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 7
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 *exit_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. */
121 if (waited_pid < 0) {
122 rsyserr(FERROR, errno, "waitpid");
123 *exit_code_ptr = RERR_WAITCHILD;
124 } else if (!WIFEXITED(status)) {
126 if (WCOREDUMP(status))
127 *exit_code_ptr = RERR_CRASHED;
130 if (WIFSIGNALED(status))
131 *exit_code_ptr = RERR_TERMINATED;
133 *exit_code_ptr = RERR_WAITCHILD;
135 *exit_code_ptr = WEXITSTATUS(status);
138 /* This function gets called from all 3 processes. We want the client side
139 * to actually output the text, but the sender is the only process that has
140 * all the stats we need. So, if we're a client sender, we do the report.
141 * If we're a server sender, we write the stats on the supplied fd. If
142 * we're the client receiver we read the stats from the supplied fd and do
143 * the report. All processes might also generate a set of debug stats, if
144 * the verbose level is high enough (this is the only thing that the
145 * generator process and the server receiver ever do here). */
146 static void handle_stats(int f)
148 endtime = time(NULL);
150 /* Cache two stats because the read/write code can change it. */
151 total_read = stats.total_read;
152 total_written = stats.total_written;
154 if (do_stats && verbose > 1) {
155 /* These come out from every process */
164 log_exit(0, __FILE__, __LINE__);
165 if (f == -1 || !am_sender)
171 write_longint(f, total_read);
172 write_longint(f, total_written);
173 write_longint(f, stats.total_size);
174 if (protocol_version >= 29) {
175 write_longint(f, stats.flist_buildtime);
176 write_longint(f, stats.flist_xfertime);
182 /* this is the client */
184 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
186 else if (!am_sender) {
187 /* Read the first two in opposite order because the meaning of
188 * read/write swaps when switching from sender to receiver. */
189 total_written = read_longint(f);
190 total_read = read_longint(f);
191 stats.total_size = read_longint(f);
192 if (protocol_version >= 29) {
193 stats.flist_buildtime = read_longint(f);
194 stats.flist_xfertime = read_longint(f);
196 } else if (write_batch) {
197 /* The --read-batch process is going to be a client
198 * receiver, so we need to give it the stats. */
199 write_longint(batch_fd, total_read);
200 write_longint(batch_fd, total_written);
201 write_longint(batch_fd, stats.total_size);
202 if (protocol_version >= 29) {
203 write_longint(batch_fd, stats.flist_buildtime);
204 write_longint(batch_fd, stats.flist_xfertime);
209 static void output_summary(void)
212 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
213 rprintf(FINFO,"Number of files transferred: %d\n",
214 stats.num_transferred_files);
215 rprintf(FINFO,"Total file size: %.0f bytes\n",
216 (double)stats.total_size);
217 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
218 (double)stats.total_transferred_size);
219 rprintf(FINFO,"Literal data: %.0f bytes\n",
220 (double)stats.literal_data);
221 rprintf(FINFO,"Matched data: %.0f bytes\n",
222 (double)stats.matched_data);
223 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
224 if (stats.flist_buildtime) {
226 "File list generation time: %.3f seconds\n",
227 (double)stats.flist_buildtime / 1000);
229 "File list transfer time: %.3f seconds\n",
230 (double)stats.flist_xfertime / 1000);
232 rprintf(FINFO,"Total bytes sent: %.0f\n",
233 (double)total_written);
234 rprintf(FINFO,"Total bytes received: %.0f\n",
238 if (verbose || do_stats) {
240 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
241 (double)total_written, (double)total_read,
242 (total_written + total_read)/(0.5 + (endtime - starttime)));
243 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
244 (double)stats.total_size,
245 (double)stats.total_size / (total_written+total_read));
254 * If our C library can get malloc statistics, then show them to FINFO
