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 copy_links;
44 extern int copy_dirlinks;
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 mode_t orig_umask = 0;
66 struct file_list *the_file_list;
68 /* There's probably never more than at most 2 outstanding child processes,
69 * but set it higher, just in case. */
70 #define MAXCHILDPROCS 7
73 # ifdef HAVE_SIGPROCMASK
74 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
76 # define SIGACTMASK(n,h) SIGACTION(n,h)
78 static struct sigaction sigact;
84 } pid_stat_table[MAXCHILDPROCS];
86 static time_t starttime, endtime;
87 static int64 total_read, total_written;
89 static void show_malloc_stats(void);
91 /* Works like waitpid(), but if we already harvested the child pid in our
92 * remember_children(), we succeed instead of returning an error. */
93 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
95 pid_t waited_pid = waitpid(pid, status_ptr, flags);
97 if (waited_pid == -1 && errno == ECHILD) {
98 /* Status of requested child no longer available: check to
99 * see if it was processed by remember_children(). */
101 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
102 if (pid == pid_stat_table[cnt].pid) {
103 *status_ptr = pid_stat_table[cnt].status;
104 pid_stat_table[cnt].pid = 0;
113 /* Wait for a process to exit, calling io_flush while waiting. */
114 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
119 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
121 io_flush(FULL_FLUSH);
124 /* TODO: If the child exited on a signal, then log an
125 * appropriate error message. Perhaps we should also accept a
126 * message describing the purpose of the child. Also indicate
127 * this to the caller so that they know something went wrong. */
128 if (waited_pid < 0) {
129 rsyserr(FERROR, errno, "waitpid");
130 *exit_code_ptr = RERR_WAITCHILD;
131 } else if (!WIFEXITED(status)) {
133 if (WCOREDUMP(status))
134 *exit_code_ptr = RERR_CRASHED;
137 if (WIFSIGNALED(status))
138 *exit_code_ptr = RERR_TERMINATED;
140 *exit_code_ptr = RERR_WAITCHILD;
142 *exit_code_ptr = WEXITSTATUS(status);
145 /* This function gets called from all 3 processes. We want the client side
146 * to actually output the text, but the sender is the only process that has
147 * all the stats we need. So, if we're a client sender, we do the report.
148 * If we're a server sender, we write the stats on the supplied fd. If
149 * we're the client receiver we read the stats from the supplied fd and do
150 * the report. All processes might also generate a set of debug stats, if
151 * the verbose level is high enough (this is the only thing that the
152 * generator process and the server receiver ever do here). */
153 static void handle_stats(int f)
155 endtime = time(NULL);
157 /* Cache two stats because the read/write code can change it. */
158 total_read = stats.total_read;
159 total_written = stats.total_written;
161 if (do_stats && verbose > 1) {
162 /* These come out from every process */
171 log_exit(0, __FILE__, __LINE__);
172 if (f == -1 || !am_sender)
178 write_longint(f, total_read);
179 write_longint(f, total_written);
180 write_longint(f, stats.total_size);
181 if (protocol_version >= 29) {
182 write_longint(f, stats.flist_buildtime);
183 write_longint(f, stats.flist_xfertime);
189 /* this is the client */
191 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
193 else if (!am_sender) {
194 /* Read the first two in opposite order because the meaning of
195 * read/write swaps when switching from sender to receiver. */
196 total_written = read_longint(f);
197 total_read = read_longint(f);
198 stats.total_size = read_longint(f);
199 if (protocol_version >= 29) {
200 stats.flist_buildtime = read_longint(f);
201 stats.flist_xfertime = read_longint(f);
203 } else if (write_batch) {
204 /* The --read-batch process is going to be a client
205 * receiver, so we need to give it the stats. */
206 write_longint(batch_fd, total_read);
207 write_longint(batch_fd, total_written);
208 write_longint(batch_fd, stats.total_size);
209 if (protocol_version >= 29) {
210 write_longint(batch_fd, stats.flist_buildtime);
211 write_longint(batch_fd, stats.flist_xfertime);
216 static void output_summary(void)
219 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
220 rprintf(FINFO,"Number of files transferred: %d\n",
221 stats.num_transferred_files);
222 rprintf(FINFO,"Total file size: %s bytes\n",
