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.
26 extern struct stats stats;
27 extern char *files_from;
28 extern int filesfrom_fd;
29 extern char *remote_filesfrom_file;
34 extern int protocol_version;
36 /* there's probably never more than at most 2 outstanding child processes,
37 * but set it higher just in case.
39 #define MAXCHILDPROCS 5
44 } pid_stat_table[MAXCHILDPROCS];
46 static void show_malloc_stats(void);
48 /****************************************************************************
49 wait for a process to exit, calling io_flush while waiting
50 ****************************************************************************/
51 void wait_process(pid_t pid, int *status)
56 while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) {
61 if ((waited_pid == -1) && (errno == ECHILD)) {
62 /* status of requested child no longer available.
63 * check to see if it was processed by the sigchld_handler.
65 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
66 if (pid == pid_stat_table[cnt].pid) {
67 *status = pid_stat_table[cnt].status;
68 pid_stat_table[cnt].pid = 0;
74 /* TODO: If the child exited on a signal, then log an
75 * appropriate error message. Perhaps we should also accept a
76 * message describing the purpose of the child. Also indicate
77 * this to the caller so that thhey know something went
79 *status = WEXITSTATUS(*status);
82 static void report(int f)
84 time_t t = time(NULL);
88 if (do_stats && verbose > 1) {
89 /* These come out from every process */
95 log_exit(0, __FILE__, __LINE__);
96 if (f == -1 || !am_sender) return;
99 send_stats = verbose || protocol_version >= 20;
101 if (am_sender && send_stats) {
103 /* store total_written in a temporary
104 * because write_longint changes it */
105 w = stats.total_written;
106 write_longint(f,stats.total_read);
108 write_longint(f,stats.total_size);
113 /* this is the client */
115 if (!am_sender && send_stats) {
117 stats.total_written = read_longint(f);
118 /* store total_read in a temporary, read_longint changes it */
120 stats.total_size = read_longint(f);
121 stats.total_read = r;
125 if (!am_sender && !send_stats) {
126 /* missing the bytes written by the generator */
127 rprintf(FINFO, "\nCannot show stats as receiver because remote protocol version is less than 20\n");
128 rprintf(FINFO, "Use --stats -v to show stats\n");
131 rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files);
132 rprintf(FINFO,"Number of files transferred: %d\n",
133 stats.num_transferred_files);
134 rprintf(FINFO,"Total file size: %.0f bytes\n",
135 (double)stats.total_size);
136 rprintf(FINFO,"Total transferred file size: %.0f bytes\n",
137 (double)stats.total_transferred_size);
138 rprintf(FINFO,"Literal data: %.0f bytes\n",
139 (double)stats.literal_data);
140 rprintf(FINFO,"Matched data: %.0f bytes\n",
141 (double)stats.matched_data);
142 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
143 rprintf(FINFO,"Total bytes written: %.0f\n",
144 (double)stats.total_written);
145 rprintf(FINFO,"Total bytes read: %.0f\n",
146 (double)stats.total_read);
149 if (verbose || do_stats) {
150 rprintf(FINFO,"\nwrote %.0f bytes read %.0f bytes %.2f bytes/sec\n",
151 (double)stats.total_written,
152 (double)stats.total_read,
153 (stats.total_written+stats.total_read)/(0.5 + (t-starttime)));
154 rprintf(FINFO,"total size is %.0f speedup is %.2f\n",
155 (double)stats.total_size,
156 (1.0*stats.total_size)/(stats.total_written+stats.total_read));
165 * If our C library can get malloc statistics, then show them to FINFO
167 static void show_malloc_stats(void)
174 rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
