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;
48 extern int always_checksum;
50 extern int relative_paths;
51 extern int rsync_port;
52 extern int whole_file;
53 extern int read_batch;
54 extern int write_batch;
56 extern int batch_gen_fd;
57 extern int filesfrom_fd;
58 extern pid_t cleanup_child_pid;
59 extern struct stats stats;
60 extern char *filesfrom_host;
61 extern char *rsync_path;
62 extern char *shell_cmd;
63 extern char *batch_name;
64 extern char curr_dir[MAXPATHLEN];
68 struct file_list *the_file_list;
70 /* There's probably never more than at most 2 outstanding child processes,
71 * but set it higher, just in case. */
72 #define MAXCHILDPROCS 5
77 } pid_stat_table[MAXCHILDPROCS];
79 static time_t starttime, endtime;
80 static int64 total_read, total_written;
82 static void show_malloc_stats(void);
84 /* Works like waitpid(), but if we already harvested the child pid in our
85 * sigchld_handler(), we succeed instead of returning an error. */
86 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
88 pid_t waited_pid = waitpid(pid, status_ptr, flags);
90 if (waited_pid == -1 && errno == ECHILD) {
91 /* Status of requested child no longer available: check to
92 * see if it was processed by sigchld_handler(). */
94 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
95 if (pid == pid_stat_table[cnt].pid) {
96 *status_ptr = pid_stat_table[cnt].status;
97 pid_stat_table[cnt].pid = 0;
106 /* Wait for a process to exit, calling io_flush while waiting. */
107 static void wait_process_with_flush(pid_t pid, int *code_ptr)
112 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
114 io_flush(FULL_FLUSH);
117 /* TODO: If the child exited on a signal, then log an
118 * appropriate error message. Perhaps we should also accept a
119 * message describing the purpose of the child. Also indicate
120 * this to the caller so that they know something went wrong. */
122 *code_ptr = RERR_WAITCHILD;
123 else if (!WIFEXITED(status)) {
125 if (WCOREDUMP(status))
126 *code_ptr = RERR_CRASHED;
129 if (WIFSIGNALED(status))
130 *code_ptr = RERR_TERMINATED;
132 *code_ptr = RERR_WAITCHILD;
134 *code_ptr = WEXITSTATUS(status);
137 /* This function gets called from all 3 processes. We want the client side
138 * to actually output the text, but the sender is the only process that has
139 * all the stats we need. So, if we're a client sender, we do the report.
140 * If we're a server sender, we write the stats on the supplied fd. If
141 * we're the client receiver we read the stats from the supplied fd and do
142 * the report. All processes might also generate a set of debug stats, if
143 * the verbose level is high enough (this is the only thing that the
144 * generator process and the server receiver ever do here). */
145 static void handle_stats(int f)
147 endtime = time(NULL);
149 /* Cache two stats because the read/write code can change it. */
150 total_read = stats.total_read;
151 total_written = stats.total_written;
153 if (do_stats && verbose > 1) {
154 /* These come out from every process */
163 log_exit(0, __FILE__, __LINE__);
164 if (f == -1 || !am_sender)
170 write_longint(f, total_read);
171 write_longint(f, total_written);
172 write_longint(f, stats.total_size);
173 if (protocol_version >= 29) {
174 write_longint(f, stats.flist_buildtime);
175 write_longint(f, stats.flist_xfertime);
181 /* this is the client */
183 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
185 else if (!am_sender) {
186 /* Read the first two in opposite order because the meaning of
187 * read/write swaps when switching from sender to receiver. */
188 total_written = read_longint(f);
189 total_read = read_longint(f);
190 stats.total_size = read_longint(f);
191 if (protocol_version >= 29) {
192 stats.flist_buildtime = read_longint(f);
193 stats.flist_xfertime = read_longint(f);
195 } else if (write_batch) {
196 /* The --read-batch process is going to be a client
197 * receiver, so we need to give it the stats. */
198 write_longint(batch_fd, total_read);
199 write_longint(batch_fd, total_written);
200 write_longint(batch_fd, stats.total_size);
201 if (protocol_version >= 29) {
202 write_longint(batch_fd, stats.flist_buildtime);
203 write_longint(batch_fd, stats.flist_xfertime);
208 static void output_summary(void)
211 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
