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
71 #if defined HAVE_SIGACTION && defined HAVE_SIGPROCMASK
72 #define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
73 static struct sigaction sigact;
79 } pid_stat_table[MAXCHILDPROCS];
81 static time_t starttime, endtime;
82 static int64 total_read, total_written;
84 static void show_malloc_stats(void);
86 /* Works like waitpid(), but if we already harvested the child pid in our
87 * sigchld_handler(), we succeed instead of returning an error. */
88 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
90 pid_t waited_pid = waitpid(pid, status_ptr, flags);
92 if (waited_pid == -1 && errno == ECHILD) {
93 /* Status of requested child no longer available: check to
94 * see if it was processed by sigchld_handler(). */
96 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
97 if (pid == pid_stat_table[cnt].pid) {
98 *status_ptr = pid_stat_table[cnt].status;
99 pid_stat_table[cnt].pid = 0;
108 /* Wait for a process to exit, calling io_flush while waiting. */
109 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
114 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
116 io_flush(FULL_FLUSH);
119 /* TODO: If the child exited on a signal, then log an
120 * appropriate error message. Perhaps we should also accept a
121 * message describing the purpose of the child. Also indicate
122 * this to the caller so that they know something went wrong. */
123 if (waited_pid < 0) {
124 rsyserr(FERROR, errno, "waitpid");
125 *exit_code_ptr = RERR_WAITCHILD;
126 } else if (!WIFEXITED(status)) {
128 if (WCOREDUMP(status))
129 *exit_code_ptr = RERR_CRASHED;
132 if (WIFSIGNALED(status))
133 *exit_code_ptr = RERR_TERMINATED;
135 *exit_code_ptr = RERR_WAITCHILD;
137 *exit_code_ptr = WEXITSTATUS(status);
140 /* This function gets called from all 3 processes. We want the client side
141 * to actually output the text, but the sender is the only process that has
142 * all the stats we need. So, if we're a client sender, we do the report.
143 * If we're a server sender, we write the stats on the supplied fd. If
144 * we're the client receiver we read the stats from the supplied fd and do
145 * the report. All processes might also generate a set of debug stats, if
146 * the verbose level is high enough (this is the only thing that the
147 * generator process and the server receiver ever do here). */
148 static void handle_stats(int f)
150 endtime = time(NULL);
152 /* Cache two stats because the read/write code can change it. */
153 total_read = stats.total_read;
154 total_written = stats.total_written;
156 if (do_stats && verbose > 1) {
157 /* These come out from every process */
166 log_exit(0, __FILE__, __LINE__);
167 if (f == -1 || !am_sender)
173 write_longint(f, total_read);
174 write_longint(f, total_written);
175 write_longint(f, stats.total_size);
176 if (protocol_version >= 29) {
177 write_longint(f, stats.flist_buildtime);
178 write_longint(f, stats.flist_xfertime);
184 /* this is the client */
186 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
188 else if (!am_sender) {
189 /* Read the first two in opposite order because the meaning of
190 * read/write swaps when switching from sender to receiver. */
191 total_written = read_longint(f);
192 total_read = read_longint(f);
193 stats.total_size = read_longint(f);
194 if (protocol_version >= 29) {
195 stats.flist_buildtime = read_longint(f);
196 stats.flist_xfertime = read_longint(f);
198 } else if (write_batch) {
199 /* The --read-batch process is going to be a client
200 * receiver, so we need to give it the stats. */
201 write_longint(batch_fd, total_read);
202 write_longint(batch_fd, total_written);
203 write_longint(batch_fd, stats.total_size);
204 if (protocol_version >= 29) {
205 write_longint(batch_fd, stats.flist_buildtime);
206 write_longint(batch_fd, stats.flist_xfertime);
211 static void output_summary(void)
214 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
215 rprintf(FINFO,"Number of files transferred: %d\n",
216 stats.num_transferred_files);
217 rprintf(FINFO,"Total file size: %s bytes\n",
218 human_num(stats.total_size));
219 rprintf(FINFO,"Total transferred file size: %s bytes\n",
220 human_num(stats.total_transferred_size));