176 am_server ? "server " : "",
177 am_daemon ? "daemon " : "",
178 am_sender ? "sender" : "receiver");
179 rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena);
180 rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks);
181 rprintf(FINFO, " smblks: %10d\n", mi.smblks);
182 rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks);
183 rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd);
184 rprintf(FINFO, " usmblks: %10d\n", mi.usmblks);
185 rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks);
186 rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks);
187 rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks);
188 rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost);
189 #endif /* HAVE_MALLINFO */
193 /* Start the remote shell. cmd may be NULL to use the default. */
194 static pid_t do_cmd(char *cmd,char *machine,char *user,char *path,int *f_in,int *f_out)
201 extern int local_server;
202 extern char *rsync_path;
203 extern int blocking_io;
204 extern int daemon_over_rsh;
205 extern int read_batch;
207 if (!read_batch && !local_server) {
208 char *rsh_env = getenv(RSYNC_RSH_ENV);
217 for (tok=strtok(cmd," ");tok;tok=strtok(NULL," ")) {
221 /* check to see if we've already been given '-l user' in
222 * the remote-shell command */
223 for (i = 0; i < argc-1; i++) {
224 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
229 /* remsh (on HPUX) takes the arguments the other way around */
230 args[argc++] = machine;
231 if (user && !(daemon_over_rsh && dash_l_set)) {
236 if (user && !(daemon_over_rsh && dash_l_set)) {
240 args[argc++] = machine;
243 args[argc++] = rsync_path;
245 if (blocking_io < 0) {
247 if ((cp = strrchr(cmd, '/')) != NULL)
251 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
255 server_options(args,&argc);
260 if (!daemon_over_rsh && path && *path)
266 rprintf(FINFO,"cmd=");
268 rprintf(FINFO,"%s ",args[i]);
274 create_flist_from_batch(); /* sets batch_flist */
275 ret = local_child(argc, args, f_in, f_out, child_main);
277 ret = piped_child(args,f_in,f_out);
285 out_of_memory("do_cmd");
286 return 0; /* not reached */
292 static char *get_local_name(struct file_list *flist,char *name)
296 extern int orig_umask;
299 rprintf(FINFO,"get_local_name count=%d %s\n",
300 flist->count, NS(name));
305 if (do_stat(name,&st) == 0) {
306 if (S_ISDIR(st.st_mode)) {
307 if (!push_dir(name, 0)) {
308 rprintf(FERROR, "push_dir %s failed: %s (1)\n",
309 full_fname(name), strerror(errno));
310 exit_cleanup(RERR_FILESELECT);
314 if (flist->count > 1) {
315 rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n");
316 exit_cleanup(RERR_FILESELECT);
321 if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/'))
324 if (do_mkdir(name,0777 & ~orig_umask) != 0) {
325 rprintf(FERROR, "mkdir %s failed: %s\n",
326 full_fname(name), strerror(errno));
327 exit_cleanup(RERR_FILEIO);
330 rprintf(FINFO,"created directory %s\n",name);
333 if (!push_dir(name, 0)) {
334 rprintf(FERROR, "push_dir %s failed: %s (2)\n",
335 full_fname(name), strerror(errno));
336 exit_cleanup(RERR_FILESELECT);
345 static void do_server_sender(int f_in, int f_out, int argc,char *argv[])
348 struct file_list *flist;
350 extern int relative_paths;
354 rprintf(FINFO,"server_sender starting pid=%d\n",(int)getpid());
356 if (!relative_paths && !push_dir(dir, 0)) {
357 rprintf(FERROR, "push_dir %s failed: %s (3)\n",
358 full_fname(dir), strerror(errno));
359 exit_cleanup(RERR_FILESELECT);
364 if (strcmp(dir,".")) {
366 if (strcmp(dir,"/") == 0)
372 if (argc == 0 && recurse) {
378 flist = send_file_list(f_out,argc,argv);
379 if (!flist || flist->count == 0) {
383 io_start_buffering_in(f_in);
