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.
26 extern struct stats stats;
30 extern int am_generator;
33 extern int blocking_io;
34 extern int cvs_exclude;
35 extern int delete_mode;
36 extern int delete_before;
37 extern int delete_after;
38 extern int delete_excluded;
39 extern int daemon_over_rsh;
43 extern int local_server;
44 extern int log_got_error;
46 extern int orig_umask;
47 extern int copy_links;
48 extern int keep_dirlinks;
49 extern int preserve_hard_links;
50 extern int protocol_version;
52 extern int relative_paths;
53 extern int rsync_port;
54 extern int whole_file;
55 extern int read_batch;
56 extern int write_batch;
58 extern int batch_gen_fd;
59 extern int filesfrom_fd;
60 extern pid_t cleanup_child_pid;
61 extern char *files_from;
62 extern char *remote_filesfrom_file;
63 extern char *partial_dir;
64 extern char *basis_dir[];
65 extern char *rsync_path;
66 extern char *shell_cmd;
67 extern char *batch_name;
68 extern struct filter_list_struct filter_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 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 ",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", name);
421 if (!push_dir(name)) {
422 rsyserr(FERROR, errno, "push_dir#2 %s failed",
424 exit_cleanup(RERR_FILESELECT);
431 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
434 struct file_list *flist;
438 rprintf(FINFO, "server_sender starting pid=%ld\n",
442 if (am_daemon && lp_write_only(module_id)) {
443 rprintf(FERROR, "ERROR: module is write only\n");
444 exit_cleanup(RERR_SYNTAX);
448 if (!relative_paths && !push_dir(dir)) {
449 rsyserr(FERROR, errno, "push_dir#3 %s failed",
451 exit_cleanup(RERR_FILESELECT);
456 if (strcmp(dir,".")) {
458 if (strcmp(dir,"/") == 0)
460 for (i = 0; i < argc; i++)
464 if (argc == 0 && (recurse || list_only)) {
470 flist = send_file_list(f_out,argc,argv);
471 if (!flist || flist->count == 0) {
475 io_start_buffering_in();
476 io_start_buffering_out();
478 send_files(flist,f_out,f_in);
479 io_flush(FULL_FLUSH);
481 if (protocol_version >= 24) {
482 /* final goodbye message */
485 io_flush(FULL_FLUSH);
490 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
494 int error_pipe[2], name_pipe[2];
495 BOOL need_name_pipe = (basis_dir[0] || partial_dir) && !dry_run;
497 /* The receiving side mustn't obey this, or an existing symlink that
498 * points to an identical file won't be replaced by the referent. */
501 if (preserve_hard_links)
502 init_hard_links(flist);
505 /* I moved this here from recv_files() to prevent a race condition */
506 if (recurse && !local_name && flist->count > 0)
510 if (fd_pair(error_pipe) < 0
511 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
512 rsyserr(FERROR, errno, "pipe failed in do_recv");
513 exit_cleanup(RERR_IPC);
516 io_flush(NORMAL_FLUSH);
518 if ((pid = do_fork()) == -1) {
519 rsyserr(FERROR, errno, "fork failed in do_recv");
520 exit_cleanup(RERR_IPC);
524 close(error_pipe[0]);
525 if (need_name_pipe) {
527 set_blocking(name_pipe[0]);
533 /* we can't let two processes write to the socket at one time */
534 close_multiplexing_out();
536 /* set place to send errors */
537 set_msg_fd_out(error_pipe[1]);
539 recv_files(f_in, flist, local_name, name_pipe[0]);
540 io_flush(FULL_FLUSH);
543 send_msg(MSG_DONE, "", 0);
544 io_flush(FULL_FLUSH);
545 /* finally we go to sleep until our parent kills us
546 * with a USR2 signal. We sleep for a short time as on
547 * some OSes a signal won't interrupt a sleep! */
553 close_multiplexing_in();
557 close(error_pipe[1]);
558 if (need_name_pipe) {
560 set_nonblocking(name_pipe[1]);
566 io_start_buffering_out();
568 set_msg_fd_in(error_pipe[0]);
570 generate_files(f_out, flist, local_name, name_pipe[1]);
573 io_flush(FULL_FLUSH);
574 if (protocol_version >= 24) {
575 /* send a final goodbye message */
576 write_int(f_out, -1);
578 io_flush(FULL_FLUSH);
582 wait_process(pid, &status);
587 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
590 struct file_list *flist;
591 char *local_name = NULL;
593 int save_verbose = verbose;
595 if (filesfrom_fd >= 0) {
596 /* We can't mix messages with files-from data on the socket,
597 * so temporarily turn off verbose messages. */
602 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
603 argc, (long)getpid());
606 if (am_daemon && lp_read_only(module_id)) {
607 rprintf(FERROR,"ERROR: module is read only\n");
