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_excluded;
37 extern int delete_after;
38 extern int daemon_over_rsh;
42 extern int local_server;
43 extern int log_got_error;
45 extern int orig_umask;
46 extern int copy_links;
47 extern int keep_dirlinks;
48 extern int preserve_hard_links;
49 extern int protocol_version;
51 extern int relative_paths;
52 extern int rsync_port;
53 extern int whole_file;
54 extern int read_batch;
55 extern int write_batch;
57 extern int batch_gen_fd;
58 extern int filesfrom_fd;
59 extern pid_t cleanup_child_pid;
60 extern char *files_from;
61 extern char *remote_filesfrom_file;
62 extern char *rsync_path;
63 extern char *shell_cmd;
64 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.
70 #define MAXCHILDPROCS 5
75 } pid_stat_table[MAXCHILDPROCS];
77 static void show_malloc_stats(void);
79 /****************************************************************************
80 wait for a process to exit, calling io_flush while waiting
81 ****************************************************************************/
82 void wait_process(pid_t pid, int *status)
87 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
92 if (waited_pid == -1 && errno == ECHILD) {
93 /* status of requested child no longer available.
94 * check to see if it was processed by the sigchld_handler.
96 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
97 if (pid == pid_stat_table[cnt].pid) {
98 *status = pid_stat_table[cnt].status;
99 pid_stat_table[cnt].pid = 0;
105 /* TODO: If the child exited on a signal, then log an
106 * appropriate error message. Perhaps we should also accept a
107 * message describing the purpose of the child. Also indicate
108 * this to the caller so that thhey know something went
110 *status = WEXITSTATUS(*status);
113 /* This function gets called from all 3 processes. We want the client side
114 * to actually output the text, but the sender is the only process that has
115 * all the stats we need. So, if we're a client sender, we do the report.
116 * If we're a server sender, we write the stats on the supplied fd. If
117 * we're the client receiver we read the stats from the supplied fd and do
118 * the report. All processes might also generate a set of debug stats, if
119 * the verbose level is high enough (this is the only thing that the
120 * generator process and the server receiver ever do here). */
121 static void report(int f)
123 /* Cache two stats because the read/write code can change it. */
124 int64 total_read = stats.total_read;
125 int64 total_written = stats.total_written;
126 time_t t = time(NULL);
128 if (do_stats && verbose > 1) {
129 /* These come out from every process */
138 log_exit(0, __FILE__, __LINE__);
139 if (f == -1 || !am_sender)
145 write_longint(f, total_read);
146 write_longint(f, total_written);
147 write_longint(f, stats.total_size);
152 /* this is the client */
155 /* Read the first two in opposite order because the meaning of
156 * read/write swaps when switching from sender to receiver. */
157 total_written = read_longint(f);
158 total_read = read_longint(f);
159 stats.total_size = read_longint(f);
160 } else if (write_batch) {
161 /* The --read-batch process is going to be a client
162 * receiver, so we need to give it the stats. */
163 write_longint(batch_fd, total_read);
164 write_longint(batch_fd, total_written);
165 write_longint(batch_fd, stats.total_size);
169 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
170 rprintf(FINFO,"Number of files transferred: %d\n",
171 stats.num_transferred_files);
172 rprintf(FINFO,"Total file size: %.0f bytes\n",
173 (double)stats.total_size);
174 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
175 (double)stats.total_transferred_size);
176 rprintf(FINFO,"Literal data: %.0f bytes\n",