221 rprintf(FINFO,"Literal data: %s bytes\n",
222 human_num(stats.literal_data));
223 rprintf(FINFO,"Matched data: %s bytes\n",
224 human_num(stats.matched_data));
225 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
226 if (stats.flist_buildtime) {
228 "File list generation time: %.3f seconds\n",
229 (double)stats.flist_buildtime / 1000);
231 "File list transfer time: %.3f seconds\n",
232 (double)stats.flist_xfertime / 1000);
234 rprintf(FINFO,"Total bytes sent: %s\n",
235 human_num(total_written));
236 rprintf(FINFO,"Total bytes received: %s\n",
237 human_num(total_read));
240 if (verbose || do_stats) {
242 "\nsent %s bytes received %s bytes %s bytes/sec\n",
243 human_num(total_written), human_num(total_read),
244 human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
245 rprintf(FINFO, "total size is %s speedup is %.2f\n",
246 human_num(stats.total_size),
247 (double)stats.total_size / (total_written+total_read));
256 * If our C library can get malloc statistics, then show them to FINFO
258 static void show_malloc_stats(void)
265 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
266 getpid(), am_server ? "server " : "",
267 am_daemon ? "daemon " : "", who_am_i());
268 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
270 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
272 rprintf(FINFO, " smblks: %10ld\n",
274 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
276 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
278 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
279 (long)mi.arena + mi.hblkhd);
280 rprintf(FINFO, " usmblks: %10ld\n",
282 rprintf(FINFO, " fsmblks: %10ld\n",
284 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
286 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
288 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
290 #endif /* HAVE_MALLINFO */
294 /* Start the remote shell. cmd may be NULL to use the default. */
295 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
296 int *f_in, int *f_out)
299 char *args[MAX_ARGS];
304 if (!read_batch && !local_server) {
305 char *t, *f, in_quote = '\0';
306 char *rsh_env = getenv(RSYNC_RSH_ENV);
315 for (t = f = cmd; *f; f++) {
318 /* Comparison leaves rooms for server_options(). */
319 if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
320 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
321 exit_cleanup(RERR_SYNTAX);
324 while (*f != ' ' || in_quote) {
328 "Missing trailing-%c in remote-shell command.\n",
330 exit_cleanup(RERR_SYNTAX);
335 if (*f == '\'' || *f == '"') {
340 if (*f == in_quote && *++f != in_quote) {
350 /* check to see if we've already been given '-l user' in
351 * the remote-shell command */
352 for (i = 0; i < argc-1; i++) {
353 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
358 /* remsh (on HPUX) takes the arguments the other way around */
359 args[argc++] = machine;
360 if (user && !(daemon_over_rsh && dash_l_set)) {
365 if (user && !(daemon_over_rsh && dash_l_set)) {
369 args[argc++] = machine;
372 args[argc++] = rsync_path;
374 if (blocking_io < 0) {
376 if ((cp = strrchr(cmd, '/')) != NULL)
380 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
384 server_options(args,&argc);
386 if (argc >= MAX_ARGS - 2) {
387 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
388 exit_cleanup(RERR_SYNTAX);
394 if (!daemon_over_rsh && path && *path)
400 for (i = 0; i < argc; i++)
401 rprintf(FINFO, "cmd[%d]=%s ", i, args[i]);
402 rprintf(FINFO, "\n");
406 int from_gen_pipe[2];
407 if (fd_pair(from_gen_pipe) < 0) {
408 rsyserr(FERROR, errno, "pipe");
409 exit_cleanup(RERR_IPC);
411 batch_gen_fd = from_gen_pipe[0];
412 *f_out = from_gen_pipe[1];
414 ret = -1; /* no child pid */
415 } else if (local_server) {
416 /* If the user didn't request --[no-]whole-file, force
417 * it on, but only if we're not batch processing. */
418 if (whole_file < 0 && !write_batch)
420 ret = local_child(argc, args, f_in, f_out, child_main);
422 ret = piped_child(args,f_in,f_out);
430 out_of_memory("do_cmd");
431 return 0; /* not reached */
434 /* The receiving side operates in one of two modes:
436 * 1. it enters a directory and receives one or more files, placing them
437 * according to their names in the file-list.
