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 delete_before;
35 extern int daemon_over_rsh;
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;
50 extern int whole_file;
51 extern int read_batch;
52 extern int write_batch;
54 extern int batch_gen_fd;
55 extern int filesfrom_fd;
56 extern pid_t cleanup_child_pid;
57 extern char *files_from;
58 extern char *remote_filesfrom_file;
59 extern char *partial_dir;
60 extern char *basis_dir[];
61 extern char *rsync_path;
62 extern char *shell_cmd;
63 extern char *batch_name;
67 /* There's probably never more than at most 2 outstanding child processes,
68 * but set it higher, just in case. */
69 #define MAXCHILDPROCS 5
74 } pid_stat_table[MAXCHILDPROCS];
76 static void show_malloc_stats(void);
78 /****************************************************************************
79 wait for a process to exit, calling io_flush while waiting
80 ****************************************************************************/
81 void wait_process(pid_t pid, int *status)
86 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
91 if (waited_pid == -1 && errno == ECHILD) {
92 /* status of requested child no longer available.
93 * check to see if it was processed by the sigchld_handler.
95 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
96 if (pid == pid_stat_table[cnt].pid) {
97 *status = pid_stat_table[cnt].status;
98 pid_stat_table[cnt].pid = 0;
104 /* TODO: If the child exited on a signal, then log an
105 * appropriate error message. Perhaps we should also accept a
106 * message describing the purpose of the child. Also indicate
107 * this to the caller so that thhey know something went
109 *status = WEXITSTATUS(*status);
112 /* This function gets called from all 3 processes. We want the client side
113 * to actually output the text, but the sender is the only process that has
114 * all the stats we need. So, if we're a client sender, we do the report.
115 * If we're a server sender, we write the stats on the supplied fd. If
116 * we're the client receiver we read the stats from the supplied fd and do
117 * the report. All processes might also generate a set of debug stats, if
118 * the verbose level is high enough (this is the only thing that the
119 * generator process and the server receiver ever do here). */
120 static void report(int f)
122 /* Cache two stats because the read/write code can change it. */
123 int64 total_read = stats.total_read;
124 int64 total_written = stats.total_written;
125 time_t t = time(NULL);
127 if (do_stats && verbose > 1) {
128 /* These come out from every process */
137 log_exit(0, __FILE__, __LINE__);
138 if (f == -1 || !am_sender)
144 write_longint(f, total_read);
145 write_longint(f, total_written);
146 write_longint(f, stats.total_size);
147 if (protocol_version >= 29) {
148 write_longint(f, stats.flist_buildtime);
149 write_longint(f, stats.flist_xfertime);
155 /* this is the client */
158 /* Read the first two in opposite order because the meaning of
159 * read/write swaps when switching from sender to receiver. */
160 total_written = read_longint(f);
161 total_read = read_longint(f);
162 stats.total_size = read_longint(f);
163 if (protocol_version >= 29) {
164 stats.flist_buildtime = read_longint(f);
165 stats.flist_xfertime = read_longint(f);
167 } else if (write_batch) {
168 /* The --read-batch process is going to be a client
169 * receiver, so we need to give it the stats. */
170 write_longint(batch_fd, total_read);
171 write_longint(batch_fd, total_written);
172 write_longint(batch_fd, stats.total_size);
173 if (protocol_version >= 29) {
174 write_longint(batch_fd, stats.flist_buildtime);
175 write_longint(batch_fd, stats.flist_xfertime);
180 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
181 rprintf(FINFO,"Number of files transferred: %d\n",
182 stats.num_transferred_files);
183 rprintf(FINFO,"Total file size: %.0f bytes\n",
184 (double)stats.total_size);
185 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
