2 * The socket based protocol for setting up a connection with rsyncd.
4 * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
5 * Copyright (C) 2001-2002 Martin Pool <mbp@samba.org>
6 * Copyright (C) 2002-2007 Wayne Davison
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, visit the http://fsf.org website.
27 extern int output_motd;
33 extern int rsync_port;
34 extern int ignore_errors;
35 extern int kluge_around_eof;
36 extern int daemon_over_rsh;
37 extern int sanitize_paths;
38 extern int filesfrom_fd;
39 extern int remote_protocol;
40 extern int protocol_version;
41 extern int io_timeout;
43 extern int write_batch;
44 extern int default_af_hint;
45 extern int logfile_format_has_i;
46 extern int logfile_format_has_o_or_i;
47 extern mode_t orig_umask;
48 extern char *bind_address;
49 extern char *sockopts;
50 extern char *config_file;
51 extern char *logfile_format;
52 extern char *files_from;
54 extern struct chmod_mode_struct *chmod_modes;
55 extern struct filter_list_struct server_filter_list;
56 extern char curr_dir[];
61 struct chmod_mode_struct *daemon_chmod_modes;
63 /* module_dirlen is the length of the module_dir string when in daemon
64 * mode, not chrooted, and the path is not "/"; otherwise 0. */
65 char *module_dir = NULL;
66 unsigned int module_dirlen = 0;
68 static int rl_nulls = 0;
71 static struct sigaction sigact;
75 * Run a client connected to an rsyncd. The alternative to this
76 * function for remote-shell connections is do_cmd().
78 * After negotiating which module to use and reading the server's
79 * motd, this hands over to client_run(). Telling the server the
80 * module will cause it to chroot/setuid/etc.
82 * Instead of doing a transfer, the client may at this stage instead
83 * get a listing of remote modules and exit.
85 * @return -1 for error in startup, or the result of client_run().
86 * Either way, it eventually gets passed to exit_cleanup().
88 int start_socket_client(char *host, int remote_argc, char *remote_argv[],
89 int argc, char *argv[])
92 char *p, *user = NULL;
94 /* This is redundant with code in start_inband_exchange(), but this
95 * short-circuits a problem in the client before we open a socket,
96 * and the extra check won't hurt. */
97 if (**remote_argv == '/') {
99 "ERROR: The remote path must start with a module name not a /\n");
103 if ((p = strrchr(host, '@')) != NULL) {
109 fd = open_socket_out_wrapped(host, rsync_port, bind_address,
112 exit_cleanup(RERR_SOCKETIO);
114 set_socket_options(fd, sockopts);
116 ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv);
118 return ret ? ret : client_run(fd, fd, -1, argc, argv);
121 static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client)
124 #if SUBPROTOCOL_VERSION != 0
125 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
131 io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub);
134 motd = lp_motd_file();
136 FILE *f = fopen(motd,"r");
137 while (f && !feof(f)) {
138 int len = fread(buf, 1, bufsiz - 1, f);
140 write_buf(f_out, buf, len);
144 write_sbuf(f_out, "\n");
148 /* This strips the \n. */
149 if (!read_line_old(f_in, buf, bufsiz)) {
151 rprintf(FERROR, "rsync: did not see server greeting\n");
155 if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) {
157 rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf);
159 io_printf(f_out, "@ERROR: protocol startup error\n");
163 if (remote_sub < 0) {
164 if (remote_protocol == 30) {
166 rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n");
168 io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n");
174 if (protocol_version > remote_protocol) {
175 protocol_version = remote_protocol;
178 } else if (protocol_version == remote_protocol) {
179 if (remote_sub != our_sub)
182 #if SUBPROTOCOL_VERSION != 0
183 else if (protocol_version < remote_protocol) {
189 if (protocol_version >= 30)
195 int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[])
198 char line[BIGPATHBUFLEN];
199 char *sargs[MAX_ARGS];
207 "ERROR: The remote path must start with a module name\n");
211 if (!(p = strchr(*argv, '/')))
212 modlen = strlen(*argv);
216 if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */
217 out_of_memory("start_inband_exchange");
