2 * The startup routines, including main(), for rsync.
4 * Copyright (C) 1996-2001 Andrew Tridgell <tridge@samba.org>
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
7 * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
25 #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
35 extern int am_generator;
37 extern int blocking_io;
38 extern int remove_sent_files;
39 extern int daemon_over_rsh;
40 extern int need_messages_from_generator;
41 extern int kluge_around_eof;
43 extern int log_got_error;
45 extern int copy_links;
46 extern int copy_dirlinks;
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 struct stats stats;
61 extern char *filesfrom_host;
62 extern char *rsync_path;
63 extern char *shell_cmd;
64 extern char *batch_name;
67 mode_t orig_umask = 0;
68 struct file_list *the_file_list;
70 /* There's probably never more than at most 2 outstanding child processes,
71 * but set it higher, just in case. */
72 #define MAXCHILDPROCS 7
75 # ifdef HAVE_SIGPROCMASK
76 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
78 # define SIGACTMASK(n,h) SIGACTION(n,h)
80 static struct sigaction sigact;
86 } pid_stat_table[MAXCHILDPROCS];
88 static time_t starttime, endtime;
89 static int64 total_read, total_written;
91 static void show_malloc_stats(void);
93 /* Works like waitpid(), but if we already harvested the child pid in our
94 * remember_children(), we succeed instead of returning an error. */
95 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
97 pid_t waited_pid = waitpid(pid, status_ptr, flags);
99 if (waited_pid == -1 && errno == ECHILD) {
100 /* Status of requested child no longer available: check to
101 * see if it was processed by remember_children(). */
103 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
104 if (pid == pid_stat_table[cnt].pid) {
105 *status_ptr = pid_stat_table[cnt].status;
106 pid_stat_table[cnt].pid = 0;
115 /* Wait for a process to exit, calling io_flush while waiting. */
116 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
121 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
123 io_flush(FULL_FLUSH);
126 /* TODO: If the child exited on a signal, then log an
127 * appropriate error message. Perhaps we should also accept a
128 * message describing the purpose of the child. Also indicate
129 * this to the caller so that they know something went wrong. */
130 if (waited_pid < 0) {
131 rsyserr(FERROR, errno, "waitpid");
132 *exit_code_ptr = RERR_WAITCHILD;
133 } else if (!WIFEXITED(status)) {
135 if (WCOREDUMP(status))
136 *exit_code_ptr = RERR_CRASHED;
139 if (WIFSIGNALED(status))
140 *exit_code_ptr = RERR_TERMINATED;
142 *exit_code_ptr = RERR_WAITCHILD;
144 *exit_code_ptr = WEXITSTATUS(status);
147 /* This function gets called from all 3 processes. We want the client side
148 * to actually output the text, but the sender is the only process that has
149 * all the stats we need. So, if we're a client sender, we do the report.
150 * If we're a server sender, we write the stats on the supplied fd. If
151 * we're the client receiver we read the stats from the supplied fd and do
152 * the report. All processes might also generate a set of debug stats, if
153 * the verbose level is high enough (this is the only thing that the
154 * generator process and the server receiver ever do here). */
155 static void handle_stats(int f)
157 endtime = time(NULL);
159 /* Cache two stats because the read/write code can change it. */
160 total_read = stats.total_read;
161 total_written = stats.total_written;
163 if (do_stats && verbose > 1) {
164 /* These come out from every process */
173 log_exit(0, __FILE__, __LINE__);
174 if (f == -1 || !am_sender)
180 write_longint(f, total_read);
181 write_longint(f, total_written);
182 write_longint(f, stats.total_size);
183 if (protocol_version >= 29) {
184 write_longint(f, stats.flist_buildtime);
185 write_longint(f, stats.flist_xfertime);
191 /* this is the client */
193 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
195 else if (!am_sender) {
196 /* Read the first two in opposite order because the meaning of
197 * read/write swaps when switching from sender to receiver. */
198 total_written = read_longint(f);
199 total_read = read_longint(f);
200 stats.total_size = read_longint(f);
201 if (protocol_version >= 29) {
202 stats.flist_buildtime = read_longint(f);
203 stats.flist_xfertime = read_longint(f);
205 } else if (write_batch) {
206 /* The --read-batch process is going to be a client
207 * receiver, so we need to give it the stats. */
208 write_longint(batch_fd, total_read);
209 write_longint(batch_fd, total_written);
210 write_longint(batch_fd, stats.total_size);
211 if (protocol_version >= 29) {