223 human_num(stats.total_size));
224 rprintf(FINFO,"Total transferred file size: %s bytes\n",
225 human_num(stats.total_transferred_size));
226 rprintf(FINFO,"Literal data: %s bytes\n",
227 human_num(stats.literal_data));
228 rprintf(FINFO,"Matched data: %s bytes\n",
229 human_num(stats.matched_data));
230 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
231 if (stats.flist_buildtime) {
233 "File list generation time: %.3f seconds\n",
234 (double)stats.flist_buildtime / 1000);
236 "File list transfer time: %.3f seconds\n",
237 (double)stats.flist_xfertime / 1000);
239 rprintf(FINFO,"Total bytes sent: %s\n",
240 human_num(total_written));
241 rprintf(FINFO,"Total bytes received: %s\n",
242 human_num(total_read));
245 if (verbose || do_stats) {
247 "\nsent %s bytes received %s bytes %s bytes/sec\n",
248 human_num(total_written), human_num(total_read),
249 human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
250 rprintf(FINFO, "total size is %s speedup is %.2f\n",
251 human_num(stats.total_size),
252 (double)stats.total_size / (total_written+total_read));
261 * If our C library can get malloc statistics, then show them to FINFO
263 static void show_malloc_stats(void)
270 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
271 getpid(), am_server ? "server " : "",
272 am_daemon ? "daemon " : "", who_am_i());
273 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
275 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
277 rprintf(FINFO, " smblks: %10ld\n",
279 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
281 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
283 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
284 (long)mi.arena + mi.hblkhd);
285 rprintf(FINFO, " usmblks: %10ld\n",
287 rprintf(FINFO, " fsmblks: %10ld\n",
289 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
291 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
293 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
295 #endif /* HAVE_MALLINFO */
299 /* Start the remote shell. cmd may be NULL to use the default. */
300 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
301 int *f_in, int *f_out)
304 char *args[MAX_ARGS];
309 if (!read_batch && !local_server) {
310 char *t, *f, in_quote = '\0';
311 char *rsh_env = getenv(RSYNC_RSH_ENV);
320 for (t = f = cmd; *f; f++) {
323 /* Comparison leaves rooms for server_options(). */
324 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
325 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
326 exit_cleanup(RERR_SYNTAX);
329 while (*f != ' ' || in_quote) {
333 "Missing trailing-%c in remote-shell command.\n",
335 exit_cleanup(RERR_SYNTAX);
340 if (*f == '\'' || *f == '"') {
345 if (*f == in_quote && *++f != in_quote) {
355 /* check to see if we've already been given '-l user' in
356 * the remote-shell command */
357 for (i = 0; i < argc-1; i++) {
358 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
363 /* remsh (on HPUX) takes the arguments the other way around */
364 args[argc++] = machine;
365 if (user && !(daemon_over_rsh && dash_l_set)) {
370 if (user && !(daemon_over_rsh && dash_l_set)) {
374 args[argc++] = machine;
377 args[argc++] = rsync_path;
379 if (blocking_io < 0) {
381 if ((cp = strrchr(cmd, '/')) != NULL)
385 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
389 server_options(args,&argc);
391 if (argc >= MAX_ARGS - 2) {
392 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
393 exit_cleanup(RERR_SYNTAX);
399 if (!daemon_over_rsh && path && *path)
405 for (i = 0; i < argc; i++)
406 rprintf(FINFO, "cmd[%d]=%s ", i, args[i]);
407 rprintf(FINFO, "\n");
411 int from_gen_pipe[2];
412 if (fd_pair(from_gen_pipe) < 0) {
413 rsyserr(FERROR, errno, "pipe");
414 exit_cleanup(RERR_IPC);
416 batch_gen_fd = from_gen_pipe[0];
417 *f_out = from_gen_pipe[1];
419 ret = -1; /* no child pid */
420 } else if (local_server) {
421 /* If the user didn't request --[no-]whole-file, force
422 * it on, but only if we're not batch processing. */
423 if (whole_file < 0 && !write_batch)
425 ret = local_child(argc, args, f_in, f_out, child_main);
427 ret = piped_child(args,f_in,f_out);
435 out_of_memory("do_cmd");
436 return 0; /* not reached */
439 /* The receiving side operates in one of two modes:
441 * 1. it receives any number of files into a destination directory,
442 * placing them according to their names in the file-list.
