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.
23 #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
33 extern int am_generator;
35 extern int blocking_io;
36 extern int remove_sent_files;
37 extern int daemon_over_rsh;
38 extern int need_messages_from_generator;
39 extern int kluge_around_eof;
41 extern int log_got_error;
43 extern int orig_umask;
44 extern int copy_links;
45 extern int keep_dirlinks;
46 extern int preserve_hard_links;
47 extern int protocol_version;
49 extern int relative_paths;
50 extern int rsync_port;
51 extern int whole_file;
52 extern int read_batch;
53 extern int write_batch;
55 extern int batch_gen_fd;
56 extern int filesfrom_fd;
57 extern pid_t cleanup_child_pid;
58 extern struct stats stats;
59 extern char *filesfrom_host;
60 extern char *rsync_path;
61 extern char *shell_cmd;
62 extern char *batch_name;
65 struct file_list *the_file_list;
67 /* There's probably never more than at most 2 outstanding child processes,
68 * but set it higher, just in case. */
69 #define MAXCHILDPROCS 7
72 # ifdef HAVE_SIGPROCMASK
73 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
75 # define SIGACTMASK(n,h) SIGACTION(n,h)
77 static struct sigaction sigact;
83 } pid_stat_table[MAXCHILDPROCS];
85 static time_t starttime, endtime;
86 static int64 total_read, total_written;
88 static void show_malloc_stats(void);
90 /* Works like waitpid(), but if we already harvested the child pid in our
91 * sigchld_handler(), we succeed instead of returning an error. */
92 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
94 pid_t waited_pid = waitpid(pid, status_ptr, flags);
96 if (waited_pid == -1 && errno == ECHILD) {
97 /* Status of requested child no longer available: check to
98 * see if it was processed by sigchld_handler(). */
100 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
101 if (pid == pid_stat_table[cnt].pid) {
102 *status_ptr = pid_stat_table[cnt].status;
103 pid_stat_table[cnt].pid = 0;
112 /* Wait for a process to exit, calling io_flush while waiting. */
113 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
118 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
120 io_flush(FULL_FLUSH);
123 /* TODO: If the child exited on a signal, then log an
124 * appropriate error message. Perhaps we should also accept a
125 * message describing the purpose of the child. Also indicate
126 * this to the caller so that they know something went wrong. */
127 if (waited_pid < 0) {
128 rsyserr(FERROR, errno, "waitpid");
129 *exit_code_ptr = RERR_WAITCHILD;
130 } else if (!WIFEXITED(status)) {
132 if (WCOREDUMP(status))
133 *exit_code_ptr = RERR_CRASHED;
136 if (WIFSIGNALED(status))
137 *exit_code_ptr = RERR_TERMINATED;
139 *exit_code_ptr = RERR_WAITCHILD;
141 *exit_code_ptr = WEXITSTATUS(status);
144 /* This function gets called from all 3 processes. We want the client side
145 * to actually output the text, but the sender is the only process that has
146 * all the stats we need. So, if we're a client sender, we do the report.