212 write_longint(batch_fd, stats.flist_buildtime);
213 write_longint(batch_fd, stats.flist_xfertime);
218 static void output_summary(void)
221 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
222 rprintf(FINFO,"Number of files transferred: %d\n",
223 stats.num_transferred_files);
224 rprintf(FINFO,"Total file size: %s bytes\n",
225 human_num(stats.total_size));
226 rprintf(FINFO,"Total transferred file size: %s bytes\n",
227 human_num(stats.total_transferred_size));
228 rprintf(FINFO,"Literal data: %s bytes\n",
229 human_num(stats.literal_data));
230 rprintf(FINFO,"Matched data: %s bytes\n",
231 human_num(stats.matched_data));
232 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
233 if (stats.flist_buildtime) {
235 "File list generation time: %.3f seconds\n",
236 (double)stats.flist_buildtime / 1000);
238 "File list transfer time: %.3f seconds\n",
239 (double)stats.flist_xfertime / 1000);
241 rprintf(FINFO,"Total bytes sent: %s\n",
242 human_num(total_written));
243 rprintf(FINFO,"Total bytes received: %s\n",
244 human_num(total_read));
247 if (verbose || do_stats) {
249 "\nsent %s bytes received %s bytes %s bytes/sec\n",
250 human_num(total_written), human_num(total_read),
251 human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
252 rprintf(FINFO, "total size is %s speedup is %.2f\n",
253 human_num(stats.total_size),
254 (double)stats.total_size / (total_written+total_read));
263 * If our C library can get malloc statistics, then show them to FINFO
265 static void show_malloc_stats(void)
272 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
273 getpid(), am_server ? "server " : "",
274 am_daemon ? "daemon " : "", who_am_i());
275 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
277 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
279 rprintf(FINFO, " smblks: %10ld\n",
281 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
283 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
285 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
286 (long)mi.arena + mi.hblkhd);
287 rprintf(FINFO, " usmblks: %10ld\n",
289 rprintf(FINFO, " fsmblks: %10ld\n",
291 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
293 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
295 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
297 #endif /* HAVE_MALLINFO */
301 /* Start the remote shell. cmd may be NULL to use the default. */
302 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
303 int *f_in, int *f_out)
306 char *args[MAX_ARGS];
311 if (!read_batch && !local_server) {
312 char *t, *f, in_quote = '\0';
313 char *rsh_env = getenv(RSYNC_RSH_ENV);
322 for (t = f = cmd; *f; f++) {
325 /* Comparison leaves rooms for server_options(). */
326 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
327 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
328 exit_cleanup(RERR_SYNTAX);
331 while (*f != ' ' || in_quote) {
335 "Missing trailing-%c in remote-shell command.\n",
337 exit_cleanup(RERR_SYNTAX);
342 if (*f == '\'' || *f == '"') {
347 if (*f == in_quote && *++f != in_quote) {
357 /* check to see if we've already been given '-l user' in
358 * the remote-shell command */
359 for (i = 0; i < argc-1; i++) {
360 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
365 /* remsh (on HPUX) takes the arguments the other way around */
366 args[argc++] = machine;
367 if (user && !(daemon_over_rsh && dash_l_set)) {
372 if (user && !(daemon_over_rsh && dash_l_set)) {
376 args[argc++] = machine;
379 args[argc++] = rsync_path;
381 if (blocking_io < 0) {
383 if ((cp = strrchr(cmd, '/')) != NULL)
387 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
391 server_options(args,&argc);
393 if (argc >= MAX_ARGS - 2) {
394 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
395 exit_cleanup(RERR_SYNTAX);
401 if (!daemon_over_rsh && path && *path)
407 for (i = 0; i < argc; i++)
408 rprintf(FINFO, "cmd[%d]=%s ", i, args[i]);
409 rprintf(FINFO, "\n");
413 int from_gen_pipe[2];
414 if (fd_pair(from_gen_pipe) < 0) {
415 rsyserr(FERROR, errno, "pipe");
416 exit_cleanup(RERR_IPC);
418 batch_gen_fd = from_gen_pipe[0];
419 *f_out = from_gen_pipe[1];
421 ret = -1; /* no child pid */
422 } else if (local_server) {
423 /* If the user didn't request --[no-]whole-file, force
424 * it on, but only if we're not batch processing. */
425 if (whole_file < 0 && !write_batch)
427 ret = local_child(argc, args, f_in, f_out, child_main);
429 ret = piped_child(args,f_in,f_out);
437 out_of_memory("do_cmd");
438 return 0; /* not reached */
441 /* The receiving side operates in one of two modes:
443 * 1. it receives any number of files into a destination directory,
444 * placing them according to their names in the file-list.
