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
74 } pid_stat_table[MAXCHILDPROCS];
76 static time_t starttime, endtime;
77 static int64 total_read, total_written;
79 static void show_malloc_stats(void);
81 /* Works like waitpid(), but if we already harvested the child pid in our
82 * sigchld_handler(), we succeed instead of returning an error. */
83 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
85 pid_t waited_pid = waitpid(pid, status_ptr, flags);
87 if (waited_pid == -1 && errno == ECHILD) {
88 /* Status of requested child no longer available: check to
89 * see if it was processed by sigchld_handler(). */
91 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
92 if (pid == pid_stat_table[cnt].pid) {
93 *status_ptr = pid_stat_table[cnt].status;
94 pid_stat_table[cnt].pid = 0;
103 /* Wait for a process to exit, calling io_flush while waiting. */
104 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
109 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
111 io_flush(FULL_FLUSH);
114 /* TODO: If the child exited on a signal, then log an
115 * appropriate error message. Perhaps we should also accept a
116 * message describing the purpose of the child. Also indicate
117 * this to the caller so that they know something went wrong. */
118 if (waited_pid < 0) {
119 rsyserr(FERROR, errno, "waitpid");
120 *exit_code_ptr = RERR_WAITCHILD;
121 } else if (!WIFEXITED(status)) {
123 if (WCOREDUMP(status))
124 *exit_code_ptr = RERR_CRASHED;
127 if (WIFSIGNALED(status))
128 *exit_code_ptr = RERR_TERMINATED;
130 *exit_code_ptr = RERR_WAITCHILD;
132 *exit_code_ptr = WEXITSTATUS(status);
135 /* This function gets called from all 3 processes. We want the client side
136 * to actually output the text, but the sender is the only process that has
137 * all the stats we need. So, if we're a client sender, we do the report.
138 * If we're a server sender, we write the stats on the supplied fd. If
139 * we're the client receiver we read the stats from the supplied fd and do
140 * the report. All processes might also generate a set of debug stats, if
141 * the verbose level is high enough (this is the only thing that the
142 * generator process and the server receiver ever do here). */
143 static void handle_stats(int f)
145 endtime = time(NULL);
147 /* Cache two stats because the read/write code can change it. */
148 total_read = stats.total_read;
149 total_written = stats.total_written;
151 if (do_stats && verbose > 1) {
152 /* These come out from every process */
161 log_exit(0, __FILE__, __LINE__);
162 if (f == -1 || !am_sender)
168 write_longint(f, total_read);
169 write_longint(f, total_written);
170 write_longint(f, stats.total_size);
171 if (protocol_version >= 29) {
172 write_longint(f, stats.flist_buildtime);
173 write_longint(f, stats.flist_xfertime);
179 /* this is the client */
181 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
183 else if (!am_sender) {
184 /* Read the first two in opposite order because the meaning of
185 * read/write swaps when switching from sender to receiver. */
186 total_written = read_longint(f);
187 total_read = read_longint(f);
188 stats.total_size = read_longint(f);
189 if (protocol_version >= 29) {
190 stats.flist_buildtime = read_longint(f);
191 stats.flist_xfertime = read_longint(f);
193 } else if (write_batch) {
194 /* The --read-batch process is going to be a client
195 * receiver, so we need to give it the stats. */
196 write_longint(batch_fd, total_read);
197 write_longint(batch_fd, total_written);
198 write_longint(batch_fd, stats.total_size);
199 if (protocol_version >= 29) {
200 write_longint(batch_fd, stats.flist_buildtime);
201 write_longint(batch_fd, stats.flist_xfertime);
206 static void output_summary(void)
209 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
210 rprintf(FINFO,"Number of files transferred: %d\n",
211 stats.num_transferred_files);
212 rprintf(FINFO,"Total file size: %s bytes\n",
213 human_num(stats.total_size));
214 rprintf(FINFO,"Total transferred file size: %s bytes\n",
215 human_num(stats.total_transferred_size));
216 rprintf(FINFO,"Literal data: %s bytes\n",
217 human_num(stats.literal_data));
218 rprintf(FINFO,"Matched data: %s bytes\n",
219 human_num(stats.matched_data));