439 * 2. it receives a single file and saves it using the name in the
440 * destination path instead of its file-list name. This requires a
441 * "local name" for writing out the destination file.
443 * So, our task is to figure out what mode/local-name we need and return
444 * either a NULL for mode 1, or the local-name for mode 2. We also
445 * change directory if there are any path components in dest_path. */
446 static char *get_local_name(struct file_list *flist, char *dest_path)
452 rprintf(FINFO, "get_local_name count=%d %s\n",
453 flist->count, NS(dest_path));
459 /* If the destination path refers to an existing directory, enter
460 * it and use mode 1. If there is something other than a directory
461 * at the destination path, we must be transferring one file
462 * (anything at the destination will be overwritten). */
463 if (do_stat(dest_path, &st) == 0) {
464 if (S_ISDIR(st.st_mode)) {
465 if (!push_dir(dest_path)) {
466 rsyserr(FERROR, errno, "push_dir#1 %s failed",
467 full_fname(dest_path));
468 exit_cleanup(RERR_FILESELECT);
472 if (flist->count > 1) {
474 "ERROR: destination must be a directory when"
475 " copying more than 1 file\n");
476 exit_cleanup(RERR_FILESELECT);
480 cp = strrchr(dest_path, '/');
482 /* If the destination path ends in a slash or we are transferring
483 * multiple files, create a directory at the destination path,
484 * enter the new directory, and use mode 1. */
485 if (flist->count > 1 || (cp && !cp[1])) {
486 /* Lop off the final slash (if any). */
491 if (do_mkdir(dest_path, 0777) != 0) {
492 rsyserr(FERROR, errno, "mkdir %s failed",
493 full_fname(dest_path));
494 exit_cleanup(RERR_FILEIO);
499 rprintf(FINFO, "created directory %s\n", dest_path);
502 /* Indicate that the destination directory doesn't
503 * really exist and return mode 1. */
508 if (!push_dir(dest_path)) {
509 rsyserr(FERROR, errno, "push_dir#2 %s failed",
510 full_fname(dest_path));
511 exit_cleanup(RERR_FILESELECT);
517 /* Otherwise, we are writing a single file, possibly on top of an
518 * existing non-directory. Change to the item's parent directory
519 * (if it has a path component), return the basename of the
520 * destination file as the local name, and use mode 2. */
528 if (!push_dir(dest_path)) {
529 rsyserr(FERROR, errno, "push_dir#3 %s failed",
530 full_fname(dest_path));
531 exit_cleanup(RERR_FILESELECT);
539 /* This is only called by the sender. */
540 static void read_final_goodbye(int f_in, int f_out)
544 if (protocol_version < 29)
547 while ((i = read_int(f_in)) == the_file_list->count
548 && read_shortint(f_in) == ITEM_IS_NEW) {
549 /* Forward the keep-alive (no-op) to the receiver. */
550 write_int(f_out, the_file_list->count);
551 write_shortint(f_out, ITEM_IS_NEW);
556 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
558 exit_cleanup(RERR_PROTOCOL);
563 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
565 struct file_list *flist;
569 rprintf(FINFO, "server_sender starting pid=%ld\n",
573 if (am_daemon && lp_write_only(module_id)) {
574 rprintf(FERROR, "ERROR: module is write only\n");
575 exit_cleanup(RERR_SYNTAX);
578 if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
580 "ERROR: --remove-sent-files cannot be used with a read-only module\n");
581 exit_cleanup(RERR_SYNTAX);
585 if (!relative_paths && !push_dir(dir)) {
586 rsyserr(FERROR, errno, "push_dir#3 %s failed",
588 exit_cleanup(RERR_FILESELECT);
593 if (argc == 0 && (recurse || list_only)) {
599 flist = send_file_list(f_out,argc,argv);
600 if (!flist || flist->count == 0) {
603 the_file_list = flist;
605 io_start_buffering_in();
606 io_start_buffering_out();
608 send_files(flist,f_out,f_in);
609 io_flush(FULL_FLUSH);
611 if (protocol_version >= 24)
612 read_final_goodbye(f_in, f_out);
613 io_flush(FULL_FLUSH);
618 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
