local_name count=%d %s\n",
437 flist->count, NS(name));
442 if (do_stat(name,&st) == 0) {
443 if (S_ISDIR(st.st_mode)) {
444 if (!push_dir(name)) {
445 rsyserr(FERROR, errno, "push_dir#1 %s failed",
447 exit_cleanup(RERR_FILESELECT);
451 if (flist->count > 1) {
452 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
453 exit_cleanup(RERR_FILESELECT);
458 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
461 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
462 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
463 exit_cleanup(RERR_FILEIO);
466 rprintf(FINFO, "created directory %s\n", safe_fname(name));
473 if (!push_dir(name)) {
474 rsyserr(FERROR, errno, "push_dir#2 %s failed",
476 exit_cleanup(RERR_FILESELECT);
483 /* This is only called by the sender. */
484 static void read_final_goodbye(int f_in, int f_out)
488 if (protocol_version < 29)
491 while ((i = read_int(f_in)) == the_file_list->count
492 && read_shortint(f_in) == ITEM_IS_NEW) {
493 /* Forward the keep-alive (no-op) to the receiver. */
494 write_int(f_out, the_file_list->count);
495 write_shortint(f_out, ITEM_IS_NEW);
500 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
502 exit_cleanup(RERR_PROTOCOL);
507 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
509 struct file_list *flist;
513 rprintf(FINFO, "server_sender starting pid=%ld\n",
517 if (am_daemon && lp_write_only(module_id)) {
518 rprintf(FERROR, "ERROR: module is write only\n");
519 exit_cleanup(RERR_SYNTAX);
522 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
524 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
525 exit_cleanup(RERR_SYNTAX);
529 if (!relative_paths && !push_dir(dir)) {
530 rsyserr(FERROR, errno, "push_dir#3 %s failed",
532 exit_cleanup(RERR_FILESELECT);
537 if (argc == 0 && (recurse || list_only)) {
543 flist = send_file_list(f_out,argc,argv);
544 if (!flist || flist->count == 0) {
547 the_file_list = flist;
549 io_start_buffering_in();
550 io_start_buffering_out();
552 send_files(flist,f_out,f_in);
553 io_flush(FULL_FLUSH);
555 if (protocol_version >= 24)
556 read_final_goodbye(f_in, f_out);
557 io_flush(FULL_FLUSH);
562 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
568 /* The receiving side mustn't obey this, or an existing symlink that
569 * points to an identical file won't be replaced by the referent. */
572 if (preserve_hard_links)
575 if (fd_pair(error_pipe) < 0) {
576 rsyserr(FERROR, errno, "pipe failed in do_recv");
577 exit_cleanup(RERR_IPC);
580 io_flush(NORMAL_FLUSH);
582 if ((pid = do_fork()) == -1) {
583 rsyserr(FERROR, errno, "fork failed in do_recv");
584 exit_cleanup(RERR_IPC);
588 close(error_pipe[0]);
592 /* we can't let two processes write to the socket at one time */
593 close_multiplexing_out();
595 /* set place to send errors */
596 set_msg_fd_out(error_pipe[1]);
598 recv_files(f_in, flist, local_name);
599 io_flush(FULL_FLUSH);
602 send_msg(MSG_DONE, "", 0);
603 io_flush(FULL_FLUSH);
605 /* Handle any keep-alive packets from the post-processing work
606 * that the generator does. */
607 if (protocol_version >= 29) {
608 kluge_around_eof = -1;
610 /* This should only get stopped via a USR2 signal. */
611 while (read_int(f_in) == flist->count
612 && read_shortint(f_in) == ITEM_IS_NEW) {}
614 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
616 exit_cleanup(RERR_PROTOCOL);
619 /* Finally, we go to sleep until our parent kills us with a
620 * USR2 signal. We sleep for a short time, as on some OSes
621 * a signal won't interrupt a sleep! */
627 close_multiplexing_in();
628 if (write_batch && !am_server)
631 close(error_pipe[1]);
635 io_start_buffering_out();
637 set_msg_fd_in(error_pipe[0]);
639 generate_files(f_out, flist, local_name);
642 io_flush(FULL_FLUSH);
643 if (protocol_version >= 24) {
644 /* send a final goodbye message */
645 write_int(f_out, -1);
647 io_flush(FULL_FLUSH);
651 wait_process_with_flush(pid, &exit_code);