186 (double)stats.total_transferred_size);
187 rprintf(FINFO,"Literal data: %.0f bytes\n",
188 (double)stats.literal_data);
189 rprintf(FINFO,"Matched data: %.0f bytes\n",
190 (double)stats.matched_data);
191 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
192 if (stats.flist_buildtime) {
194 "File list generation time: %.3f seconds\n",
195 (double)stats.flist_buildtime / 1000);
197 "File list transfer time: %.3f seconds\n",
198 (double)stats.flist_xfertime / 1000);
200 rprintf(FINFO,"Total bytes sent: %.0f\n",
201 (double)total_written);
202 rprintf(FINFO,"Total bytes received: %.0f\n",
206 if (verbose || do_stats) {
208 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
209 (double)total_written, (double)total_read,
210 (total_written + total_read)/(0.5 + (t - starttime)));
211 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
212 (double)stats.total_size,
213 (double)stats.total_size / (total_written+total_read));
222 * If our C library can get malloc statistics, then show them to FINFO
224 static void show_malloc_stats(void)
231 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
232 getpid(), am_server ? "server " : "",
233 am_daemon ? "daemon " : "", who_am_i());
234 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
236 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
238 rprintf(FINFO, " smblks: %10ld\n",
240 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
242 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
244 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
245 (long)mi.arena + mi.hblkhd);
246 rprintf(FINFO, " usmblks: %10ld\n",
248 rprintf(FINFO, " fsmblks: %10ld\n",
250 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
252 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
254 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
256 #endif /* HAVE_MALLINFO */
260 /* Start the remote shell. cmd may be NULL to use the default. */
261 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
262 int *f_in, int *f_out)
265 char *args[MAX_ARGS];
267 char *tok, *dir = NULL;
270 if (!read_batch && !local_server) {
271 char *rsh_env = getenv(RSYNC_RSH_ENV);
280 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
281 /* Comparison leaves rooms for server_options(). */
282 if (argc >= MAX_ARGS - 100) {
283 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
284 exit_cleanup(RERR_SYNTAX);
289 /* check to see if we've already been given '-l user' in
290 * the remote-shell command */
291 for (i = 0; i < argc-1; i++) {
292 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
297 /* remsh (on HPUX) takes the arguments the other way around */
298 args[argc++] = machine;
299 if (user && !(daemon_over_rsh && dash_l_set)) {
304 if (user && !(daemon_over_rsh && dash_l_set)) {
308 args[argc++] = machine;
311 args[argc++] = rsync_path;
313 if (blocking_io < 0) {
315 if ((cp = strrchr(cmd, '/')) != NULL)
319 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
323 server_options(args,&argc);
325 if (argc >= MAX_ARGS - 2) {
326 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
327 exit_cleanup(RERR_SYNTAX);
333 if (!daemon_over_rsh && path && *path)
339 rprintf(FINFO,"cmd=");
340 for (i = 0; i < argc; i++)
341 rprintf(FINFO, "%s ", safe_fname(args[i]));
346 int from_gen_pipe[2];
347 if (fd_pair(from_gen_pipe) < 0) {
348 rsyserr(FERROR, errno, "pipe");
349 exit_cleanup(RERR_IPC);
351 batch_gen_fd = from_gen_pipe[0];
352 *f_out = from_gen_pipe[1];
354 ret = -1; /* no child pid */
355 } else if (local_server) {
356 /* If the user didn't request --[no-]whole-file, force
357 * it on, but only if we're not batch processing. */
358 if (whole_file < 0 && !write_batch)
360 ret = local_child(argc, args, f_in, f_out, child_main);
362 ret = piped_child(args,f_in,f_out);
370 out_of_memory("do_cmd");
371 return 0; /* not reached */
375 static char *get_local_name(struct file_list *flist,char *name)
381 rprintf(FINFO,"get_local_name count=%d %s\n",
382 flist->count, NS(name));
387 if (do_stat(name,&st) == 0) {