444 * 2. it receives a single file and saves it using the name in the
445 * destination path instead of its file-list name. This requires a
446 * "local name" for writing out the destination file.
448 * So, our task is to figure out what mode/local-name we need and return
449 * either a NULL for mode 1, or the local-name for mode 2. We also
450 * change directory if there are any path components in dest_path. */
451 static char *get_local_name(struct file_list *flist, char *dest_path)
457 rprintf(FINFO, "get_local_name count=%d %s\n",
458 flist->count, NS(dest_path));
461 if (!dest_path || list_only)
464 /* If the destination path refers to an existing directory, enter
465 * it and use mode 1. If there is something other than a directory
466 * at the destination path, we must be transferring one file
467 * (anything at the destination will be overwritten). */
468 if (do_stat(dest_path, &st) == 0) {
469 if (S_ISDIR(st.st_mode)) {
470 if (!push_dir(dest_path)) {
471 rsyserr(FERROR, errno, "push_dir#1 %s failed",
472 full_fname(dest_path));
473 exit_cleanup(RERR_FILESELECT);
477 if (flist->count > 1) {
479 "ERROR: destination must be a directory when"
480 " copying more than 1 file\n");
481 exit_cleanup(RERR_FILESELECT);
483 /* Caution: flist->count could be 0! */
484 if (flist->count == 1 && S_ISDIR(flist->files[0]->mode)) {
486 "ERROR: cannot overwrite non-directory"
487 " with a directory\n");
488 exit_cleanup(RERR_FILESELECT);
490 } else if (errno != ENOENT) {
491 rsyserr(FERROR, errno, "cannot stat destination %s",
492 full_fname(dest_path));
493 exit_cleanup(RERR_FILESELECT);
496 cp = strrchr(dest_path, '/');
498 /* If the destination path ends in a slash or we are transferring
499 * multiple files, create a directory at the destination path,
500 * enter the new directory, and use mode 1. */
501 if (flist->count > 1 || (cp && !cp[1])) {
502 /* Lop off the final slash (if any). */
506 if (mkdir_defmode(dest_path) != 0) {
507 rsyserr(FERROR, errno, "mkdir %s failed",
508 full_fname(dest_path));
509 exit_cleanup(RERR_FILEIO);
513 rprintf(FINFO, "created directory %s\n", dest_path);
516 /* Indicate that the destination directory doesn't
517 * really exist and return mode 1. */
522 if (!push_dir(dest_path)) {
523 rsyserr(FERROR, errno, "push_dir#2 %s failed",
524 full_fname(dest_path));
525 exit_cleanup(RERR_FILESELECT);
531 /* Otherwise, we are writing a single file, possibly on top of an
532 * existing non-directory. Change to the item's parent directory
533 * (if it has a path component), return the basename of the
534 * destination file as the local name, and use mode 2. */
542 if (!push_dir(dest_path)) {
543 rsyserr(FERROR, errno, "push_dir#3 %s failed",
544 full_fname(dest_path));
545 exit_cleanup(RERR_FILESELECT);
553 /* This is only called by the sender. */
554 static void read_final_goodbye(int f_in, int f_out)
558 if (protocol_version < 29)
561 while ((i = read_int(f_in)) == the_file_list->count
562 && read_shortint(f_in) == ITEM_IS_NEW) {
563 /* Forward the keep-alive (no-op) to the receiver. */
564 write_int(f_out, the_file_list->count);
565 write_shortint(f_out, ITEM_IS_NEW);
570 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
572 exit_cleanup(RERR_PROTOCOL);
577 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
579 struct file_list *flist;
583 rprintf(FINFO, "server_sender starting pid=%ld\n",
587 if (am_daemon && lp_write_only(module_id)) {
588 rprintf(FERROR, "ERROR: module is write only\n");
589 exit_cleanup(RERR_SYNTAX);
592 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
594 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