177 (double)stats.literal_data);
178 rprintf(FINFO,"Matched data: %.0f bytes\n",
179 (double)stats.matched_data);
180 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
181 rprintf(FINFO,"Total bytes sent: %.0f\n",
182 (double)total_written);
183 rprintf(FINFO,"Total bytes received: %.0f\n",
187 if (verbose || do_stats) {
189 "\nsent %.0f bytes received %.0f bytes %.2f bytes/sec\n",
190 (double)total_written, (double)total_read,
191 (total_written + total_read)/(0.5 + (t - starttime)));
192 rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
193 (double)stats.total_size,
194 (double)stats.total_size / (total_written+total_read));
203 * If our C library can get malloc statistics, then show them to FINFO
205 static void show_malloc_stats(void)
212 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
214 am_server ? "server " : "",
215 am_daemon ? "daemon " : "",
217 rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena);
218 rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks);
219 rprintf(FINFO, " smblks: %10d\n", mi.smblks);
220 rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks);
221 rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd);
222 rprintf(FINFO, " allmem: %10d (bytes from sbrk + mmap)\n",
223 mi.arena + mi.hblkhd);
224 rprintf(FINFO, " usmblks: %10d\n", mi.usmblks);
225 rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks);
226 rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks);
227 rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks);
228 rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost);
229 #endif /* HAVE_MALLINFO */
233 /* Start the remote shell. cmd may be NULL to use the default. */
234 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
235 int *f_in, int *f_out)
238 char *args[MAX_ARGS];
240 char *tok, *dir = NULL;
243 if (!read_batch && !local_server) {
244 char *rsh_env = getenv(RSYNC_RSH_ENV);
253 for (tok = strtok(cmd, " "); tok; tok = strtok(NULL, " ")) {
254 /* Comparison leaves rooms for server_options(). */
255 if (argc >= MAX_ARGS - 100) {
256 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
257 exit_cleanup(RERR_SYNTAX);
262 /* check to see if we've already been given '-l user' in
263 * the remote-shell command */
264 for (i = 0; i < argc-1; i++) {
265 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
270 /* remsh (on HPUX) takes the arguments the other way around */
271 args[argc++] = machine;
272 if (user && !(daemon_over_rsh && dash_l_set)) {
277 if (user && !(daemon_over_rsh && dash_l_set)) {
281 args[argc++] = machine;
284 args[argc++] = rsync_path;
286 if (blocking_io < 0) {
288 if ((cp = strrchr(cmd, '/')) != NULL)
292 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
296 server_options(args,&argc);
298 if (argc >= MAX_ARGS - 2) {
299 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
300 exit_cleanup(RERR_SYNTAX);
306 if (!daemon_over_rsh && path && *path)
312 rprintf(FINFO,"cmd=");
313 for (i = 0; i < argc; i++)
314 rprintf(FINFO,"%s ",args[i]);
319 int from_gen_pipe[2];
320 if (fd_pair(from_gen_pipe) < 0) {
321 rsyserr(FERROR, errno, "pipe");
322 exit_cleanup(RERR_IPC);
324 batch_gen_fd = from_gen_pipe[0];
325 *f_out = from_gen_pipe[1];
327 ret = -1; /* no child pid */
328 } else if (local_server) {
329 /* If the user didn't request --[no-]whole-file, force
330 * it on, but only if we're not batch processing. */
331 if (whole_file < 0 && !write_batch)
333 ret = local_child(argc, args, f_in, f_out, child_main);
335 ret = piped_child(args,f_in,f_out);
343 out_of_memory("do_cmd");
344 return 0; /* not reached */
348 static char *get_local_name(struct file_list *flist,char *name)
354 rprintf(FINFO,"get_local_name count=%d %s\n",
355 flist->count, NS(name));