446 * 2. it receives a single file and saves it using the name in the
447 * destination path instead of its file-list name. This requires a
448 * "local name" for writing out the destination file.
450 * So, our task is to figure out what mode/local-name we need and return
451 * either a NULL for mode 1, or the local-name for mode 2. We also
452 * change directory if there are any path components in dest_path. */
453 static char *get_local_name(struct file_list *flist, char *dest_path)
459 rprintf(FINFO, "get_local_name count=%d %s\n",
460 flist->count, NS(dest_path));
463 if (!dest_path || list_only)
466 /* If the destination path refers to an existing directory, enter
467 * it and use mode 1. If there is something other than a directory
468 * at the destination path, we must be transferring one file
469 * (anything at the destination will be overwritten). */
470 if (do_stat(dest_path, &st) == 0) {
471 if (S_ISDIR(st.st_mode)) {
472 if (!push_dir(dest_path)) {
473 rsyserr(FERROR, errno, "push_dir#1 %s failed",
474 full_fname(dest_path));
475 exit_cleanup(RERR_FILESELECT);
479 if (flist->count > 1) {
481 "ERROR: destination must be a directory when"
482 " copying more than 1 file\n");
483 exit_cleanup(RERR_FILESELECT);
485 /* Caution: flist->count could be 0! */
486 if (flist->count == 1 && S_ISDIR(flist->files[0]->mode)) {
488 "ERROR: cannot overwrite non-directory"
489 " with a directory\n");
490 exit_cleanup(RERR_FILESELECT);
492 } else if (errno != ENOENT) {
493 rsyserr(FERROR, errno, "cannot stat destination %s",
494 full_fname(dest_path));
495 exit_cleanup(RERR_FILESELECT);
498 cp = strrchr(dest_path, '/');
500 /* If the destination path ends in a slash or we are transferring
501 * multiple files, create a directory at the destination path,
502 * enter the new directory, and use mode 1. */
503 if (flist->count > 1 || (cp && !cp[1])) {
504 /* Lop off the final slash (if any). */
508 if (mkdir_defmode(dest_path) != 0) {
509 rsyserr(FERROR, errno, "mkdir %s failed",
510 full_fname(dest_path));
511 exit_cleanup(RERR_FILEIO);
515 rprintf(FINFO, "created directory %s\n", dest_path);
518 /* Indicate that the destination directory doesn't
519 * really exist and return mode 1. */
524 if (!push_dir(dest_path)) {
525 rsyserr(FERROR, errno, "push_dir#2 %s failed",
526 full_fname(dest_path));
527 exit_cleanup(RERR_FILESELECT);
533 /* Otherwise, we are writing a single file, possibly on top of an
534 * existing non-directory. Change to the item's parent directory
535 * (if it has a path component), return the basename of the
536 * destination file as the local name, and use mode 2. */
544 if (!push_dir(dest_path)) {
545 rsyserr(FERROR, errno, "push_dir#3 %s failed",
546 full_fname(dest_path));
547 exit_cleanup(RERR_FILESELECT);
555 /* This is only called by the sender. */
556 static void read_final_goodbye(int f_in, int f_out)
560 if (protocol_version < 29)
563 while ((i = read_int(f_in)) == the_file_list->count
564 && read_shortint(f_in) == ITEM_IS_NEW) {
565 /* Forward the keep-alive (no-op) to the receiver. */
566 write_int(f_out, the_file_list->count);
567 write_shortint(f_out, ITEM_IS_NEW);
572 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
574 exit_cleanup(RERR_PROTOCOL);
579 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
581 struct file_list *flist;
585 rprintf(FINFO, "server_sender starting pid=%ld\n",
589 if (am_daemon && lp_write_only(module_id)) {
590 rprintf(FERROR, "ERROR: module is write only\n");
591 exit_cleanup(RERR_SYNTAX);
594 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
596 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