624 /* The receiving side mustn't obey this, or an existing symlink that
625 * points to an identical file won't be replaced by the referent. */
628 if (preserve_hard_links)
631 if (fd_pair(error_pipe) < 0) {
632 rsyserr(FERROR, errno, "pipe failed in do_recv");
633 exit_cleanup(RERR_IPC);
636 io_flush(NORMAL_FLUSH);
638 if ((pid = do_fork()) == -1) {
639 rsyserr(FERROR, errno, "fork failed in do_recv");
640 exit_cleanup(RERR_IPC);
644 close(error_pipe[0]);
648 /* we can't let two processes write to the socket at one time */
649 close_multiplexing_out();
651 /* set place to send errors */
652 set_msg_fd_out(error_pipe[1]);
654 recv_files(f_in, flist, local_name);
655 io_flush(FULL_FLUSH);
658 send_msg(MSG_DONE, "", 0);
659 io_flush(FULL_FLUSH);
661 /* Handle any keep-alive packets from the post-processing work
662 * that the generator does. */
663 if (protocol_version >= 29) {
664 kluge_around_eof = -1;
666 /* This should only get stopped via a USR2 signal. */
667 while (read_int(f_in) == flist->count
668 && read_shortint(f_in) == ITEM_IS_NEW) {}
670 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
672 exit_cleanup(RERR_PROTOCOL);
675 /* Finally, we go to sleep until our parent kills us with a
676 * USR2 signal. We sleep for a short time, as on some OSes
677 * a signal won't interrupt a sleep! */
683 close_multiplexing_in();
684 if (write_batch && !am_server)
687 close(error_pipe[1]);
691 io_start_buffering_out();
693 set_msg_fd_in(error_pipe[0]);
695 generate_files(f_out, flist, local_name);
698 io_flush(FULL_FLUSH);
699 if (protocol_version >= 24) {
700 /* send a final goodbye message */
701 write_int(f_out, -1);
703 io_flush(FULL_FLUSH);
707 wait_process_with_flush(pid, &exit_code);
712 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
715 struct file_list *flist;
716 char *local_name = NULL;
718 int save_verbose = verbose;
720 if (filesfrom_fd >= 0) {
721 /* We can't mix messages with files-from data on the socket,
722 * so temporarily turn off verbose messages. */
727 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
728 argc, (long)getpid());
731 if (am_daemon && lp_read_only(module_id)) {
732 rprintf(FERROR,"ERROR: module is read only\n");
733 exit_cleanup(RERR_SYNTAX);
741 if (!am_daemon && !push_dir(dir)) {
742 rsyserr(FERROR, errno, "push_dir#4 %s failed",
744 exit_cleanup(RERR_FILESELECT);
748 io_start_buffering_in();
749 recv_filter_list(f_in);
751 if (filesfrom_fd >= 0) {
752 /* We need to send the files-from names to the sender at the
753 * same time that we receive the file-list from them, so we
754 * need the IO routines to automatically write out the names
755 * onto our f_out socket as we read the file-list. This
756 * avoids both deadlock and extra delays/buffers. */
757 io_set_filesfrom_fds(filesfrom_fd, f_out);
761 flist = recv_file_list(f_in);
762 verbose = save_verbose;
764 rprintf(FERROR,"server_recv: recv_file_list error\n");
765 exit_cleanup(RERR_FILESELECT);
767 the_file_list = flist;
770 local_name = get_local_name(flist,argv[0]);
772 exit_code = do_recv(f_in,f_out,flist,local_name);
773 exit_cleanup(exit_code);
777 int child_main(int argc, char *argv[])
779 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
784 void start_server(int f_in, int f_out, int argc, char *argv[])
786 set_nonblocking(f_in);
787 set_nonblocking(f_out);
789 io_set_sock_fds(f_in, f_out);
790 setup_protocol(f_out, f_in);
792 if (protocol_version >= 23)
793 io_start_multiplex_out();
796 keep_dirlinks = 0; /* Must be disabled on the sender. */
797 if (need_messages_from_generator)
798 io_start_multiplex_in();
800 recv_filter_list(f_in);
801 do_server_sender(f_in, f_out, argc, argv);
803 do_server_recv(f_in, f_out, argc, argv);
810 * This is called once the connection has been negotiated. It is used
811 * for rsyncd, remote-shell, and local connections.