220 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
221 if (stats.flist_buildtime) {
223 "File list generation time: %.3f seconds\n",
224 (double)stats.flist_buildtime / 1000);
226 "File list transfer time: %.3f seconds\n",
227 (double)stats.flist_xfertime / 1000);
229 rprintf(FINFO,"Total bytes sent: %s\n",
230 human_num(total_written));
231 rprintf(FINFO,"Total bytes received: %s\n",
232 human_num(total_read));
235 if (verbose || do_stats) {
237 "\nsent %s bytes received %s bytes %s bytes/sec\n",
238 human_num(total_written), human_num(total_read),
239 human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
240 rprintf(FINFO, "total size is %s speedup is %.2f\n",
241 human_num(stats.total_size),
242 (double)stats.total_size / (total_written+total_read));
251 * If our C library can get malloc statistics, then show them to FINFO
253 static void show_malloc_stats(void)
260 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
261 getpid(), am_server ? "server " : "",
262 am_daemon ? "daemon " : "", who_am_i());
263 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
265 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
267 rprintf(FINFO, " smblks: %10ld\n",
269 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
271 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
273 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
274 (long)mi.arena + mi.hblkhd);
275 rprintf(FINFO, " usmblks: %10ld\n",
277 rprintf(FINFO, " fsmblks: %10ld\n",
279 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
281 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
283 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
285 #endif /* HAVE_MALLINFO */
289 /* Start the remote shell. cmd may be NULL to use the default. */
290 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
291 int *f_in, int *f_out)
294 char *args[MAX_ARGS];
299 if (!read_batch && !local_server) {
300 char *t, *f, in_quote = '\0';
301 char *rsh_env = getenv(RSYNC_RSH_ENV);
310 for (t = f = cmd; *f; f++) {
313 /* Comparison leaves rooms for server_options(). */
314 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
315 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
316 exit_cleanup(RERR_SYNTAX);
319 while (*f != ' ' || in_quote) {
323 "Missing trailing-%c in remote-shell command.\n",
325 exit_cleanup(RERR_SYNTAX);
330 if (*f == '\'' || *f == '"') {
335 if (*f == in_quote && *++f != in_quote) {
345 /* check to see if we've already been given '-l user' in
346 * the remote-shell command */
347 for (i = 0; i < argc-1; i++) {
348 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
353 /* remsh (on HPUX) takes the arguments the other way around */
354 args[argc++] = machine;
355 if (user && !(daemon_over_rsh && dash_l_set)) {
360 if (user && !(daemon_over_rsh && dash_l_set)) {
364 args[argc++] = machine;
367 args[argc++] = rsync_path;
369 if (blocking_io < 0) {
371 if ((cp = strrchr(cmd, '/')) != NULL)
375 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
379 server_options(args,&argc);
381 if (argc >= MAX_ARGS - 2) {
382 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
383 exit_cleanup(RERR_SYNTAX);
389 if (!daemon_over_rsh && path && *path)
395 for (i = 0; i < argc; i++)
396 rprintf(FINFO, "cmd[%d]=%s ", i, args[i]);
397 rprintf(FINFO, "\n");
401 int from_gen_pipe[2];
402 if (fd_pair(from_gen_pipe) < 0) {
403 rsyserr(FERROR, errno, "pipe");
404 exit_cleanup(RERR_IPC);
406 batch_gen_fd = from_gen_pipe[0];
407 *f_out = from_gen_pipe[1];
409 ret = -1; /* no child pid */
410 } else if (local_server) {
411 /* If the user didn't request --[no-]whole-file, force
412 * it on, but only if we're not batch processing. */
413 if (whole_file < 0 && !write_batch)
415 ret = local_child(argc, args, f_in, f_out, child_main);
417 ret = piped_child(args,f_in,f_out);
425 out_of_memory("do_cmd");
426 return 0; /* not reached */
429 /* The receiving side operates in one of two modes:
431 * 1. it enters a directory and receives one or more files, placing them
432 * according to their names in the file-list.
434 * 2. it receives a single file and saves it using the name in the
435 * destination path instead of its file-list name. This requires a
436 * "local name" for writing out the destination file.