384 io_start_buffering_out(f_out);
385 send_files(flist,f_out,f_in);
388 if (protocol_version >= 24) {
389 /* final goodbye message */
397 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
403 extern int preserve_hard_links;
404 extern int delete_after;
406 extern int delete_mode;
408 if (preserve_hard_links)
409 init_hard_links(flist);
412 /* I moved this here from recv_files() to prevent a race condition */
413 if (recurse && delete_mode && !local_name && flist->count>0) {
418 if (fd_pair(recv_pipe) < 0) {
419 rprintf(FERROR,"pipe failed in do_recv\n");
420 exit_cleanup(RERR_SOCKETIO);
423 if (fd_pair(error_pipe) < 0) {
424 rprintf(FERROR,"error pipe failed in do_recv\n");
425 exit_cleanup(RERR_SOCKETIO);
430 if ((pid=do_fork()) == 0) {
432 close(error_pipe[0]);
433 if (f_in != f_out) close(f_out);
435 /* we can't let two processes write to the socket at one time */
436 io_multiplexing_close();
438 /* set place to send errors */
439 set_error_fd(error_pipe[1]);
441 recv_files(f_in,flist,local_name,recv_pipe[1]);
445 write_int(recv_pipe[1],1);
448 /* finally we go to sleep until our parent kills us
449 * with a USR2 signal. We sleep for a short time as on
450 * some OSes a signal won't interrupt a sleep! */
456 close(error_pipe[1]);
457 if (f_in != f_out) close(f_in);
459 io_start_buffering_out(f_out);
461 io_set_error_fd(error_pipe[0]);
463 generate_files(f_out,flist,local_name,recv_pipe[0]);
465 read_int(recv_pipe[0]);
467 if (protocol_version >= 24) {
468 /* send a final goodbye message */
469 write_int(f_out, -1);
475 wait_process(pid, &status);
480 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
483 struct file_list *flist;
484 char *local_name=NULL;
486 extern int delete_mode;
487 extern int delete_excluded;
488 extern int module_id;
489 extern int read_batch;
490 extern struct file_list *batch_flist;
493 rprintf(FINFO,"server_recv(%d) starting pid=%d\n",argc,(int)getpid());
495 if (am_daemon && lp_read_only(module_id) && !am_sender) {
496 rprintf(FERROR,"ERROR: module is read only\n");
497 exit_cleanup(RERR_SYNTAX);
506 if (!am_daemon && !push_dir(dir, 0)) {
507 rprintf(FERROR, "push_dir %s failed: %s (4)\n",
508 full_fname(dir), strerror(errno));
509 exit_cleanup(RERR_FILESELECT);
513 io_start_buffering_in(f_in);
514 if (delete_mode && !delete_excluded)
515 recv_exclude_list(f_in);
517 if (filesfrom_fd >= 0) {
518 /* We're receiving the file info from the sender, so we need
519 * the IO routines to automatically write out the names onto
520 * our f_out socket as we read the list info from the sender.
521 * This avoids both deadlock and extra delays/buffers. */
522 io_set_filesfrom_fds(filesfrom_fd, f_out);
529 flist = recv_file_list(f_in);
531 rprintf(FERROR,"server_recv: recv_file_list error\n");
532 exit_cleanup(RERR_FILESELECT);
536 if (strcmp(dir,".")) {
537 argv[0] += strlen(dir);
538 if (argv[0][0] == '/') argv[0]++;
540 local_name = get_local_name(flist,argv[0]);
543 status = do_recv(f_in,f_out,flist,local_name);
544 exit_cleanup(status);
548 int child_main(int argc, char *argv[])
550 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
555 void start_server(int f_in, int f_out, int argc, char *argv[])
557 extern int cvs_exclude;
558 extern int read_batch;
560 setup_protocol(f_out, f_in);
562 set_nonblocking(f_in);
563 set_nonblocking(f_out);
565 if (protocol_version >= 23)
566 io_start_multiplex_out(f_out);
570 recv_exclude_list(f_in);
574 do_server_sender(f_in, f_out, argc, argv);
576 do_server_recv(f_in, f_out, argc, argv);
583 * This is called once the connection has been negotiated. It is used
584 * for rsyncd, remote-shell, and local connections.