595 exit_cleanup(RERR_SYNTAX);
599 if (!relative_paths && !push_dir(dir)) {
600 rsyserr(FERROR, errno, "push_dir#3 %s failed",
602 exit_cleanup(RERR_FILESELECT);
607 if (argc == 0 && (recurse || list_only)) {
613 flist = send_file_list(f_out,argc,argv);
614 if (!flist || flist->count == 0) {
617 the_file_list = flist;
619 io_start_buffering_in();
620 io_start_buffering_out();
622 send_files(flist,f_out,f_in);
623 io_flush(FULL_FLUSH);
625 if (protocol_version >= 24)
626 read_final_goodbye(f_in, f_out);
627 io_flush(FULL_FLUSH);
632 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
638 /* The receiving side mustn't obey this, or an existing symlink that
639 * points to an identical file won't be replaced by the referent. */
640 copy_links = copy_dirlinks = 0;
642 if (preserve_hard_links)
645 if (fd_pair(error_pipe) < 0) {
646 rsyserr(FERROR, errno, "pipe failed in do_recv");
647 exit_cleanup(RERR_IPC);
650 io_flush(NORMAL_FLUSH);
652 if ((pid = do_fork()) == -1) {
653 rsyserr(FERROR, errno, "fork failed in do_recv");
654 exit_cleanup(RERR_IPC);
658 close(error_pipe[0]);
662 /* we can't let two processes write to the socket at one time */
663 close_multiplexing_out();
665 /* set place to send errors */
666 set_msg_fd_out(error_pipe[1]);
668 recv_files(f_in, flist, local_name);
669 io_flush(FULL_FLUSH);
672 send_msg(MSG_DONE, "", 0);
673 io_flush(FULL_FLUSH);
675 /* Handle any keep-alive packets from the post-processing work
676 * that the generator does. */
677 if (protocol_version >= 29) {
678 kluge_around_eof = -1;
680 /* This should only get stopped via a USR2 signal. */
681 while (read_int(f_in) == flist->count
682 && read_shortint(f_in) == ITEM_IS_NEW) {}
684 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
686 exit_cleanup(RERR_PROTOCOL);
689 /* Finally, we go to sleep until our parent kills us with a
690 * USR2 signal. We sleep for a short time, as on some OSes
691 * a signal won't interrupt a sleep! */
697 close_multiplexing_in();
698 if (write_batch && !am_server)
701 close(error_pipe[1]);
705 io_start_buffering_out();
707 set_msg_fd_in(error_pipe[0]);
709 generate_files(f_out, flist, local_name);
712 io_flush(FULL_FLUSH);
713 if (protocol_version >= 24) {
714 /* send a final goodbye message */
715 write_int(f_out, -1);
717 io_flush(FULL_FLUSH);
721 wait_process_with_flush(pid, &exit_code);
726 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
729 struct file_list *flist;
730 char *local_name = NULL;
732 int save_verbose = verbose;
734 if (filesfrom_fd >= 0) {
735 /* We can't mix messages with files-from data on the socket,
736 * so temporarily turn off verbose messages. */
741 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
742 argc, (long)getpid());
745 if (am_daemon && lp_read_only(module_id)) {
746 rprintf(FERROR,"ERROR: module is read only\n");
747 exit_cleanup(RERR_SYNTAX);
755 if (!am_daemon && !push_dir(dir)) {
756 rsyserr(FERROR, errno, "push_dir#4 %s failed",
758 exit_cleanup(RERR_FILESELECT);
762 io_start_buffering_in();
763 recv_filter_list(f_in);
765 if (filesfrom_fd >= 0) {
766 /* We need to send the files-from names to the sender at the
767 * same time that we receive the file-list from them, so we
768 * need the IO routines to automatically write out the names
769 * onto our f_out socket as we read the file-list. This
770 * avoids both deadlock and extra delays/buffers. */
771 io_set_filesfrom_fds(filesfrom_fd, f_out);
775 flist = recv_file_list(f_in);
776 verbose = save_verbose;
778 rprintf(FERROR,"server_recv: recv_file_list error\n");
779 exit_cleanup(RERR_FILESELECT);
781 the_file_list = flist;