218 strlcpy(modname, *argv, modlen + 1);
219 modname[modlen] = '/';
220 modname[modlen+1] = '\0';
223 user = getenv("USER");
225 user = getenv("LOGNAME");
227 if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0)
230 /* set daemon_over_rsh to false since we need to build the
231 * true set of args passed through the rsh/ssh connection;
232 * this is a no-op for direct-socket-connection mode */
234 server_options(sargs, &sargc);
236 if (sargc >= MAX_ARGS - 2)
239 sargs[sargc++] = ".";
242 if (sargc >= MAX_ARGS - 1) {
244 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
245 exit_cleanup(RERR_SYNTAX);
247 if (list_only && strncmp(*argv, modname, modlen) == 0
248 && argv[0][modlen] == '\0')
249 sargs[sargc++] = modname; /* we send "modname/" */
251 sargs[sargc++] = *argv;
259 print_child_argv("sending daemon args:", sargs);
261 io_printf(f_out, "%.*s\n", modlen, modname);
263 /* Old servers may just drop the connection here,
264 rather than sending a proper EXIT command. Yuck. */
265 kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0;
268 if (!read_line_old(f_in, line, sizeof line)) {
269 rprintf(FERROR, "rsync: didn't get server startup line\n");
273 if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) {
274 auth_client(f_out, user, line+18);
278 if (strcmp(line,"@RSYNCD: OK") == 0)
281 if (strcmp(line,"@RSYNCD: EXIT") == 0) {
282 /* This is sent by recent versions of the
283 * server to terminate the listing of modules.
284 * We don't want to go on and transfer
285 * anything; just exit. */
289 if (strncmp(line, "@ERROR", 6) == 0) {
290 rprintf(FERROR, "%s\n", line);
291 /* This is always fatal; the server will now
292 * close the socket. */
296 /* This might be a MOTD line or a module listing, but there is
297 * no way to differentiate it. The manpage mentions this. */
299 rprintf(FINFO, "%s\n", line);
301 kluge_around_eof = 0;
304 for (i = 0; i < sargc; i++) {
305 write_sbuf(f_out, sargs[i]);
306 write_byte(f_out, 0);
308 write_byte(f_out, 0);
310 for (i = 0; i < sargc; i++)
311 io_printf(f_out, "%s\n", sargs[i]);
312 write_sbuf(f_out, "\n");
315 if (protocol_version < 23) {
316 if (protocol_version == 22 || !am_sender)
317 io_start_multiplex_in();
325 static char *finish_pre_exec(pid_t pid, int fd, char *request,
326 int argc, char *argv[])
333 write_buf(fd, request, strlen(request)+1);
334 for (j = 0; j < argc; j++)
335 write_buf(fd, argv[j], strlen(argv[j])+1);
340 if (wait_process(pid, &status, 0) < 0
341 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
343 if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n",
344 status, status < 0 ? ": " : "",
345 status < 0 ? strerror(errno) : "") < 0)
346 out_of_memory("finish_pre_exec");
352 static int read_arg_from_pipe(int fd, char *buf, int limit)
354 char *bp = buf, *eob = buf + limit - 1;
357 if (read(fd, bp, 1) != 1)
369 static int rsync_module(int f_in, int f_out, int i, char *addr, char *host)
373 char line[BIGPATHBUFLEN];
374 uid_t uid = (uid_t)-2; /* canonically "nobody" */
375 gid_t gid = (gid_t)-2;
376 char *p, *err_msg = NULL;
377 char *name = lp_name(i);
378 int use_chroot = lp_use_chroot(i);
379 int ret, pre_exec_fd = -1;
380 pid_t pre_exec_pid = 0;
381 char *request = NULL;
383 if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
384 rprintf(FLOG, "rsync denied on module %s from %s (%s)\n",
387 io_printf(f_out, "@ERROR: Unknown module '%s'\n", name);
390 "@ERROR: access denied to %s from %s (%s)\n",
396 if (am_daemon && am_server) {
397 rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n",
401 if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) {
403 rsyserr(FLOG, errno, "failed to open lock file %s",
405 io_printf(f_out, "@ERROR: failed to open lock file\n");
407 rprintf(FLOG, "max connections (%d) reached\n",
408 lp_max_connections(i));
409 io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n",
410 lp_max_connections(i));
415 auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD ");
418 io_printf(f_out, "@ERROR: auth failed on module %s\n", name);
427 if (lp_transfer_logging(i) && !logfile_format)
428 logfile_format = lp_log_format(i);
429 if (log_format_has(logfile_format, 'i'))