256 static void show_malloc_stats(void)
263 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
264 getpid(), am_server ? "server " : "",
265 am_daemon ? "daemon " : "", who_am_i());
266 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
268 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
270 rprintf(FINFO, " smblks: %10ld\n",
272 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
274 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
276 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
277 (long)mi.arena + mi.hblkhd);
278 rprintf(FINFO, " usmblks: %10ld\n",
280 rprintf(FINFO, " fsmblks: %10ld\n",
282 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
284 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
286 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
288 #endif /* HAVE_MALLINFO */
292 /* Start the remote shell. cmd may be NULL to use the default. */
293 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
294 int *f_in, int *f_out)
297 char *args[MAX_ARGS];
299 char *tok, *dir = NULL;
302 if (!read_batch && !local_server) {
303 char *rsh_env = getenv(RSYNC_RSH_ENV);
312 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
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);
321 /* check to see if we've already been given '-l user' in
322 * the remote-shell command */
323 for (i = 0; i < argc-1; i++) {
324 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
329 /* remsh (on HPUX) takes the arguments the other way around */
330 args[argc++] = machine;
331 if (user && !(daemon_over_rsh && dash_l_set)) {
336 if (user && !(daemon_over_rsh && dash_l_set)) {
340 args[argc++] = machine;
343 args[argc++] = rsync_path;
345 if (blocking_io < 0) {
347 if ((cp = strrchr(cmd, '/')) != NULL)
351 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
355 server_options(args,&argc);
357 if (argc >= MAX_ARGS - 2) {
358 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
359 exit_cleanup(RERR_SYNTAX);
365 if (!daemon_over_rsh && path && *path)
371 rprintf(FINFO,"cmd=");
372 for (i = 0; i < argc; i++)
373 rprintf(FINFO, "%s ", safe_fname(args[i]));
378 int from_gen_pipe[2];
379 if (fd_pair(from_gen_pipe) < 0) {
380 rsyserr(FERROR, errno, "pipe");
381 exit_cleanup(RERR_IPC);
383 batch_gen_fd = from_gen_pipe[0];
384 *f_out = from_gen_pipe[1];
386 ret = -1; /* no child pid */
387 } else if (local_server) {
388 /* If the user didn't request --[no-]whole-file, force
389 * it on, but only if we're not batch processing. */
390 if (whole_file < 0 && !write_batch)
392 ret = local_child(argc, args, f_in, f_out, child_main);
394 ret = piped_child(args,f_in,f_out);
402 out_of_memory("do_cmd");
403 return 0; /* not reached */
407 static char *get_local_name(struct file_list *flist,char *name)
413 rprintf(FINFO,"get_local_name count=%d %s\n",
414 flist->count, NS(name));
419 if (do_stat(name,&st) == 0) {
420 if (S_ISDIR(st.st_mode)) {
421 if (!push_dir(name)) {
422 rsyserr(FERROR, errno, "push_dir#1 %s failed",
424 exit_cleanup(RERR_FILESELECT);
428 if (flist->count > 1) {
429 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
430 exit_cleanup(RERR_FILESELECT);
435 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
438 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
439 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
440 exit_cleanup(RERR_FILEIO);
443 rprintf(FINFO, "created directory %s\n", safe_fname(name));
450 if (!push_dir(name)) {
451 rsyserr(FERROR, errno, "push_dir#2 %s failed",
453 exit_cleanup(RERR_FILESELECT);
460 /* This is only called by the sender. */
461 static void read_final_goodbye(int f_in, int f_out)
465 if (protocol_version < 29)
468 while ((i = read_int(f_in)) == the_file_list->count
469 && read_shortint(f_in) == ITEM_IS_NEW) {
470 /* Forward the keep-alive (no-op) to the receiver. */
471 write_int(f_out, the_file_list->count);
472 write_shortint(f_out, ITEM_IS_NEW);