360 if (do_stat(name,&st) == 0) {
361 if (S_ISDIR(st.st_mode)) {
362 if (!push_dir(name)) {
363 rsyserr(FERROR, errno, "push_dir#1 %s failed",
365 exit_cleanup(RERR_FILESELECT);
369 if (flist->count > 1) {
370 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
371 exit_cleanup(RERR_FILESELECT);
376 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
379 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
380 rsyserr(FERROR, errno, "mkdir %s failed", full_fname(name));
381 exit_cleanup(RERR_FILEIO);
384 rprintf(FINFO, "created directory %s\n", name);
391 if (!push_dir(name)) {
392 rsyserr(FERROR, errno, "push_dir#2 %s failed",
394 exit_cleanup(RERR_FILESELECT);
401 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
404 struct file_list *flist;
408 rprintf(FINFO, "server_sender starting pid=%ld\n",
412 if (am_daemon && lp_write_only(module_id)) {
413 rprintf(FERROR, "ERROR: module is write only\n");
414 exit_cleanup(RERR_SYNTAX);
418 if (!relative_paths && !push_dir(dir)) {
419 rsyserr(FERROR, errno, "push_dir#3 %s failed",
421 exit_cleanup(RERR_FILESELECT);
426 if (strcmp(dir,".")) {
428 if (strcmp(dir,"/") == 0)
430 for (i = 0; i < argc; i++)
434 if (argc == 0 && recurse) {
440 flist = send_file_list(f_out,argc,argv);
441 if (!flist || flist->count == 0) {
445 io_start_buffering_in();
446 io_start_buffering_out();
448 send_files(flist,f_out,f_in);
449 io_flush(FULL_FLUSH);
451 if (protocol_version >= 24) {
452 /* final goodbye message */
455 io_flush(FULL_FLUSH);
460 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
466 /* The receiving side mustn't obey this, or an existing symlink that
467 * points to an identical file won't be replaced by the referent. */
470 if (preserve_hard_links)
471 init_hard_links(flist);
474 /* I moved this here from recv_files() to prevent a race condition */
475 if (recurse && delete_mode && !local_name && flist->count > 0)
479 if (fd_pair(error_pipe) < 0) {
480 rprintf(FERROR,"error pipe failed in do_recv\n");
481 exit_cleanup(RERR_SOCKETIO);
484 io_flush(NORMAL_FLUSH);
486 if ((pid = do_fork()) == 0) {
487 close(error_pipe[0]);
491 /* we can't let two processes write to the socket at one time */
492 close_multiplexing_out();
494 /* set place to send errors */
495 set_msg_fd_out(error_pipe[1]);
497 recv_files(f_in,flist,local_name);
498 io_flush(FULL_FLUSH);
501 send_msg(MSG_DONE, "", 0);
502 io_flush(FULL_FLUSH);
503 /* finally we go to sleep until our parent kills us
504 * with a USR2 signal. We sleep for a short time as on
505 * some OSes a signal won't interrupt a sleep! */
511 close_multiplexing_in();
515 close(error_pipe[1]);
519 io_start_buffering_out();
521 set_msg_fd_in(error_pipe[0]);
523 generate_files(f_out, flist, local_name);
525 get_redo_num(); /* Read final MSG_DONE and any prior messages. */
527 io_flush(FULL_FLUSH);
528 if (protocol_version >= 24) {
529 /* send a final goodbye message */
530 write_int(f_out, -1);
532 io_flush(FULL_FLUSH);
536 wait_process(pid, &status);
541 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
544 struct file_list *flist;
545 char *local_name = NULL;
549 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
550 argc, (long)getpid());
553 if (am_daemon && lp_read_only(module_id)) {
554 rprintf(FERROR,"ERROR: module is read only\n");
555 exit_cleanup(RERR_SYNTAX);
564 if (!am_daemon && !push_dir(dir)) {
565 rsyserr(FERROR, errno, "push_dir#4 %s failed",
567 exit_cleanup(RERR_FILESELECT);
571 io_start_buffering_in();
572 if (delete_mode && !delete_excluded)
573 recv_exclude_list(f_in);
575 if (filesfrom_fd >= 0) {
576 /* We're receiving the file info from the sender, so we need
577 * the IO routines to automatically write out the names onto
578 * our f_out socket as we read the list info from the sender.
