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.
32 extern int am_generator;
34 extern int blocking_io;
35 extern int remove_sent_files;
36 extern int daemon_over_rsh;
37 extern int need_messages_from_generator;
39 extern int log_got_error;
41 extern int orig_umask;
42 extern int copy_links;
43 extern int keep_dirlinks;
44 extern int preserve_hard_links;
45 extern int protocol_version;
47 extern int fuzzy_basis;
48 extern int relative_paths;
49 extern int rsync_port;
51 extern int make_backups;
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 *files_from;
61 extern char *remote_filesfrom_file;
62 extern char *partial_dir;
63 extern char *basis_dir[];
64 extern char *rsync_path;
65 extern char *shell_cmd;
66 extern char *batch_name;
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 void show_malloc_stats(void);
81 /****************************************************************************
82 wait for a process to exit, calling io_flush while waiting
83 ****************************************************************************/
84 void wait_process(pid_t pid, int *status)
89 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
94 if (waited_pid == -1 && errno == ECHILD) {
95 /* status of requested child no longer available.
96 * check to see if it was processed by the sigchld_handler.
98 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
99 if (pid == pid_stat_table[cnt].pid) {
100 *status = pid_stat_table[cnt].status;
101 pid_stat_table[cnt].pid = 0;
107 /* TODO: If the child exited on a signal, then log an
108 * appropriate error message. Perhaps we should also accept a
109 * message describing the purpose of the child. Also indicate
110 * this to the caller so that thhey know something went
112 *status = WEXITSTATUS(*status);
115 /* This function gets called from all 3 processes. We want the client side
116 * to actually output the text, but the sender is the only process that has
117 * all the stats we need. So, if we're a client sender, we do the report.
118 * If we're a server sender, we write the stats on the supplied fd. If
119 * we're the client receiver we read the stats from the supplied fd and do
120 * the report. All processes might also generate a set of debug stats, if
121 * the verbose level is high enough (this is the only thing that the
122 * generator process and the server receiver ever do here). */
123 static void report(int f)
125 /* Cache two stats because the read/write code can change it. */
126 int64 total_read = stats.total_read;
127 int64 total_written = stats.total_written;
128 time_t t = time(NULL);
130 if (do_stats && verbose > 1) {
131 /* These come out from every process */
140 log_exit(0, __FILE__, __LINE__);
141 if (f == -1 || !am_sender)
147 write_longint(f, total_read);
148 write_longint(f, total_written);
149 write_longint(f, stats.total_size);
150 if (protocol_version >= 29) {
151 write_longint(f, stats.flist_buildtime);
152 write_longint(f, stats.flist_xfertime);
158 /* this is the client */
161 /* Read the first two in opposite order because the meaning of
162 * read/write swaps when switching from sender to receiver. */
163 total_written = read_longint(f);
164 total_read = read_longint(f);
165 stats.total_size = read_longint(f);
166 if (protocol_version >= 29) {
167 stats.flist_buildtime = read_longint(f);
168 stats.flist_xfertime = read_longint(f);
170 } else if (write_batch) {
171 /* The --read-batch process is going to be a client
172 * receiver, so we need to give it the stats. */
173 write_longint(batch_fd, total_read);
174 write_longint(batch_fd, total_written);
175 write_longint(batch_fd, stats.total_size);
176 if (protocol_version >= 29) {
177 write_longint(batch_fd, stats.flist_buildtime);
178 write_longint(batch_fd, stats.flist_xfertime);
183 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
184 rprintf(FINFO,"Number of files transferred: %d\n",
185 stats.num_transferred_files);
186 rprintf(FINFO,"Total file size: %.0f bytes\n",
187 (double)stats.total_size);
188 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
189 (double)stats.total_transferred_size);
190 rprintf(FINFO,"Literal data: %.0f bytes\n",
191 (double)stats.literal_data);
192 rprintf(FINFO,"Matched data: %.0f bytes\n",