430 logfile_format_has_i = 1;
431 if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
432 logfile_format_has_o_or_i = 1;
434 am_root = (MY_UID() == 0);
438 if (!name_to_uid(p, &uid)) {
440 rprintf(FLOG, "Invalid uid %s\n", p);
441 io_printf(f_out, "@ERROR: invalid uid %s\n", p);
448 if (!name_to_gid(p, &gid)) {
450 rprintf(FLOG, "Invalid gid %s\n", p);
451 io_printf(f_out, "@ERROR: invalid gid %s\n", p);
458 /* TODO: If we're not root, but the configuration requests
459 * that we change to some uid other than the current one, then
462 /* TODO: Perhaps take a list of gids, and make them into the
463 * supplementary groups. */
465 /* We do a push_dir() without actually calling chdir() in order
466 * to make sure that the module's path is absolute. After this
467 * check, module_dir will be set to an absolute path. */
468 module_dir = lp_path(i);
469 strlcpy(line, curr_dir, sizeof line);
470 if (!push_dir(module_dir, 1))
472 if (strcmp(curr_dir, module_dir) != 0)
473 module_dir = strdup(curr_dir);
474 push_dir(line, 1); /* Restore curr_dir. */
476 if (use_chroot || (module_dirlen = strlen(module_dir)) == 1) {
478 set_filter_dir("/", 1);
480 set_filter_dir(module_dir, module_dirlen);
483 parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT,
486 p = lp_include_from(i);
487 parse_filter_file(&server_filter_list, p, MATCHFLG_INCLUDE,
488 XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS);
491 parse_rule(&server_filter_list, p,
492 MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT,
493 XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES);
495 p = lp_exclude_from(i);
496 parse_filter_file(&server_filter_list, p, 0,
497 XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS);
500 parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT,
501 XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES);
506 if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) {
507 char *modname, *modpath, *hostaddr, *hostname, *username;
509 if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0
510 || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", module_dir) < 0
511 || asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0
512 || asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0
513 || asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0)
514 out_of_memory("rsync_module");
521 /* For post-xfer exec, fork a new process to run the rsync
522 * daemon while this process waits for the exit status and
523 * runs the indicated command at that point. */
524 if (*lp_postxfer_exec(i)) {
527 rsyserr(FLOG, errno, "fork failed");
528 io_printf(f_out, "@ERROR: fork failed\n");
532 if (asprintf(&p, "RSYNC_PID=%ld", (long)pid) > 0)
534 if (wait_process(pid, &status, 0) < 0)
536 if (asprintf(&p, "RSYNC_RAW_STATUS=%d", status) > 0)
538 if (WIFEXITED(status))
539 status = WEXITSTATUS(status);
542 if (asprintf(&p, "RSYNC_EXIT_STATUS=%d", status) > 0)
544 system(lp_postxfer_exec(i));
548 /* For pre-xfer exec, fork a child process to run the indicated
549 * command, though it first waits for the parent process to
550 * send us the user's request via a pipe. */
551 if (*lp_prexfer_exec(i)) {
553 if (asprintf(&p, "RSYNC_PID=%ld", (long)getpid()) > 0)
555 if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) {
556 rsyserr(FLOG, errno, "pre-xfer exec preparation failed");
557 io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n");
560 if (pre_exec_pid == 0) {
561 char buf[BIGPATHBUFLEN];
564 set_blocking(fds[0]);
565 len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN);
568 if (asprintf(&p, "RSYNC_REQUEST=%s", buf) > 0)
571 len = read_arg_from_pipe(fds[0], buf,
578 if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0)
583 close(STDOUT_FILENO);
584 status = system(lp_prexfer_exec(i));
585 if (!WIFEXITED(status))
587 _exit(WEXITSTATUS(status));
590 set_blocking(fds[1]);
591 pre_exec_fd = fds[1];
599 * XXX: The 'use chroot' flag is a fairly reliable
600 * source of confusion, because it fails under two
601 * important circumstances: running as non-root,
602 * running on Win32 (or possibly others). On the
603 * other hand, if you are running as root, then it
604 * might be better to always use chroot.