656 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
659 struct file_list *flist;
660 char *local_name = NULL;
662 int save_verbose = verbose;
664 if (filesfrom_fd >= 0) {
665 /* We can't mix messages with files-from data on the socket,
666 * so temporarily turn off verbose messages. */
671 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
672 argc, (long)getpid());
675 if (am_daemon && lp_read_only(module_id)) {
676 rprintf(FERROR,"ERROR: module is read only\n");
677 exit_cleanup(RERR_SYNTAX);
685 if (!am_daemon && !push_dir(dir)) {
686 rsyserr(FERROR, errno, "push_dir#4 %s failed",
688 exit_cleanup(RERR_FILESELECT);
692 io_start_buffering_in();
693 recv_filter_list(f_in);
695 if (filesfrom_fd >= 0) {
696 /* We need to send the files-from names to the sender at the
697 * same time that we receive the file-list from them, so we
698 * need the IO routines to automatically write out the names
699 * onto our f_out socket as we read the file-list. This
700 * avoids both deadlock and extra delays/buffers. */
701 io_set_filesfrom_fds(filesfrom_fd, f_out);
705 flist = recv_file_list(f_in);
706 verbose = save_verbose;
708 rprintf(FERROR,"server_recv: recv_file_list error\n");
709 exit_cleanup(RERR_FILESELECT);
711 the_file_list = flist;
714 local_name = get_local_name(flist,argv[0]);
716 exit_code = do_recv(f_in,f_out,flist,local_name);
717 exit_cleanup(exit_code);
721 int child_main(int argc, char *argv[])
723 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
728 void start_server(int f_in, int f_out, int argc, char *argv[])
730 set_nonblocking(f_in);
731 set_nonblocking(f_out);
733 io_set_sock_fds(f_in, f_out);
734 setup_protocol(f_out, f_in);
736 if (protocol_version >= 23)
737 io_start_multiplex_out();
740 keep_dirlinks = 0; /* Must be disabled on the sender. */
741 if (need_messages_from_generator)
742 io_start_multiplex_in();
744 recv_filter_list(f_in);
745 do_server_sender(f_in, f_out, argc, argv);
747 do_server_recv(f_in, f_out, argc, argv);
754 * This is called once the connection has been negotiated. It is used
755 * for rsyncd, remote-shell, and local connections.
757 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
759 struct file_list *flist = NULL;
760 int exit_code = 0, exit_code2 = 0;
761 char *local_name = NULL;
763 cleanup_child_pid = pid;
765 set_nonblocking(f_in);
766 set_nonblocking(f_out);
769 io_set_sock_fds(f_in, f_out);
770 setup_protocol(f_out,f_in);
772 if (protocol_version >= 23 && !read_batch)
773 io_start_multiplex_in();
775 /* We set our stderr file handle to blocking because ssh might have
776 * set it to non-blocking. This can be particularly troublesome if
777 * stderr is a clone of stdout, because ssh would have set our stdout
778 * to non-blocking at the same time (which can easily cause us to lose
779 * output from our print statements). This kluge shouldn't cause ssh
780 * any problems for how we use it. Note also that we delayed setting
781 * this until after the above protocol setup so that we know for sure
782 * that ssh is done twiddling its file descriptors. */
783 set_blocking(STDERR_FILENO);
786 keep_dirlinks = 0; /* Must be disabled on the sender. */
787 io_start_buffering_out();
790 send_filter_list(f_out);
794 if (write_batch && !am_server)
795 start_write_batch(f_out);
796 flist = send_file_list(f_out, argc, argv);
799 rprintf(FINFO,"file list sent\n");
800 the_file_list = flist;
802 io_flush(NORMAL_FLUSH);
803 send_files(flist,f_out,f_in);
804 io_flush(FULL_FLUSH);
806 if (protocol_version >= 24)
807 read_final_goodbye(f_in, f_out);
810 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
811 io_flush(FULL_FLUSH);
812 wait_process_with_flush(pid, &exit_code);
815 io_flush(FULL_FLUSH);
816 exit_cleanup(exit_code);
819 if (need_messages_from_generator && !read_batch)
820 io_start_multiplex_out();
825 send_filter_list(read_batch ? -1 : f_out);
827 if (filesfrom_fd >= 0) {
828 io_set_filesfrom_fds(filesfrom_fd, f_out);