193 (double)stats.matched_data);
194 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
195 if (stats.flist_buildtime) {
197 "File list generation time: %.3f seconds\n",
198 (double)stats.flist_buildtime / 1000);
200 "File list transfer time: %.3f seconds\n",
201 (double)stats.flist_xfertime / 1000);
203 rprintf(FINFO,"Total bytes sent: %.0f\n",
204 (double)total_written);
205 rprintf(FINFO,"Total bytes received: %.0f\n",
209 if (verbose || do_stats) {
211 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
212 (double)total_written, (double)total_read,
213 (total_written + total_read)/(0.5 + (t - starttime)));
214 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
215 (double)stats.total_size,
216 (double)stats.total_size / (total_written+total_read));
225 * If our C library can get malloc statistics, then show them to FINFO
227 static void show_malloc_stats(void)
234 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
235 getpid(), am_server ? "server " : "",
236 am_daemon ? "daemon " : "", who_am_i());
237 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
239 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
241 rprintf(FINFO, " smblks: %10ld\n",
243 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
245 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
247 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
248 (long)mi.arena + mi.hblkhd);
249 rprintf(FINFO, " usmblks: %10ld\n",
251 rprintf(FINFO, " fsmblks: %10ld\n",
253 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
255 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
257 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
259 #endif /* HAVE_MALLINFO */
263 /* Start the remote shell. cmd may be NULL to use the default. */
264 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
265 int *f_in, int *f_out)
268 char *args[MAX_ARGS];
270 char *tok, *dir = NULL;
273 if (!read_batch && !local_server) {
274 char *rsh_env = getenv(RSYNC_RSH_ENV);
283 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
284 /* Comparison leaves rooms for server_options(). */
285 if (argc >= MAX_ARGS - 100) {
286 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
287 exit_cleanup(RERR_SYNTAX);
292 /* check to see if we've already been given '-l user' in
293 * the remote-shell command */
294 for (i = 0; i < argc-1; i++) {
295 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
300 /* remsh (on HPUX) takes the arguments the other way around */
301 args[argc++] = machine;
302 if (user && !(daemon_over_rsh && dash_l_set)) {
307 if (user && !(daemon_over_rsh && dash_l_set)) {
311 args[argc++] = machine;
314 args[argc++] = rsync_path;
316 if (blocking_io < 0) {
318 if ((cp = strrchr(cmd, '/')) != NULL)
322 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
326 server_options(args,&argc);
328 if (argc >= MAX_ARGS - 2) {
329 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
330 exit_cleanup(RERR_SYNTAX);
336 if (!daemon_over_rsh && path && *path)
342 rprintf(FINFO,"cmd=");
343 for (i = 0; i < argc; i++)
344 rprintf(FINFO, "%s ", safe_fname(args[i]));
349 int from_gen_pipe[2];
350 if (fd_pair(from_gen_pipe) < 0) {
351 rsyserr(FERROR, errno, "pipe");
352 exit_cleanup(RERR_IPC);
354 batch_gen_fd = from_gen_pipe[0];
355 *f_out = from_gen_pipe[1];
357 ret = -1; /* no child pid */
358 } else if (local_server) {
359 /* If the user didn't request --[no-]whole-file, force
360 * it on, but only if we're not batch processing. */
361 if (whole_file < 0 && !write_batch)
363 ret = local_child(argc, args, f_in, f_out, child_main);
365 ret = piped_child(args,f_in,f_out);
373 out_of_memory("do_cmd");
374 return 0; /* not reached */
378 static char *get_local_name(struct file_list *flist,char *name)
384 rprintf(FINFO,"get_local_name count=%d %s\n",
385 flist->count, NS(name));
390 if (do_stat(name,&st) == 0) {
391 if (S_ISDIR(st.st_mode)) {
392 if (!push_dir(name)) {
393 rsyserr(FERROR, errno, "push_dir#1 %s failed",
395 exit_cleanup(RERR_FILESELECT);
399 if (flist->count > 1) {
400 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
401 exit_cleanup(RERR_FILESELECT);
406 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
409 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