212 rprintf(FINFO,"Number of files transferred: %d\n",
213 stats.num_transferred_files);
214 rprintf(FINFO,"Total file size: %.0f bytes\n",
215 (double)stats.total_size);
216 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
217 (double)stats.total_transferred_size);
218 rprintf(FINFO,"Literal data: %.0f bytes\n",
219 (double)stats.literal_data);
220 rprintf(FINFO,"Matched data: %.0f bytes\n",
221 (double)stats.matched_data);
222 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
223 if (stats.flist_buildtime) {
225 "File list generation time: %.3f seconds\n",
226 (double)stats.flist_buildtime / 1000);
228 "File list transfer time: %.3f seconds\n",
229 (double)stats.flist_xfertime / 1000);
231 rprintf(FINFO,"Total bytes sent: %.0f\n",
232 (double)total_written);
233 rprintf(FINFO,"Total bytes received: %.0f\n",
237 if (verbose || do_stats) {
239 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
240 (double)total_written, (double)total_read,
241 (total_written + total_read)/(0.5 + (endtime - starttime)));
242 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
243 (double)stats.total_size,
244 (double)stats.total_size / (total_written+total_read));
253 * If our C library can get malloc statistics, then show them to FINFO
255 static void show_malloc_stats(void)
262 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
263 getpid(), am_server ? "server " : "",
264 am_daemon ? "daemon " : "", who_am_i());
265 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
267 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
269 rprintf(FINFO, " smblks: %10ld\n",
271 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
273 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
275 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
276 (long)mi.arena + mi.hblkhd);
277 rprintf(FINFO, " usmblks: %10ld\n",
279 rprintf(FINFO, " fsmblks: %10ld\n",
281 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
283 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
285 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
287 #endif /* HAVE_MALLINFO */
291 /* Start the remote shell. cmd may be NULL to use the default. */
292 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
293 int *f_in, int *f_out)
296 char *args[MAX_ARGS];
298 char *tok, *dir = NULL;
301 if (!read_batch && !local_server) {
302 char *rsh_env = getenv(RSYNC_RSH_ENV);
311 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
312 /* Comparison leaves rooms for server_options(). */
313 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
314 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
315 exit_cleanup(RERR_SYNTAX);
320 /* check to see if we've already been given '-l user' in
321 * the remote-shell command */
322 for (i = 0; i < argc-1; i++) {
323 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
328 /* remsh (on HPUX) takes the arguments the other way around */
329 args[argc++] = machine;
330 if (user && !(daemon_over_rsh && dash_l_set)) {
335 if (user && !(daemon_over_rsh && dash_l_set)) {
339 args[argc++] = machine;
342 args[argc++] = rsync_path;
344 if (blocking_io < 0) {
346 if ((cp = strrchr(cmd, '/')) != NULL)
350 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
354 server_options(args,&argc);
356 if (argc >= MAX_ARGS - 2) {
357 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
358 exit_cleanup(RERR_SYNTAX);
364 if (!daemon_over_rsh && path && *path)
370 rprintf(FINFO,"cmd=");
371 for (i = 0; i < argc; i++)
372 rprintf(FINFO, "%s ", safe_fname(args[i]));
377 int from_gen_pipe[2];
378 if (fd_pair(from_gen_pipe) < 0) {
379 rsyserr(FERROR, errno, "pipe");
380 exit_cleanup(RERR_IPC);
382 batch_gen_fd = from_gen_pipe[0];
383 *f_out = from_gen_pipe[1];
385 ret = -1; /* no child pid */
386 } else if (local_server) {
387 /* If the user didn't request --[no-]whole-file, force
388 * it on, but only if we're not batch processing. */
389 if (whole_file < 0 && !write_batch)
391 ret = local_child(argc, args, f_in, f_out, child_main);
393 ret = piped_child(args,f_in,f_out);
401 out_of_memory("do_cmd");
402 return 0; /* not reached */
406 static char *get_local_name(struct file_list *flist,char *name)
412 rprintf(FINFO,"get_local_name count=%d %s\n",
413 flist->count, NS(name));
418 if (do_stat(name,&st) == 0) {
419 if (S_ISDIR(st.st_mode)) {
420 if (!push_dir(name)) {
421 rsyserr(FERROR, errno, "push_dir#1 %s failed",
