[rsync/rsync.git] / clientserver.c

/* 
   Copyright (C) Andrew Tridgell 1998
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/* the socket based protocol for setting up a connection wit rsyncd */

#include "rsync.h"

extern int module_id;
extern int read_only;
extern int verbose;
extern int rsync_port;
char *auth_user;
int sanitize_paths = 0;

int start_socket_client(char *host, char *path, int argc, char *argv[])
{
	int fd, i;
	char *sargs[MAX_ARGS];
	int sargc=0;
	char line[MAXPATHLEN];
	char *p, *user=NULL;
	extern int remote_version;
	extern int am_sender;
	extern struct in_addr socket_address;

	if (argc == 0 && !am_sender) {
		extern int list_only;
		list_only = 1;
	}

	if (*path == '/') {
		rprintf(FERROR,"ERROR: The remote path must start with a module name\n");
		return -1;
	}

	p = strchr(host, '@');
	if (p) {
		user = host;
		host = p+1;
		*p = 0;
	}

	if (!user) user = getenv("USER");
	if (!user) user = getenv("LOGNAME");

	fd = open_socket_out(host, rsync_port, &socket_address);
	if (fd == -1) {
		exit_cleanup(RERR_SOCKETIO);
	}
	
	server_options(sargs,&sargc);

	sargs[sargc++] = ".";

	if (path && *path) 
		sargs[sargc++] = path;

	sargs[sargc] = NULL;

	io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);

	if (!read_line(fd, line, sizeof(line)-1)) {
		return -1;
	}

	if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
		return -1;
	}

	p = strchr(path,'/');
	if (p) *p = 0;
	io_printf(fd,"%s\n",path);
	if (p) *p = '/';

	while (1) {
		if (!read_line(fd, line, sizeof(line)-1)) {
			return -1;
		}

		if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) {
			auth_client(fd, user, line+18);
			continue;
		}

		if (strcmp(line,"@RSYNCD: OK") == 0) break;
		rprintf(FINFO,"%s\n", line);
	}

	for (i=0;i<sargc;i++) {
		io_printf(fd,"%s\n", sargs[i]);
	}
	io_printf(fd,"\n");

	if (remote_version < 23) {
		if (remote_version == 22 || (remote_version > 17 && !am_sender))
			io_start_multiplex_in(fd);
	}

	return client_run(fd, fd, -1, argc, argv);
}


static int rsync_module(int fd, int i)
{
	int argc=0;
	char *argv[MAX_ARGS];
	char **argp;
	char line[MAXPATHLEN];
	uid_t uid = (uid_t)-2;
	gid_t gid = (gid_t)-2;
	char *p;
	char *addr = client_addr(fd);
	char *host = client_name(fd);
	char *name = lp_name(i);
	int use_chroot = lp_use_chroot(i);
	int start_glob=0;
	int ret;
	char *request=NULL;
	extern int am_sender;
	extern int remote_version;
	extern int am_root;

	if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
		rprintf(FERROR,"rsync denied on module %s from %s (%s)\n",
			name, client_name(fd), client_addr(fd));
		io_printf(fd,"@ERROR: access denied to %s from %s (%s)\n",
			  name, client_name(fd), client_addr(fd));
		return -1;
	}

	if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) {
		if (errno) {
			rprintf(FERROR,"failed to open lock file %s : %s\n",
				lp_lock_file(i), strerror(errno));
			io_printf(fd,"@ERROR: failed to open lock file %s : %s\n",
				  lp_lock_file(i), strerror(errno));
		} else {
			rprintf(FERROR,"max connections (%d) reached\n",
				lp_max_connections(i));
			io_printf(fd,"@ERROR: max connections (%d) reached - try again later\n", lp_max_connections(i));
		}
		return -1;
	}

	
	auth_user = auth_server(fd, i, addr, "@RSYNCD: AUTHREQD ");

	if (!auth_user) {
		rprintf(FERROR,"auth failed on module %s from %s (%s)\n",
			name, client_name(fd), client_addr(fd));
		io_printf(fd,"@ERROR: auth failed on module %s\n",name);
		return -1;		
	}

	module_id = i;

	am_root = (getuid() == 0);

	if (am_root) {
		p = lp_uid(i);
		if (!name_to_uid(p, &uid)) {
			if (!isdigit(*p)) {
				rprintf(FERROR,"Invalid uid %s\n", p);
				io_printf(fd,"@ERROR: invalid uid\n");
				return -1;
			} 
			uid = atoi(p);
		}