438 * So, our task is to figure out what mode/local-name we need and return
439 * either a NULL for mode 1, or the local-name for mode 2. We also
440 * change directory if there are any path components in dest_path. */
441 static char *get_local_name(struct file_list *flist, char *dest_path)
447 rprintf(FINFO, "get_local_name count=%d %s\n",
448 flist->count, NS(dest_path));
454 /* If the destination path refers to an existing directory, enter
455 * it and use mode 1. If there is something other than a directory
456 * at the destination path, we must be transferring one file
457 * (anything at the destination will be overwritten). */
458 if (do_stat(dest_path, &st) == 0) {
459 if (S_ISDIR(st.st_mode)) {
460 if (!push_dir(dest_path)) {
461 rsyserr(FERROR, errno, "push_dir#1 %s failed",
462 full_fname(dest_path));
463 exit_cleanup(RERR_FILESELECT);
467 if (flist->count > 1) {
469 "ERROR: destination must be a directory when"
470 " copying more than 1 file\n");
471 exit_cleanup(RERR_FILESELECT);
475 cp = strrchr(dest_path, '/');
477 /* If the destination path ends in a slash or we are transferring
478 * multiple files, create a directory at the destination path,
479 * enter the new directory, and use mode 1. */
480 if (flist->count > 1 || (cp && !cp[1])) {
481 /* Lop off the final slash (if any). */
486 if (do_mkdir(dest_path, 0777) != 0) {
487 rsyserr(FERROR, errno, "mkdir %s failed",
488 full_fname(dest_path));
489 exit_cleanup(RERR_FILEIO);
494 rprintf(FINFO, "created directory %s\n", dest_path);
497 /* Indicate that the destination directory doesn't
498 * really exist and return mode 1. */
503 if (!push_dir(dest_path)) {
504 rsyserr(FERROR, errno, "push_dir#2 %s failed",
505 full_fname(dest_path));
506 exit_cleanup(RERR_FILESELECT);
512 /* Otherwise, we are writing a single file, possibly on top of an
513 * existing non-directory. Change to the item's parent directory
514 * (if it has a path component), return the basename of the
515 * destination file as the local name, and use mode 2. */
523 if (!push_dir(dest_path)) {
524 rsyserr(FERROR, errno, "push_dir#3 %s failed",
525 full_fname(dest_path));
526 exit_cleanup(RERR_FILESELECT);
534 /* This is only called by the sender. */
535 static void read_final_goodbye(int f_in, int f_out)
539 if (protocol_version < 29)
542 while ((i = read_int(f_in)) == the_file_list->count
543 && read_shortint(f_in) == ITEM_IS_NEW) {
544 /* Forward the keep-alive (no-op) to the receiver. */
545 write_int(f_out, the_file_list->count);
546 write_shortint(f_out, ITEM_IS_NEW);
551 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
553 exit_cleanup(RERR_PROTOCOL);
558 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
560 struct file_list *flist;
564 rprintf(FINFO, "server_sender starting pid=%ld\n",
568 if (am_daemon && lp_write_only(module_id)) {
569 rprintf(FERROR, "ERROR: module is write only\n");
570 exit_cleanup(RERR_SYNTAX);
573 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
575 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
576 exit_cleanup(RERR_SYNTAX);
580 if (!relative_paths && !push_dir(dir)) {
581 rsyserr(FERROR, errno, "push_dir#3 %s failed",
583 exit_cleanup(RERR_FILESELECT);
588 if (argc == 0 && (recurse || list_only)) {
594 flist = send_file_list(f_out,argc,argv);
595 if (!flist || flist->count == 0) {
598 the_file_list = flist;
600 io_start_buffering_in();
601 io_start_buffering_out();
603 send_files(flist,f_out,f_in);
604 io_flush(FULL_FLUSH);
606 if (protocol_version >= 24)
607 read_final_goodbye(f_in, f_out);
608 io_flush(FULL_FLUSH);
613 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
619 /* The receiving side mustn't obey this, or an existing symlink that
620 * points to an identical file won't be replaced by the referent. */
623 if (preserve_hard_links)
626 if (fd_pair(error_pipe) < 0) {
627 rsyserr(FERROR, errno, "pipe failed in do_recv");
628 exit_cleanup(RERR_IPC);
631 io_flush(NORMAL_FLUSH);
633 if ((pid = do_fork()) == -1) {
634 rsyserr(FERROR, errno, "fork failed in do_recv");
635 exit_cleanup(RERR_IPC);
639 close(error_pipe[0]);
643 /* we can't let two processes write to the socket at one time */
644 close_multiplexing_out();
646 /* set place to send errors */
647 set_msg_fd_out(error_pipe[1]);
649 recv_files(f_in, flist, local_name);
650 io_flush(FULL_FLUSH);
653 send_msg(MSG_DONE, "", 0);
654 io_flush(FULL_FLUSH);
656 /* Handle any keep-alive packets from the post-processing work