832 if (write_batch && !am_server)
833 start_write_batch(f_in);
834 flist = recv_file_list(f_in);
835 the_file_list = flist;
837 if (flist && flist->count > 0) {
838 local_name = get_local_name(flist, argv[0]);
840 exit_code2 = do_recv(f_in, f_out, flist, local_name);
848 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
849 io_flush(FULL_FLUSH);
850 wait_process_with_flush(pid, &exit_code);
853 return MAX(exit_code, exit_code2);
856 static int copy_argv (char *argv[])
860 for (i = 0; argv[i]; i++) {
861 if (!(argv[i] = strdup(argv[i]))) {
862 rprintf (FERROR, "out of memory at %s(%d)\n",
873 * Start a client for either type of remote connection. Work out
874 * whether the arguments request a remote shell or rsyncd connection,
875 * and call the appropriate connection function, then run_client.
877 * Calls either start_socket_client (for sockets) or do_cmd and
878 * client_run (for ssh).
880 static int start_client(int argc, char *argv[])
883 char *shell_machine = NULL;
884 char *shell_path = NULL;
885 char *shell_user = NULL;
891 /* Don't clobber argv[] so that ps(1) can still show the right
893 if ((rc = copy_argv(argv)))
896 if (!read_batch) { /* for read_batch, NO source is specified */
898 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
899 if (shell_path) { /* source is remote */
902 if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
904 "The source and destination cannot both be remote.\n");
905 exit_cleanup(RERR_SYNTAX);
908 if (filesfrom_host && *filesfrom_host
909 && strcmp(filesfrom_host, shell_machine) != 0) {
911 "--files-from hostname is not the same as the transfer hostname\n");
912 exit_cleanup(RERR_SYNTAX);
916 return start_socket_client(shell_machine,
924 } else { /* source is local, check dest arg */
927 if (argc < 1) { /* destination required */
929 exit_cleanup(RERR_SYNTAX);
932 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
933 if (shell_path && filesfrom_host && *filesfrom_host
934 && strcmp(filesfrom_host, shell_machine) != 0) {
936 "--files-from hostname is not the same as the transfer hostname\n");
937 exit_cleanup(RERR_SYNTAX);
939 if (!shell_path) { /* no hostspec found, so src & dest are local */
941 if (filesfrom_host) {
943 "--files-from cannot be remote when the transfer is local\n");
944 exit_cleanup(RERR_SYNTAX);
946 shell_machine = NULL;
947 shell_path = argv[argc];
948 } else if (rsync_port) {
950 return start_socket_client(shell_machine,
957 } else { /* read_batch */
959 shell_path = argv[argc-1];
960 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
961 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
962 exit_cleanup(RERR_SYNTAX);
967 p = strrchr(shell_machine,'@');
970 shell_user = shell_machine;
976 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
977 shell_cmd ? safe_fname(shell_cmd) : "",
978 shell_machine ? safe_fname(shell_machine) : "",
979 shell_user ? safe_fname(shell_user) : "",
980 shell_path ? safe_fname(shell_path) : "");
983 /* for remote source, only single dest arg can remain ... */
984 if (!am_sender && argc > 1) {
986 exit_cleanup(RERR_SYNTAX);
989 /* ... or no dest at all */
990 if (!am_sender && argc == 0)
993 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
996 /* if we're running an rsync server on the remote host over a
997 * remote shell command, we need to do the RSYNCD protocol first */
998 if (daemon_over_rsh) {
1000 tmpret = start_inband_exchange(shell_user, shell_path,
1006 ret = client_run(f_in, f_out, pid, argc, argv);
1015 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1017 exit_cleanup(RERR_SIGNAL);
1020 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1026 _exit(RERR_PARTIAL);
1030 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1035 /* An empty waitpid() loop was put here by Tridge and we could never
1036 * get him to explain why he put it in, so rather than taking it
1037 * out we're instead saving the child exit statuses for later use.