410 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
411 exit_cleanup(RERR_FILEIO);
414 rprintf(FINFO, "created directory %s\n", safe_fname(name));
421 if (!push_dir(name)) {
422 rsyserr(FERROR, errno, "push_dir#2 %s failed",
424 exit_cleanup(RERR_FILESELECT);
431 static void read_final_goodbye(int f_in, int f_out, int flist_count)
433 if (protocol_version < 29) {
438 /* Handle any keep-alive messages from --delete-after processing. */
439 while (read_int(f_in) == flist_count) {
440 if (read_shortint(f_in) != ITEM_IS_NEW)
441 return; /* Complain? */
442 write_int(f_out, flist_count);
443 write_shortint(f_out, ITEM_IS_NEW);
448 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
451 struct file_list *flist;
455 rprintf(FINFO, "server_sender starting pid=%ld\n",
459 if (am_daemon && lp_write_only(module_id)) {
460 rprintf(FERROR, "ERROR: module is write only\n");
461 exit_cleanup(RERR_SYNTAX);
464 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
466 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
467 exit_cleanup(RERR_SYNTAX);
471 if (!relative_paths && !push_dir(dir)) {
472 rsyserr(FERROR, errno, "push_dir#3 %s failed",
474 exit_cleanup(RERR_FILESELECT);
479 if (strcmp(dir,".")) {
481 if (strcmp(dir,"/") == 0)
483 for (i = 0; i < argc; i++)
487 if (argc == 0 && (recurse || list_only)) {
493 flist = send_file_list(f_out,argc,argv);
494 if (!flist || flist->count == 0) {
498 io_start_buffering_in();
499 io_start_buffering_out();
501 send_files(flist,f_out,f_in);
502 io_flush(FULL_FLUSH);
504 if (protocol_version >= 24)
505 read_final_goodbye(f_in, f_out, flist->count);
506 io_flush(FULL_FLUSH);
511 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
515 int error_pipe[2], name_pipe[2];
516 BOOL need_name_pipe = (basis_dir[0] || partial_dir || fuzzy_basis
517 || (inplace && make_backups)) && !dry_run;
519 /* The receiving side mustn't obey this, or an existing symlink that
520 * points to an identical file won't be replaced by the referent. */
523 if (preserve_hard_links)
524 init_hard_links(flist);
526 if (fd_pair(error_pipe) < 0
527 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
528 rsyserr(FERROR, errno, "pipe failed in do_recv");
529 exit_cleanup(RERR_IPC);
532 io_flush(NORMAL_FLUSH);
534 if ((pid = do_fork()) == -1) {
535 rsyserr(FERROR, errno, "fork failed in do_recv");
536 exit_cleanup(RERR_IPC);
540 close(error_pipe[0]);
541 if (need_name_pipe) {
543 set_blocking(name_pipe[0]);
549 /* we can't let two processes write to the socket at one time */
550 close_multiplexing_out();
552 /* set place to send errors */
553 set_msg_fd_out(error_pipe[1]);
555 recv_files(f_in, flist, local_name, name_pipe[0]);
556 io_flush(FULL_FLUSH);
559 send_msg(MSG_DONE, "", 0);
560 io_flush(FULL_FLUSH);
562 /* Finally, we hang around until our parent kills us with a
563 * USR2 signal. If --delete-after was specified, we might get
564 * a keep-alive message over the socket, so handle that too. */
565 if (protocol_version >= 29) {
566 while (read_int(f_in) == flist->count) {
567 if (read_shortint(f_in) != ITEM_IS_NEW)
568 break; /* Complain? */
577 close_multiplexing_in();
581 close(error_pipe[1]);
582 if (need_name_pipe) {
584 set_nonblocking(name_pipe[1]);
590 io_start_buffering_out();
592 set_msg_fd_in(error_pipe[0]);
594 generate_files(f_out, flist, local_name, name_pipe[1]);
597 io_flush(FULL_FLUSH);
598 if (protocol_version >= 24) {
599 /* send a final goodbye message */
600 write_int(f_out, -1);
602 io_flush(FULL_FLUSH);
606 wait_process(pid, &status);
611 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
614 struct file_list *flist;
615 char *local_name = NULL;
617 int save_verbose = verbose;
619 if (filesfrom_fd >= 0) {
620 /* We can't mix messages with files-from data on the socket,
621 * so temporarily turn off verbose messages. */
626 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
627 argc, (long)getpid());
630 if (am_daemon && lp_read_only(module_id)) {
631 rprintf(FERROR,"ERROR: module is read only\n");
632 exit_cleanup(RERR_SYNTAX);
641 if (!am_daemon && !push_dir(dir)) {
642 rsyserr(FERROR, errno, "push_dir#4 %s failed",
644 exit_cleanup(RERR_FILESELECT);
648 io_start_buffering_in();