388 if (S_ISDIR(st.st_mode)) {
389 if (!push_dir(name)) {
390 rsyserr(FERROR, errno, "push_dir#1 %s failed",
392 exit_cleanup(RERR_FILESELECT);
396 if (flist->count > 1) {
397 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
398 exit_cleanup(RERR_FILESELECT);
403 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
406 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
407 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
408 exit_cleanup(RERR_FILEIO);
411 rprintf(FINFO, "created directory %s\n", safe_fname(name));
418 if (!push_dir(name)) {
419 rsyserr(FERROR, errno, "push_dir#2 %s failed",
421 exit_cleanup(RERR_FILESELECT);
428 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
431 struct file_list *flist;
435 rprintf(FINFO, "server_sender starting pid=%ld\n",
439 if (am_daemon && lp_write_only(module_id)) {
440 rprintf(FERROR, "ERROR: module is write only\n");
441 exit_cleanup(RERR_SYNTAX);
445 if (!relative_paths && !push_dir(dir)) {
446 rsyserr(FERROR, errno, "push_dir#3 %s failed",
448 exit_cleanup(RERR_FILESELECT);
453 if (strcmp(dir,".")) {
455 if (strcmp(dir,"/") == 0)
457 for (i = 0; i < argc; i++)
461 if (argc == 0 && (recurse || list_only)) {
467 flist = send_file_list(f_out,argc,argv);
468 if (!flist || flist->count == 0) {
472 io_start_buffering_in();
473 io_start_buffering_out();
475 send_files(flist,f_out,f_in);
476 io_flush(FULL_FLUSH);
478 if (protocol_version >= 24) {
479 /* final goodbye message */
482 io_flush(FULL_FLUSH);
487 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
491 int error_pipe[2], name_pipe[2];
492 BOOL need_name_pipe = (basis_dir[0] || partial_dir || fuzzy_basis)
495 /* The receiving side mustn't obey this, or an existing symlink that
496 * points to an identical file won't be replaced by the referent. */
499 if (preserve_hard_links)
500 init_hard_links(flist);
502 if (delete_before && !local_name && flist->count > 0) {
503 /* Moved here from recv_files() to prevent a race condition */
507 if (fd_pair(error_pipe) < 0
508 || (need_name_pipe && fd_pair(name_pipe) < 0)) {
509 rsyserr(FERROR, errno, "pipe failed in do_recv");
510 exit_cleanup(RERR_IPC);
513 io_flush(NORMAL_FLUSH);
515 if ((pid = do_fork()) == -1) {
516 rsyserr(FERROR, errno, "fork failed in do_recv");
517 exit_cleanup(RERR_IPC);
521 close(error_pipe[0]);
522 if (need_name_pipe) {
524 set_blocking(name_pipe[0]);
530 /* we can't let two processes write to the socket at one time */
531 close_multiplexing_out();
533 /* set place to send errors */
534 set_msg_fd_out(error_pipe[1]);
536 recv_files(f_in, flist, local_name, name_pipe[0]);
537 io_flush(FULL_FLUSH);
540 send_msg(MSG_DONE, "", 0);
541 io_flush(FULL_FLUSH);
542 /* finally we go to sleep until our parent kills us
543 * with a USR2 signal. We sleep for a short time as on
544 * some OSes a signal won't interrupt a sleep! */
550 close_multiplexing_in();
554 close(error_pipe[1]);
555 if (need_name_pipe) {
557 set_nonblocking(name_pipe[1]);
563 io_start_buffering_out();
565 set_msg_fd_in(error_pipe[0]);
567 generate_files(f_out, flist, local_name, name_pipe[1]);
570 io_flush(FULL_FLUSH);
571 if (protocol_version >= 24) {
572 /* send a final goodbye message */
573 write_int(f_out, -1);
575 io_flush(FULL_FLUSH);
579 wait_process(pid, &status);
584 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
587 struct file_list *flist;
588 char *local_name = NULL;
590 int save_verbose = verbose;
592 if (filesfrom_fd >= 0) {
593 /* We can't mix messages with files-from data on the socket,
594 * so temporarily turn off verbose messages. */
599 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
600 argc, (long)getpid());
603 if (am_daemon && lp_read_only(module_id)) {
604 rprintf(FERROR,"ERROR: module is read only\n");
605 exit_cleanup(RERR_SYNTAX);
614 if (!am_daemon && !push_dir(dir)) {
615 rsyserr(FERROR, errno, "push_dir#4 %s failed",
617 exit_cleanup(RERR_FILESELECT);
621 io_start_buffering_in();
622 recv_filter_list(f_in);
624 if (filesfrom_fd >= 0) {