813 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
815 struct file_list *flist = NULL;
816 int exit_code = 0, exit_code2 = 0;
817 char *local_name = NULL;
819 cleanup_child_pid = pid;
821 set_nonblocking(f_in);
822 set_nonblocking(f_out);
825 io_set_sock_fds(f_in, f_out);
826 setup_protocol(f_out,f_in);
828 if (protocol_version >= 23 && !read_batch)
829 io_start_multiplex_in();
831 /* We set our stderr file handle to blocking because ssh might have
832 * set it to non-blocking. This can be particularly troublesome if
833 * stderr is a clone of stdout, because ssh would have set our stdout
834 * to non-blocking at the same time (which can easily cause us to lose
835 * output from our print statements). This kluge shouldn't cause ssh
836 * any problems for how we use it. Note also that we delayed setting
837 * this until after the above protocol setup so that we know for sure
838 * that ssh is done twiddling its file descriptors. */
839 set_blocking(STDERR_FILENO);
842 keep_dirlinks = 0; /* Must be disabled on the sender. */
843 io_start_buffering_out();
846 send_filter_list(f_out);
850 if (write_batch && !am_server)
851 start_write_batch(f_out);
852 flist = send_file_list(f_out, argc, argv);
855 rprintf(FINFO,"file list sent\n");
856 the_file_list = flist;
858 io_flush(NORMAL_FLUSH);
859 send_files(flist,f_out,f_in);
860 io_flush(FULL_FLUSH);
862 if (protocol_version >= 24)
863 read_final_goodbye(f_in, f_out);
866 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
867 io_flush(FULL_FLUSH);
868 wait_process_with_flush(pid, &exit_code);
871 io_flush(FULL_FLUSH);
872 exit_cleanup(exit_code);
875 if (need_messages_from_generator && !read_batch)
876 io_start_multiplex_out();
881 send_filter_list(read_batch ? -1 : f_out);
883 if (filesfrom_fd >= 0) {
884 io_set_filesfrom_fds(filesfrom_fd, f_out);
888 if (write_batch && !am_server)
889 start_write_batch(f_in);
890 flist = recv_file_list(f_in);
891 the_file_list = flist;
893 if (flist && flist->count > 0) {
894 local_name = get_local_name(flist, argv[0]);
896 exit_code2 = do_recv(f_in, f_out, flist, local_name);
904 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
905 io_flush(FULL_FLUSH);
906 wait_process_with_flush(pid, &exit_code);
909 return MAX(exit_code, exit_code2);
912 static int copy_argv (char *argv[])
916 for (i = 0; argv[i]; i++) {
917 if (!(argv[i] = strdup(argv[i]))) {
918 rprintf (FERROR, "out of memory at %s(%d)\n",
929 * Start a client for either type of remote connection. Work out
930 * whether the arguments request a remote shell or rsyncd connection,
931 * and call the appropriate connection function, then run_client.