649 recv_filter_list(f_in);
651 if (filesfrom_fd >= 0) {
652 /* We need to send the files-from names to the sender at the
653 * same time that we receive the file-list from them, so we
654 * need the IO routines to automatically write out the names
655 * onto our f_out socket as we read the file-list. This
656 * avoids both deadlock and extra delays/buffers. */
657 io_set_filesfrom_fds(filesfrom_fd, f_out);
661 flist = recv_file_list(f_in);
662 verbose = save_verbose;
664 rprintf(FERROR,"server_recv: recv_file_list error\n");
665 exit_cleanup(RERR_FILESELECT);
669 if (strcmp(dir,".")) {
670 argv[0] += strlen(dir);
671 if (argv[0][0] == '/')
674 local_name = get_local_name(flist,argv[0]);
677 status = do_recv(f_in,f_out,flist,local_name);
678 exit_cleanup(status);
682 int child_main(int argc, char *argv[])
684 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
689 void start_server(int f_in, int f_out, int argc, char *argv[])
691 set_nonblocking(f_in);
692 set_nonblocking(f_out);
694 io_set_sock_fds(f_in, f_out);
695 setup_protocol(f_out, f_in);
697 if (protocol_version >= 23)
698 io_start_multiplex_out();
701 keep_dirlinks = 0; /* Must be disabled on the sender. */
702 if (need_messages_from_generator)
703 io_start_multiplex_in();
705 recv_filter_list(f_in);
706 do_server_sender(f_in, f_out, argc, argv);
708 do_server_recv(f_in, f_out, argc, argv);
715 * This is called once the connection has been negotiated. It is used
716 * for rsyncd, remote-shell, and local connections.
718 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
720 struct file_list *flist = NULL;
721 int status = 0, status2 = 0;
722 char *local_name = NULL;
724 cleanup_child_pid = pid;
726 set_nonblocking(f_in);
727 set_nonblocking(f_out);
730 io_set_sock_fds(f_in, f_out);
731 setup_protocol(f_out,f_in);
733 if (protocol_version >= 23 && !read_batch)
734 io_start_multiplex_in();
736 /* We set our stderr file handle to blocking because ssh might have
737 * set it to non-blocking. This can be particularly troublesome if
738 * stderr is a clone of stdout, because ssh would have set our stdout
739 * to non-blocking at the same time (which can easily cause us to lose
740 * output from our print statements). This kluge shouldn't cause ssh
741 * any problems for how we use it. Note also that we delayed setting
742 * this until after the above protocol setup so that we know for sure
743 * that ssh is done twiddling its file descriptors. */
744 set_blocking(STDERR_FILENO);
747 keep_dirlinks = 0; /* Must be disabled on the sender. */
748 io_start_buffering_out();
749 if (!remote_filesfrom_file)
751 send_filter_list(f_out);
752 if (remote_filesfrom_file)
756 start_write_batch(f_out);
757 if (!read_batch) /* don't write to pipe */
758 flist = send_file_list(f_out,argc,argv);
761 rprintf(FINFO,"file list sent\n");
763 io_flush(NORMAL_FLUSH);
764 send_files(flist,f_out,f_in);
765 io_flush(FULL_FLUSH);
766 if (protocol_version >= 24)
767 read_final_goodbye(f_in, f_out, flist->count);
770 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
771 io_flush(FULL_FLUSH);
772 wait_process(pid, &status);
775 io_flush(FULL_FLUSH);
776 exit_cleanup(status);
779 if (need_messages_from_generator && !read_batch)
780 io_start_multiplex_out();
785 send_filter_list(read_batch ? -1 : f_out);
787 if (filesfrom_fd >= 0) {
788 io_set_filesfrom_fds(filesfrom_fd, f_out);
793 start_write_batch(f_in);
794 flist = recv_file_list(f_in);
795 if (!flist || flist->count == 0) {
796 rprintf(FINFO, "client: nothing to do: "
797 "perhaps you need to specify some filenames or "
798 "the --recursive option?\n");
802 local_name = get_local_name(flist,argv[0]);
804 status2 = do_recv(f_in,f_out,flist,local_name);
808 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
809 io_flush(FULL_FLUSH);
810 wait_process(pid, &status);
813 return MAX(status, status2);
816 static int copy_argv (char *argv[])
820 for (i = 0; argv[i]; i++) {
821 if (!(argv[i] = strdup(argv[i]))) {
822 rprintf (FERROR, "out of memory at %s(%d)\n",
833 * Start a client for either type of remote connection. Work out
834 * whether the arguments request a remote shell or rsyncd connection,
835 * and call the appropriate connection function, then run_client.
