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 } else if (errno != ENOENT) {
484 rsyserr(FERROR, errno, "cannot stat destination %s",
485 full_fname(dest_path));
486 exit_cleanup(RERR_FILESELECT);
489 cp = strrchr(dest_path, '/');
491 /* If the destination path ends in a slash or we are transferring
492 * multiple files, create a directory at the destination path,
493 * enter the new directory, and use mode 1. */
494 if (flist->count > 1 || (cp && !cp[1])) {
495 /* Lop off the final slash (if any). */
499 if (mkdir_defmode(dest_path) != 0) {
500 rsyserr(FERROR, errno, "mkdir %s failed",
501 full_fname(dest_path));
502 exit_cleanup(RERR_FILEIO);
506 rprintf(FINFO, "created directory %s\n", dest_path);
509 /* Indicate that the destination directory doesn't
510 * really exist and return mode 1. */
515 if (!push_dir(dest_path)) {
516 rsyserr(FERROR, errno, "push_dir#2 %s failed",
517 full_fname(dest_path));
518 exit_cleanup(RERR_FILESELECT);
524 /* Otherwise, we are writing a single file, possibly on top of an
525 * existing non-directory. Change to the item's parent directory
526 * (if it has a path component), return the basename of the
527 * destination file as the local name, and use mode 2. */
535 if (!push_dir(dest_path)) {
536 rsyserr(FERROR, errno, "push_dir#3 %s failed",
537 full_fname(dest_path));
538 exit_cleanup(RERR_FILESELECT);
546 /* This is only called by the sender. */
547 static void read_final_goodbye(int f_in, int f_out)
551 if (protocol_version < 29)
554 while ((i = read_int(f_in)) == the_file_list->count
555 && read_shortint(f_in) == ITEM_IS_NEW) {
556 /* Forward the keep-alive (no-op) to the receiver. */
557 write_int(f_out, the_file_list->count);
558 write_shortint(f_out, ITEM_IS_NEW);
563 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
565 exit_cleanup(RERR_PROTOCOL);
570 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
572 struct file_list *flist;
576 rprintf(FINFO, "server_sender starting pid=%ld\n",
580 if (am_daemon && lp_write_only(module_id)) {
581 rprintf(FERROR, "ERROR: module is write only\n");
582 exit_cleanup(RERR_SYNTAX);
585 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
587 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
588 exit_cleanup(RERR_SYNTAX);
592 if (!relative_paths && !push_dir(dir)) {
593 rsyserr(FERROR, errno, "push_dir#3 %s failed",
595 exit_cleanup(RERR_FILESELECT);
600 if (argc == 0 && (recurse || list_only)) {
606 flist = send_file_list(f_out,argc,argv);
607 if (!flist || flist->count == 0) {
610 the_file_list = flist;
612 io_start_buffering_in();
613 io_start_buffering_out();
615 send_files(flist,f_out,f_in);
616 io_flush(FULL_FLUSH);
618 if (protocol_version >= 24)
619 read_final_goodbye(f_in, f_out);
620 io_flush(FULL_FLUSH);
625 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
631 /* The receiving side mustn't obey this, or an existing symlink that
632 * points to an identical file won't be replaced by the referent. */
633 copy_links = copy_dirlinks = 0;
635 if (preserve_hard_links)
638 if (fd_pair(error_pipe) < 0) {
639 rsyserr(FERROR, errno, "pipe failed in do_recv");
640 exit_cleanup(RERR_IPC);
643 io_flush(NORMAL_FLUSH);
645 if ((pid = do_fork()) == -1) {
646 rsyserr(FERROR, errno, "fork failed in do_recv");
647 exit_cleanup(RERR_IPC);
651 close(error_pipe[0]);
655 /* we can't let two processes write to the socket at one time */
656 close_multiplexing_out();
658 /* set place to send errors */
659 set_msg_fd_out(error_pipe[1]);
661 recv_files(f_in, flist, local_name);
662 io_flush(FULL_FLUSH);
665 send_msg(MSG_DONE, "", 0);
666 io_flush(FULL_FLUSH);
668 /* Handle any keep-alive packets from the post-processing work
669 * that the generator does. */
670 if (protocol_version >= 29) {
671 kluge_around_eof = -1;
673 /* This should only get stopped via a USR2 signal. */
674 while (read_int(f_in) == flist->count
675 && read_shortint(f_in) == ITEM_IS_NEW) {}
677 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
679 exit_cleanup(RERR_PROTOCOL);
682 /* Finally, we go to sleep until our parent kills us with a
683 * USR2 signal. We sleep for a short time, as on some OSes
684 * a signal won't interrupt a sleep! */
690 close_multiplexing_in();
691 if (write_batch && !am_server)
694 close(error_pipe[1]);
698 io_start_buffering_out();
700 set_msg_fd_in(error_pipe[0]);
702 generate_files(f_out, flist, local_name);
705 io_flush(FULL_FLUSH);
706 if (protocol_version >= 24) {
707 /* send a final goodbye message */
708 write_int(f_out, -1);
710 io_flush(FULL_FLUSH);
714 wait_process_with_flush(pid, &exit_code);
719 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
722 struct file_list *flist;
723 char *local_name = NULL;
725 int save_verbose = verbose;