784 local_name = get_local_name(flist,argv[0]);
786 exit_code = do_recv(f_in,f_out,flist,local_name);
787 exit_cleanup(exit_code);
791 int child_main(int argc, char *argv[])
793 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
798 void start_server(int f_in, int f_out, int argc, char *argv[])
800 set_nonblocking(f_in);
801 set_nonblocking(f_out);
803 io_set_sock_fds(f_in, f_out);
804 setup_protocol(f_out, f_in);
805 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
809 if (protocol_version >= 23)
810 io_start_multiplex_out();
813 keep_dirlinks = 0; /* Must be disabled on the sender. */
814 if (need_messages_from_generator)
815 io_start_multiplex_in();
817 recv_filter_list(f_in);
818 do_server_sender(f_in, f_out, argc, argv);
820 do_server_recv(f_in, f_out, argc, argv);
827 * This is called once the connection has been negotiated. It is used
828 * for rsyncd, remote-shell, and local connections.
830 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
832 struct file_list *flist = NULL;
833 int exit_code = 0, exit_code2 = 0;
834 char *local_name = NULL;
836 cleanup_child_pid = pid;
838 set_nonblocking(f_in);
839 set_nonblocking(f_out);
842 io_set_sock_fds(f_in, f_out);
843 setup_protocol(f_out,f_in);
844 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
848 if (protocol_version >= 23 && !read_batch)
849 io_start_multiplex_in();
851 /* We set our stderr file handle to blocking because ssh might have
852 * set it to non-blocking. This can be particularly troublesome if
853 * stderr is a clone of stdout, because ssh would have set our stdout
854 * to non-blocking at the same time (which can easily cause us to lose
855 * output from our print statements). This kluge shouldn't cause ssh
856 * any problems for how we use it. Note also that we delayed setting
857 * this until after the above protocol setup so that we know for sure
858 * that ssh is done twiddling its file descriptors. */
859 set_blocking(STDERR_FILENO);
862 keep_dirlinks = 0; /* Must be disabled on the sender. */
863 io_start_buffering_out();
866 send_filter_list(f_out);
870 if (write_batch && !am_server)
871 start_write_batch(f_out);
872 flist = send_file_list(f_out, argc, argv);
875 rprintf(FINFO,"file list sent\n");
876 the_file_list = flist;
878 io_flush(NORMAL_FLUSH);
879 send_files(flist,f_out,f_in);
880 io_flush(FULL_FLUSH);
882 if (protocol_version >= 24)
883 read_final_goodbye(f_in, f_out);
886 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
887 io_flush(FULL_FLUSH);
888 wait_process_with_flush(pid, &exit_code);
891 io_flush(FULL_FLUSH);
892 exit_cleanup(exit_code);
895 if (need_messages_from_generator && !read_batch)
896 io_start_multiplex_out();
901 send_filter_list(read_batch ? -1 : f_out);
903 if (filesfrom_fd >= 0) {
904 io_set_filesfrom_fds(filesfrom_fd, f_out);
908 if (write_batch && !am_server)
909 start_write_batch(f_in);
910 flist = recv_file_list(f_in);
911 the_file_list = flist;
913 if (flist && flist->count > 0) {
914 local_name = get_local_name(flist, argv[0]);
916 exit_code2 = do_recv(f_in, f_out, flist, local_name);
924 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
925 io_flush(FULL_FLUSH);
926 wait_process_with_flush(pid, &exit_code);
929 return MAX(exit_code, exit_code2);
932 static int copy_argv (char *argv[])
936 for (i = 0; argv[i]; i++) {
937 if (!(argv[i] = strdup(argv[i]))) {
938 rprintf (FERROR, "out of memory at %s(%d)\n",
949 * Start a client for either type of remote connection. Work out
950 * whether the arguments request a remote shell or rsyncd connection,
951 * and call the appropriate connection function, then run_client.