147 * If we're a server sender, we write the stats on the supplied fd. If
148 * we're the client receiver we read the stats from the supplied fd and do
149 * the report. All processes might also generate a set of debug stats, if
150 * the verbose level is high enough (this is the only thing that the
151 * generator process and the server receiver ever do here). */
152 static void handle_stats(int f)
154 endtime = time(NULL);
156 /* Cache two stats because the read/write code can change it. */
157 total_read = stats.total_read;
158 total_written = stats.total_written;
160 if (do_stats && verbose > 1) {
161 /* These come out from every process */
170 log_exit(0, __FILE__, __LINE__);
171 if (f == -1 || !am_sender)
177 write_longint(f, total_read);
178 write_longint(f, total_written);
179 write_longint(f, stats.total_size);
180 if (protocol_version >= 29) {
181 write_longint(f, stats.flist_buildtime);
182 write_longint(f, stats.flist_xfertime);
188 /* this is the client */
190 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
192 else if (!am_sender) {
193 /* Read the first two in opposite order because the meaning of
194 * read/write swaps when switching from sender to receiver. */
195 total_written = read_longint(f);
196 total_read = read_longint(f);
197 stats.total_size = read_longint(f);
198 if (protocol_version >= 29) {
199 stats.flist_buildtime = read_longint(f);
200 stats.flist_xfertime = read_longint(f);
202 } else if (write_batch) {
203 /* The --read-batch process is going to be a client
204 * receiver, so we need to give it the stats. */
205 write_longint(batch_fd, total_read);
206 write_longint(batch_fd, total_written);
207 write_longint(batch_fd, stats.total_size);
208 if (protocol_version >= 29) {
209 write_longint(batch_fd, stats.flist_buildtime);
210 write_longint(batch_fd, stats.flist_xfertime);
215 static void output_summary(void)
218 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
219 rprintf(FINFO,"Number of files transferred: %d\n",
220 stats.num_transferred_files);
221 rprintf(FINFO,"Total file size: %s bytes\n",
222 human_num(stats.total_size));
223 rprintf(FINFO,"Total transferred file size: %s bytes\n",
224 human_num(stats.total_transferred_size));
225 rprintf(FINFO,"Literal data: %s bytes\n",
226 human_num(stats.literal_data));
227 rprintf(FINFO,"Matched data: %s bytes\n",
228 human_num(stats.matched_data));
229 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
230 if (stats.flist_buildtime) {
232 "File list generation time: %.3f seconds\n",
233 (double)stats.flist_buildtime / 1000);
235 "File list transfer time: %.3f seconds\n",
236 (double)stats.flist_xfertime / 1000);
238 rprintf(FINFO,"Total bytes sent: %s\n",
239 human_num(total_written));
240 rprintf(FINFO,"Total bytes received: %s\n",
241 human_num(total_read));
244 if (verbose || do_stats) {
246 "\nsent %s bytes received %s bytes %s bytes/sec\n",
247 human_num(total_written), human_num(total_read),
248 human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
249 rprintf(FINFO, "total size is %s speedup is %.2f\n",
250 human_num(stats.total_size),
251 (double)stats.total_size / (total_written+total_read));
260 * If our C library can get malloc statistics, then show them to FINFO
262 static void show_malloc_stats(void)
269 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
270 getpid(), am_server ? "server " : "",
271 am_daemon ? "daemon " : "", who_am_i());
272 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
274 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
276 rprintf(FINFO, " smblks: %10ld\n",
278 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
280 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
282 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
283 (long)mi.arena + mi.hblkhd);
284 rprintf(FINFO, " usmblks: %10ld\n",
286 rprintf(FINFO, " fsmblks: %10ld\n",
288 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
290 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
292 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
294 #endif /* HAVE_MALLINFO */
298 /* Start the remote shell. cmd may be NULL to use the default. */
299 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
300 int *f_in, int *f_out)