657 * that the generator does. */
658 if (protocol_version >= 29) {
659 kluge_around_eof = -1;
661 /* This should only get stopped via a USR2 signal. */
662 while (read_int(f_in) == flist->count
663 && read_shortint(f_in) == ITEM_IS_NEW) {}
665 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
667 exit_cleanup(RERR_PROTOCOL);
670 /* Finally, we go to sleep until our parent kills us with a
671 * USR2 signal. We sleep for a short time, as on some OSes
672 * a signal won't interrupt a sleep! */
678 close_multiplexing_in();
679 if (write_batch && !am_server)
682 close(error_pipe[1]);
686 io_start_buffering_out();
688 set_msg_fd_in(error_pipe[0]);
690 generate_files(f_out, flist, local_name);
693 io_flush(FULL_FLUSH);
694 if (protocol_version >= 24) {
695 /* send a final goodbye message */
696 write_int(f_out, -1);
698 io_flush(FULL_FLUSH);
702 wait_process_with_flush(pid, &exit_code);
707 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
710 struct file_list *flist;
711 char *local_name = NULL;
713 int save_verbose = verbose;
715 if (filesfrom_fd >= 0) {
716 /* We can't mix messages with files-from data on the socket,
717 * so temporarily turn off verbose messages. */
722 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
723 argc, (long)getpid());
726 if (am_daemon && lp_read_only(module_id)) {
727 rprintf(FERROR,"ERROR: module is read only\n");
728 exit_cleanup(RERR_SYNTAX);
736 if (!am_daemon && !push_dir(dir)) {
737 rsyserr(FERROR, errno, "push_dir#4 %s failed",
739 exit_cleanup(RERR_FILESELECT);
743 io_start_buffering_in();
744 recv_filter_list(f_in);
746 if (filesfrom_fd >= 0) {
747 /* We need to send the files-from names to the sender at the
748 * same time that we receive the file-list from them, so we
749 * need the IO routines to automatically write out the names
750 * onto our f_out socket as we read the file-list. This
751 * avoids both deadlock and extra delays/buffers. */
752 io_set_filesfrom_fds(filesfrom_fd, f_out);
756 flist = recv_file_list(f_in);
757 verbose = save_verbose;
759 rprintf(FERROR,"server_recv: recv_file_list error\n");
760 exit_cleanup(RERR_FILESELECT);
762 the_file_list = flist;
765 local_name = get_local_name(flist,argv[0]);
767 exit_code = do_recv(f_in,f_out,flist,local_name);
768 exit_cleanup(exit_code);
772 int child_main(int argc, char *argv[])
774 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
779 void start_server(int f_in, int f_out, int argc, char *argv[])
781 set_nonblocking(f_in);
782 set_nonblocking(f_out);
784 io_set_sock_fds(f_in, f_out);
785 setup_protocol(f_out, f_in);
787 if (protocol_version >= 23)
788 io_start_multiplex_out();
791 keep_dirlinks = 0; /* Must be disabled on the sender. */
792 if (need_messages_from_generator)
793 io_start_multiplex_in();
795 recv_filter_list(f_in);
796 do_server_sender(f_in, f_out, argc, argv);
798 do_server_recv(f_in, f_out, argc, argv);
805 * This is called once the connection has been negotiated. It is used
806 * for rsyncd, remote-shell, and local connections.
808 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
810 struct file_list *flist = NULL;
811 int exit_code = 0, exit_code2 = 0;
812 char *local_name = NULL;
814 cleanup_child_pid = pid;
816 set_nonblocking(f_in);
817 set_nonblocking(f_out);
820 io_set_sock_fds(f_in, f_out);
821 setup_protocol(f_out,f_in);
823 if (protocol_version >= 23 && !read_batch)
824 io_start_multiplex_in();
826 /* We set our stderr file handle to blocking because ssh might have
827 * set it to non-blocking. This can be particularly troublesome if
828 * stderr is a clone of stdout, because ssh would have set our stdout
829 * to non-blocking at the same time (which can easily cause us to lose
830 * output from our print statements). This kluge shouldn't cause ssh
831 * any problems for how we use it. Note also that we delayed setting
832 * this until after the above protocol setup so that we know for sure
833 * that ssh is done twiddling its file descriptors. */
834 set_blocking(STDERR_FILENO);
837 keep_dirlinks = 0; /* Must be disabled on the sender. */
838 io_start_buffering_out();
841 send_filter_list(f_out);
845 if (write_batch && !am_server)
846 start_write_batch(f_out);
847 flist = send_file_list(f_out, argc, argv);
850 rprintf(FINFO,"file list sent\n");
851 the_file_list = flist;
853 io_flush(NORMAL_FLUSH);
854 send_files(flist,f_out,f_in);
855 io_flush(FULL_FLUSH);
857 if (protocol_version >= 24)