953 * Calls either start_socket_client (for sockets) or do_cmd and
954 * client_run (for ssh).
956 static int start_client(int argc, char *argv[])
959 char *shell_machine = NULL;
960 char *shell_path = NULL;
961 char *shell_user = NULL;
967 /* Don't clobber argv[] so that ps(1) can still show the right
969 if ((rc = copy_argv(argv)))
972 if (!read_batch) { /* for read_batch, NO source is specified */
973 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
974 if (shell_path) { /* source is remote */
978 && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
980 "The source and destination cannot both be remote.\n");
981 exit_cleanup(RERR_SYNTAX);
984 if (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);
992 return start_socket_client(shell_machine,
1000 } else { /* source is local, check dest arg */
1010 shell_path = check_for_hostspec(p, &shell_machine, &rsync_port);
1011 if (shell_path && filesfrom_host && *filesfrom_host
1012 && strcmp(filesfrom_host, shell_machine) != 0) {
1014 "--files-from hostname is not the same as the transfer hostname\n");
1015 exit_cleanup(RERR_SYNTAX);
1017 if (!shell_path) { /* no hostspec found, so src & dest are local */
1019 if (filesfrom_host) {
1021 "--files-from cannot be remote when the transfer is local\n");
1022 exit_cleanup(RERR_SYNTAX);
1024 shell_machine = NULL;
1026 } else if (rsync_port) {
1028 return start_socket_client(shell_machine,
1032 daemon_over_rsh = 1;
1035 } else { /* read_batch */
1037 shell_path = argv[argc-1];
1038 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1039 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1040 exit_cleanup(RERR_SYNTAX);
1044 if (shell_machine) {
1045 p = strrchr(shell_machine,'@');
1048 shell_user = shell_machine;
1049 shell_machine = p+1;
1054 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1055 shell_cmd ? shell_cmd : "",
1056 shell_machine ? shell_machine : "",
1057 shell_user ? shell_user : "",
1058 shell_path ? shell_path : "");
1061 /* for remote source, only single dest arg can remain ... */
1062 if (!am_sender && argc > 1) {
1064 exit_cleanup(RERR_SYNTAX);
1067 /* ... or no dest at all */
1068 if (!am_sender && argc == 0)
1071 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1074 /* if we're running an rsync server on the remote host over a
1075 * remote shell command, we need to do the RSYNCD protocol first */
1076 if (daemon_over_rsh) {
1078 tmpret = start_inband_exchange(shell_user, shell_path,
1084 ret = client_run(f_in, f_out, pid, argc, argv);
1093 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1095 exit_cleanup(RERR_SIGNAL1);
1098 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1104 _exit(RERR_PARTIAL);
1108 RETSIGTYPE remember_children(UNUSED(int val))
1113 /* An empty waitpid() loop was put here by Tridge and we could never
1114 * get him to explain why he put it in, so rather than taking it
1115 * out we're instead saving the child exit statuses for later use.
1116 * The waitpid() loop presumably eliminates all possibility of leaving
1117 * zombie children, maybe that's why he did it. */
1118 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1119 /* save the child's exit status */
1120 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1121 if (pid_stat_table[cnt].pid == 0) {
1122 pid_stat_table[cnt].pid = pid;
1123 pid_stat_table[cnt].status = status;
1129 #ifndef HAVE_SIGACTION
1130 signal(SIGCHLD, remember_children);
1136 * This routine catches signals and tries to send them to gdb.
1138 * Because it's called from inside a signal handler it ought not to
1139 * use too many library routines.