933 * Calls either start_socket_client (for sockets) or do_cmd and
934 * client_run (for ssh).
936 static int start_client(int argc, char *argv[])
939 char *shell_machine = NULL;
940 char *shell_path = NULL;
941 char *shell_user = NULL;
947 /* Don't clobber argv[] so that ps(1) can still show the right
949 if ((rc = copy_argv(argv)))
952 if (!read_batch) { /* for read_batch, NO source is specified */
954 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
955 if (shell_path) { /* source is remote */
958 if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
960 "The source and destination cannot both be remote.\n");
961 exit_cleanup(RERR_SYNTAX);
964 if (filesfrom_host && *filesfrom_host
965 && strcmp(filesfrom_host, shell_machine) != 0) {
967 "--files-from hostname is not the same as the transfer hostname\n");
968 exit_cleanup(RERR_SYNTAX);
972 return start_socket_client(shell_machine,
980 } else { /* source is local, check dest arg */
983 if (argc < 1) { /* destination required */
985 exit_cleanup(RERR_SYNTAX);
988 shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port);
989 if (shell_path && filesfrom_host && *filesfrom_host
990 && strcmp(filesfrom_host, shell_machine) != 0) {
992 "--files-from hostname is not the same as the transfer hostname\n");
993 exit_cleanup(RERR_SYNTAX);
995 if (!shell_path) { /* no hostspec found, so src & dest are local */
997 if (filesfrom_host) {
999 "--files-from cannot be remote when the transfer is local\n");
1000 exit_cleanup(RERR_SYNTAX);
1002 shell_machine = NULL;
1003 shell_path = argv[argc];
1004 } else if (rsync_port) {
1006 return start_socket_client(shell_machine,
1010 daemon_over_rsh = 1;
1013 } else { /* read_batch */
1015 shell_path = argv[argc-1];
1016 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1017 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1018 exit_cleanup(RERR_SYNTAX);
1022 if (shell_machine) {
1023 p = strrchr(shell_machine,'@');
1026 shell_user = shell_machine;
1027 shell_machine = p+1;
1032 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1033 shell_cmd ? shell_cmd : "",
1034 shell_machine ? shell_machine : "",
1035 shell_user ? shell_user : "",
1036 shell_path ? shell_path : "");
1039 /* for remote source, only single dest arg can remain ... */
1040 if (!am_sender && argc > 1) {
1042 exit_cleanup(RERR_SYNTAX);
1045 /* ... or no dest at all */
1046 if (!am_sender && argc == 0)
1049 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1052 /* if we're running an rsync server on the remote host over a
1053 * remote shell command, we need to do the RSYNCD protocol first */
1054 if (daemon_over_rsh) {
1056 tmpret = start_inband_exchange(shell_user, shell_path,
1062 ret = client_run(f_in, f_out, pid, argc, argv);
1071 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1073 exit_cleanup(RERR_SIGNAL1);
1076 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1082 _exit(RERR_PARTIAL);
1086 static RETSIGTYPE sigchld_handler(UNUSED(int val))
1091 /* An empty waitpid() loop was put here by Tridge and we could never
1092 * get him to explain why he put it in, so rather than taking it
1093 * out we're instead saving the child exit statuses for later use.
1094 * The waitpid() loop presumably eliminates all possibility of leaving
1095 * zombie children, maybe that's why he did it. */
1096 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1097 /* save the child's exit status */
1098 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1099 if (pid_stat_table[cnt].pid == 0) {
1100 pid_stat_table[cnt].pid = pid;
1101 pid_stat_table[cnt].status = status;
1107 #if !defined HAVE_SIGACTION && !defined HAVE_SIGPROCMASK
1108 signal(SIGCHLD, sigchld_handler);
1114 * This routine catches signals and tries to send them to gdb.
1116 * Because it's called from inside a signal handler it ought not to
1117 * use too many library routines.