303 char *args[MAX_ARGS];
308 if (!read_batch && !local_server) {
309 char *t, *f, in_quote = '\0';
310 char *rsh_env = getenv(RSYNC_RSH_ENV);
319 for (t = f = cmd; *f; f++) {
322 /* Comparison leaves rooms for server_options(). */
323 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
324 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
325 exit_cleanup(RERR_SYNTAX);
328 while (*f != ' ' || in_quote) {
332 "Missing trailing-%c in remote-shell command.\n",
334 exit_cleanup(RERR_SYNTAX);
339 if (*f == '\'' || *f == '"') {
344 if (*f == in_quote && *++f != in_quote) {
354 /* check to see if we've already been given '-l user' in
355 * the remote-shell command */
356 for (i = 0; i < argc-1; i++) {
357 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
362 /* remsh (on HPUX) takes the arguments the other way around */
363 args[argc++] = machine;
364 if (user && !(daemon_over_rsh && dash_l_set)) {
369 if (user && !(daemon_over_rsh && dash_l_set)) {
373 args[argc++] = machine;
376 args[argc++] = rsync_path;
378 if (blocking_io < 0) {
380 if ((cp = strrchr(cmd, '/')) != NULL)
384 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
388 server_options(args,&argc);
390 if (argc >= MAX_ARGS - 2) {
391 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
392 exit_cleanup(RERR_SYNTAX);
398 if (!daemon_over_rsh && path && *path)
404 for (i = 0; i < argc; i++)
405 rprintf(FINFO, "cmd[%d]=%s ", i, args[i]);
406 rprintf(FINFO, "\n");
410 int from_gen_pipe[2];
411 if (fd_pair(from_gen_pipe) < 0) {
412 rsyserr(FERROR, errno, "pipe");
413 exit_cleanup(RERR_IPC);
415 batch_gen_fd = from_gen_pipe[0];
416 *f_out = from_gen_pipe[1];
418 ret = -1; /* no child pid */
419 } else if (local_server) {
420 /* If the user didn't request --[no-]whole-file, force
421 * it on, but only if we're not batch processing. */
422 if (whole_file < 0 && !write_batch)
424 ret = local_child(argc, args, f_in, f_out, child_main);
426 ret = piped_child(args,f_in,f_out);
434 out_of_memory("do_cmd");
435 return 0; /* not reached */
438 /* The receiving side operates in one of two modes:
440 * 1. it enters a directory and receives one or more files, placing them
441 * according to their names in the file-list.
443 * 2. it receives a single file and saves it using the name in the
444 * destination path instead of its file-list name. This requires a
445 * "local name" for writing out the destination file.
447 * So, our task is to figure out what mode/local-name we need and return
448 * either a NULL for mode 1, or the local-name for mode 2. We also
449 * change directory if there are any path components in dest_path. */
450 static char *get_local_name(struct file_list *flist, char *dest_path)
456 rprintf(FINFO, "get_local_name count=%d %s\n",
457 flist->count, NS(dest_path));
463 /* If the destination path refers to an existing directory, enter
464 * it and use mode 1. If there is something other than a directory
465 * at the destination path, we must be transferring one file
466 * (anything at the destination will be overwritten). */
467 if (do_stat(dest_path, &st) == 0) {
468 if (S_ISDIR(st.st_mode)) {
469 if (!push_dir(dest_path)) {
470 rsyserr(FERROR, errno, "push_dir#1 %s failed",
471 full_fname(dest_path));
472 exit_cleanup(RERR_FILESELECT);
476 if (flist->count > 1) {
478 "ERROR: destination must be a directory when"
479 " copying more than 1 file\n");
480 exit_cleanup(RERR_FILESELECT);
484 cp = strrchr(dest_path, '/');
486 /* If the destination path ends in a slash or we are transferring
487 * multiple files, create a directory at the destination path,
488 * enter the new directory, and use mode 1. */
489 if (flist->count > 1 || (cp && !cp[1])) {
490 /* Lop off the final slash (if any). */
495 if (do_mkdir(dest_path, 0777) != 0) {
496 rsyserr(FERROR, errno, "mkdir %s failed",
497 full_fname(dest_path));
498 exit_cleanup(RERR_FILEIO);
503 rprintf(FINFO, "created directory %s\n", dest_path);
506 /* Indicate that the destination directory doesn't
507 * really exist and return mode 1. */
512 if (!push_dir(dest_path)) {
513 rsyserr(FERROR, errno, "push_dir#2 %s failed",
514 full_fname(dest_path));
515 exit_cleanup(RERR_FILESELECT);