837 * Calls either start_socket_client (for sockets) or do_cmd and
838 * client_run (for ssh).
840 static int start_client(int argc, char *argv[])
843 char *shell_machine = NULL;
844 char *shell_path = NULL;
845 char *shell_user = NULL;
851 /* Don't clobber argv[] so that ps(1) can still show the right
853 if ((rc = copy_argv(argv)))
856 /* rsync:// always uses rsync server over direct socket connection */
857 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
861 host = argv[0] + strlen(URL_PREFIX);
862 p = strchr(host,'/');
868 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
874 p = strchr(host, ':');
876 rsync_port = atoi(p+1);
879 return start_socket_client(host, path, argc-1, argv+1);
882 if (!read_batch) { /* for read_batch, NO source is specified */
883 p = find_colon(argv[0]);
884 if (p) { /* source is remote */
885 if (remote_filesfrom_file
886 && remote_filesfrom_file != files_from + 1
887 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
889 "--files-from hostname is not the same as the transfer hostname\n");
890 exit_cleanup(RERR_SYNTAX);
892 if (p[1] == ':') { /* double colon */
895 return start_socket_client(argv[0], p+2,
902 if (argc < 1) { /* destination required */
904 exit_cleanup(RERR_SYNTAX);
909 shell_machine = argv[0];
912 } else { /* source is local */
915 /* rsync:// destination uses rsync server over direct socket */
916 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
919 host = argv[argc-1] + strlen(URL_PREFIX);
920 p = strchr(host,'/');
926 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
932 p = strchr(host, ':');
934 rsync_port = atoi(p+1);
937 return start_socket_client(host, path, argc-1, argv);
940 p = find_colon(argv[argc-1]); /* look in dest arg */
941 if (p && remote_filesfrom_file
942 && remote_filesfrom_file != files_from + 1
943 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
945 "--files-from hostname is not the same as the transfer hostname\n");
946 exit_cleanup(RERR_SYNTAX);
948 if (!p) { /* no colon found, so src & dest are local */
950 if (remote_filesfrom_file) {
952 "--files-from cannot be remote when the transfer is local\n");
953 exit_cleanup(RERR_SYNTAX);
955 } else if (p[1] == ':') { /* double colon */
958 return start_socket_client(argv[argc-1], p+2,
967 exit_cleanup(RERR_SYNTAX);
971 shell_machine = NULL;
972 shell_path = argv[argc-1];
975 shell_machine = argv[argc-1];
980 } else { /* read_batch */
982 shell_path = argv[argc-1];
983 if (find_colon(shell_path)) {
984 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
985 exit_cleanup(RERR_SYNTAX);
990 p = strrchr(shell_machine,'@');
993 shell_user = shell_machine;
999 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1000 shell_cmd ? safe_fname(shell_cmd) : "",
1001 shell_machine ? safe_fname(shell_machine) : "",
1002 shell_user ? safe_fname(shell_user) : "",
1003 shell_path ? safe_fname(shell_path) : "");
1006 /* for remote source, only single dest arg can remain ... */
1007 if (!am_sender && argc > 1) {
1009 exit_cleanup(RERR_SYNTAX);
1012 /* ... or no dest at all */
1013 if (!am_sender && argc == 0)
1016 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1019 /* if we're running an rsync server on the remote host over a
1020 * remote shell command, we need to do the RSYNCD protocol first */
1021 if (daemon_over_rsh) {
1023 tmpret = start_inband_exchange(shell_user, shell_path,
1029 ret = client_run(f_in, f_out, pid, argc, argv);
1038 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1040 exit_cleanup(RERR_SIGNAL);
1043 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1045 if (log_got_error) _exit(RERR_PARTIAL);
1049 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1054 /* An empty waitpid() loop was put here by Tridge and we could never
1055 * get him to explain why he put it in, so rather than taking it
1056 * out we're instead saving the child exit statuses for later use.