858 read_final_goodbye(f_in, f_out);
861 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
862 io_flush(FULL_FLUSH);
863 wait_process_with_flush(pid, &exit_code);
866 io_flush(FULL_FLUSH);
867 exit_cleanup(exit_code);
870 if (need_messages_from_generator && !read_batch)
871 io_start_multiplex_out();
876 send_filter_list(read_batch ? -1 : f_out);
878 if (filesfrom_fd >= 0) {
879 io_set_filesfrom_fds(filesfrom_fd, f_out);
883 if (write_batch && !am_server)
884 start_write_batch(f_in);
885 flist = recv_file_list(f_in);
886 the_file_list = flist;
888 if (flist && flist->count > 0) {
889 local_name = get_local_name(flist, argv[0]);
891 exit_code2 = do_recv(f_in, f_out, flist, local_name);
899 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
900 io_flush(FULL_FLUSH);
901 wait_process_with_flush(pid, &exit_code);
904 return MAX(exit_code, exit_code2);
907 static int copy_argv (char *argv[])
911 for (i = 0; argv[i]; i++) {
912 if (!(argv[i] = strdup(argv[i]))) {
913 rprintf (FERROR, "out of memory at %s(%d)\n",
924 * Start a client for either type of remote connection. Work out
925 * whether the arguments request a remote shell or rsyncd connection,
926 * and call the appropriate connection function, then run_client.
928 * Calls either start_socket_client (for sockets) or do_cmd and
929 * client_run (for ssh).
931 static int start_client(int argc, char *argv[])
934 char *shell_machine = NULL;
935 char *shell_path = NULL;
936 char *shell_user = NULL;
942 /* Don't clobber argv[] so that ps(1) can still show the right
944 if ((rc = copy_argv(argv)))
947 if (!read_batch) { /* for read_batch, NO source is specified */
949 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
950 if (shell_path) { /* source is remote */
953 if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
955 "The source and destination cannot both be remote.\n");
956 exit_cleanup(RERR_SYNTAX);
959 if (filesfrom_host && *filesfrom_host
960 && strcmp(filesfrom_host, shell_machine) != 0) {
962 "--files-from hostname is not the same as the transfer hostname\n");
963 exit_cleanup(RERR_SYNTAX);
967 return start_socket_client(shell_machine,
975 } else { /* source is local, check dest arg */
978 if (argc < 1) { /* destination required */
980 exit_cleanup(RERR_SYNTAX);
983 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
984 if (shell_path && filesfrom_host && *filesfrom_host
985 && strcmp(filesfrom_host, shell_machine) != 0) {
987 "--files-from hostname is not the same as the transfer hostname\n");
988 exit_cleanup(RERR_SYNTAX);
990 if (!shell_path) { /* no hostspec found, so src & dest are local */
992 if (filesfrom_host) {
994 "--files-from cannot be remote when the transfer is local\n");
995 exit_cleanup(RERR_SYNTAX);
997 shell_machine = NULL;
998 shell_path = argv[argc];
999 } else if (rsync_port) {
1001 return start_socket_client(shell_machine,
1005 daemon_over_rsh = 1;
1008 } else { /* read_batch */
1010 shell_path = argv[argc-1];
1011 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1012 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1013 exit_cleanup(RERR_SYNTAX);
1017 if (shell_machine) {
1018 p = strrchr(shell_machine,'@');
1021 shell_user = shell_machine;
1022 shell_machine = p+1;
1027 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1028 shell_cmd ? shell_cmd : "",
1029 shell_machine ? shell_machine : "",
1030 shell_user ? shell_user : "",
1031 shell_path ? shell_path : "");
1034 /* for remote source, only single dest arg can remain ... */
1035 if (!am_sender && argc > 1) {
1037 exit_cleanup(RERR_SYNTAX);
1040 /* ... or no dest at all */
1041 if (!am_sender && argc == 0)
1044 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1047 /* if we're running an rsync server on the remote host over a
1048 * remote shell command, we need to do the RSYNCD protocol first */
1049 if (daemon_over_rsh) {
1051 tmpret = start_inband_exchange(shell_user, shell_path,
1057 ret = client_run(f_in, f_out, pid, argc, argv);
1066 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1068 exit_cleanup(RERR_SIGNAL1);
1071 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1077 _exit(RERR_PARTIAL);
1081 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1086 /* An empty waitpid() loop was put here by Tridge and we could never
1087 * get him to explain why he put it in, so rather than taking it
1088 * out we're instead saving the child exit statuses for later use.
