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];
35 extern int remote_version;
37 fd = open_socket_out(host, rsync_port);
42 server_options(sargs,&sargc);
47 sargs[sargc++] = path;
51 if (!read_line(fd, line, sizeof(line)-1)) {
55 if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
59 io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
63 io_printf(fd,"%s\n",path);
67 if (!read_line(fd, line, sizeof(line)-1)) {
70 if (strcmp(line,"@RSYNCD: OK") == 0) break;
71 rprintf(FINFO,"%s\n", line);
74 for (i=0;i<sargc;i++) {
75 io_printf(fd,"%s\n", sargs[i]);
81 if (!read_line(fd, line, sizeof(line)-1)) {
84 rprintf(FINFO,"%s\n", line);
88 return client_run(fd, fd, -1, argc, argv);
93 static int rsync_module(int fd, int i)
102 char *addr = client_addr(fd);
103 char *host = client_name(fd);
105 if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
106 rprintf(FERROR,"rsync denied on module %s from %s (%s)\n",
107 lp_name(i), client_name(fd), client_addr(fd));
111 if (!claim_connection(lp_lock_file(), lp_max_connections())) {
112 rprintf(FERROR,"ERROR: max connections reached\n");
116 rprintf(FINFO,"rsync on module %s from %s (%s)\n",
117 lp_name(i), host, addr);
125 if (!name_to_uid(p, &uid)) {
127 rprintf(FERROR,"Invalid uid %s\n", p);
134 if (!name_to_gid(p, &gid)) {
136 rprintf(FERROR,"Invalid gid %s\n", p);
142 if (chroot(lp_path(i))) {
143 io_printf(fd,"@ERROR: chroot failed\n");
148 io_printf(fd,"@ERROR: chdir failed\n");
153 io_printf(fd,"@ERROR: setgid failed\n");
158 io_printf(fd,"@ERROR: setuid failed\n");
162 io_printf(fd,"@RSYNCD: OK\n");
164 argv[argc++] = "rsyncd";
167 if (!read_line(fd, line, sizeof(line)-1)) {
173 argv[argc] = strdup(line);
179 if (argc == MAX_ARGS) {
184 parse_arguments(argc, argv);
186 /* don't allow the logs to be flooded too fast */
187 if (verbose > 1) verbose = 1;
190 argp = argv + optind;
193 start_server(fd, fd, argc, argp);
198 /* send a list of available modules to the client. Don't list those
199 with "list = False". */
200 static void send_listing(int fd)
202 int n = lp_numservices();
207 io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
210 /* this is called when a socket connection is established to a client
211 and we want to start talking. The setup of the system is done from
213 static int start_daemon(int fd)
218 extern char *config_file;
219 extern int remote_version;
221 if (!lp_load(config_file)) {
225 set_socket_options(fd,"SO_KEEPALIVE");
227 io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
229 if (!read_line(fd, line, sizeof(line)-1)) {
233 if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
237 motd = lp_motd_file();
239 FILE *f = fopen(motd,"r");
240 while (f && !feof(f)) {
241 int len = fread(line, 1, sizeof(line)-1, f);
244 io_printf(fd,"%s", line);
254 if (!read_line(fd, line, sizeof(line)-1)) {
258 if (!*line || strcmp(line,"#list")==0) {
264 /* it's some sort of command that I don't understand */
265 io_printf(fd,"ERROR: Unknown command '%s'\n", line);
271 io_printf(fd,"ERROR: Unknown module '%s'\n", line);
276 return rsync_module(fd, i);
280 int daemon_main(void)
282 if (is_a_socket(STDIN_FILENO)) {
283 /* we are running via inetd */
284 return start_daemon(STDIN_FILENO);
289 start_accept_loop(rsync_port, start_daemon);