625 /* We need to send the files-from names to the sender at the
626 * same time that we receive the file-list from them, so we
627 * need the IO routines to automatically write out the names
628 * onto our f_out socket as we read the file-list. This
629 * avoids both deadlock and extra delays/buffers. */
630 io_set_filesfrom_fds(filesfrom_fd, f_out);
634 flist = recv_file_list(f_in);
635 verbose = save_verbose;
637 rprintf(FERROR,"server_recv: recv_file_list error\n");
638 exit_cleanup(RERR_FILESELECT);
642 if (strcmp(dir,".")) {
643 argv[0] += strlen(dir);
644 if (argv[0][0] == '/')
647 local_name = get_local_name(flist,argv[0]);
650 status = do_recv(f_in,f_out,flist,local_name);
651 exit_cleanup(status);
655 int child_main(int argc, char *argv[])
657 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
662 void start_server(int f_in, int f_out, int argc, char *argv[])
664 set_nonblocking(f_in);
665 set_nonblocking(f_out);
667 io_set_sock_fds(f_in, f_out);
668 setup_protocol(f_out, f_in);
670 if (protocol_version >= 23)
671 io_start_multiplex_out();
674 keep_dirlinks = 0; /* Must be disabled on the sender. */
676 recv_filter_list(f_in);
677 do_server_sender(f_in, f_out, argc, argv);
679 do_server_recv(f_in, f_out, argc, argv);
686 * This is called once the connection has been negotiated. It is used
687 * for rsyncd, remote-shell, and local connections.
689 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
691 struct file_list *flist = NULL;
692 int status = 0, status2 = 0;
693 char *local_name = NULL;
695 cleanup_child_pid = pid;
697 set_nonblocking(f_in);
698 set_nonblocking(f_out);
701 io_set_sock_fds(f_in, f_out);
702 setup_protocol(f_out,f_in);
704 if (protocol_version >= 23 && !read_batch)
705 io_start_multiplex_in();
707 /* We set our stderr file handle to blocking because ssh might have
708 * set it to non-blocking. This can be particularly troublesome if
709 * stderr is a clone of stdout, because ssh would have set our stdout
710 * to non-blocking at the same time (which can easily cause us to lose
711 * output from our print statements). This kluge shouldn't cause ssh
712 * any problems for how we use it. Note also that we delayed setting
713 * this until after the above protocol setup so that we know for sure
714 * that ssh is done twiddling its file descriptors. */
715 set_blocking(STDERR_FILENO);
718 keep_dirlinks = 0; /* Must be disabled on the sender. */
719 io_start_buffering_out();
720 if (!remote_filesfrom_file)
722 send_filter_list(f_out);
723 if (remote_filesfrom_file)
727 start_write_batch(f_out);
728 if (!read_batch) /* don't write to pipe */
729 flist = send_file_list(f_out,argc,argv);
732 rprintf(FINFO,"file list sent\n");
734 io_flush(NORMAL_FLUSH);
735 send_files(flist,f_out,f_in);
736 io_flush(FULL_FLUSH);
737 if (protocol_version >= 24) {
738 /* final goodbye message */
743 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
744 io_flush(FULL_FLUSH);
745 wait_process(pid, &status);
748 io_flush(FULL_FLUSH);
749 exit_cleanup(status);
755 send_filter_list(read_batch ? -1 : f_out);
757 if (filesfrom_fd >= 0) {
758 io_set_filesfrom_fds(filesfrom_fd, f_out);
763 start_write_batch(f_in);
764 flist = recv_file_list(f_in);
765 if (!flist || flist->count == 0) {
766 rprintf(FINFO, "client: nothing to do: "
767 "perhaps you need to specify some filenames or "
768 "the --recursive option?\n");
772 local_name = get_local_name(flist,argv[0]);
774 status2 = do_recv(f_in,f_out,flist,local_name);
778 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
779 io_flush(FULL_FLUSH);
780 wait_process(pid, &status);
783 return MAX(status, status2);
786 static int copy_argv (char *argv[])
790 for (i = 0; argv[i]; i++) {
791 if (!(argv[i] = strdup(argv[i]))) {
792 rprintf (FERROR, "out of memory at %s(%d)\n",
803 * Start a client for either type of remote connection. Work out
804 * whether the arguments request a remote shell or rsyncd connection,
805 * and call the appropriate connection function, then run_client.