521 /* Otherwise, we are writing a single file, possibly on top of an
522 * existing non-directory. Change to the item's parent directory
523 * (if it has a path component), return the basename of the
524 * destination file as the local name, and use mode 2. */
532 if (!push_dir(dest_path)) {
533 rsyserr(FERROR, errno, "push_dir#3 %s failed",
534 full_fname(dest_path));
535 exit_cleanup(RERR_FILESELECT);
543 /* This is only called by the sender. */
544 static void read_final_goodbye(int f_in, int f_out)
548 if (protocol_version < 29)
551 while ((i = read_int(f_in)) == the_file_list->count
552 && read_shortint(f_in) == ITEM_IS_NEW) {
553 /* Forward the keep-alive (no-op) to the receiver. */
554 write_int(f_out, the_file_list->count);
555 write_shortint(f_out, ITEM_IS_NEW);
560 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
562 exit_cleanup(RERR_PROTOCOL);
567 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
569 struct file_list *flist;
573 rprintf(FINFO, "server_sender starting pid=%ld\n",
577 if (am_daemon && lp_write_only(module_id)) {
578 rprintf(FERROR, "ERROR: module is write only\n");
579 exit_cleanup(RERR_SYNTAX);
582 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
584 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
585 exit_cleanup(RERR_SYNTAX);
589 if (!relative_paths && !push_dir(dir)) {
590 rsyserr(FERROR, errno, "push_dir#3 %s failed",
592 exit_cleanup(RERR_FILESELECT);
597 if (argc == 0 && (recurse || list_only)) {
603 flist = send_file_list(f_out,argc,argv);
604 if (!flist || flist->count == 0) {
607 the_file_list = flist;
609 io_start_buffering_in();
610 io_start_buffering_out();
612 send_files(flist,f_out,f_in);
613 io_flush(FULL_FLUSH);
615 if (protocol_version >= 24)
616 read_final_goodbye(f_in, f_out);
617 io_flush(FULL_FLUSH);
622 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
628 /* The receiving side mustn't obey this, or an existing symlink that
629 * points to an identical file won't be replaced by the referent. */
632 if (preserve_hard_links)
635 if (fd_pair(error_pipe) < 0) {
636 rsyserr(FERROR, errno, "pipe failed in do_recv");
637 exit_cleanup(RERR_IPC);
640 io_flush(NORMAL_FLUSH);
642 if ((pid = do_fork()) == -1) {
643 rsyserr(FERROR, errno, "fork failed in do_recv");
644 exit_cleanup(RERR_IPC);
648 close(error_pipe[0]);
652 /* we can't let two processes write to the socket at one time */
653 close_multiplexing_out();
655 /* set place to send errors */
656 set_msg_fd_out(error_pipe[1]);
658 recv_files(f_in, flist, local_name);
659 io_flush(FULL_FLUSH);
662 send_msg(MSG_DONE, "", 0);
663 io_flush(FULL_FLUSH);
665 /* Handle any keep-alive packets from the post-processing work
666 * that the generator does. */
667 if (protocol_version >= 29) {
668 kluge_around_eof = -1;
670 /* This should only get stopped via a USR2 signal. */
671 while (read_int(f_in) == flist->count
672 && read_shortint(f_in) == ITEM_IS_NEW) {}
674 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
676 exit_cleanup(RERR_PROTOCOL);
679 /* Finally, we go to sleep until our parent kills us with a
680 * USR2 signal. We sleep for a short time, as on some OSes
681 * a signal won't interrupt a sleep! */
687 close_multiplexing_in();
688 if (write_batch && !am_server)
691 close(error_pipe[1]);
695 io_start_buffering_out();
697 set_msg_fd_in(error_pipe[0]);
699 generate_files(f_out, flist, local_name);
702 io_flush(FULL_FLUSH);
703 if (protocol_version >= 24) {
704 /* send a final goodbye message */
705 write_int(f_out, -1);
707 io_flush(FULL_FLUSH);
711 wait_process_with_flush(pid, &exit_code);
716 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
719 struct file_list *flist;
720 char *local_name = NULL;
722 int save_verbose = verbose;
724 if (filesfrom_fd >= 0) {
725 /* We can't mix messages with files-from data on the socket,
726 * so temporarily turn off verbose messages. */
731 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
732 argc, (long)getpid());
735 if (am_daemon && lp_read_only(module_id)) {
736 rprintf(FERROR,"ERROR: module is read only\n");
737 exit_cleanup(RERR_SYNTAX);
745 if (!am_daemon && !push_dir(dir)) {
746 rsyserr(FERROR, errno, "push_dir#4 %s failed",
748 exit_cleanup(RERR_FILESELECT);
752 io_start_buffering_in();