727 if (filesfrom_fd >= 0) {
728 /* We can't mix messages with files-from data on the socket,
729 * so temporarily turn off verbose messages. */
734 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
735 argc, (long)getpid());
738 if (am_daemon && lp_read_only(module_id)) {
739 rprintf(FERROR,"ERROR: module is read only\n");
740 exit_cleanup(RERR_SYNTAX);
748 if (!am_daemon && !push_dir(dir)) {
749 rsyserr(FERROR, errno, "push_dir#4 %s failed",
751 exit_cleanup(RERR_FILESELECT);
755 io_start_buffering_in();
756 recv_filter_list(f_in);
758 if (filesfrom_fd >= 0) {
759 /* We need to send the files-from names to the sender at the
760 * same time that we receive the file-list from them, so we
761 * need the IO routines to automatically write out the names
762 * onto our f_out socket as we read the file-list. This
763 * avoids both deadlock and extra delays/buffers. */
764 io_set_filesfrom_fds(filesfrom_fd, f_out);
768 flist = recv_file_list(f_in);
769 verbose = save_verbose;
771 rprintf(FERROR,"server_recv: recv_file_list error\n");
772 exit_cleanup(RERR_FILESELECT);
774 the_file_list = flist;
777 local_name = get_local_name(flist,argv[0]);
779 exit_code = do_recv(f_in,f_out,flist,local_name);
780 exit_cleanup(exit_code);
784 int child_main(int argc, char *argv[])
786 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
791 void start_server(int f_in, int f_out, int argc, char *argv[])
793 set_nonblocking(f_in);
794 set_nonblocking(f_out);
796 io_set_sock_fds(f_in, f_out);
797 setup_protocol(f_out, f_in);
798 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
802 if (protocol_version >= 23)
803 io_start_multiplex_out();
806 keep_dirlinks = 0; /* Must be disabled on the sender. */
807 if (need_messages_from_generator)
808 io_start_multiplex_in();
810 recv_filter_list(f_in);
811 do_server_sender(f_in, f_out, argc, argv);
813 do_server_recv(f_in, f_out, argc, argv);
820 * This is called once the connection has been negotiated. It is used
821 * for rsyncd, remote-shell, and local connections.
823 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
825 struct file_list *flist = NULL;
826 int exit_code = 0, exit_code2 = 0;
827 char *local_name = NULL;
829 cleanup_child_pid = pid;
831 set_nonblocking(f_in);
832 set_nonblocking(f_out);
835 io_set_sock_fds(f_in, f_out);
836 setup_protocol(f_out,f_in);
837 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
841 if (protocol_version >= 23 && !read_batch)
842 io_start_multiplex_in();
844 /* We set our stderr file handle to blocking because ssh might have
845 * set it to non-blocking. This can be particularly troublesome if
846 * stderr is a clone of stdout, because ssh would have set our stdout
847 * to non-blocking at the same time (which can easily cause us to lose
848 * output from our print statements). This kluge shouldn't cause ssh
849 * any problems for how we use it. Note also that we delayed setting
850 * this until after the above protocol setup so that we know for sure
851 * that ssh is done twiddling its file descriptors. */
852 set_blocking(STDERR_FILENO);
855 keep_dirlinks = 0; /* Must be disabled on the sender. */
856 io_start_buffering_out();
859 send_filter_list(f_out);
863 if (write_batch && !am_server)
864 start_write_batch(f_out);
865 flist = send_file_list(f_out, argc, argv);
868 rprintf(FINFO,"file list sent\n");
869 the_file_list = flist;
871 io_flush(NORMAL_FLUSH);
872 send_files(flist,f_out,f_in);
873 io_flush(FULL_FLUSH);
875 if (protocol_version >= 24)
876 read_final_goodbye(f_in, f_out);
879 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
880 io_flush(FULL_FLUSH);
881 wait_process_with_flush(pid, &exit_code);
884 io_flush(FULL_FLUSH);
885 exit_cleanup(exit_code);
888 if (need_messages_from_generator && !read_batch)
889 io_start_multiplex_out();
894 send_filter_list(read_batch ? -1 : f_out);
896 if (filesfrom_fd >= 0) {
897 io_set_filesfrom_fds(filesfrom_fd, f_out);
901 if (write_batch && !am_server)
902 start_write_batch(f_in);
903 flist = recv_file_list(f_in);
904 the_file_list = flist;
906 if (flist && flist->count > 0) {
907 local_name = get_local_name(flist, argv[0]);
909 exit_code2 = do_recv(f_in, f_out, flist, local_name);
917 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
918 io_flush(FULL_FLUSH);
919 wait_process_with_flush(pid, &exit_code);
922 return MAX(exit_code, exit_code2);
925 static int copy_argv (char *argv[])
929 for (i = 0; argv[i]; i++) {
930 if (!(argv[i] = strdup(argv[i]))) {
931 rprintf (FERROR, "out of memory at %s(%d)\n",
942 * Start a client for either type of remote connection. Work out
943 * whether the arguments request a remote shell or rsyncd connection,
944 * and call the appropriate connection function, then run_client.