597 exit_cleanup(RERR_SYNTAX);
601 if (!relative_paths && !push_dir(dir)) {
602 rsyserr(FERROR, errno, "push_dir#3 %s failed",
604 exit_cleanup(RERR_FILESELECT);
609 if (argc == 0 && (recurse || list_only)) {
615 flist = send_file_list(f_out,argc,argv);
616 if (!flist || flist->count == 0) {
619 the_file_list = flist;
621 io_start_buffering_in();
622 io_start_buffering_out();
624 send_files(flist,f_out,f_in);
625 io_flush(FULL_FLUSH);
627 if (protocol_version >= 24)
628 read_final_goodbye(f_in, f_out);
629 io_flush(FULL_FLUSH);
634 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
640 /* The receiving side mustn't obey this, or an existing symlink that
641 * points to an identical file won't be replaced by the referent. */
642 copy_links = copy_dirlinks = 0;
644 if (preserve_hard_links)
647 if (fd_pair(error_pipe) < 0) {
648 rsyserr(FERROR, errno, "pipe failed in do_recv");
649 exit_cleanup(RERR_IPC);
652 io_flush(NORMAL_FLUSH);
654 if ((pid = do_fork()) == -1) {
655 rsyserr(FERROR, errno, "fork failed in do_recv");
656 exit_cleanup(RERR_IPC);
660 close(error_pipe[0]);
664 /* we can't let two processes write to the socket at one time */
665 close_multiplexing_out();
667 /* set place to send errors */
668 set_msg_fd_out(error_pipe[1]);
670 recv_files(f_in, flist, local_name);
671 io_flush(FULL_FLUSH);
674 send_msg(MSG_DONE, "", 0);
675 io_flush(FULL_FLUSH);
677 /* Handle any keep-alive packets from the post-processing work
678 * that the generator does. */
679 if (protocol_version >= 29) {
680 kluge_around_eof = -1;
682 /* This should only get stopped via a USR2 signal. */
683 while (read_int(f_in) == flist->count
684 && read_shortint(f_in) == ITEM_IS_NEW) {}
686 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
688 exit_cleanup(RERR_PROTOCOL);
691 /* Finally, we go to sleep until our parent kills us with a
692 * USR2 signal. We sleep for a short time, as on some OSes
693 * a signal won't interrupt a sleep! */
699 close_multiplexing_in();
700 if (write_batch && !am_server)
703 close(error_pipe[1]);
707 io_start_buffering_out();
709 set_msg_fd_in(error_pipe[0]);
711 generate_files(f_out, flist, local_name);
714 io_flush(FULL_FLUSH);
715 if (protocol_version >= 24) {
716 /* send a final goodbye message */
717 write_int(f_out, -1);
719 io_flush(FULL_FLUSH);
723 wait_process_with_flush(pid, &exit_code);
728 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
731 struct file_list *flist;
732 char *local_name = NULL;
734 int save_verbose = verbose;
736 if (filesfrom_fd >= 0) {
737 /* We can't mix messages with files-from data on the socket,
738 * so temporarily turn off verbose messages. */
743 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
744 argc, (long)getpid());
747 if (am_daemon && lp_read_only(module_id)) {
748 rprintf(FERROR,"ERROR: module is read only\n");
749 exit_cleanup(RERR_SYNTAX);
757 if (!am_daemon && !push_dir(dir)) {
758 rsyserr(FERROR, errno, "push_dir#4 %s failed",
760 exit_cleanup(RERR_FILESELECT);
764 io_start_buffering_in();
765 recv_filter_list(f_in);
767 if (filesfrom_fd >= 0) {
768 /* We need to send the files-from names to the sender at the
769 * same time that we receive the file-list from them, so we
770 * need the IO routines to automatically write out the names
771 * onto our f_out socket as we read the file-list. This
772 * avoids both deadlock and extra delays/buffers. */
773 io_set_filesfrom_fds(filesfrom_fd, f_out);
777 flist = recv_file_list(f_in);
778 verbose = save_verbose;
780 rprintf(FERROR,"server_recv: recv_file_list error\n");
781 exit_cleanup(RERR_FILESELECT);
783 the_file_list = flist;