477 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
479 exit_cleanup(RERR_PROTOCOL);
484 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
486 struct file_list *flist;
490 rprintf(FINFO, "server_sender starting pid=%ld\n",
494 if (am_daemon && lp_write_only(module_id)) {
495 rprintf(FERROR, "ERROR: module is write only\n");
496 exit_cleanup(RERR_SYNTAX);
499 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
501 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
502 exit_cleanup(RERR_SYNTAX);
506 if (!relative_paths && !push_dir(dir)) {
507 rsyserr(FERROR, errno, "push_dir#3 %s failed",
509 exit_cleanup(RERR_FILESELECT);
514 if (argc == 0 && (recurse || list_only)) {
520 flist = send_file_list(f_out,argc,argv);
521 if (!flist || flist->count == 0) {
524 the_file_list = flist;
526 io_start_buffering_in();
527 io_start_buffering_out();
529 send_files(flist,f_out,f_in);
530 io_flush(FULL_FLUSH);
532 if (protocol_version >= 24)
533 read_final_goodbye(f_in, f_out);
534 io_flush(FULL_FLUSH);
539 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
545 /* The receiving side mustn't obey this, or an existing symlink that
546 * points to an identical file won't be replaced by the referent. */
549 if (preserve_hard_links)
552 if (fd_pair(error_pipe) < 0) {
553 rsyserr(FERROR, errno, "pipe failed in do_recv");
554 exit_cleanup(RERR_IPC);
557 io_flush(NORMAL_FLUSH);
559 if ((pid = do_fork()) == -1) {
560 rsyserr(FERROR, errno, "fork failed in do_recv");
561 exit_cleanup(RERR_IPC);
565 close(error_pipe[0]);
569 /* we can't let two processes write to the socket at one time */
570 close_multiplexing_out();
572 /* set place to send errors */
573 set_msg_fd_out(error_pipe[1]);
575 recv_files(f_in, flist, local_name);
576 io_flush(FULL_FLUSH);
579 send_msg(MSG_DONE, "", 0);
580 io_flush(FULL_FLUSH);
582 /* Handle any keep-alive packets from the post-processing work
583 * that the generator does. */
584 if (protocol_version >= 29) {
585 kluge_around_eof = -1;
587 /* This should only get stopped via a USR2 signal. */
588 while (read_int(f_in) == flist->count
589 && read_shortint(f_in) == ITEM_IS_NEW) {}
591 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
593 exit_cleanup(RERR_PROTOCOL);
596 /* Finally, we go to sleep until our parent kills us with a
597 * USR2 signal. We sleep for a short time, as on some OSes
598 * a signal won't interrupt a sleep! */
604 close_multiplexing_in();
605 if (write_batch && !am_server)
608 close(error_pipe[1]);
612 io_start_buffering_out();
614 set_msg_fd_in(error_pipe[0]);
616 generate_files(f_out, flist, local_name);
619 io_flush(FULL_FLUSH);
620 if (protocol_version >= 24) {
621 /* send a final goodbye message */
622 write_int(f_out, -1);
624 io_flush(FULL_FLUSH);
628 wait_process_with_flush(pid, &exit_code);
633 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
636 struct file_list *flist;
637 char *local_name = NULL;
639 char olddir[sizeof curr_dir];
640 int save_verbose = verbose;
642 if (filesfrom_fd >= 0) {
643 /* We can't mix messages with files-from data on the socket,
644 * so temporarily turn off verbose messages. */
649 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
650 argc, (long)getpid());
653 if (am_daemon && lp_read_only(module_id)) {
654 rprintf(FERROR,"ERROR: module is read only\n");
655 exit_cleanup(RERR_SYNTAX);
664 if (!am_daemon && !push_dir(dir)) {
665 rsyserr(FERROR, errno, "push_dir#4 %s failed",
667 exit_cleanup(RERR_FILESELECT);
671 io_start_buffering_in();
672 recv_filter_list(f_in);
674 if (filesfrom_fd >= 0) {
675 /* We need to send the files-from names to the sender at the
676 * same time that we receive the file-list from them, so we
677 * need the IO routines to automatically write out the names
678 * onto our f_out socket as we read the file-list. This
679 * avoids both deadlock and extra delays/buffers. */
680 io_set_filesfrom_fds(filesfrom_fd, f_out);