946 * Calls either start_socket_client (for sockets) or do_cmd and
947 * client_run (for ssh).
949 static int start_client(int argc, char *argv[])
952 char *shell_machine = NULL;
953 char *shell_path = NULL;
954 char *shell_user = NULL;
960 /* Don't clobber argv[] so that ps(1) can still show the right
962 if ((rc = copy_argv(argv)))
965 if (!read_batch) { /* for read_batch, NO source is specified */
966 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
967 if (shell_path) { /* source is remote */
971 && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
973 "The source and destination cannot both be remote.\n");
974 exit_cleanup(RERR_SYNTAX);
977 if (filesfrom_host && *filesfrom_host
978 && strcmp(filesfrom_host, shell_machine) != 0) {
980 "--files-from hostname is not the same as the transfer hostname\n");
981 exit_cleanup(RERR_SYNTAX);
985 return start_socket_client(shell_machine,
993 } else { /* source is local, check dest arg */
1003 shell_path = check_for_hostspec(p, &shell_machine, &rsync_port);
1004 if (shell_path && filesfrom_host && *filesfrom_host
1005 && strcmp(filesfrom_host, shell_machine) != 0) {
1007 "--files-from hostname is not the same as the transfer hostname\n");
1008 exit_cleanup(RERR_SYNTAX);
1010 if (!shell_path) { /* no hostspec found, so src & dest are local */
1012 if (filesfrom_host) {
1014 "--files-from cannot be remote when the transfer is local\n");
1015 exit_cleanup(RERR_SYNTAX);
1017 shell_machine = NULL;
1019 } else if (rsync_port) {
1021 return start_socket_client(shell_machine,
1025 daemon_over_rsh = 1;
1028 } else { /* read_batch */
1030 shell_path = argv[argc-1];
1031 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1032 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1033 exit_cleanup(RERR_SYNTAX);
1037 if (shell_machine) {
1038 p = strrchr(shell_machine,'@');
1041 shell_user = shell_machine;
1042 shell_machine = p+1;
1047 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1048 shell_cmd ? shell_cmd : "",
1049 shell_machine ? shell_machine : "",
1050 shell_user ? shell_user : "",
1051 shell_path ? shell_path : "");
1054 /* for remote source, only single dest arg can remain ... */
1055 if (!am_sender && argc > 1) {
1057 exit_cleanup(RERR_SYNTAX);
1060 /* ... or no dest at all */
1061 if (!am_sender && argc == 0)
1064 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1067 /* if we're running an rsync server on the remote host over a
1068 * remote shell command, we need to do the RSYNCD protocol first */
1069 if (daemon_over_rsh) {
1071 tmpret = start_inband_exchange(shell_user, shell_path,
1077 ret = client_run(f_in, f_out, pid, argc, argv);
1086 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1088 exit_cleanup(RERR_SIGNAL1);
1091 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1097 _exit(RERR_PARTIAL);
1101 RETSIGTYPE remember_children(UNUSED(int val))
1106 /* An empty waitpid() loop was put here by Tridge and we could never
1107 * get him to explain why he put it in, so rather than taking it
1108 * out we're instead saving the child exit statuses for later use.