786 local_name = get_local_name(flist,argv[0]);
788 exit_code = do_recv(f_in,f_out,flist,local_name);
789 exit_cleanup(exit_code);
793 int child_main(int argc, char *argv[])
795 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
800 void start_server(int f_in, int f_out, int argc, char *argv[])
802 set_nonblocking(f_in);
803 set_nonblocking(f_out);
805 io_set_sock_fds(f_in, f_out);
806 setup_protocol(f_out, f_in);
807 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
811 if (protocol_version >= 23)
812 io_start_multiplex_out();
815 keep_dirlinks = 0; /* Must be disabled on the sender. */
816 if (need_messages_from_generator)
817 io_start_multiplex_in();
819 recv_filter_list(f_in);
820 do_server_sender(f_in, f_out, argc, argv);
822 do_server_recv(f_in, f_out, argc, argv);
829 * This is called once the connection has been negotiated. It is used
830 * for rsyncd, remote-shell, and local connections.
832 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
834 struct file_list *flist = NULL;
835 int exit_code = 0, exit_code2 = 0;
836 char *local_name = NULL;
838 cleanup_child_pid = pid;
840 set_nonblocking(f_in);
841 set_nonblocking(f_out);
844 io_set_sock_fds(f_in, f_out);
845 setup_protocol(f_out,f_in);
846 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
850 if (protocol_version >= 23 && !read_batch)
851 io_start_multiplex_in();
853 /* We set our stderr file handle to blocking because ssh might have
854 * set it to non-blocking. This can be particularly troublesome if
855 * stderr is a clone of stdout, because ssh would have set our stdout
856 * to non-blocking at the same time (which can easily cause us to lose
857 * output from our print statements). This kluge shouldn't cause ssh
858 * any problems for how we use it. Note also that we delayed setting
859 * this until after the above protocol setup so that we know for sure
860 * that ssh is done twiddling its file descriptors. */
861 set_blocking(STDERR_FILENO);
864 keep_dirlinks = 0; /* Must be disabled on the sender. */
865 io_start_buffering_out();
868 send_filter_list(f_out);
872 if (write_batch && !am_server)
873 start_write_batch(f_out);
874 flist = send_file_list(f_out, argc, argv);
877 rprintf(FINFO,"file list sent\n");
878 the_file_list = flist;
880 io_flush(NORMAL_FLUSH);
881 send_files(flist,f_out,f_in);
882 io_flush(FULL_FLUSH);
884 if (protocol_version >= 24)
885 read_final_goodbye(f_in, f_out);
888 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
889 io_flush(FULL_FLUSH);
890 wait_process_with_flush(pid, &exit_code);
893 io_flush(FULL_FLUSH);
894 exit_cleanup(exit_code);
897 if (need_messages_from_generator && !read_batch)
898 io_start_multiplex_out();
903 send_filter_list(read_batch ? -1 : f_out);
905 if (filesfrom_fd >= 0) {
906 io_set_filesfrom_fds(filesfrom_fd, f_out);
910 if (write_batch && !am_server)
911 start_write_batch(f_in);
912 flist = recv_file_list(f_in);
913 the_file_list = flist;
915 if (flist && flist->count > 0) {
916 local_name = get_local_name(flist, argv[0]);
918 exit_code2 = do_recv(f_in, f_out, flist, local_name);
926 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
927 io_flush(FULL_FLUSH);
928 wait_process_with_flush(pid, &exit_code);
931 return MAX(exit_code, exit_code2);
934 static int copy_argv (char *argv[])
938 for (i = 0; argv[i]; i++) {
939 if (!(argv[i] = strdup(argv[i]))) {
940 rprintf (FERROR, "out of memory at %s(%d)\n",
951 * Start a client for either type of remote connection. Work out
952 * whether the arguments request a remote shell or rsyncd connection,
953 * and call the appropriate connection function, then run_client.