807 * Calls either start_socket_client (for sockets) or do_cmd and
808 * client_run (for ssh).
810 static int start_client(int argc, char *argv[])
813 char *shell_machine = NULL;
814 char *shell_path = NULL;
815 char *shell_user = NULL;
821 /* Don't clobber argv[] so that ps(1) can still show the right
823 if ((rc = copy_argv(argv)))
826 /* rsync:// always uses rsync server over direct socket connection */
827 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
831 host = argv[0] + strlen(URL_PREFIX);
832 p = strchr(host,'/');
838 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
844 p = strchr(host, ':');
846 rsync_port = atoi(p+1);
849 return start_socket_client(host, path, argc-1, argv+1);
852 if (!read_batch) { /* for read_batch, NO source is specified */
853 p = find_colon(argv[0]);
854 if (p) { /* source is remote */
855 if (remote_filesfrom_file
856 && remote_filesfrom_file != files_from + 1
857 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
859 "--files-from hostname is not the same as the transfer hostname\n");
860 exit_cleanup(RERR_SYNTAX);
862 if (p[1] == ':') { /* double colon */
865 return start_socket_client(argv[0], p+2,
872 if (argc < 1) { /* destination required */
874 exit_cleanup(RERR_SYNTAX);
879 shell_machine = argv[0];
882 } else { /* source is local */
885 /* rsync:// destination uses rsync server over direct socket */
886 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
889 host = argv[argc-1] + strlen(URL_PREFIX);
890 p = strchr(host,'/');
896 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
902 p = strchr(host, ':');
904 rsync_port = atoi(p+1);
907 return start_socket_client(host, path, argc-1, argv);
910 p = find_colon(argv[argc-1]); /* look in dest arg */
911 if (p && remote_filesfrom_file
912 && remote_filesfrom_file != files_from + 1
913 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
915 "--files-from hostname is not the same as the transfer hostname\n");
916 exit_cleanup(RERR_SYNTAX);
918 if (!p) { /* no colon found, so src & dest are local */
920 if (remote_filesfrom_file) {
922 "--files-from cannot be remote when the transfer is local\n");
923 exit_cleanup(RERR_SYNTAX);
925 } else if (p[1] == ':') { /* double colon */
928 return start_socket_client(argv[argc-1], p+2,
937 exit_cleanup(RERR_SYNTAX);
941 shell_machine = NULL;
942 shell_path = argv[argc-1];
945 shell_machine = argv[argc-1];
950 } else { /* read_batch */
952 shell_path = argv[argc-1];
953 if (find_colon(shell_path)) {
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))
1015 if (log_got_error) _exit(RERR_PARTIAL);
1019 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1024 /* An empty waitpid() loop was put here by Tridge and we could never
1025 * get him to explain why he put it in, so rather than taking it
1026 * out we're instead saving the child exit statuses for later use.
1027 * The waitpid() loop presumably eliminates all possibility of leaving
1028 * zombie children, maybe that's why he did it.