586 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
588 struct file_list *flist = NULL;
589 int status = 0, status2 = 0;
590 char *local_name = NULL;
591 extern pid_t cleanup_child_pid;
592 extern int write_batch;
593 extern int read_batch;
594 extern struct file_list *batch_flist;
596 cleanup_child_pid = pid;
600 set_nonblocking(f_in);
601 set_nonblocking(f_out);
603 setup_protocol(f_out,f_in);
605 if (protocol_version >= 23)
606 io_start_multiplex_in(f_in);
609 extern int cvs_exclude;
610 extern int delete_mode;
611 extern int delete_excluded;
612 io_start_buffering_out(f_out);
615 if (delete_mode && !delete_excluded)
616 send_exclude_list(f_out);
617 if (remote_filesfrom_file)
619 if (!read_batch) /* don't write to pipe */
620 flist = send_file_list(f_out,argc,argv);
622 rprintf(FINFO,"file list sent\n");
625 io_start_buffering_out(f_out);
626 send_files(flist,f_out,f_in);
628 if (protocol_version >= 24) {
629 /* final goodbye message */
634 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
636 wait_process(pid, &status);
640 exit_cleanup(status);
644 extern int list_only;
649 send_exclude_list(f_out);
651 if (filesfrom_fd >= 0) {
652 io_set_filesfrom_fds(filesfrom_fd, f_out);
656 flist = recv_file_list(f_in);
657 if (!flist || flist->count == 0) {
658 rprintf(FINFO, "client: nothing to do: "
659 "perhaps you need to specify some filenames or "
660 "the --recursive option?\n");
664 local_name = get_local_name(flist,argv[0]);
666 status2 = do_recv(f_in,f_out,flist,local_name);
670 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
672 wait_process(pid, &status);
675 return MAX(status, status2);
678 static int copy_argv (char *argv[])
682 for (i = 0; argv[i]; i++) {
683 if (!(argv[i] = strdup(argv[i]))) {
684 rprintf (FERROR, "out of memory at %s(%d)\n",
695 * Start a client for either type of remote connection. Work out
696 * whether the arguments request a remote shell or rsyncd connection,
697 * and call the appropriate connection function, then run_client.
699 * Calls either start_socket_client (for sockets) or do_cmd and
700 * client_run (for ssh).
702 static int start_client(int argc, char *argv[])
705 char *shell_machine = NULL;
706 char *shell_path = NULL;
707 char *shell_user = NULL;
711 extern int local_server;
712 extern char *shell_cmd;
713 extern int rsync_port;
714 extern int daemon_over_rsh;
715 extern int read_batch;
718 /* Don't clobber argv[] so that ps(1) can still show the right
720 if ((rc = copy_argv(argv)))
723 /* rsync:// always uses rsync server over direct socket connection */
724 if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0) {
727 host = argv[0] + strlen(URL_PREFIX);
728 p = strchr(host,'/');
735 p = strchr(host,':');
737 rsync_port = atoi(p+1);
740 return start_socket_client(host, path, argc-1, argv+1);
744 p = find_colon(argv[0]);
746 if (remote_filesfrom_file
747 && remote_filesfrom_file != files_from + 1
748 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) {
750 "--files-from hostname is not transfer hostname\n");
751 exit_cleanup(RERR_SYNTAX);
753 if (p[1] == ':') { /* double colon */
756 return start_socket_client(argv[0], p+2,
765 exit_cleanup(RERR_SYNTAX);
770 shell_machine = argv[0];
777 /* rsync:// destination uses rsync server over direct socket */
778 if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) {
781 host = argv[argc-1] + strlen(URL_PREFIX);
782 p = strchr(host,'/');
789 p = strchr(host,':');
791 rsync_port = atoi(p+1);
794 return start_socket_client(host, path, argc-1, argv);
797 p = find_colon(argv[argc-1]);
798 if (p && remote_filesfrom_file
799 && remote_filesfrom_file != files_from + 1
800 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) {
802 "--files-from hostname is not transfer hostname\n");
803 exit_cleanup(RERR_SYNTAX);
807 if (remote_filesfrom_file) {
809 "--files-from is remote but transfer is local\n");
810 exit_cleanup(RERR_SYNTAX);
812 } else if (p[1] == ':') { /* double colon */
815 return start_socket_client(argv[argc-1], p+2,
824 exit_cleanup(RERR_SYNTAX);
828 shell_machine = NULL;
829 shell_path = argv[argc-1];
832 shell_machine = argv[argc-1];
840 shell_path = argv[argc-1];
844 p = strchr(shell_machine,'@');
847 shell_user = shell_machine;
853 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
854 shell_cmd?shell_cmd:"",
855 shell_machine?shell_machine:"",
856 shell_user?shell_user:"",
857 shell_path?shell_path:"");
860 if (!am_sender && argc > 1) {
862 exit_cleanup(RERR_SYNTAX);
865 if (argc == 0 && !am_sender) {
866 extern int list_only;
870 pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
873 /* if we're running an rsync server on the remote host over a
874 * remote shell command, we need to do the RSYNCD protocol first */
875 if (daemon_over_rsh) {
877 tmpret = start_inband_exchange(shell_user, shell_path,
883 ret = client_run(f_in, f_out, pid, argc, argv);
892 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
894 exit_cleanup(RERR_SIGNAL);
897 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
899 extern int log_got_error;
900 if (log_got_error) _exit(RERR_PARTIAL);
904 static RETSIGTYPE sigchld_handler(UNUSED(int val))
909 /* An empty waitpid() loop was put here by Tridge and we could never
910 * get him to explain why he put it in, so rather than taking it
911 * out we're instead saving the child exit statuses for later use.