955 * Calls either start_socket_client (for sockets) or do_cmd and
956 * client_run (for ssh).
958 static int start_client(int argc, char *argv[])
961 char *shell_machine = NULL;
962 char *shell_path = NULL;
963 char *shell_user = NULL;
969 /* Don't clobber argv[] so that ps(1) can still show the right
971 if ((rc = copy_argv(argv)))
974 if (!read_batch) { /* for read_batch, NO source is specified */
975 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
976 if (shell_path) { /* source is remote */
980 && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
982 "The source and destination cannot both be remote.\n");
983 exit_cleanup(RERR_SYNTAX);
986 if (filesfrom_host && *filesfrom_host
987 && strcmp(filesfrom_host, shell_machine) != 0) {
989 "--files-from hostname is not the same as the transfer hostname\n");
990 exit_cleanup(RERR_SYNTAX);
994 return start_socket_client(shell_machine,
1002 } else { /* source is local, check dest arg */
1012 shell_path = check_for_hostspec(p, &shell_machine, &rsync_port);
1013 if (shell_path && filesfrom_host && *filesfrom_host
1014 && strcmp(filesfrom_host, shell_machine) != 0) {
1016 "--files-from hostname is not the same as the transfer hostname\n");
1017 exit_cleanup(RERR_SYNTAX);
1019 if (!shell_path) { /* no hostspec found, so src & dest are local */
1021 if (filesfrom_host) {
1023 "--files-from cannot be remote when the transfer is local\n");
1024 exit_cleanup(RERR_SYNTAX);
1026 shell_machine = NULL;
1028 } else if (rsync_port) {
1030 return start_socket_client(shell_machine,
1034 daemon_over_rsh = 1;
1037 } else { /* read_batch */
1039 shell_path = argv[argc-1];
1040 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1041 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1042 exit_cleanup(RERR_SYNTAX);
1046 if (shell_machine) {
1047 p = strrchr(shell_machine,'@');
1050 shell_user = shell_machine;
1051 shell_machine = p+1;
1056 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1057 shell_cmd ? shell_cmd : "",
1058 shell_machine ? shell_machine : "",
1059 shell_user ? shell_user : "",
1060 shell_path ? shell_path : "");
1063 /* for remote source, only single dest arg can remain ... */
1064 if (!am_sender && argc > 1) {
1066 exit_cleanup(RERR_SYNTAX);
1069 /* ... or no dest at all */
1070 if (!am_sender && argc == 0)
1073 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1076 /* if we're running an rsync server on the remote host over a
1077 * remote shell command, we need to do the RSYNCD protocol first */
1078 if (daemon_over_rsh) {
1080 tmpret = start_inband_exchange(shell_user, shell_path,
1086 ret = client_run(f_in, f_out, pid, argc, argv);
1095 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1097 exit_cleanup(RERR_SIGNAL1);
1100 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1106 _exit(RERR_PARTIAL);
1110 RETSIGTYPE remember_children(UNUSED(int val))
1115 /* An empty waitpid() loop was put here by Tridge and we could never
1116 * get him to explain why he put it in, so rather than taking it
1117 * out we're instead saving the child exit statuses for later use.
1118 * The waitpid() loop presumably eliminates all possibility of leaving
1119 * zombie children, maybe that's why he did it. */
1120 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1121 /* save the child's exit status */
1122 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1123 if (pid_stat_table[cnt].pid == 0) {
1124 pid_stat_table[cnt].pid = pid;
1125 pid_stat_table[cnt].status = status;
1131 #ifndef HAVE_SIGACTION
1132 signal(SIGCHLD, remember_children);
1138 * This routine catches signals and tries to send them to gdb.