606 * So, perhaps if we can't chroot we should just issue
607 * a warning, unless a "require chroot" flag is set,
608 * in which case we fail.
610 if (chroot(module_dir)) {
611 rsyserr(FLOG, errno, "chroot %s failed", module_dir);
612 io_printf(f_out, "@ERROR: chroot failed\n");
615 if (!push_dir("/", 0))
618 if (!push_dir(module_dir, 0)) {
620 rsyserr(FLOG, errno, "chdir %s failed\n", module_dir);
621 io_printf(f_out, "@ERROR: chdir failed\n");
628 /* XXXX: You could argue that if the daemon is started
629 * by a non-root user and they explicitly specify a
630 * gid, then we should try to change to that gid --
631 * this could be possible if it's already in their
632 * supplementary groups. */
634 /* TODO: Perhaps we need to document that if rsyncd is
635 * started by somebody other than root it will inherit
636 * all their supplementary groups. */
639 rsyserr(FLOG, errno, "setgid %d failed", (int)gid);
640 io_printf(f_out, "@ERROR: setgid failed\n");
643 #ifdef HAVE_SETGROUPS
644 /* Get rid of any supplementary groups this process
645 * might have inheristed. */
646 if (setgroups(1, &gid)) {
647 rsyserr(FLOG, errno, "setgroups failed");
648 io_printf(f_out, "@ERROR: setgroups failed\n");
654 rsyserr(FLOG, errno, "setuid %d failed", (int)uid);
655 io_printf(f_out, "@ERROR: setuid failed\n");
659 am_root = (MY_UID() == 0);
662 if (lp_temp_dir(i) && *lp_temp_dir(i)) {
663 tmpdir = lp_temp_dir(i);
664 if (strlen(tmpdir) >= MAXPATHLEN - 10) {
666 "the 'temp dir' value for %s is WAY too long -- ignoring.\n",
672 io_printf(f_out, "@RSYNCD: OK\n");
674 opt_cnt = read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request);
677 err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request,
681 verbose = 0; /* future verbosity is controlled by client options */
682 ret = parse_arguments(&argc, (const char ***) &argv, 0);
683 am_server = 1; /* Don't let someone try to be tricky. */
684 if (lp_ignore_errors(module_id))
689 if (lp_fake_super(i))
691 else if (am_root < 0) /* Treat --fake-super from client as --super. */
694 if (filesfrom_fd == 0)
699 rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n",
700 am_sender ? "on" : "to",
701 request, auth_user, host, addr);
703 rprintf(FLOG, "rsync %s %s from %s (%s)\n",
704 am_sender ? "on" : "to",
705 request, host, addr);
711 /* don't allow the logs to be flooded too fast */
712 if (verbose > lp_max_verbosity(i))
713 verbose = lp_max_verbosity(i);
716 if (protocol_version < 23
717 && (protocol_version == 22 || am_sender))
718 io_start_multiplex_out();
719 else if (!ret || err_msg) {
720 /* We have to get I/O multiplexing started so that we can
721 * get the error back to the client. This means getting
722 * the protocol setup finished first in later versions. */
723 setup_protocol(f_out, f_in);
725 /* Since we failed in our option parsing, we may not
726 * have finished parsing that the client sent us a
727 * --files-from option, so look for it manually.
728 * Without this, the socket would be in the wrong
729 * state for the upcoming error message. */
732 for (i = 0; i < argc; i++) {
733 if (strncmp(argv[i], "--files-from", 12) == 0) {
740 write_byte(f_out, 0);
742 io_start_multiplex_out();
745 if (!ret || err_msg) {
747 rwrite(FERROR, err_msg, strlen(err_msg), 0);
751 exit_cleanup(RERR_UNSUPPORTED);
754 if (lp_timeout(i) && lp_timeout(i) > io_timeout)
755 set_io_timeout(lp_timeout(i));
757 /* If we have some incoming/outgoing chmod changes, append them to
758 * any user-specified changes (making our changes have priority).