912 * The waitpid() loop presumably eliminates all possibility of leaving
913 * zombie children, maybe that's why he did it.
915 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
916 /* save the child's exit status */
917 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
918 if (pid_stat_table[cnt].pid == 0) {
919 pid_stat_table[cnt].pid = pid;
920 pid_stat_table[cnt].status = status;
930 * This routine catches signals and tries to send them to gdb.
932 * Because it's called from inside a signal handler it ought not to
933 * use too many library routines.
935 * @todo Perhaps use "screen -X" instead/as well, to help people
936 * debugging without easy access to X. Perhaps use an environment
937 * variable, or just call a script?
939 * @todo The /proc/ magic probably only works on Linux (and
940 * Solaris?) Can we be more portable?
942 #ifdef MAINTAINER_MODE
943 const char *get_panic_action(void)
945 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
950 return "xterm -display :0 -T Panic -n Panic "
951 "-e gdb /proc/%d/exe %d";
956 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
958 * This signal handler is only installed if we were configured with
959 * --enable-maintainer-mode. Perhaps it should always be on and we
960 * should just look at the environment variable, but I'm a bit leery
961 * of a signal sending us into a busy loop.
963 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
968 sprintf(cmd_buf, get_panic_action(),
971 /* Unless we failed to execute gdb, we allow the process to
972 * continue. I'm not sure if that's right. */
973 ret = system(cmd_buf);
980 int main(int argc,char *argv[])
983 extern int orig_umask;
986 extern int write_batch;
993 signal(SIGUSR1, sigusr1_handler);
994 signal(SIGUSR2, sigusr2_handler);
995 signal(SIGCHLD, sigchld_handler);
996 #ifdef MAINTAINER_MODE
997 signal(SIGSEGV, rsync_panic_handler);
998 signal(SIGFPE, rsync_panic_handler);
999 signal(SIGABRT, rsync_panic_handler);
1000 signal(SIGBUS, rsync_panic_handler);
1001 #endif /* def MAINTAINER_MODE */
1003 starttime = time(NULL);
1004 am_root = (getuid() == 0);
1006 memset(&stats, 0, sizeof(stats));
1010 exit_cleanup(RERR_SYNTAX);
1013 /* we set a 0 umask so that correct file permissions can be
1015 orig_umask = (int)umask(0);
1017 if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1018 /* FIXME: We ought to call the same error-handling
1019 * code here, rather than relying on getopt. */
1021 exit_cleanup(RERR_SYNTAX);
1024 signal(SIGINT,SIGNAL_CAST sig_int);
1025 signal(SIGHUP,SIGNAL_CAST sig_int);
1026 signal(SIGTERM,SIGNAL_CAST sig_int);
1028 /* Ignore SIGPIPE; we consistently check error codes and will
1030 signal(SIGPIPE, SIG_IGN);
1032 /* Initialize push_dir here because on some old systems getcwd
1033 * (implemented by forking "pwd" and reading its output) doesn't
1034 * work when there are other child processes. Also, on all systems
1035 * that implement getcwd that way "pwd" can't be found after chroot. */
1038 if (write_batch && !am_server) {
1039 write_batch_argvs_file(orig_argc, orig_argv);
1042 if (am_daemon && !am_server)
1043 return daemon_main();
1047 exit_cleanup(RERR_SYNTAX);
1051 verbose = MAX(verbose,1);
1053 #ifndef SUPPORT_LINKS
1054 if (!am_server && preserve_links) {
1055 rprintf(FERROR,"ERROR: symbolic links not supported\n");
1056 exit_cleanup(RERR_UNSUPPORTED);
1061 set_nonblocking(STDIN_FILENO);
1062 set_nonblocking(STDOUT_FILENO);
1064 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1065 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1068 ret = start_client(argc, argv);
1070 exit_cleanup(RERR_STARTCLIENT);