1141 * @todo Perhaps use "screen -X" instead/as well, to help people
1142 * debugging without easy access to X. Perhaps use an environment
1143 * variable, or just call a script?
1145 * @todo The /proc/ magic probably only works on Linux (and
1146 * Solaris?) Can we be more portable?
1148 #ifdef MAINTAINER_MODE
1149 const char *get_panic_action(void)
1151 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1156 return "xterm -display :0 -T Panic -n Panic "
1157 "-e gdb /proc/%d/exe %d";
1162 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1164 * This signal handler is only installed if we were configured with
1165 * --enable-maintainer-mode. Perhaps it should always be on and we
1166 * should just look at the environment variable, but I'm a bit leery
1167 * of a signal sending us into a busy loop.
1169 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1174 sprintf(cmd_buf, get_panic_action(),
1175 getpid(), getpid());
1177 /* Unless we failed to execute gdb, we allow the process to
1178 * continue. I'm not sure if that's right. */
1179 ret = system(cmd_buf);
1186 int main(int argc,char *argv[])
1189 int orig_argc = argc;
1190 char **orig_argv = argv;
1191 #ifdef HAVE_SIGACTION
1192 # ifdef HAVE_SIGPROCMASK
1195 sigemptyset(&sigmask);
1197 sigact.sa_flags = SA_NOCLDSTOP;
1199 SIGACTMASK(SIGUSR1, sigusr1_handler);
1200 SIGACTMASK(SIGUSR2, sigusr2_handler);
1201 SIGACTMASK(SIGCHLD, remember_children);
1202 #ifdef MAINTAINER_MODE
1203 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1204 SIGACTMASK(SIGFPE, rsync_panic_handler);
1205 SIGACTMASK(SIGABRT, rsync_panic_handler);
1206 SIGACTMASK(SIGBUS, rsync_panic_handler);
1209 starttime = time(NULL);
1210 am_root = (MY_UID() == 0);
1212 memset(&stats, 0, sizeof(stats));
1216 exit_cleanup(RERR_SYNTAX);
1219 /* we set a 0 umask so that correct file permissions can be
1221 orig_umask = umask(0);
1223 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1224 setlocale(LC_CTYPE, "");
1227 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1228 /* FIXME: We ought to call the same error-handling
1229 * code here, rather than relying on getopt. */
1231 exit_cleanup(RERR_SYNTAX);
1234 SIGACTMASK(SIGINT, sig_int);
1235 SIGACTMASK(SIGHUP, sig_int);
1236 SIGACTMASK(SIGTERM, sig_int);
1237 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1238 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1241 /* Ignore SIGPIPE; we consistently check error codes and will
1243 SIGACTION(SIGPIPE, SIG_IGN);
1245 SIGACTION(SIGXFSZ, SIG_IGN);
1248 /* Initialize push_dir here because on some old systems getcwd
1249 * (implemented by forking "pwd" and reading its output) doesn't
1250 * work when there are other child processes. Also, on all systems
1251 * that implement getcwd that way "pwd" can't be found after chroot. */
1256 if ((write_batch || read_batch) && !am_server) {
1258 write_batch_shell_file(orig_argc, orig_argv, argc);
1260 if (read_batch && strcmp(batch_name, "-") == 0)
1261 batch_fd = STDIN_FILENO;
1263 batch_fd = do_open(batch_name,
1264 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1265 : O_RDONLY, S_IRUSR | S_IWUSR);
1268 rsyserr(FERROR, errno, "Batch file %s open error",
1269 full_fname(batch_name));
1270 exit_cleanup(RERR_FILEIO);
1273 read_stream_flags(batch_fd);
1275 if (write_batch < 0)
1278 if (am_daemon && !am_server)
1279 return daemon_main();
1283 exit_cleanup(RERR_SYNTAX);
1287 set_nonblocking(STDIN_FILENO);
1288 set_nonblocking(STDOUT_FILENO);
1290 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1291 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1294 ret = start_client(argc, argv);
1296 exit_cleanup(RERR_STARTCLIENT);