1089 * The waitpid() loop presumably eliminates all possibility of leaving
1090 * zombie children, maybe that's why he did it. */
1091 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1092 /* save the child's exit status */
1093 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1094 if (pid_stat_table[cnt].pid == 0) {
1095 pid_stat_table[cnt].pid = pid;
1096 pid_stat_table[cnt].status = status;
1102 signal(SIGCHLD, sigchld_handler);
1107 * This routine catches signals and tries to send them to gdb.
1109 * Because it's called from inside a signal handler it ought not to
1110 * use too many library routines.
1112 * @todo Perhaps use "screen -X" instead/as well, to help people
1113 * debugging without easy access to X. Perhaps use an environment
1114 * variable, or just call a script?
1116 * @todo The /proc/ magic probably only works on Linux (and
1117 * Solaris?) Can we be more portable?
1119 #ifdef MAINTAINER_MODE
1120 const char *get_panic_action(void)
1122 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1127 return "xterm -display :0 -T Panic -n Panic "
1128 "-e gdb /proc/%d/exe %d";
1133 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1135 * This signal handler is only installed if we were configured with
1136 * --enable-maintainer-mode. Perhaps it should always be on and we
1137 * should just look at the environment variable, but I'm a bit leery
1138 * of a signal sending us into a busy loop.
1140 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1145 sprintf(cmd_buf, get_panic_action(),
1146 getpid(), getpid());
1148 /* Unless we failed to execute gdb, we allow the process to
1149 * continue. I'm not sure if that's right. */
1150 ret = system(cmd_buf);
1157 int main(int argc,char *argv[])
1160 int orig_argc = argc;
1161 char **orig_argv = argv;
1163 signal(SIGUSR1, sigusr1_handler);
1164 signal(SIGUSR2, sigusr2_handler);
1165 signal(SIGCHLD, sigchld_handler);
1166 #ifdef MAINTAINER_MODE
1167 signal(SIGSEGV, rsync_panic_handler);
1168 signal(SIGFPE, rsync_panic_handler);
1169 signal(SIGABRT, rsync_panic_handler);
1170 signal(SIGBUS, rsync_panic_handler);
1171 #endif /* def MAINTAINER_MODE */
1173 starttime = time(NULL);
1174 am_root = (MY_UID() == 0);
1176 memset(&stats, 0, sizeof(stats));
1180 exit_cleanup(RERR_SYNTAX);
1183 /* we set a 0 umask so that correct file permissions can be
1185 orig_umask = (int)umask(0);
1187 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1188 setlocale(LC_CTYPE, "");
1191 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1192 /* FIXME: We ought to call the same error-handling
1193 * code here, rather than relying on getopt. */
1195 exit_cleanup(RERR_SYNTAX);
1198 signal(SIGINT,SIGNAL_CAST sig_int);
1199 signal(SIGHUP,SIGNAL_CAST sig_int);
1200 signal(SIGTERM,SIGNAL_CAST sig_int);
1202 /* Ignore SIGPIPE; we consistently check error codes and will
1204 signal(SIGPIPE, SIG_IGN);
1206 /* Initialize push_dir here because on some old systems getcwd
1207 * (implemented by forking "pwd" and reading its output) doesn't
1208 * work when there are other child processes. Also, on all systems
1209 * that implement getcwd that way "pwd" can't be found after chroot. */
1214 if ((write_batch || read_batch) && !am_server) {
1216 write_batch_shell_file(orig_argc, orig_argv, argc);
1218 if (read_batch && strcmp(batch_name, "-") == 0)
1219 batch_fd = STDIN_FILENO;
1221 batch_fd = do_open(batch_name,
1222 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1223 : O_RDONLY, S_IRUSR | S_IWUSR);
1226 rsyserr(FERROR, errno, "Batch file %s open error",
1227 full_fname(batch_name));
1228 exit_cleanup(RERR_FILEIO);
1231 read_stream_flags(batch_fd);
1233 if (write_batch < 0)
1236 if (am_daemon && !am_server)
1237 return daemon_main();
1241 exit_cleanup(RERR_SYNTAX);
1245 set_nonblocking(STDIN_FILENO);
1246 set_nonblocking(STDOUT_FILENO);
1248 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1249 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1252 ret = start_client(argc, argv);
1254 exit_cleanup(RERR_STARTCLIENT);