1057 * The waitpid() loop presumably eliminates all possibility of leaving
1058 * zombie children, maybe that's why he did it.
1060 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1061 /* save the child's exit status */
1062 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1063 if (pid_stat_table[cnt].pid == 0) {
1064 pid_stat_table[cnt].pid = pid;
1065 pid_stat_table[cnt].status = status;
1075 * This routine catches signals and tries to send them to gdb.
1077 * Because it's called from inside a signal handler it ought not to
1078 * use too many library routines.
1080 * @todo Perhaps use "screen -X" instead/as well, to help people
1081 * debugging without easy access to X. Perhaps use an environment
1082 * variable, or just call a script?
1084 * @todo The /proc/ magic probably only works on Linux (and
1085 * Solaris?) Can we be more portable?
1087 #ifdef MAINTAINER_MODE
1088 const char *get_panic_action(void)
1090 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1095 return "xterm -display :0 -T Panic -n Panic "
1096 "-e gdb /proc/%d/exe %d";
1101 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1103 * This signal handler is only installed if we were configured with
1104 * --enable-maintainer-mode. Perhaps it should always be on and we
1105 * should just look at the environment variable, but I'm a bit leery
1106 * of a signal sending us into a busy loop.
1108 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1113 sprintf(cmd_buf, get_panic_action(),
1114 getpid(), getpid());
1116 /* Unless we failed to execute gdb, we allow the process to
1117 * continue. I'm not sure if that's right. */
1118 ret = system(cmd_buf);
1125 int main(int argc,char *argv[])
1128 int orig_argc = argc;
1129 char **orig_argv = argv;
1131 signal(SIGUSR1, sigusr1_handler);
1132 signal(SIGUSR2, sigusr2_handler);
1133 signal(SIGCHLD, sigchld_handler);
1134 #ifdef MAINTAINER_MODE
1135 signal(SIGSEGV, rsync_panic_handler);
1136 signal(SIGFPE, rsync_panic_handler);
1137 signal(SIGABRT, rsync_panic_handler);
1138 signal(SIGBUS, rsync_panic_handler);
1139 #endif /* def MAINTAINER_MODE */
1141 starttime = time(NULL);
1142 am_root = (MY_UID() == 0);
1144 memset(&stats, 0, sizeof(stats));
1148 exit_cleanup(RERR_SYNTAX);
1151 /* we set a 0 umask so that correct file permissions can be
1153 orig_umask = (int)umask(0);
1155 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1156 /* FIXME: We ought to call the same error-handling
1157 * code here, rather than relying on getopt. */
1159 exit_cleanup(RERR_SYNTAX);
1162 signal(SIGINT,SIGNAL_CAST sig_int);
1163 signal(SIGHUP,SIGNAL_CAST sig_int);
1164 signal(SIGTERM,SIGNAL_CAST sig_int);
1166 /* Ignore SIGPIPE; we consistently check error codes and will
1168 signal(SIGPIPE, SIG_IGN);
1170 /* Initialize push_dir here because on some old systems getcwd
1171 * (implemented by forking "pwd" and reading its output) doesn't
1172 * work when there are other child processes. Also, on all systems
1173 * that implement getcwd that way "pwd" can't be found after chroot. */
1178 if (write_batch || read_batch) {
1180 write_batch_shell_file(orig_argc, orig_argv, argc);
1182 if (read_batch && strcmp(batch_name, "-") == 0)
1183 batch_fd = STDIN_FILENO;
1185 batch_fd = do_open(batch_name,
1186 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1187 : O_RDONLY, S_IRUSR | S_IWUSR);
1190 rsyserr(FERROR, errno, "Batch file %s open error",
1191 full_fname(batch_name));
1192 exit_cleanup(RERR_FILEIO);
1195 read_stream_flags(batch_fd);
1198 if (am_daemon && !am_server)
1199 return daemon_main();
1203 exit_cleanup(RERR_SYNTAX);
1207 set_nonblocking(STDIN_FILENO);
1208 set_nonblocking(STDOUT_FILENO);
1210 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1211 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1214 ret = start_client(argc, argv);
1216 exit_cleanup(RERR_STARTCLIENT);