423 exit_cleanup(RERR_FILESELECT);
427 if (flist->count > 1) {
428 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
429 exit_cleanup(RERR_FILESELECT);
434 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
437 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
438 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
439 exit_cleanup(RERR_FILEIO);
442 rprintf(FINFO, "created directory %s\n", safe_fname(name));
449 if (!push_dir(name)) {
450 rsyserr(FERROR, errno, "push_dir#2 %s failed",
452 exit_cleanup(RERR_FILESELECT);
459 /* This is only called by the sender. */
460 static void read_final_goodbye(int f_in, int f_out)
464 if (protocol_version < 29)
467 while ((i = read_int(f_in)) == the_file_list->count
468 && read_shortint(f_in) == ITEM_IS_NEW) {
469 /* Forward the keep-alive (no-op) to the receiver. */
470 write_int(f_out, the_file_list->count);
471 write_shortint(f_out, ITEM_IS_NEW);
476 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
478 exit_cleanup(RERR_PROTOCOL);
483 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
485 struct file_list *flist;
489 rprintf(FINFO, "server_sender starting pid=%ld\n",
493 if (am_daemon && lp_write_only(module_id)) {
494 rprintf(FERROR, "ERROR: module is write only\n");
495 exit_cleanup(RERR_SYNTAX);
498 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
500 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
501 exit_cleanup(RERR_SYNTAX);
505 if (!relative_paths && !push_dir(dir)) {
506 rsyserr(FERROR, errno, "push_dir#3 %s failed",
508 exit_cleanup(RERR_FILESELECT);
513 if (argc == 0 && (recurse || list_only)) {
519 flist = send_file_list(f_out,argc,argv);
520 if (!flist || flist->count == 0) {
523 the_file_list = flist;
525 io_start_buffering_in();
526 io_start_buffering_out();
528 send_files(flist,f_out,f_in);
529 io_flush(FULL_FLUSH);
531 if (protocol_version >= 24)
532 read_final_goodbye(f_in, f_out);
533 io_flush(FULL_FLUSH);
538 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
544 /* The receiving side mustn't obey this, or an existing symlink that
545 * points to an identical file won't be replaced by the referent. */
548 if (preserve_hard_links)
551 if (fd_pair(error_pipe) < 0) {
552 rsyserr(FERROR, errno, "pipe failed in do_recv");
553 exit_cleanup(RERR_IPC);
556 io_flush(NORMAL_FLUSH);
558 if ((pid = do_fork()) == -1) {
559 rsyserr(FERROR, errno, "fork failed in do_recv");
560 exit_cleanup(RERR_IPC);
564 close(error_pipe[0]);
568 /* we can't let two processes write to the socket at one time */
569 close_multiplexing_out();
571 /* set place to send errors */
572 set_msg_fd_out(error_pipe[1]);
574 recv_files(f_in, flist, local_name);
575 io_flush(FULL_FLUSH);
578 send_msg(MSG_DONE, "", 0);
579 io_flush(FULL_FLUSH);
581 /* Handle any keep-alive packets from the post-processing work
582 * that the generator does. */
583 if (protocol_version >= 29) {
584 kluge_around_eof = -1;
586 /* This should only get stopped via a USR2 signal. */
587 while (read_int(f_in) == flist->count
588 && read_shortint(f_in) == ITEM_IS_NEW) {}
590 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
592 exit_cleanup(RERR_PROTOCOL);
595 /* Finally, we go to sleep until our parent kills us with a
596 * USR2 signal. We sleep for a short time, as on some OSes
597 * a signal won't interrupt a sleep! */
603 close_multiplexing_in();
604 if (write_batch && !am_server)
607 close(error_pipe[1]);
611 io_start_buffering_out();
613 set_msg_fd_in(error_pipe[0]);
615 generate_files(f_out, flist, local_name);
618 io_flush(FULL_FLUSH);
619 if (protocol_version >= 24) {
620 /* send a final goodbye message */
621 write_int(f_out, -1);
623 io_flush(FULL_FLUSH);
627 wait_process_with_flush(pid, &status);
632 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
635 struct file_list *flist;
636 char *local_name = NULL;
638 char olddir[sizeof curr_dir];
639 int save_verbose = verbose;
641 if (filesfrom_fd >= 0) {
642 /* We can't mix messages with files-from data on the socket,
643 * so temporarily turn off verbose messages. */
648 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
649 argc, (long)getpid());
652 if (am_daemon && lp_read_only(module_id)) {
653 rprintf(FERROR,"ERROR: module is read only\n");
654 exit_cleanup(RERR_SYNTAX);
663 if (!am_daemon && !push_dir(dir)) {
664 rsyserr(FERROR, errno, "push_dir#4 %s failed",