684 strlcpy(olddir, curr_dir, sizeof olddir);
685 if (always_checksum && argc > 0)
686 pre_checksum = push_dir(argv[0]);
688 flist = recv_file_list(f_in);
689 verbose = save_verbose;
691 rprintf(FERROR,"server_recv: recv_file_list error\n");
692 exit_cleanup(RERR_FILESELECT);
694 the_file_list = flist;
700 local_name = get_local_name(flist,argv[0]);
702 exit_code = do_recv(f_in,f_out,flist,local_name);
703 exit_cleanup(exit_code);
707 int child_main(int argc, char *argv[])
709 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
714 void start_server(int f_in, int f_out, int argc, char *argv[])
716 set_nonblocking(f_in);
717 set_nonblocking(f_out);
719 io_set_sock_fds(f_in, f_out);
720 setup_protocol(f_out, f_in);
722 if (protocol_version >= 23)
723 io_start_multiplex_out();
726 keep_dirlinks = 0; /* Must be disabled on the sender. */
727 if (need_messages_from_generator)
728 io_start_multiplex_in();
730 recv_filter_list(f_in);
731 do_server_sender(f_in, f_out, argc, argv);
733 do_server_recv(f_in, f_out, argc, argv);
740 * This is called once the connection has been negotiated. It is used
741 * for rsyncd, remote-shell, and local connections.
743 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
745 struct file_list *flist = NULL;
746 int exit_code = 0, exit_code2 = 0;
747 char olddir[sizeof curr_dir];
748 char *local_name = NULL;
750 cleanup_child_pid = pid;
752 set_nonblocking(f_in);
753 set_nonblocking(f_out);
756 io_set_sock_fds(f_in, f_out);
757 setup_protocol(f_out,f_in);
759 if (protocol_version >= 23 && !read_batch)
760 io_start_multiplex_in();
762 /* We set our stderr file handle to blocking because ssh might have
763 * set it to non-blocking. This can be particularly troublesome if
764 * stderr is a clone of stdout, because ssh would have set our stdout
765 * to non-blocking at the same time (which can easily cause us to lose
766 * output from our print statements). This kluge shouldn't cause ssh
767 * any problems for how we use it. Note also that we delayed setting
768 * this until after the above protocol setup so that we know for sure
769 * that ssh is done twiddling its file descriptors. */
770 set_blocking(STDERR_FILENO);
773 keep_dirlinks = 0; /* Must be disabled on the sender. */
774 io_start_buffering_out();
777 send_filter_list(f_out);
781 if (write_batch && !am_server)
782 start_write_batch(f_out);
783 flist = send_file_list(f_out, argc, argv);
786 rprintf(FINFO,"file list sent\n");
787 the_file_list = flist;
789 io_flush(NORMAL_FLUSH);
790 send_files(flist,f_out,f_in);
791 io_flush(FULL_FLUSH);
793 if (protocol_version >= 24)
794 read_final_goodbye(f_in, f_out);
797 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
798 io_flush(FULL_FLUSH);
799 wait_process_with_flush(pid, &exit_code);
802 io_flush(FULL_FLUSH);
803 exit_cleanup(exit_code);
806 if (need_messages_from_generator && !read_batch)
807 io_start_multiplex_out();
812 send_filter_list(read_batch ? -1 : f_out);
814 if (filesfrom_fd >= 0) {
815 io_set_filesfrom_fds(filesfrom_fd, f_out);
819 strlcpy(olddir, curr_dir, sizeof olddir);
821 pre_checksum = push_dir(argv[0]);
823 if (write_batch && !am_server)
824 start_write_batch(f_in);
825 flist = recv_file_list(f_in);
826 the_file_list = flist;
831 if (flist && flist->count > 0) {
832 local_name = get_local_name(flist, argv[0]);
834 exit_code2 = do_recv(f_in, f_out, flist, local_name);
842 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
843 io_flush(FULL_FLUSH);
844 wait_process_with_flush(pid, &exit_code);
847 return MAX(exit_code, exit_code2);
850 static int copy_argv (char *argv[])
854 for (i = 0; argv[i]; i++) {
855 if (!(argv[i] = strdup(argv[i]))) {
856 rprintf (FERROR, "out of memory at %s(%d)\n",
867 * Start a client for either type of remote connection. Work out
868 * whether the arguments request a remote shell or rsyncd connection,
869 * and call the appropriate connection function, then run_client.