579 * This avoids both deadlock and extra delays/buffers. */
580 io_set_filesfrom_fds(filesfrom_fd, f_out);
584 flist = recv_file_list(f_in);
586 rprintf(FERROR,"server_recv: recv_file_list error\n");
587 exit_cleanup(RERR_FILESELECT);
591 if (strcmp(dir,".")) {
592 argv[0] += strlen(dir);
593 if (argv[0][0] == '/')
596 local_name = get_local_name(flist,argv[0]);
599 status = do_recv(f_in,f_out,flist,local_name);
600 exit_cleanup(status);
604 int child_main(int argc, char *argv[])
606 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
611 void start_server(int f_in, int f_out, int argc, char *argv[])
613 set_nonblocking(f_in);
614 set_nonblocking(f_out);
616 io_set_sock_fds(f_in, f_out);
617 setup_protocol(f_out, f_in);
619 if (protocol_version >= 23)
620 io_start_multiplex_out();
623 keep_dirlinks = 0; /* Must be disabled on the sender. */
625 recv_exclude_list(f_in);
628 do_server_sender(f_in, f_out, argc, argv);
630 do_server_recv(f_in, f_out, argc, argv);
637 * This is called once the connection has been negotiated. It is used
638 * for rsyncd, remote-shell, and local connections.
640 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
642 struct file_list *flist = NULL;
643 int status = 0, status2 = 0;
644 char *local_name = NULL;
646 cleanup_child_pid = pid;
648 assert(am_sender == 0);
650 set_nonblocking(f_in);
651 set_nonblocking(f_out);
654 io_set_sock_fds(f_in, f_out);
655 setup_protocol(f_out,f_in);
657 if (protocol_version >= 23 && !read_batch)
658 io_start_multiplex_in();
660 /* We set our stderr file handle to blocking because ssh might have
661 * set it to non-blocking. This can be particularly troublesome if
662 * stderr is a clone of stdout, because ssh would have set our stdout
663 * to non-blocking at the same time (which can easily cause us to lose
664 * output from our print statements). This kluge shouldn't cause ssh
665 * any problems for how we use it. Note also that we delayed setting
666 * this until after the above protocol setup so that we know for sure
667 * that ssh is done twiddling its file descriptors. */
668 set_blocking(STDERR_FILENO);
671 keep_dirlinks = 0; /* Must be disabled on the sender. */
672 io_start_buffering_out();
675 if (delete_mode && !delete_excluded)
676 send_exclude_list(f_out);
677 if (remote_filesfrom_file)
681 start_write_batch(f_out);
682 if (!read_batch) /* don't write to pipe */
683 flist = send_file_list(f_out,argc,argv);
685 rprintf(FINFO,"file list sent\n");
687 io_flush(NORMAL_FLUSH);
688 send_files(flist,f_out,f_in);
689 io_flush(FULL_FLUSH);
690 if (protocol_version >= 24) {
691 /* final goodbye message */
696 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
697 io_flush(FULL_FLUSH);
698 wait_process(pid, &status);
701 io_flush(FULL_FLUSH);
702 exit_cleanup(status);
709 send_exclude_list(f_out);
711 if (filesfrom_fd >= 0) {
712 io_set_filesfrom_fds(filesfrom_fd, f_out);
717 start_write_batch(f_in);
718 flist = recv_file_list(f_in);
719 if (!flist || flist->count == 0) {
720 rprintf(FINFO, "client: nothing to do: "
721 "perhaps you need to specify some filenames or "
722 "the --recursive option?\n");
726 local_name = get_local_name(flist,argv[0]);
728 status2 = do_recv(f_in,f_out,flist,local_name);
732 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
733 io_flush(FULL_FLUSH);
734 wait_process(pid, &status);
737 return MAX(status, status2);
740 static int copy_argv (char *argv[])
744 for (i = 0; argv[i]; i++) {
745 if (!(argv[i] = strdup(argv[i]))) {
746 rprintf (FERROR, "out of memory at %s(%d)\n",
757 * Start a client for either type of remote connection. Work out
758 * whether the arguments request a remote shell or rsyncd connection,
759 * and call the appropriate connection function, then run_client.
761 * Calls either start_socket_client (for sockets) or do_cmd and
762 * client_run (for ssh).