1038 * The waitpid() loop presumably eliminates all possibility of leaving
1039 * zombie children, maybe that's why he did it. */
1040 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1041 /* save the child's exit status */
1042 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1043 if (pid_stat_table[cnt].pid == 0) {
1044 pid_stat_table[cnt].pid = pid;
1045 pid_stat_table[cnt].status = status;
1051 signal(SIGCHLD, sigchld_handler);
1056 * This routine catches signals and tries to send them to gdb.
1058 * Because it's called from inside a signal handler it ought not to
1059 * use too many library routines.
1061 * @todo Perhaps use "screen -X" instead/as well, to help people
1062 * debugging without easy access to X. Perhaps use an environment
1063 * variable, or just call a script?
1065 * @todo The /proc/ magic probably only works on Linux (and
1066 * Solaris?) Can we be more portable?
1068 #ifdef MAINTAINER_MODE
1069 const char *get_panic_action(void)
1071 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1076 return "xterm -display :0 -T Panic -n Panic "
1077 "-e gdb /proc/%d/exe %d";
1082 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1084 * This signal handler is only installed if we were configured with
1085 * --enable-maintainer-mode. Perhaps it should always be on and we
1086 * should just look at the environment variable, but I'm a bit leery
1087 * of a signal sending us into a busy loop.
1089 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1094 sprintf(cmd_buf, get_panic_action(),
1095 getpid(), getpid());
1097 /* Unless we failed to execute gdb, we allow the process to
1098 * continue. I'm not sure if that's right. */
1099 ret = system(cmd_buf);
1106 int main(int argc,char *argv[])
1109 int orig_argc = argc;
1110 char **orig_argv = argv;
1112 signal(SIGUSR1, sigusr1_handler);
1113 signal(SIGUSR2, sigusr2_handler);
1114 signal(SIGCHLD, sigchld_handler);
1115 #ifdef MAINTAINER_MODE
1116 signal(SIGSEGV, rsync_panic_handler);
1117 signal(SIGFPE, rsync_panic_handler);
1118 signal(SIGABRT, rsync_panic_handler);
1119 signal(SIGBUS, rsync_panic_handler);
1120 #endif /* def MAINTAINER_MODE */
1122 starttime = time(NULL);
1123 am_root = (MY_UID() == 0);
1125 memset(&stats, 0, sizeof(stats));
1129 exit_cleanup(RERR_SYNTAX);
1132 /* we set a 0 umask so that correct file permissions can be
1134 orig_umask = (int)umask(0);
1136 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1137 /* FIXME: We ought to call the same error-handling
1138 * code here, rather than relying on getopt. */
1140 exit_cleanup(RERR_SYNTAX);
1143 signal(SIGINT,SIGNAL_CAST sig_int);
1144 signal(SIGHUP,SIGNAL_CAST sig_int);
1145 signal(SIGTERM,SIGNAL_CAST sig_int);
1147 /* Ignore SIGPIPE; we consistently check error codes and will
1149 signal(SIGPIPE, SIG_IGN);
1151 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1152 setlocale(LC_CTYPE, "");
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) && !am_server) {
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",
1176 full_fname(batch_name));
1177 exit_cleanup(RERR_FILEIO);
1180 read_stream_flags(batch_fd);
1182 if (write_batch < 0)
1185 if (am_daemon && !am_server)
1186 return daemon_main();
1190 exit_cleanup(RERR_SYNTAX);
1194 set_nonblocking(STDIN_FILENO);
1195 set_nonblocking(STDOUT_FILENO);
1197 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1198 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1201 ret = start_client(argc, argv);
1203 exit_cleanup(RERR_STARTCLIENT);