666 exit_cleanup(RERR_FILESELECT);
670 io_start_buffering_in();
671 recv_filter_list(f_in);
673 if (filesfrom_fd >= 0) {
674 /* We need to send the files-from names to the sender at the
675 * same time that we receive the file-list from them, so we
676 * need the IO routines to automatically write out the names
677 * onto our f_out socket as we read the file-list. This
678 * avoids both deadlock and extra delays/buffers. */
679 io_set_filesfrom_fds(filesfrom_fd, f_out);
683 strlcpy(olddir, curr_dir, sizeof olddir);
684 if (always_checksum && argc > 0)
685 pre_checksum = push_dir(argv[0]);
687 flist = recv_file_list(f_in);
688 verbose = save_verbose;
690 rprintf(FERROR,"server_recv: recv_file_list error\n");
691 exit_cleanup(RERR_FILESELECT);
693 the_file_list = flist;
699 local_name = get_local_name(flist,argv[0]);
701 status = do_recv(f_in,f_out,flist,local_name);
702 exit_cleanup(status);
706 int child_main(int argc, char *argv[])
708 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
713 void start_server(int f_in, int f_out, int argc, char *argv[])
715 set_nonblocking(f_in);
716 set_nonblocking(f_out);
718 io_set_sock_fds(f_in, f_out);
719 setup_protocol(f_out, f_in);
721 if (protocol_version >= 23)
722 io_start_multiplex_out();
725 keep_dirlinks = 0; /* Must be disabled on the sender. */
726 if (need_messages_from_generator)
727 io_start_multiplex_in();
729 recv_filter_list(f_in);
730 do_server_sender(f_in, f_out, argc, argv);
732 do_server_recv(f_in, f_out, argc, argv);
739 * This is called once the connection has been negotiated. It is used
740 * for rsyncd, remote-shell, and local connections.
742 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
744 struct file_list *flist = NULL;
745 int status = 0, status2 = 0;
746 char olddir[sizeof curr_dir];
747 char *local_name = NULL;
749 cleanup_child_pid = pid;
751 set_nonblocking(f_in);
752 set_nonblocking(f_out);
755 io_set_sock_fds(f_in, f_out);
756 setup_protocol(f_out,f_in);
758 if (protocol_version >= 23 && !read_batch)
759 io_start_multiplex_in();
761 /* We set our stderr file handle to blocking because ssh might have
762 * set it to non-blocking. This can be particularly troublesome if
763 * stderr is a clone of stdout, because ssh would have set our stdout
764 * to non-blocking at the same time (which can easily cause us to lose
765 * output from our print statements). This kluge shouldn't cause ssh
766 * any problems for how we use it. Note also that we delayed setting
767 * this until after the above protocol setup so that we know for sure
768 * that ssh is done twiddling its file descriptors. */
769 set_blocking(STDERR_FILENO);
772 keep_dirlinks = 0; /* Must be disabled on the sender. */
773 io_start_buffering_out();
776 send_filter_list(f_out);
780 if (write_batch && !am_server)
781 start_write_batch(f_out);
782 flist = send_file_list(f_out, argc, argv);
785 rprintf(FINFO,"file list sent\n");
786 the_file_list = flist;
788 io_flush(NORMAL_FLUSH);
789 send_files(flist,f_out,f_in);
790 io_flush(FULL_FLUSH);
792 if (protocol_version >= 24)
793 read_final_goodbye(f_in, f_out);
796 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
797 io_flush(FULL_FLUSH);
798 wait_process_with_flush(pid, &status);
801 io_flush(FULL_FLUSH);
802 exit_cleanup(status);
805 if (need_messages_from_generator && !read_batch)
806 io_start_multiplex_out();
811 send_filter_list(read_batch ? -1 : f_out);
813 if (filesfrom_fd >= 0) {
814 io_set_filesfrom_fds(filesfrom_fd, f_out);
818 strlcpy(olddir, curr_dir, sizeof olddir);
820 pre_checksum = push_dir(argv[0]);
822 if (write_batch && !am_server)
823 start_write_batch(f_in);
824 flist = recv_file_list(f_in);
825 the_file_list = flist;
830 if (flist && flist->count > 0) {
831 local_name = get_local_name(flist, argv[0]);
833 status2 = do_recv(f_in, f_out, flist, local_name);
841 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
842 io_flush(FULL_FLUSH);
843 wait_process_with_flush(pid, &status);
846 return MAX(status, status2);
849 static int copy_argv (char *argv[])
853 for (i = 0; argv[i]; i++) {
854 if (!(argv[i] = strdup(argv[i]))) {
855 rprintf (FERROR, "out of memory at %s(%d)\n",
866 * Start a client for either type of remote connection. Work out
867 * whether the arguments request a remote shell or rsyncd connection,
868 * and call the appropriate connection function, then run_client.