871 * Calls either start_socket_client (for sockets) or do_cmd and
872 * client_run (for ssh).
874 static int start_client(int argc, char *argv[])
877 char *shell_machine = NULL;
878 char *shell_path = NULL;
879 char *shell_user = NULL;
885 /* Don't clobber argv[] so that ps(1) can still show the right
887 if ((rc = copy_argv(argv)))
890 if (!read_batch) { /* for read_batch, NO source is specified */
892 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
893 if (shell_path) { /* source is remote */
896 if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
898 "The source and destination cannot both be remote.\n");
899 exit_cleanup(RERR_SYNTAX);
902 if (filesfrom_host && *filesfrom_host
903 && strcmp(filesfrom_host, shell_machine) != 0) {
905 "--files-from hostname is not the same as the transfer hostname\n");
906 exit_cleanup(RERR_SYNTAX);
910 return start_socket_client(shell_machine,
918 } else { /* source is local, check dest arg */
921 if (argc < 1) { /* destination required */
923 exit_cleanup(RERR_SYNTAX);
926 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
927 if (shell_path && filesfrom_host && *filesfrom_host
928 && strcmp(filesfrom_host, shell_machine) != 0) {
930 "--files-from hostname is not the same as the transfer hostname\n");
931 exit_cleanup(RERR_SYNTAX);
933 if (!shell_path) { /* no hostspec found, so src & dest are local */
935 if (filesfrom_host) {
937 "--files-from cannot be remote when the transfer is local\n");
938 exit_cleanup(RERR_SYNTAX);
940 shell_machine = NULL;
941 shell_path = argv[argc];
942 } else if (rsync_port) {
944 return start_socket_client(shell_machine,
951 } else { /* read_batch */
953 shell_path = argv[argc-1];
954 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
955 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
956 exit_cleanup(RERR_SYNTAX);
961 p = strrchr(shell_machine,'@');
964 shell_user = shell_machine;
970 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
971 shell_cmd ? safe_fname(shell_cmd) : "",
972 shell_machine ? safe_fname(shell_machine) : "",
973 shell_user ? safe_fname(shell_user) : "",
974 shell_path ? safe_fname(shell_path) : "");
977 /* for remote source, only single dest arg can remain ... */
978 if (!am_sender && argc > 1) {
980 exit_cleanup(RERR_SYNTAX);
983 /* ... or no dest at all */
984 if (!am_sender && argc == 0)
987 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
990 /* if we're running an rsync server on the remote host over a
991 * remote shell command, we need to do the RSYNCD protocol first */
992 if (daemon_over_rsh) {
994 tmpret = start_inband_exchange(shell_user, shell_path,
1000 ret = client_run(f_in, f_out, pid, argc, argv);
1009 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1011 exit_cleanup(RERR_SIGNAL);
1014 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1020 _exit(RERR_PARTIAL);
1024 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1029 /* An empty waitpid() loop was put here by Tridge and we could never
1030 * get him to explain why he put it in, so rather than taking it
1031 * out we're instead saving the child exit statuses for later use.
1032 * The waitpid() loop presumably eliminates all possibility of leaving
1033 * zombie children, maybe that's why he did it. */
1034 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1035 /* save the child's exit status */
1036 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1037 if (pid_stat_table[cnt].pid == 0) {
1038 pid_stat_table[cnt].pid = pid;
1039 pid_stat_table[cnt].status = status;
1045 signal(SIGCHLD, sigchld_handler);
1050 * This routine catches signals and tries to send them to gdb.