608 exit_cleanup(RERR_SYNTAX);
617 if (!am_daemon && !push_dir(dir)) {
618 rsyserr(FERROR, errno, "push_dir#4 %s failed",
620 exit_cleanup(RERR_FILESELECT);
624 io_start_buffering_in();
625 if (delete_mode && !delete_excluded)
626 recv_filter_list(f_in);
627 if (cvs_exclude && protocol_version < 29)
628 add_filter(&filter_list, ":C", 0);
630 if (filesfrom_fd >= 0) {
631 /* We need to send the files-from names to the sender at the
632 * same time that we receive the file-list from them, so we
633 * need the IO routines to automatically write out the names
634 * onto our f_out socket as we read the file-list. This
635 * avoids both deadlock and extra delays/buffers. */
636 io_set_filesfrom_fds(filesfrom_fd, f_out);
640 flist = recv_file_list(f_in);
641 verbose = save_verbose;
643 rprintf(FERROR,"server_recv: recv_file_list error\n");
644 exit_cleanup(RERR_FILESELECT);
648 if (strcmp(dir,".")) {
649 argv[0] += strlen(dir);
650 if (argv[0][0] == '/')
653 local_name = get_local_name(flist,argv[0]);
656 status = do_recv(f_in,f_out,flist,local_name);
657 exit_cleanup(status);
661 int child_main(int argc, char *argv[])
663 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
668 void start_server(int f_in, int f_out, int argc, char *argv[])
670 set_nonblocking(f_in);
671 set_nonblocking(f_out);
673 io_set_sock_fds(f_in, f_out);
674 setup_protocol(f_out, f_in);
676 if (protocol_version >= 23)
677 io_start_multiplex_out();
680 keep_dirlinks = 0; /* Must be disabled on the sender. */
682 recv_filter_list(f_in);
685 do_server_sender(f_in, f_out, argc, argv);
687 do_server_recv(f_in, f_out, argc, argv);
694 * This is called once the connection has been negotiated. It is used
695 * for rsyncd, remote-shell, and local connections.
697 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
699 struct file_list *flist = NULL;
700 int status = 0, status2 = 0;
701 char *local_name = NULL;
703 cleanup_child_pid = pid;
705 set_nonblocking(f_in);
706 set_nonblocking(f_out);
709 io_set_sock_fds(f_in, f_out);
710 setup_protocol(f_out,f_in);
712 if (protocol_version >= 23 && !read_batch)
713 io_start_multiplex_in();
715 /* We set our stderr file handle to blocking because ssh might have
716 * set it to non-blocking. This can be particularly troublesome if
717 * stderr is a clone of stdout, because ssh would have set our stdout
718 * to non-blocking at the same time (which can easily cause us to lose
719 * output from our print statements). This kluge shouldn't cause ssh
720 * any problems for how we use it. Note also that we delayed setting
721 * this until after the above protocol setup so that we know for sure
722 * that ssh is done twiddling its file descriptors. */
723 set_blocking(STDERR_FILENO);
726 keep_dirlinks = 0; /* Must be disabled on the sender. */
727 io_start_buffering_out();
728 if (!remote_filesfrom_file)
732 if (delete_mode && !delete_excluded)
733 send_filter_list(f_out);
734 if (remote_filesfrom_file)
738 start_write_batch(f_out);
739 if (!read_batch) /* don't write to pipe */
740 flist = send_file_list(f_out,argc,argv);
743 rprintf(FINFO,"file list sent\n");
745 io_flush(NORMAL_FLUSH);
746 send_files(flist,f_out,f_in);
747 io_flush(FULL_FLUSH);
748 if (protocol_version >= 24) {
749 /* final goodbye message */
754 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
755 io_flush(FULL_FLUSH);
756 wait_process(pid, &status);
759 io_flush(FULL_FLUSH);
760 exit_cleanup(status);
767 send_filter_list(f_out);
771 if (filesfrom_fd >= 0) {
772 io_set_filesfrom_fds(filesfrom_fd, f_out);
777 start_write_batch(f_in);
778 flist = recv_file_list(f_in);
779 if (!flist || flist->count == 0) {
780 rprintf(FINFO, "client: nothing to do: "
781 "perhaps you need to specify some filenames or "
782 "the --recursive option?\n");
786 local_name = get_local_name(flist,argv[0]);
788 status2 = do_recv(f_in,f_out,flist,local_name);
792 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
793 io_flush(FULL_FLUSH);
794 wait_process(pid, &status);
797 return MAX(status, status2);
800 static int copy_argv (char *argv[])
804 for (i = 0; argv[i]; i++) {
805 if (!(argv[i] = strdup(argv[i]))) {
806 rprintf (FERROR, "out of memory at %s(%d)\n",
817 * Start a client for either type of remote connection. Work out
818 * whether the arguments request a remote shell or rsyncd connection,
819 * and call the appropriate connection function, then run_client.