764 static int start_client(int argc, char *argv[])
767 char *shell_machine = NULL;
768 char *shell_path = NULL;
769 char *shell_user = NULL;
775 /* Don't clobber argv[] so that ps(1) can still show the right
777 if ((rc = copy_argv(argv)))
780 /* rsync:// always uses rsync server over direct socket connection */
781 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0
785 host = argv[0] + strlen(URL_PREFIX);
786 p = strchr(host,'/');
792 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
798 p = strchr(host, ':');
800 rsync_port = atoi(p+1);
803 return start_socket_client(host, path, argc-1, argv+1);
806 if (!read_batch) { /* for read_batch, NO source is specified */
807 p = find_colon(argv[0]);
808 if (p) { /* source is remote */
809 if (remote_filesfrom_file
810 && remote_filesfrom_file != files_from + 1
811 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
813 "--files-from hostname is not the same as the transfer hostname\n");
814 exit_cleanup(RERR_SYNTAX);
816 if (p[1] == ':') { /* double colon */
819 return start_socket_client(argv[0], p+2,
826 if (argc < 1) { /* destination required */
828 exit_cleanup(RERR_SYNTAX);
833 shell_machine = argv[0];
836 } else { /* source is local */
839 /* rsync:// destination uses rsync server over direct socket */
840 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
843 host = argv[argc-1] + strlen(URL_PREFIX);
844 p = strchr(host,'/');
850 if (*host == '[' && (p = strchr(host, ']')) != NULL) {
856 p = strchr(host, ':');
858 rsync_port = atoi(p+1);
861 return start_socket_client(host, path, argc-1, argv);
864 p = find_colon(argv[argc-1]); /* look in dest arg */
865 if (p && remote_filesfrom_file
866 && remote_filesfrom_file != files_from + 1
867 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
869 "--files-from hostname is not the same as the transfer hostname\n");
870 exit_cleanup(RERR_SYNTAX);
872 if (!p) { /* no colon found, so src & dest are local */
874 if (remote_filesfrom_file) {
876 "--files-from cannot be remote when the transfer is local\n");
877 exit_cleanup(RERR_SYNTAX);
879 } else if (p[1] == ':') { /* double colon */
882 return start_socket_client(argv[argc-1], p+2,
891 exit_cleanup(RERR_SYNTAX);
895 shell_machine = NULL;
896 shell_path = argv[argc-1];
899 shell_machine = argv[argc-1];
904 } else { /* read_batch */
906 shell_path = argv[argc-1];
907 if (find_colon(shell_path)) {
908 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
909 exit_cleanup(RERR_SYNTAX);
914 p = strrchr(shell_machine,'@');
917 shell_user = shell_machine;
923 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
924 shell_cmd?shell_cmd:"",
925 shell_machine?shell_machine:"",
926 shell_user?shell_user:"",
927 shell_path?shell_path:"");
930 /* for remote source, only single dest arg can remain ... */
931 if (!am_sender && argc > 1) {
933 exit_cleanup(RERR_SYNTAX);
936 /* ... or no dest at all */
937 if (!am_sender && argc == 0) {
941 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
944 /* if we're running an rsync server on the remote host over a
945 * remote shell command, we need to do the RSYNCD protocol first */
946 if (daemon_over_rsh) {
948 tmpret = start_inband_exchange(shell_user, shell_path,
954 ret = client_run(f_in, f_out, pid, argc, argv);
963 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
965 exit_cleanup(RERR_SIGNAL);
968 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
970 if (log_got_error) _exit(RERR_PARTIAL);
974 static RETSIGTYPE sigchld_handler(UNUSED(int val))
979 /* An empty waitpid() loop was put here by Tridge and we could never
980 * get him to explain why he put it in, so rather than taking it
981 * out we're instead saving the child exit statuses for later use.
982 * The waitpid() loop presumably eliminates all possibility of leaving
983 * zombie children, maybe that's why he did it.