1140 * Because it's called from inside a signal handler it ought not to
1141 * use too many library routines.
1143 * @todo Perhaps use "screen -X" instead/as well, to help people
1144 * debugging without easy access to X. Perhaps use an environment
1145 * variable, or just call a script?
1147 * @todo The /proc/ magic probably only works on Linux (and
1148 * Solaris?) Can we be more portable?
1150 #ifdef MAINTAINER_MODE
1151 const char *get_panic_action(void)
1153 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1158 return "xterm -display :0 -T Panic -n Panic "
1159 "-e gdb /proc/%d/exe %d";
1164 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1166 * This signal handler is only installed if we were configured with
1167 * --enable-maintainer-mode. Perhaps it should always be on and we
1168 * should just look at the environment variable, but I'm a bit leery
1169 * of a signal sending us into a busy loop.
1171 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1176 sprintf(cmd_buf, get_panic_action(),
1177 getpid(), getpid());
1179 /* Unless we failed to execute gdb, we allow the process to
1180 * continue. I'm not sure if that's right. */
1181 ret = system(cmd_buf);
1188 int main(int argc,char *argv[])
1191 int orig_argc = argc;
1192 char **orig_argv = argv;
1193 #ifdef HAVE_SIGACTION
1194 # ifdef HAVE_SIGPROCMASK
1197 sigemptyset(&sigmask);
1199 sigact.sa_flags = SA_NOCLDSTOP;
1201 SIGACTMASK(SIGUSR1, sigusr1_handler);
1202 SIGACTMASK(SIGUSR2, sigusr2_handler);
1203 SIGACTMASK(SIGCHLD, remember_children);
1204 #ifdef MAINTAINER_MODE
1205 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1206 SIGACTMASK(SIGFPE, rsync_panic_handler);
1207 SIGACTMASK(SIGABRT, rsync_panic_handler);
1208 SIGACTMASK(SIGBUS, rsync_panic_handler);
1211 starttime = time(NULL);
1212 am_root = (MY_UID() == 0);
1214 memset(&stats, 0, sizeof(stats));
1218 exit_cleanup(RERR_SYNTAX);
1221 /* we set a 0 umask so that correct file permissions can be
1223 orig_umask = umask(0);
1225 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1226 setlocale(LC_CTYPE, "");
1229 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1230 /* FIXME: We ought to call the same error-handling
1231 * code here, rather than relying on getopt. */
1233 exit_cleanup(RERR_SYNTAX);
1236 SIGACTMASK(SIGINT, sig_int);
1237 SIGACTMASK(SIGHUP, sig_int);
1238 SIGACTMASK(SIGTERM, sig_int);
1239 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1240 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1243 /* Ignore SIGPIPE; we consistently check error codes and will
1245 SIGACTION(SIGPIPE, SIG_IGN);
1247 SIGACTION(SIGXFSZ, SIG_IGN);
1250 /* Initialize push_dir here because on some old systems getcwd
1251 * (implemented by forking "pwd" and reading its output) doesn't
1252 * work when there are other child processes. Also, on all systems
1253 * that implement getcwd that way "pwd" can't be found after chroot. */
1258 if ((write_batch || read_batch) && !am_server) {
1260 write_batch_shell_file(orig_argc, orig_argv, argc);
1262 if (read_batch && strcmp(batch_name, "-") == 0)
1263 batch_fd = STDIN_FILENO;
1265 batch_fd = do_open(batch_name,
1266 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1267 : O_RDONLY, S_IRUSR | S_IWUSR);
1270 rsyserr(FERROR, errno, "Batch file %s open error",
1271 full_fname(batch_name));
1272 exit_cleanup(RERR_FILEIO);
1275 read_stream_flags(batch_fd);
1277 if (write_batch < 0)
1280 if (am_daemon && !am_server)
1281 return daemon_main();
1285 exit_cleanup(RERR_SYNTAX);
1289 set_nonblocking(STDIN_FILENO);
1290 set_nonblocking(STDOUT_FILENO);
1292 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1293 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1296 ret = start_client(argc, argv);
1298 exit_cleanup(RERR_STARTCLIENT);