870 * Calls either start_socket_client (for sockets) or do_cmd and
871 * client_run (for ssh).
873 static int start_client(int argc, char *argv[])
876 char *shell_machine = NULL;
877 char *shell_path = NULL;
878 char *shell_user = NULL;
884 /* Don't clobber argv[] so that ps(1) can still show the right
886 if ((rc = copy_argv(argv)))
889 if (!read_batch) { /* for read_batch, NO source is specified */
891 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
892 if (shell_path) { /* source is remote */
895 if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
897 "The source and destination cannot both be remote.\n");
898 exit_cleanup(RERR_SYNTAX);
901 if (filesfrom_host && *filesfrom_host
902 && strcmp(filesfrom_host, shell_machine) != 0) {
904 "--files-from hostname is not the same as the transfer hostname\n");
905 exit_cleanup(RERR_SYNTAX);
909 return start_socket_client(shell_machine,
917 } else { /* source is local, check dest arg */
920 if (argc < 1) { /* destination required */
922 exit_cleanup(RERR_SYNTAX);
925 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
926 if (shell_path && filesfrom_host && *filesfrom_host
927 && strcmp(filesfrom_host, shell_machine) != 0) {
929 "--files-from hostname is not the same as the transfer hostname\n");
930 exit_cleanup(RERR_SYNTAX);
932 if (!shell_path) { /* no hostspec found, so src & dest are local */
934 if (filesfrom_host) {
936 "--files-from cannot be remote when the transfer is local\n");
937 exit_cleanup(RERR_SYNTAX);
939 shell_machine = NULL;
940 shell_path = argv[argc];
941 } else if (rsync_port) {
943 return start_socket_client(shell_machine,
950 } else { /* read_batch */
952 shell_path = argv[argc-1];
953 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
954 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
955 exit_cleanup(RERR_SYNTAX);
960 p = strrchr(shell_machine,'@');
963 shell_user = shell_machine;
969 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
970 shell_cmd ? safe_fname(shell_cmd) : "",
971 shell_machine ? safe_fname(shell_machine) : "",
972 shell_user ? safe_fname(shell_user) : "",
973 shell_path ? safe_fname(shell_path) : "");
976 /* for remote source, only single dest arg can remain ... */
977 if (!am_sender && argc > 1) {
979 exit_cleanup(RERR_SYNTAX);
982 /* ... or no dest at all */
983 if (!am_sender && argc == 0)
986 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
989 /* if we're running an rsync server on the remote host over a
990 * remote shell command, we need to do the RSYNCD protocol first */
991 if (daemon_over_rsh) {
993 tmpret = start_inband_exchange(shell_user, shell_path,
999 ret = client_run(f_in, f_out, pid, argc, argv);
1008 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1010 exit_cleanup(RERR_SIGNAL);
1013 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1019 _exit(RERR_PARTIAL);
1023 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1028 /* An empty waitpid() loop was put here by Tridge and we could never
1029 * get him to explain why he put it in, so rather than taking it
1030 * out we're instead saving the child exit statuses for later use.