985 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
986 /* save the child's exit status */
987 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
988 if (pid_stat_table[cnt].pid == 0) {
989 pid_stat_table[cnt].pid = pid;
990 pid_stat_table[cnt].status = status;
1000 * This routine catches signals and tries to send them to gdb.
1002 * Because it's called from inside a signal handler it ought not to
1003 * use too many library routines.
1005 * @todo Perhaps use "screen -X" instead/as well, to help people
1006 * debugging without easy access to X. Perhaps use an environment
1007 * variable, or just call a script?
1009 * @todo The /proc/ magic probably only works on Linux (and
1010 * Solaris?) Can we be more portable?
1012 #ifdef MAINTAINER_MODE
1013 const char *get_panic_action(void)
1015 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1020 return "xterm -display :0 -T Panic -n Panic "
1021 "-e gdb /proc/%d/exe %d";
1026 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1028 * This signal handler is only installed if we were configured with
1029 * --enable-maintainer-mode. Perhaps it should always be on and we
1030 * should just look at the environment variable, but I'm a bit leery
1031 * of a signal sending us into a busy loop.
1033 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1038 sprintf(cmd_buf, get_panic_action(),
1039 getpid(), getpid());
1041 /* Unless we failed to execute gdb, we allow the process to
1042 * continue. I'm not sure if that's right. */
1043 ret = system(cmd_buf);
1050 int main(int argc,char *argv[])
1053 int orig_argc = argc;
1054 char **orig_argv = argv;
1056 signal(SIGUSR1, sigusr1_handler);
1057 signal(SIGUSR2, sigusr2_handler);
1058 signal(SIGCHLD, sigchld_handler);
1059 #ifdef MAINTAINER_MODE
1060 signal(SIGSEGV, rsync_panic_handler);
1061 signal(SIGFPE, rsync_panic_handler);
1062 signal(SIGABRT, rsync_panic_handler);
1063 signal(SIGBUS, rsync_panic_handler);
1064 #endif /* def MAINTAINER_MODE */
1066 starttime = time(NULL);
1067 am_root = (MY_UID() == 0);
1069 memset(&stats, 0, sizeof(stats));
1073 exit_cleanup(RERR_SYNTAX);
1076 /* we set a 0 umask so that correct file permissions can be
1078 orig_umask = (int)umask(0);
1080 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1081 /* FIXME: We ought to call the same error-handling
1082 * code here, rather than relying on getopt. */
1084 exit_cleanup(RERR_SYNTAX);
1087 signal(SIGINT,SIGNAL_CAST sig_int);
1088 signal(SIGHUP,SIGNAL_CAST sig_int);
1089 signal(SIGTERM,SIGNAL_CAST sig_int);
1091 /* Ignore SIGPIPE; we consistently check error codes and will
1093 signal(SIGPIPE, SIG_IGN);
1095 /* Initialize push_dir here because on some old systems getcwd
1096 * (implemented by forking "pwd" and reading its output) doesn't
1097 * work when there are other child processes. Also, on all systems
1098 * that implement getcwd that way "pwd" can't be found after chroot. */
1103 if (write_batch || read_batch) {
1105 write_batch_shell_file(orig_argc, orig_argv, argc);
1107 if (read_batch && strcmp(batch_name, "-") == 0)
1108 batch_fd = STDIN_FILENO;
1110 batch_fd = do_open(batch_name,
1111 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1112 : O_RDONLY, S_IRUSR | S_IWUSR);
1115 rsyserr(FERROR, errno, "Batch file %s open error",
1117 exit_cleanup(RERR_FILEIO);
1120 read_stream_flags(batch_fd);
1123 if (am_daemon && !am_server)
1124 return daemon_main();
1128 exit_cleanup(RERR_SYNTAX);
1132 verbose = MAX(verbose,1);
1135 set_nonblocking(STDIN_FILENO);
1136 set_nonblocking(STDOUT_FILENO);
1138 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1139 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1142 ret = start_client(argc, argv);
1144 exit_cleanup(RERR_STARTCLIENT);