821 * Calls either start_socket_client (for sockets) or do_cmd and
822 * client_run (for ssh).
824 static int start_client(int argc, char *argv[])
827 char *shell_machine = NULL;
828 char *shell_path = NULL;
829 char *shell_user = NULL;
835 /* Don't clobber argv[] so that ps(1) can still show the right
837 if ((rc = copy_argv(argv)))
840 /* rsync:// always uses rsync server over direct socket connection */
841 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
845 host = argv[0] + strlen(URL_PREFIX);
846 p = strchr(host,'/');
852 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
858 p = strchr(host, ':');
860 rsync_port = atoi(p+1);
863 return start_socket_client(host, path, argc-1, argv+1);
866 if (!read_batch) { /* for read_batch, NO source is specified */
867 p = find_colon(argv[0]);
868 if (p) { /* source is remote */
869 if (remote_filesfrom_file
870 && remote_filesfrom_file != files_from + 1
871 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
873 "--files-from hostname is not the same as the transfer hostname\n");
874 exit_cleanup(RERR_SYNTAX);
876 if (p[1] == ':') { /* double colon */
879 return start_socket_client(argv[0], p+2,
886 if (argc < 1) { /* destination required */
888 exit_cleanup(RERR_SYNTAX);
893 shell_machine = argv[0];
896 } else { /* source is local */
899 /* rsync:// destination uses rsync server over direct socket */
900 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
903 host = argv[argc-1] + strlen(URL_PREFIX);
904 p = strchr(host,'/');
910 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
916 p = strchr(host, ':');
918 rsync_port = atoi(p+1);
921 return start_socket_client(host, path, argc-1, argv);
924 p = find_colon(argv[argc-1]); /* look in dest arg */
925 if (p && remote_filesfrom_file
926 && remote_filesfrom_file != files_from + 1
927 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
929 "--files-from hostname is not the same as the transfer hostname\n");
930 exit_cleanup(RERR_SYNTAX);
932 if (!p) { /* no colon found, so src & dest are local */
934 if (remote_filesfrom_file) {
936 "--files-from cannot be remote when the transfer is local\n");
937 exit_cleanup(RERR_SYNTAX);
939 } else if (p[1] == ':') { /* double colon */
942 return start_socket_client(argv[argc-1], p+2,
951 exit_cleanup(RERR_SYNTAX);
955 shell_machine = NULL;
956 shell_path = argv[argc-1];
959 shell_machine = argv[argc-1];
964 } else { /* read_batch */
966 shell_path = argv[argc-1];
967 if (find_colon(shell_path)) {
968 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
969 exit_cleanup(RERR_SYNTAX);
974 p = strrchr(shell_machine,'@');
977 shell_user = shell_machine;
983 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
984 shell_cmd?shell_cmd:"",
985 shell_machine?shell_machine:"",
986 shell_user?shell_user:"",
987 shell_path?shell_path:"");
990 /* for remote source, only single dest arg can remain ... */
991 if (!am_sender && argc > 1) {
993 exit_cleanup(RERR_SYNTAX);
996 /* ... or no dest at all */
997 if (!am_sender && argc == 0)
1000 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1003 /* if we're running an rsync server on the remote host over a
1004 * remote shell command, we need to do the RSYNCD protocol first */
1005 if (daemon_over_rsh) {
1007 tmpret = start_inband_exchange(shell_user, shell_path,
1013 ret = client_run(f_in, f_out, pid, argc, argv);
1022 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1024 exit_cleanup(RERR_SIGNAL);
1027 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1029 if (log_got_error) _exit(RERR_PARTIAL);
1033 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1038 /* An empty waitpid() loop was put here by Tridge and we could never
1039 * get him to explain why he put it in, so rather than taking it
1040 * out we're instead saving the child exit statuses for later use.