		p = lp_gid(i);
		if (!name_to_gid(p, &gid)) {
			if (!isdigit(*p)) {
				rprintf(FERROR,"Invalid gid %s\n", p);
				io_printf(fd,"@ERROR: invalid gid\n");
				return -1;
			} 
			gid = atoi(p);
		}
	}

	p = lp_include_from(i);
	add_exclude_file(p, 1, 1);

	p = lp_include(i);
	add_include_line(p);

	p = lp_exclude_from(i);
	add_exclude_file(p, 1, 0);

	p = lp_exclude(i);
	add_exclude_line(p);

	log_open();

	if (use_chroot) {
		if (chroot(lp_path(i))) {
			rprintf(FERROR,"chroot %s failed\n", lp_path(i));
			io_printf(fd,"@ERROR: chroot failed\n");
			return -1;
		}

		if (!push_dir("/", 0)) {
			rprintf(FERROR,"chdir %s failed\n", lp_path(i));
			io_printf(fd,"@ERROR: chdir failed\n");
			return -1;
		}

	} else {
		if (!push_dir(lp_path(i), 0)) {
			rprintf(FERROR,"chdir %s failed\n", lp_path(i));
			io_printf(fd,"@ERROR: chdir failed\n");
			return -1;
		}
		sanitize_paths = 1;
	}

	if (am_root) {
		if (setgid(gid)) {
			rprintf(FERROR,"setgid %d failed\n", gid);
			io_printf(fd,"@ERROR: setgid failed\n");
			return -1;
		}

		if (setuid(uid)) {
			rprintf(FERROR,"setuid %d failed\n", uid);
			io_printf(fd,"@ERROR: setuid failed\n");
			return -1;
		}

		am_root = (getuid() == 0);
	}

	io_printf(fd,"@RSYNCD: OK\n");

	argv[argc++] = "rsyncd";

	while (1) {
		if (!read_line(fd, line, sizeof(line)-1)) {
			return -1;
		}

		if (!*line) break;

		p = line;

		argv[argc] = strdup(p);
		if (!argv[argc]) {
			return -1;
		}

		if (start_glob) {
			if (start_glob == 1) {
				request = strdup(p);
				start_glob++;
			}
			glob_expand(name, argv, &argc, MAX_ARGS);
		} else {
			argc++;
		}

		if (strcmp(line,".") == 0) {
			start_glob = 1;
		}

		if (argc == MAX_ARGS) {
			return -1;
		}
	}

	if (sanitize_paths) {
		/*
		 * Note that this is applied to all parameters, whether or not
		 *    they are filenames, but no other legal parameters contain
		 *    the forms that need to be sanitized so it doesn't hurt;
		 *    it is not known at this point which parameters are files
		 *    and which aren't.
		 */
		for (i = 1; i < argc; i++) {
			sanitize_path(argv[i], NULL);
		}
	}

	ret = parse_arguments(argc, argv, 0);

	if (request) {
		if (*auth_user) {
			rprintf(FINFO,"rsync %s %s from %s@%s (%s)\n",
				am_sender?"on":"to",
				request, auth_user, host, addr);
		} else {
			rprintf(FINFO,"rsync %s %s from %s (%s)\n",
				am_sender?"on":"to",
				request, host, addr);
		}
		free(request);
	}

#if !TRIDGE
	/* don't allow the logs to be flooded too fast */
	if (verbose > 1) verbose = 1;
#endif

	argc -= optind;
	argp = argv + optind;
	optind = 0;

	if (remote_version < 23) {
		if (remote_version == 22 || (remote_version > 17 && am_sender))
			io_start_multiplex_out(fd);
	}

	if (!ret) {
		option_error();
	}

	if (lp_timeout(i)) {
		extern int io_timeout;
		io_timeout = lp_timeout(i);
	}

	start_server(fd, fd, argc, argp);

	return 0;
}

/* send a list of available modules to the client. Don't list those
   with "list = False". */
static void send_listing(int fd)
{
	int n = lp_numservices();
	int i;
	
	for (i=0;i<n;i++)
		if (lp_list(i))
		    io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
}