1052 * Because it's called from inside a signal handler it ought not to
1053 * use too many library routines.
1055 * @todo Perhaps use "screen -X" instead/as well, to help people
1056 * debugging without easy access to X. Perhaps use an environment
1057 * variable, or just call a script?
1059 * @todo The /proc/ magic probably only works on Linux (and
1060 * Solaris?) Can we be more portable?
1062 #ifdef MAINTAINER_MODE
1063 const char *get_panic_action(void)
1065 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1070 return "xterm -display :0 -T Panic -n Panic "
1071 "-e gdb /proc/%d/exe %d";
1076 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1078 * This signal handler is only installed if we were configured with
1079 * --enable-maintainer-mode. Perhaps it should always be on and we
1080 * should just look at the environment variable, but I'm a bit leery
1081 * of a signal sending us into a busy loop.
1083 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1088 sprintf(cmd_buf, get_panic_action(),
1089 getpid(), getpid());
1091 /* Unless we failed to execute gdb, we allow the process to
1092 * continue. I'm not sure if that's right. */
1093 ret = system(cmd_buf);
1100 int main(int argc,char *argv[])
1103 int orig_argc = argc;
1104 char **orig_argv = argv;
1106 signal(SIGUSR1, sigusr1_handler);
1107 signal(SIGUSR2, sigusr2_handler);
1108 signal(SIGCHLD, sigchld_handler);
1109 #ifdef MAINTAINER_MODE
1110 signal(SIGSEGV, rsync_panic_handler);
1111 signal(SIGFPE, rsync_panic_handler);
1112 signal(SIGABRT, rsync_panic_handler);
1113 signal(SIGBUS, rsync_panic_handler);
1114 #endif /* def MAINTAINER_MODE */
1116 starttime = time(NULL);
1117 am_root = (MY_UID() == 0);
1119 memset(&stats, 0, sizeof(stats));
1123 exit_cleanup(RERR_SYNTAX);
1126 /* we set a 0 umask so that correct file permissions can be
1128 orig_umask = (int)umask(0);
1130 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1131 /* FIXME: We ought to call the same error-handling
1132 * code here, rather than relying on getopt. */
1134 exit_cleanup(RERR_SYNTAX);
1137 signal(SIGINT,SIGNAL_CAST sig_int);
1138 signal(SIGHUP,SIGNAL_CAST sig_int);
1139 signal(SIGTERM,SIGNAL_CAST sig_int);
1141 /* Ignore SIGPIPE; we consistently check error codes and will
1143 signal(SIGPIPE, SIG_IGN);
1145 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1146 setlocale(LC_CTYPE, "");
1149 /* Initialize push_dir here because on some old systems getcwd
1150 * (implemented by forking "pwd" and reading its output) doesn't
1151 * work when there are other child processes. Also, on all systems
1152 * that implement getcwd that way "pwd" can't be found after chroot. */
1157 if ((write_batch || read_batch) && !am_server) {
1159 write_batch_shell_file(orig_argc, orig_argv, argc);
1161 if (read_batch && strcmp(batch_name, "-") == 0)
1162 batch_fd = STDIN_FILENO;
1164 batch_fd = do_open(batch_name,
1165 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1166 : O_RDONLY, S_IRUSR | S_IWUSR);
1169 rsyserr(FERROR, errno, "Batch file %s open error",
1170 full_fname(batch_name));
1171 exit_cleanup(RERR_FILEIO);
1174 read_stream_flags(batch_fd);
1176 if (write_batch < 0)
1179 if (am_daemon && !am_server)
1180 return daemon_main();
1184 exit_cleanup(RERR_SYNTAX);
1188 set_nonblocking(STDIN_FILENO);
1189 set_nonblocking(STDOUT_FILENO);
1191 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1192 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1195 ret = start_client(argc, argv);
1197 exit_cleanup(RERR_STARTCLIENT);