1031 * The waitpid() loop presumably eliminates all possibility of leaving
1032 * zombie children, maybe that's why he did it. */
1033 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1034 /* save the child's exit status */
1035 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1036 if (pid_stat_table[cnt].pid == 0) {
1037 pid_stat_table[cnt].pid = pid;
1038 pid_stat_table[cnt].status = status;
1044 signal(SIGCHLD, sigchld_handler);
1049 * This routine catches signals and tries to send them to gdb.
1051 * Because it's called from inside a signal handler it ought not to
1052 * use too many library routines.
1054 * @todo Perhaps use "screen -X" instead/as well, to help people
1055 * debugging without easy access to X. Perhaps use an environment
1056 * variable, or just call a script?
1058 * @todo The /proc/ magic probably only works on Linux (and
1059 * Solaris?) Can we be more portable?
1061 #ifdef MAINTAINER_MODE
1062 const char *get_panic_action(void)
1064 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1069 return "xterm -display :0 -T Panic -n Panic "
1070 "-e gdb /proc/%d/exe %d";
1075 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1077 * This signal handler is only installed if we were configured with
1078 * --enable-maintainer-mode. Perhaps it should always be on and we
1079 * should just look at the environment variable, but I'm a bit leery
1080 * of a signal sending us into a busy loop.
1082 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1087 sprintf(cmd_buf, get_panic_action(),
1088 getpid(), getpid());
1090 /* Unless we failed to execute gdb, we allow the process to
1091 * continue. I'm not sure if that's right. */
1092 ret = system(cmd_buf);
1099 int main(int argc,char *argv[])
1102 int orig_argc = argc;
1103 char **orig_argv = argv;
1105 signal(SIGUSR1, sigusr1_handler);
1106 signal(SIGUSR2, sigusr2_handler);
1107 signal(SIGCHLD, sigchld_handler);
1108 #ifdef MAINTAINER_MODE
1109 signal(SIGSEGV, rsync_panic_handler);
1110 signal(SIGFPE, rsync_panic_handler);
1111 signal(SIGABRT, rsync_panic_handler);
1112 signal(SIGBUS, rsync_panic_handler);
1113 #endif /* def MAINTAINER_MODE */
1115 starttime = time(NULL);
1116 am_root = (MY_UID() == 0);
1118 memset(&stats, 0, sizeof(stats));
1122 exit_cleanup(RERR_SYNTAX);
1125 /* we set a 0 umask so that correct file permissions can be
1127 orig_umask = (int)umask(0);
1129 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1130 /* FIXME: We ought to call the same error-handling
1131 * code here, rather than relying on getopt. */
1133 exit_cleanup(RERR_SYNTAX);
1136 signal(SIGINT,SIGNAL_CAST sig_int);
1137 signal(SIGHUP,SIGNAL_CAST sig_int);
1138 signal(SIGTERM,SIGNAL_CAST sig_int);
1140 /* Ignore SIGPIPE; we consistently check error codes and will
1142 signal(SIGPIPE, SIG_IGN);
1144 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1145 setlocale(LC_CTYPE, "");
1148 /* Initialize push_dir here because on some old systems getcwd
1149 * (implemented by forking "pwd" and reading its output) doesn't
1150 * work when there are other child processes. Also, on all systems
1151 * that implement getcwd that way "pwd" can't be found after chroot. */
1156 if ((write_batch || read_batch) && !am_server) {
1158 write_batch_shell_file(orig_argc, orig_argv, argc);
1160 if (read_batch && strcmp(batch_name, "-") == 0)
1161 batch_fd = STDIN_FILENO;
1163 batch_fd = do_open(batch_name,
1164 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1165 : O_RDONLY, S_IRUSR | S_IWUSR);
1168 rsyserr(FERROR, errno, "Batch file %s open error",
1169 full_fname(batch_name));
1170 exit_cleanup(RERR_FILEIO);
1173 read_stream_flags(batch_fd);
1175 if (write_batch < 0)
1178 if (am_daemon && !am_server)
1179 return daemon_main();
1183 exit_cleanup(RERR_SYNTAX);
1187 set_nonblocking(STDIN_FILENO);
1188 set_nonblocking(STDOUT_FILENO);
1190 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1191 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1194 ret = start_client(argc, argv);
1196 exit_cleanup(RERR_STARTCLIENT);