/* this is called when a socket connection is established to a client
   and we want to start talking. The setup of the system is done from
   here */
static int start_daemon(int fd)
{
	char line[200];
	char *motd;
	int i = -1;
	extern char *config_file;
	extern int remote_version;

	if (!lp_load(config_file, 0)) {
		exit_cleanup(RERR_SYNTAX);
	}

	set_socket_options(fd,"SO_KEEPALIVE");
	set_socket_options(fd,lp_socket_options());
	set_nonblocking(fd);

	io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);

	motd = lp_motd_file();
	if (motd && *motd) {
		FILE *f = fopen(motd,"r");
		while (f && !feof(f)) {
			int len = fread(line, 1, sizeof(line)-1, f);
			if (len > 0) {
				line[len] = 0;
				io_printf(fd,"%s", line);
			}
		}
		if (f) fclose(f);
		io_printf(fd,"\n");
	}

	if (!read_line(fd, line, sizeof(line)-1)) {
		return -1;
	}

	if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
		io_printf(fd,"@ERROR: protocol startup error\n");
		return -1;
	}	

	while (i == -1) {
		line[0] = 0;
		if (!read_line(fd, line, sizeof(line)-1)) {
			return -1;
		}

		if (!*line || strcmp(line,"#list")==0) {
			send_listing(fd);
			return -1;
		} 

		if (*line == '#') {
			/* it's some sort of command that I don't understand */
			io_printf(fd,"@ERROR: Unknown command '%s'\n", line);
			return -1;
		}

		i = lp_number(line);
		if (i == -1) {
			io_printf(fd,"@ERROR: Unknown module '%s'\n", line);
			return -1;
		}
	}

	return rsync_module(fd, i);
}


int daemon_main(void)
{
	extern char *config_file;
	extern int orig_umask;
	char *pid_file;

	if (is_a_socket(STDIN_FILENO)) {
		int i;

		/* we are running via inetd - close off stdout and
		   stderr so that library functions (and getopt) don't
		   try to use them. Redirect them to /dev/null */
		for (i=1;i<3;i++) {
			close(i); 
			open("/dev/null", O_RDWR);
		}

		return start_daemon(STDIN_FILENO);
	}

	become_daemon();

	if (!lp_load(config_file, 1)) {
		exit_cleanup(RERR_SYNTAX);
	}

	log_open();

	rprintf(FINFO,"rsyncd version %s starting\n",VERSION);

	if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) {
		char pidbuf[16];
		int fd;
		int pid = (int) getpid();
		cleanup_set_pid(pid);
		if ((fd = do_open(lp_pid_file(), O_WRONLY|O_CREAT|O_TRUNC,
					0666 & ~orig_umask)) == -1) {
		    cleanup_set_pid(0);
		    rprintf(FLOG,"failed to create pid file %s\n", pid_file);
		    exit_cleanup(RERR_FILEIO);
		}
		slprintf(pidbuf, sizeof(pidbuf), "%d\n", pid);
		write(fd, pidbuf, strlen(pidbuf));
		close(fd);
	}