753 recv_filter_list(f_in);
755 if (filesfrom_fd >= 0) {
756 /* We need to send the files-from names to the sender at the
757 * same time that we receive the file-list from them, so we
758 * need the IO routines to automatically write out the names
759 * onto our f_out socket as we read the file-list. This
760 * avoids both deadlock and extra delays/buffers. */
761 io_set_filesfrom_fds(filesfrom_fd, f_out);
765 flist = recv_file_list(f_in);
766 verbose = save_verbose;
768 rprintf(FERROR,"server_recv: recv_file_list error\n");
769 exit_cleanup(RERR_FILESELECT);
771 the_file_list = flist;
774 local_name = get_local_name(flist,argv[0]);
776 exit_code = do_recv(f_in,f_out,flist,local_name);
777 exit_cleanup(exit_code);
781 int child_main(int argc, char *argv[])
783 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
788 void start_server(int f_in, int f_out, int argc, char *argv[])
790 set_nonblocking(f_in);
791 set_nonblocking(f_out);
793 io_set_sock_fds(f_in, f_out);
794 setup_protocol(f_out, f_in);
795 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
799 if (protocol_version >= 23)
800 io_start_multiplex_out();
803 keep_dirlinks = 0; /* Must be disabled on the sender. */
804 if (need_messages_from_generator)
805 io_start_multiplex_in();
807 recv_filter_list(f_in);
808 do_server_sender(f_in, f_out, argc, argv);
810 do_server_recv(f_in, f_out, argc, argv);
817 * This is called once the connection has been negotiated. It is used
818 * for rsyncd, remote-shell, and local connections.
820 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
822 struct file_list *flist = NULL;
823 int exit_code = 0, exit_code2 = 0;
824 char *local_name = NULL;
826 cleanup_child_pid = pid;
828 set_nonblocking(f_in);
829 set_nonblocking(f_out);
832 io_set_sock_fds(f_in, f_out);
833 setup_protocol(f_out,f_in);
834 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
838 if (protocol_version >= 23 && !read_batch)
839 io_start_multiplex_in();
841 /* We set our stderr file handle to blocking because ssh might have
842 * set it to non-blocking. This can be particularly troublesome if
843 * stderr is a clone of stdout, because ssh would have set our stdout
844 * to non-blocking at the same time (which can easily cause us to lose
845 * output from our print statements). This kluge shouldn't cause ssh
846 * any problems for how we use it. Note also that we delayed setting
847 * this until after the above protocol setup so that we know for sure
848 * that ssh is done twiddling its file descriptors. */
849 set_blocking(STDERR_FILENO);
852 keep_dirlinks = 0; /* Must be disabled on the sender. */
853 io_start_buffering_out();
856 send_filter_list(f_out);
860 if (write_batch && !am_server)
861 start_write_batch(f_out);
862 flist = send_file_list(f_out, argc, argv);
865 rprintf(FINFO,"file list sent\n");
866 the_file_list = flist;
868 io_flush(NORMAL_FLUSH);
869 send_files(flist,f_out,f_in);
870 io_flush(FULL_FLUSH);
872 if (protocol_version >= 24)
873 read_final_goodbye(f_in, f_out);
876 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
877 io_flush(FULL_FLUSH);
878 wait_process_with_flush(pid, &exit_code);
881 io_flush(FULL_FLUSH);
882 exit_cleanup(exit_code);
885 if (need_messages_from_generator && !read_batch)
886 io_start_multiplex_out();
891 send_filter_list(read_batch ? -1 : f_out);
893 if (filesfrom_fd >= 0) {
894 io_set_filesfrom_fds(filesfrom_fd, f_out);
898 if (write_batch && !am_server)
899 start_write_batch(f_in);
900 flist = recv_file_list(f_in);
901 the_file_list = flist;
903 if (flist && flist->count > 0) {
904 local_name = get_local_name(flist, argv[0]);
906 exit_code2 = do_recv(f_in, f_out, flist, local_name);
914 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
915 io_flush(FULL_FLUSH);
916 wait_process_with_flush(pid, &exit_code);
919 return MAX(exit_code, exit_code2);
922 static int copy_argv (char *argv[])
926 for (i = 0; argv[i]; i++) {
927 if (!(argv[i] = strdup(argv[i]))) {
928 rprintf (FERROR, "out of memory at %s(%d)\n",
939 * Start a client for either type of remote connection. Work out
940 * whether the arguments request a remote shell or rsyncd connection,
941 * and call the appropriate connection function, then run_client.