1041 * The waitpid() loop presumably eliminates all possibility of leaving
1042 * zombie children, maybe that's why he did it.
1044 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1045 /* save the child's exit status */
1046 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1047 if (pid_stat_table[cnt].pid == 0) {
1048 pid_stat_table[cnt].pid = pid;
1049 pid_stat_table[cnt].status = status;
1059 * This routine catches signals and tries to send them to gdb.
1061 * Because it's called from inside a signal handler it ought not to
1062 * use too many library routines.
1064 * @todo Perhaps use "screen -X" instead/as well, to help people
1065 * debugging without easy access to X. Perhaps use an environment
1066 * variable, or just call a script?
1068 * @todo The /proc/ magic probably only works on Linux (and
1069 * Solaris?) Can we be more portable?
1071 #ifdef MAINTAINER_MODE
1072 const char *get_panic_action(void)
1074 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1079 return "xterm -display :0 -T Panic -n Panic "
1080 "-e gdb /proc/%d/exe %d";
1085 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1087 * This signal handler is only installed if we were configured with
1088 * --enable-maintainer-mode. Perhaps it should always be on and we
1089 * should just look at the environment variable, but I'm a bit leery
1090 * of a signal sending us into a busy loop.
1092 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1097 sprintf(cmd_buf, get_panic_action(),
1098 getpid(), getpid());
1100 /* Unless we failed to execute gdb, we allow the process to
1101 * continue. I'm not sure if that's right. */
1102 ret = system(cmd_buf);
1109 int main(int argc,char *argv[])
1112 int orig_argc = argc;
1113 char **orig_argv = argv;
1115 signal(SIGUSR1, sigusr1_handler);
1116 signal(SIGUSR2, sigusr2_handler);
1117 signal(SIGCHLD, sigchld_handler);
1118 #ifdef MAINTAINER_MODE
1119 signal(SIGSEGV, rsync_panic_handler);
1120 signal(SIGFPE, rsync_panic_handler);
1121 signal(SIGABRT, rsync_panic_handler);
1122 signal(SIGBUS, rsync_panic_handler);
1123 #endif /* def MAINTAINER_MODE */
1125 starttime = time(NULL);
1126 am_root = (MY_UID() == 0);
1128 memset(&stats, 0, sizeof(stats));
1132 exit_cleanup(RERR_SYNTAX);
1135 /* we set a 0 umask so that correct file permissions can be
1137 orig_umask = (int)umask(0);
1139 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1140 /* FIXME: We ought to call the same error-handling
1141 * code here, rather than relying on getopt. */
1143 exit_cleanup(RERR_SYNTAX);
1146 signal(SIGINT,SIGNAL_CAST sig_int);
1147 signal(SIGHUP,SIGNAL_CAST sig_int);
1148 signal(SIGTERM,SIGNAL_CAST sig_int);
1150 /* Ignore SIGPIPE; we consistently check error codes and will
1152 signal(SIGPIPE, SIG_IGN);
1154 /* Initialize push_dir here because on some old systems getcwd
1155 * (implemented by forking "pwd" and reading its output) doesn't
1156 * work when there are other child processes. Also, on all systems
1157 * that implement getcwd that way "pwd" can't be found after chroot. */
1162 if (write_batch || read_batch) {
1164 write_batch_shell_file(orig_argc, orig_argv, argc);
1166 if (read_batch && strcmp(batch_name, "-") == 0)
1167 batch_fd = STDIN_FILENO;
1169 batch_fd = do_open(batch_name,
1170 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1171 : O_RDONLY, S_IRUSR | S_IWUSR);
1174 rsyserr(FERROR, errno, "Batch file %s open error",
1176 exit_cleanup(RERR_FILEIO);
1179 read_stream_flags(batch_fd);
1182 if (am_daemon && !am_server)
1183 return daemon_main();
1187 exit_cleanup(RERR_SYNTAX);
1191 verbose = MAX(verbose,1);
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);