2 Copyright (C) Andrew Tridgell 1998
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /* the socket based protocol for setting up a connection wit rsyncd */
26 extern int rsync_port;
28 int start_socket_client(char *host, char *path, int argc, char *argv[])
31 char *sargs[MAX_ARGS];
33 char line[MAXPATHLEN];
35 extern int remote_version;
40 rprintf(FERROR,"ERROR: The remote path must start with a module name\n");
44 p = strchr(host, '@');
51 if (!user) user = getenv("USER");
52 if (!user) user = getenv("LOGNAME");
56 fd = open_socket_out(host, rsync_port);
61 server_options(sargs,&sargc);
66 sargs[sargc++] = path;
70 io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
72 if (!read_line(fd, line, sizeof(line)-1)) {
76 if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
82 io_printf(fd,"%s\n",path);
86 if (!read_line(fd, line, sizeof(line)-1)) {
90 if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) {
91 auth_client(fd, user, line+18);
95 if (strcmp(line,"@RSYNCD: OK") == 0) break;
96 rprintf(FINFO,"%s\n", line);
99 for (i=0;i<sargc;i++) {
100 io_printf(fd,"%s\n", sargs[i]);
104 if (remote_version > 17 && !am_sender)
105 io_start_multiplex_in(fd);
107 return client_run(fd, fd, -1, argc, argv);
112 static int rsync_module(int fd, int i)
115 char *argv[MAX_ARGS];
117 char line[MAXPATHLEN];
118 uid_t uid = (uid_t)-2;
119 gid_t gid = (gid_t)-2;
121 char *addr = client_addr(fd);
122 char *host = client_name(fd);
123 char *name = lp_name(i);
128 extern int am_sender;
129 extern int remote_version;
132 if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
133 rprintf(FERROR,"rsync denied on module %s from %s (%s)\n",
134 name, client_name(fd), client_addr(fd));
135 io_printf(fd,"@ERROR: access denied to %s from %s (%s)\n",
136 name, client_name(fd), client_addr(fd));
140 if (!claim_connection(lp_lock_file(), lp_max_connections())) {
142 rprintf(FERROR,"failed to open lock file %s : %s\n",
143 lp_lock_file(), strerror(errno));
144 io_printf(fd,"@ERROR: failed to open lock file %s : %s\n",
145 lp_lock_file(), strerror(errno));
147 rprintf(FERROR,"max connections (%d) reached\n",
148 lp_max_connections());
149 io_printf(fd,"@ERROR: max connections (%d) reached - try again later\n", lp_max_connections());
155 user = auth_server(fd, i, addr, "@RSYNCD: AUTHREQD ");
158 rprintf(FERROR,"auth failed on module %s from %s (%s)\n",
159 name, client_name(fd), client_addr(fd));
160 io_printf(fd,"@ERROR: auth failed on module %s\n",name);
170 if (!name_to_uid(p, &uid)) {
172 rprintf(FERROR,"Invalid uid %s\n", p);
173 io_printf(fd,"@ERROR: invalid uid\n");
180 if (!name_to_gid(p, &gid)) {
182 rprintf(FERROR,"Invalid gid %s\n", p);
183 io_printf(fd,"@ERROR: invalid gid\n");
189 p = lp_exclude_from(i);
190 add_exclude_file(p, 1, 0);
197 if (chroot(lp_path(i))) {
198 rprintf(FERROR,"chroot %s failed\n", lp_path(i));
199 io_printf(fd,"@ERROR: chroot failed\n");
204 rprintf(FERROR,"chdir %s failed\n", lp_path(i));
205 io_printf(fd,"@ERROR: chdir failed\n");
209 if (setgid(gid) || getgid() != gid) {
210 rprintf(FERROR,"setgid %d failed\n", gid);
211 io_printf(fd,"@ERROR: setgid failed\n");
215 if (setuid(uid) || getuid() != uid) {
216 rprintf(FERROR,"setuid %d failed\n", uid);
217 io_printf(fd,"@ERROR: setuid failed\n");
221 am_root = (getuid() == 0);
223 io_printf(fd,"@RSYNCD: OK\n");
225 argv[argc++] = "rsyncd";
228 if (!read_line(fd, line, sizeof(line)-1)) {
236 argv[argc] = strdup(p);
242 if (start_glob == 1) {
246 glob_expand(name, argv, &argc, MAX_ARGS);
251 if (strcmp(line,".") == 0) {
255 if (argc == MAX_ARGS) {
260 ret = parse_arguments(argc, argv);
264 rprintf(FINFO,"rsync %s %s from %s@%s (%s)\n",
266 request, user, host, addr);
268 rprintf(FINFO,"rsync %s %s from %s (%s)\n",
270 request, host, addr);
276 /* don't allow the logs to be flooded too fast */
277 if (verbose > 1) verbose = 1;
281 argp = argv + optind;
284 if (remote_version > 17 && am_sender)
285 io_start_multiplex_out(fd);
288 rprintf(FERROR,"Error parsing options (unsupported option?) - aborting\n");
292 start_server(fd, fd, argc, argp);
297 /* send a list of available modules to the client. Don't list those
298 with "list = False". */
299 static void send_listing(int fd)
301 int n = lp_numservices();
306 io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
309 /* this is called when a socket connection is established to a client
310 and we want to start talking. The setup of the system is done from
312 static int start_daemon(int fd)
317 extern char *config_file;
318 extern int remote_version;
320 if (!lp_load(config_file, 0)) {
324 set_socket_options(fd,"SO_KEEPALIVE");
325 set_socket_options(fd,lp_socket_options());
328 io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
330 motd = lp_motd_file();
332 FILE *f = fopen(motd,"r");
333 while (f && !feof(f)) {
334 int len = fread(line, 1, sizeof(line)-1, f);
337 io_printf(fd,"%s", line);
344 if (!read_line(fd, line, sizeof(line)-1)) {
348 if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
349 io_printf(fd,"@ERROR: protocol startup error\n");
355 if (!read_line(fd, line, sizeof(line)-1)) {
359 if (!*line || strcmp(line,"#list")==0) {
365 /* it's some sort of command that I don't understand */
366 io_printf(fd,"@ERROR: Unknown command '%s'\n", line);
372 io_printf(fd,"@ERROR: Unknown module '%s'\n", line);
377 return rsync_module(fd, i);
381 int daemon_main(void)
383 extern char *config_file;
385 /* this ensures that we don't call getcwd after the chroot,
386 which doesn't work on platforms that use popen("pwd","r")
390 if (is_a_socket(STDIN_FILENO)) {
393 /* we are running via inetd - close off stdout and
394 stderr so that library functions (and getopt) don't
395 try to use them. Redirect them to /dev/null */
398 open("/dev/null", O_RDWR);
401 set_nonblocking(STDIN_FILENO);
403 return start_daemon(STDIN_FILENO);
408 if (!lp_load(config_file, 1)) {
409 fprintf(stderr,"failed to load config file %s\n", config_file);
415 rprintf(FINFO,"rsyncd version %s starting\n",VERSION);
417 start_accept_loop(rsync_port, start_daemon);