943 * Calls either start_socket_client (for sockets) or do_cmd and
944 * client_run (for ssh).
946 static int start_client(int argc, char *argv[])
949 char *shell_machine = NULL;
950 char *shell_path = NULL;
951 char *shell_user = NULL;
957 /* Don't clobber argv[] so that ps(1) can still show the right
959 if ((rc = copy_argv(argv)))
962 if (!read_batch) { /* for read_batch, NO source is specified */
964 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
965 if (shell_path) { /* source is remote */
968 if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
970 "The source and destination cannot both be remote.\n");
971 exit_cleanup(RERR_SYNTAX);
974 if (filesfrom_host && *filesfrom_host
975 && strcmp(filesfrom_host, shell_machine) != 0) {
977 "--files-from hostname is not the same as the transfer hostname\n");
978 exit_cleanup(RERR_SYNTAX);
982 return start_socket_client(shell_machine,
990 } else { /* source is local, check dest arg */
993 if (argc < 1) { /* destination required */
995 exit_cleanup(RERR_SYNTAX);
998 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
999 if (shell_path && filesfrom_host && *filesfrom_host
1000 && strcmp(filesfrom_host, shell_machine) != 0) {
1002 "--files-from hostname is not the same as the transfer hostname\n");
1003 exit_cleanup(RERR_SYNTAX);
1005 if (!shell_path) { /* no hostspec found, so src & dest are local */
1007 if (filesfrom_host) {
1009 "--files-from cannot be remote when the transfer is local\n");
1010 exit_cleanup(RERR_SYNTAX);
1012 shell_machine = NULL;
1013 shell_path = argv[argc];
1014 } else if (rsync_port) {
1016 return start_socket_client(shell_machine,
1020 daemon_over_rsh = 1;
1023 } else { /* read_batch */
1025 shell_path = argv[argc-1];
1026 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1027 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1028 exit_cleanup(RERR_SYNTAX);
1032 if (shell_machine) {
1033 p = strrchr(shell_machine,'@');
1036 shell_user = shell_machine;
1037 shell_machine = p+1;
1042 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1043 shell_cmd ? shell_cmd : "",
1044 shell_machine ? shell_machine : "",
1045 shell_user ? shell_user : "",
1046 shell_path ? shell_path : "");
1049 /* for remote source, only single dest arg can remain ... */
1050 if (!am_sender && argc > 1) {
1052 exit_cleanup(RERR_SYNTAX);
1055 /* ... or no dest at all */
1056 if (!am_sender && argc == 0)
1059 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1062 /* if we're running an rsync server on the remote host over a
1063 * remote shell command, we need to do the RSYNCD protocol first */
1064 if (daemon_over_rsh) {
1066 tmpret = start_inband_exchange(shell_user, shell_path,
1072 ret = client_run(f_in, f_out, pid, argc, argv);
1081 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1083 exit_cleanup(RERR_SIGNAL1);
1086 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1092 _exit(RERR_PARTIAL);
1096 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1101 /* An empty waitpid() loop was put here by Tridge and we could never
1102 * get him to explain why he put it in, so rather than taking it
1103 * out we're instead saving the child exit statuses for later use.
1104 * The waitpid() loop presumably eliminates all possibility of leaving
1105 * zombie children, maybe that's why he did it. */
1106 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1107 /* save the child's exit status */
1108 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1109 if (pid_stat_table[cnt].pid == 0) {
1110 pid_stat_table[cnt].pid = pid;
1111 pid_stat_table[cnt].status = status;
1117 #ifndef HAVE_SIGACTION
1118 signal(SIGCHLD, sigchld_handler);
1124 * This routine catches signals and tries to send them to gdb.
1126 * Because it's called from inside a signal handler it ought not to
1127 * use too many library routines.