1119 * @todo Perhaps use "screen -X" instead/as well, to help people
1120 * debugging without easy access to X. Perhaps use an environment
1121 * variable, or just call a script?
1123 * @todo The /proc/ magic probably only works on Linux (and
1124 * Solaris?) Can we be more portable?
1126 #ifdef MAINTAINER_MODE
1127 const char *get_panic_action(void)
1129 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1134 return "xterm -display :0 -T Panic -n Panic "
1135 "-e gdb /proc/%d/exe %d";
1140 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1142 * This signal handler is only installed if we were configured with
1143 * --enable-maintainer-mode. Perhaps it should always be on and we
1144 * should just look at the environment variable, but I'm a bit leery
1145 * of a signal sending us into a busy loop.
1147 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1152 sprintf(cmd_buf, get_panic_action(),
1153 getpid(), getpid());
1155 /* Unless we failed to execute gdb, we allow the process to
1156 * continue. I'm not sure if that's right. */
1157 ret = system(cmd_buf);
1164 int main(int argc,char *argv[])
1167 int orig_argc = argc;
1168 char **orig_argv = argv;
1169 #if defined HAVE_SIGACTION && defined HAVE_SIGPROCMASK
1172 sigemptyset(&sigmask);
1173 sigact.sa_flags = SA_NOCLDSTOP;
1175 SIGACTMASK(SIGUSR1, sigusr1_handler);
1176 SIGACTMASK(SIGUSR2, sigusr2_handler);
1177 SIGACTMASK(SIGCHLD, sigchld_handler);
1178 #ifdef MAINTAINER_MODE
1179 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1180 SIGACTMASK(SIGFPE, rsync_panic_handler);
1181 SIGACTMASK(SIGABRT, rsync_panic_handler);
1182 SIGACTMASK(SIGBUS, rsync_panic_handler);
1185 starttime = time(NULL);
1186 am_root = (MY_UID() == 0);
1188 memset(&stats, 0, sizeof(stats));
1192 exit_cleanup(RERR_SYNTAX);
1195 /* we set a 0 umask so that correct file permissions can be
1197 orig_umask = (int)umask(0);
1199 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1200 setlocale(LC_CTYPE, "");
1203 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1204 /* FIXME: We ought to call the same error-handling
1205 * code here, rather than relying on getopt. */
1207 exit_cleanup(RERR_SYNTAX);
1210 SIGACTMASK(SIGINT, sig_int);
1211 SIGACTMASK(SIGHUP, sig_int);
1212 SIGACTMASK(SIGTERM, sig_int);
1213 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1214 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1217 /* Ignore SIGPIPE; we consistently check error codes and will
1219 SIGACTION(SIGPIPE, SIG_IGN);
1221 /* Initialize push_dir here because on some old systems getcwd
1222 * (implemented by forking "pwd" and reading its output) doesn't
1223 * work when there are other child processes. Also, on all systems
1224 * that implement getcwd that way "pwd" can't be found after chroot. */
1229 if ((write_batch || read_batch) && !am_server) {
1231 write_batch_shell_file(orig_argc, orig_argv, argc);
1233 if (read_batch && strcmp(batch_name, "-") == 0)
1234 batch_fd = STDIN_FILENO;
1236 batch_fd = do_open(batch_name,
1237 write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1238 : O_RDONLY, S_IRUSR | S_IWUSR);
1241 rsyserr(FERROR, errno, "Batch file %s open error",
1242 full_fname(batch_name));
1243 exit_cleanup(RERR_FILEIO);
1246 read_stream_flags(batch_fd);
1248 if (write_batch < 0)
1251 if (am_daemon && !am_server)
1252 return daemon_main();
1256 exit_cleanup(RERR_SYNTAX);
1260 set_nonblocking(STDIN_FILENO);
1261 set_nonblocking(STDOUT_FILENO);
1263 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1264 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1267 ret = start_client(argc, argv);
1269 exit_cleanup(RERR_STARTCLIENT);