759 * We also get a pointer to just our changes so that a receiver
760 * process can use them separately if --perms wasn't specified. */
762 p = lp_outgoing_chmod(i);
764 p = lp_incoming_chmod(i);
765 if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) {
766 rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n",
767 am_sender ? "outgo" : "incom", p);
770 start_server(f_in, f_out, argc, argv);
775 /* send a list of available modules to the client. Don't list those
776 with "list = False". */
777 static void send_listing(int fd)
779 int n = lp_numservices();
782 for (i = 0; i < n; i++) {
784 io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
787 if (protocol_version >= 25)
788 io_printf(fd,"@RSYNCD: EXIT\n");
791 /* this is called when a connection is established to a client
792 and we want to start talking. The setup of the system is done from
794 int start_daemon(int f_in, int f_out)
800 io_set_sock_fds(f_in, f_out);
802 /* We must load the config file before calling any function that
803 * might cause log-file output to occur. This ensures that the
804 * "log file" param gets honored for the 2 non-forked use-cases
805 * (when rsync is run by init and run by a remote shell). */
806 if (!lp_load(config_file, 0))
807 exit_cleanup(RERR_SYNTAX);
809 addr = client_addr(f_in);
810 host = client_name(f_in);
811 rprintf(FLOG, "connect from %s (%s)\n", host, addr);
814 set_socket_options(f_in, "SO_KEEPALIVE");
816 set_socket_options(f_in, sockopts);
818 set_socket_options(f_in, lp_socket_options());
819 set_nonblocking(f_in);
822 if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0)
826 if (!read_line_old(f_in, line, sizeof line))
829 if (!*line || strcmp(line, "#list") == 0) {
830 rprintf(FLOG, "module-list request from %s (%s)\n",
837 /* it's some sort of command that I don't understand */
838 io_printf(f_out, "@ERROR: Unknown command '%s'\n", line);
842 if ((i = lp_number(line)) < 0) {
843 rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n",
845 io_printf(f_out, "@ERROR: Unknown module '%s'\n", line);
849 #ifdef HAVE_SIGACTION
850 sigact.sa_flags = SA_NOCLDSTOP;
852 SIGACTION(SIGCHLD, remember_children);
854 return rsync_module(f_in, f_out, i, addr, host);
857 static void create_pid_file(void)
859 char *pid_file = lp_pid_file();
861 pid_t pid = getpid();
864 if (!pid_file || !*pid_file)
867 cleanup_set_pid(pid);
868 if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666 & ~orig_umask)) == -1) {
870 fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno));
871 rsyserr(FLOG, errno, "failed to create pid file %s", pid_file);
872 exit_cleanup(RERR_FILEIO);
874 snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
875 write(fd, pidbuf, strlen(pidbuf));
879 /* Become a daemon, discarding the controlling terminal. */
880 static void become_daemon(void)
887 fprintf(stderr, "failed to fork: %s\n", strerror(errno));
888 exit_cleanup(RERR_FILEIO);
895 /* detach from the terminal */
898 #elif defined TIOCNOTTY
899 i = open("/dev/tty", O_RDWR);
901 ioctl(i, (int)TIOCNOTTY, (char *)0);
905 /* make sure that stdin, stdout an stderr don't stuff things
906 * up (library functions, for example) */
907 for (i = 0; i < 3; i++) {
909 open("/dev/null", O_RDWR);
913 int daemon_main(void)
916 if (am_server && am_root <= 0)
917 config_file = RSYNCD_USERCONF;
919 config_file = RSYNCD_SYSCONF;
922 if (is_a_socket(STDIN_FILENO)) {
925 /* we are running via inetd - close off stdout and
926 * stderr so that library functions (and getopt) don't
927 * try to use them. Redirect them to /dev/null */
928 for (i = 1; i < 3; i++) {
930 open("/dev/null", O_RDWR);
933 return start_daemon(STDIN_FILENO, STDIN_FILENO);
936 if (!lp_load(config_file, 1)) {
937 fprintf(stderr, "Failed to parse config file: %s\n", config_file);
938 exit_cleanup(RERR_SYNTAX);
946 if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0)
947 rsync_port = RSYNC_PORT;
948 if (bind_address == NULL && *lp_bind_address())
949 bind_address = lp_bind_address();
953 rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n",
954 RSYNC_VERSION, rsync_port);
955 /* TODO: If listening on a particular address, then show that
956 * address too. In fact, why not just do inet_ntop on the
957 * local address??? */
959 start_accept_loop(rsync_port, start_daemon);