1129 * @todo Perhaps use "screen -X" instead/as well, to help people
1130 * debugging without easy access to X. Perhaps use an environment
1131 * variable, or just call a script?
1133 * @todo The /proc/ magic probably only works on Linux (and
1134 * Solaris?) Can we be more portable?
1136 #ifdef MAINTAINER_MODE
1137 const char *get_panic_action(void)
1139 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1144 return "xterm -display :0 -T Panic -n Panic "
1145 "-e gdb /proc/%d/exe %d";
1150 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1152 * This signal handler is only installed if we were configured with
1153 * --enable-maintainer-mode. Perhaps it should always be on and we
1154 * should just look at the environment variable, but I'm a bit leery
1155 * of a signal sending us into a busy loop.
1157 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1162 sprintf(cmd_buf, get_panic_action(),
1163 getpid(), getpid());
1165 /* Unless we failed to execute gdb, we allow the process to
1166 * continue. I'm not sure if that's right. */
1167 ret = system(cmd_buf);
1174 int main(int argc,char *argv[])
1177 int orig_argc = argc;
1178 char **orig_argv = argv;
1179 #ifdef HAVE_SIGACTION
1180 # ifdef HAVE_SIGPROCMASK
1183 sigemptyset(&sigmask);
1185 sigact.sa_flags = SA_NOCLDSTOP;
1187 SIGACTMASK(SIGUSR1, sigusr1_handler);
1188 SIGACTMASK(SIGUSR2, sigusr2_handler);
1189 SIGACTMASK(SIGCHLD, sigchld_handler);
1190 #ifdef MAINTAINER_MODE
1191 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1192 SIGACTMASK(SIGFPE, rsync_panic_handler);
1193 SIGACTMASK(SIGABRT, rsync_panic_handler);
1194 SIGACTMASK(SIGBUS, rsync_panic_handler);
1197 starttime = time(NULL);
1198 am_root = (MY_UID() == 0);
1200 memset(&stats, 0, sizeof(stats));
1204 exit_cleanup(RERR_SYNTAX);
1207 /* we set a 0 umask so that correct file permissions can be
1209 orig_umask = (int)umask(0);
1211 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1212 setlocale(LC_CTYPE, "");
1215 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1216 /* FIXME: We ought to call the same error-handling
1217 * code here, rather than relying on getopt. */
1219 exit_cleanup(RERR_SYNTAX);
1222 SIGACTMASK(SIGINT, sig_int);
1223 SIGACTMASK(SIGHUP, sig_int);
1224 SIGACTMASK(SIGTERM, sig_int);
1225 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1226 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1229 /* Ignore SIGPIPE; we consistently check error codes and will
1231 SIGACTION(SIGPIPE, SIG_IGN);
1233 SIGACTION(SIGXFSZ, SIG_IGN);
1236 /* Initialize push_dir here because on some old systems getcwd
1237 * (implemented by forking "pwd" and reading its output) doesn't
1238 * work when there are other child processes. Also, on all systems
1239 * that implement getcwd that way "pwd" can't be found after chroot. */
1244 if ((write_batch || read_batch) && !am_server) {
1246 write_batch_shell_file(orig_argc, orig_argv, argc);
1248 if (read_batch && strcmp(batch_name, "-") == 0)
1249 batch_fd = STDIN_FILENO;
1251 batch_fd = do_open(batch_name,
1252 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1253 : O_RDONLY, S_IRUSR | S_IWUSR);
1256 rsyserr(FERROR, errno, "Batch file %s open error",
1257 full_fname(batch_name));
1258 exit_cleanup(RERR_FILEIO);
1261 read_stream_flags(batch_fd);
1263 if (write_batch < 0)
1266 if (am_daemon && !am_server)
1267 return daemon_main();
1271 exit_cleanup(RERR_SYNTAX);
1275 set_nonblocking(STDIN_FILENO);
1276 set_nonblocking(STDOUT_FILENO);
1278 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1279 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1282 ret = start_client(argc, argv);
1284 exit_cleanup(RERR_STARTCLIENT);