1030 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1031 /* save the child's exit status */
1032 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1033 if (pid_stat_table[cnt].pid == 0) {
1034 pid_stat_table[cnt].pid = pid;
1035 pid_stat_table[cnt].status = status;
1045 * This routine catches signals and tries to send them to gdb.
1047 * Because it's called from inside a signal handler it ought not to
1048 * use too many library routines.
1050 * @todo Perhaps use "screen -X" instead/as well, to help people
1051 * debugging without easy access to X. Perhaps use an environment
1052 * variable, or just call a script?
1054 * @todo The /proc/ magic probably only works on Linux (and
1055 * Solaris?) Can we be more portable?
1057 #ifdef MAINTAINER_MODE
1058 const char *get_panic_action(void)
1060 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1065 return "xterm -display :0 -T Panic -n Panic "
1066 "-e gdb /proc/%d/exe %d";
1071 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1073 * This signal handler is only installed if we were configured with
1074 * --enable-maintainer-mode. Perhaps it should always be on and we
1075 * should just look at the environment variable, but I'm a bit leery
1076 * of a signal sending us into a busy loop.
1078 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1083 sprintf(cmd_buf, get_panic_action(),
1084 getpid(), getpid());
1086 /* Unless we failed to execute gdb, we allow the process to
1087 * continue. I'm not sure if that's right. */
1088 ret = system(cmd_buf);
1095 int main(int argc,char *argv[])
1098 int orig_argc = argc;
1099 char **orig_argv = argv;
1101 signal(SIGUSR1, sigusr1_handler);
1102 signal(SIGUSR2, sigusr2_handler);
1103 signal(SIGCHLD, sigchld_handler);
1104 #ifdef MAINTAINER_MODE
1105 signal(SIGSEGV, rsync_panic_handler);
1106 signal(SIGFPE, rsync_panic_handler);
1107 signal(SIGABRT, rsync_panic_handler);
1108 signal(SIGBUS, rsync_panic_handler);
1109 #endif /* def MAINTAINER_MODE */
1111 starttime = time(NULL);
1112 am_root = (MY_UID() == 0);
1114 memset(&stats, 0, sizeof(stats));
1118 exit_cleanup(RERR_SYNTAX);
1121 /* we set a 0 umask so that correct file permissions can be
1123 orig_umask = (int)umask(0);
1125 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1126 /* FIXME: We ought to call the same error-handling
1127 * code here, rather than relying on getopt. */
1129 exit_cleanup(RERR_SYNTAX);
1132 signal(SIGINT,SIGNAL_CAST sig_int);
1133 signal(SIGHUP,SIGNAL_CAST sig_int);
1134 signal(SIGTERM,SIGNAL_CAST sig_int);
1136 /* Ignore SIGPIPE; we consistently check error codes and will
1138 signal(SIGPIPE, SIG_IGN);
1140 /* Initialize push_dir here because on some old systems getcwd
1141 * (implemented by forking "pwd" and reading its output) doesn't
1142 * work when there are other child processes. Also, on all systems
1143 * that implement getcwd that way "pwd" can't be found after chroot. */
1148 if (write_batch || read_batch) {
1150 write_batch_shell_file(orig_argc, orig_argv, argc);
1152 if (read_batch && strcmp(batch_name, "-") == 0)
1153 batch_fd = STDIN_FILENO;
1155 batch_fd = do_open(batch_name,
1156 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1157 : O_RDONLY, S_IRUSR | S_IWUSR);
1160 rsyserr(FERROR, errno, "Batch file %s open error",
1161 full_fname(batch_name));
1162 exit_cleanup(RERR_FILEIO);
1165 read_stream_flags(batch_fd);
1168 if (am_daemon && !am_server)
1169 return daemon_main();
1173 exit_cleanup(RERR_SYNTAX);
1177 set_nonblocking(STDIN_FILENO);
1178 set_nonblocking(STDOUT_FILENO);
1180 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1181 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1184 ret = start_client(argc, argv);
1186 exit_cleanup(RERR_STARTCLIENT);