1109 * The waitpid() loop presumably eliminates all possibility of leaving
1110 * zombie children, maybe that's why he did it. */
1111 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1112 /* save the child's exit status */
1113 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1114 if (pid_stat_table[cnt].pid == 0) {
1115 pid_stat_table[cnt].pid = pid;
1116 pid_stat_table[cnt].status = status;
1122 #ifndef HAVE_SIGACTION
1123 signal(SIGCHLD, remember_children);
1129 * This routine catches signals and tries to send them to gdb.
1131 * Because it's called from inside a signal handler it ought not to
1132 * use too many library routines.
1134 * @todo Perhaps use "screen -X" instead/as well, to help people
1135 * debugging without easy access to X. Perhaps use an environment
1136 * variable, or just call a script?
1138 * @todo The /proc/ magic probably only works on Linux (and
1139 * Solaris?) Can we be more portable?
1141 #ifdef MAINTAINER_MODE
1142 const char *get_panic_action(void)
1144 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1149 return "xterm -display :0 -T Panic -n Panic "
1150 "-e gdb /proc/%d/exe %d";
1155 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1157 * This signal handler is only installed if we were configured with
1158 * --enable-maintainer-mode. Perhaps it should always be on and we
1159 * should just look at the environment variable, but I'm a bit leery
1160 * of a signal sending us into a busy loop.
1162 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1167 sprintf(cmd_buf, get_panic_action(),
1168 getpid(), getpid());
1170 /* Unless we failed to execute gdb, we allow the process to
1171 * continue. I'm not sure if that's right. */
1172 ret = system(cmd_buf);
1179 int main(int argc,char *argv[])
1182 int orig_argc = argc;
1183 char **orig_argv = argv;
1184 #ifdef HAVE_SIGACTION
1185 # ifdef HAVE_SIGPROCMASK
1188 sigemptyset(&sigmask);
1190 sigact.sa_flags = SA_NOCLDSTOP;
1192 SIGACTMASK(SIGUSR1, sigusr1_handler);
1193 SIGACTMASK(SIGUSR2, sigusr2_handler);
1194 SIGACTMASK(SIGCHLD, remember_children);
1195 #ifdef MAINTAINER_MODE
1196 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1197 SIGACTMASK(SIGFPE, rsync_panic_handler);
1198 SIGACTMASK(SIGABRT, rsync_panic_handler);
1199 SIGACTMASK(SIGBUS, rsync_panic_handler);
1202 starttime = time(NULL);
1203 am_root = (MY_UID() == 0);
1205 memset(&stats, 0, sizeof(stats));
1209 exit_cleanup(RERR_SYNTAX);
1212 /* we set a 0 umask so that correct file permissions can be
1214 orig_umask = umask(0);
1216 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1217 setlocale(LC_CTYPE, "");
1220 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1221 /* FIXME: We ought to call the same error-handling
1222 * code here, rather than relying on getopt. */
1224 exit_cleanup(RERR_SYNTAX);
1227 SIGACTMASK(SIGINT, sig_int);
1228 SIGACTMASK(SIGHUP, sig_int);
1229 SIGACTMASK(SIGTERM, sig_int);
1230 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1231 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1234 /* Ignore SIGPIPE; we consistently check error codes and will
1236 SIGACTION(SIGPIPE, SIG_IGN);
1238 SIGACTION(SIGXFSZ, SIG_IGN);
1241 /* Initialize push_dir here because on some old systems getcwd
1242 * (implemented by forking "pwd" and reading its output) doesn't
1243 * work when there are other child processes. Also, on all systems
1244 * that implement getcwd that way "pwd" can't be found after chroot. */
1249 if ((write_batch || read_batch) && !am_server) {
1251 write_batch_shell_file(orig_argc, orig_argv, argc);
1253 if (read_batch && strcmp(batch_name, "-") == 0)
1254 batch_fd = STDIN_FILENO;
1256 batch_fd = do_open(batch_name,
1257 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1258 : O_RDONLY, S_IRUSR | S_IWUSR);
1261 rsyserr(FERROR, errno, "Batch file %s open error",
1262 full_fname(batch_name));
1263 exit_cleanup(RERR_FILEIO);
1266 read_stream_flags(batch_fd);
1268 if (write_batch < 0)
1271 if (am_daemon && !am_server)
1272 return daemon_main();
1276 exit_cleanup(RERR_SYNTAX);
1280 set_nonblocking(STDIN_FILENO);
1281 set_nonblocking(STDOUT_FILENO);
1283 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1284 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1287 ret = start_client(argc, argv);
1289 exit_cleanup(RERR_STARTCLIENT);