	start_accept_loop(rsync_port, start_daemon);
	return -1;
}
Commit	Line	Data
3591c066 AT	1	/*
	2	Copyright (C) Andrew Tridgell 1998
	3
	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.
	8
	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.
	13
	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.
	17	*/
	18
	19	/* the socket based protocol for setting up a connection wit rsyncd */
	20
	21	#include "rsync.h"
	22
	23	extern int module_id;
	24	extern int read_only;
	25	extern int verbose;
	26	extern int rsync_port;
97cb8dc2	27	char *auth_user;
cb13abfe	28	int sanitize_paths = 0;
3591c066 AT	29
	30	int start_socket_client(char host, char path, int argc, char *argv[])
	31	{
	32	int fd, i;
	33	char *sargs[MAX_ARGS];
	34	int sargc=0;
e42c9458	35	char line[MAXPATHLEN];
bcb7e502	36	char p, user=NULL;
13c5fc0e	37	extern int remote_version;
8d9dc9f9	38	extern int am_sender;
e30f0657	39	extern struct in_addr socket_address;
3591c066	40
27e3e9c9 AT	41	if (argc == 0 && !am_sender) {
	42	extern int list_only;
	43	list_only = 1;
	44	}
	45
f98df1d9 AT	46	if (*path == '/') {
	47	rprintf(FERROR,"ERROR: The remote path must start with a module name\n");
	48	return -1;
	49	}
	50
bcb7e502 AT	51	p = strchr(host, '@');
	52	if (p) {
	53	user = host;
	54	host = p+1;
	55	*p = 0;
	56	}
	57
	58	if (!user) user = getenv("USER");
	59	if (!user) user = getenv("LOGNAME");
	60
e30f0657	61	fd = open_socket_out(host, rsync_port, &socket_address);
3591c066	62	if (fd == -1) {
65417579	63	exit_cleanup(RERR_SOCKETIO);
3591c066 AT	64	}
	65
	66	server_options(sargs,&sargc);
	67
	68	sargs[sargc++] = ".";
	69
	70	if (path && *path)
	71	sargs[sargc++] = path;
	72
	73	sargs[sargc] = NULL;
	74
91eee594 AT	75	io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
91eee594 AT	76
3591c066 AT	77	if (!read_line(fd, line, sizeof(line)-1)) {
	78	return -1;
	79	}
	80
13c5fc0e	81	if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
3591c066 AT	82	return -1;
	83	}
	84
2c91d3d3 AT	85	p = strchr(path,'/');
	86	if (p) *p = 0;
	87	io_printf(fd,"%s\n",path);
	88	if (p) *p = '/';
	89
3591c066 AT	90	while (1) {
	91	if (!read_line(fd, line, sizeof(line)-1)) {
	92	return -1;
	93	}
31593dd6	94
31593dd6	95	if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) {
bcb7e502	96	auth_client(fd, user, line+18);
31593dd6 AT	97	continue;
31593dd6 AT	98	}
31593dd6	99
3591c066 AT	100	if (strcmp(line,"@RSYNCD: OK") == 0) break;
	101	rprintf(FINFO,"%s\n", line);
	102	}
	103
	104	for (i=0;i<sargc;i++) {
	105	io_printf(fd,"%s\n", sargs[i]);
	106	}
	107	io_printf(fd,"\n");
	108
09b7f5db AT	109	if (remote_version < 23) {
	110	if (remote_version == 22 \|\| (remote_version > 17 && !am_sender))
	111	io_start_multiplex_in(fd);
	112	}
8d9dc9f9	113
3591c066 AT	114	return client_run(fd, fd, -1, argc, argv);
	115	}
	116
	117
	118
	119	static int rsync_module(int fd, int i)
	120	{
	121	int argc=0;
	122	char *argv[MAX_ARGS];
	123	char **argp;
e42c9458	124	char line[MAXPATHLEN];
1a016bfd AT	125	uid_t uid = (uid_t)-2;
1a016bfd AT	126	gid_t gid = (gid_t)-2;
8ef4ffd6	127	char *p;
56c473b7 AT	128	char *addr = client_addr(fd);
56c473b7 AT	129	char *host = client_name(fd);
874895d5	130	char *name = lp_name(i);
8638dd48	131	int use_chroot = lp_use_chroot(i);
874895d5	132	int start_glob=0;
41979ff8	133	int ret;
7b372642 AT	134	char *request=NULL;
7b372642 AT	135	extern int am_sender;
8d9dc9f9	136	extern int remote_version;
943882a2	137	extern int am_root;
56c473b7 AT	138
	139	if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
	140	rprintf(FERROR,"rsync denied on module %s from %s (%s)\n",
874895d5	141	name, client_name(fd), client_addr(fd));
c8e78d87	142	io_printf(fd,"@ERROR: access denied to %s from %s (%s)\n",
874895d5	143	name, client_name(fd), client_addr(fd));
56c473b7 AT	144	return -1;
56c473b7 AT	145	}
3591c066	146
5e71c444	147	if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) {
8d72ef6e AT	148	if (errno) {
8d72ef6e AT	149	rprintf(FERROR,"failed to open lock file %s : %s\n",
5e71c444	150	lp_lock_file(i), strerror(errno));
8d72ef6e	151	io_printf(fd,"@ERROR: failed to open lock file %s : %s\n",
5e71c444	152	lp_lock_file(i), strerror(errno));
8d72ef6e AT	153	} else {
8d72ef6e AT	154	rprintf(FERROR,"max connections (%d) reached\n",
5e71c444 AT	155	lp_max_connections(i));
5e71c444 AT	156	io_printf(fd,"@ERROR: max connections (%d) reached - try again later\n", lp_max_connections(i));
8d72ef6e	157	}
0c515f17 AT	158	return -1;
	159	}
	160
31593dd6	161
97cb8dc2	162	auth_user = auth_server(fd, i, addr, "@RSYNCD: AUTHREQD ");
d0d56395	163
97cb8dc2	164	if (!auth_user) {
d0d56395 AT	165	rprintf(FERROR,"auth failed on module %s from %s (%s)\n",
	166	name, client_name(fd), client_addr(fd));
	167	io_printf(fd,"@ERROR: auth failed on module %s\n",name);
	168	return -1;
	169	}
	170
3591c066 AT	171	module_id = i;
3591c066 AT	172
716baed7	173	am_root = (getuid() == 0);
8ef4ffd6	174
716baed7 DD	175	if (am_root) {
	176	p = lp_uid(i);
	177	if (!name_to_uid(p, &uid)) {
	178	if (!isdigit(*p)) {
	179	rprintf(FERROR,"Invalid uid %s\n", p);
	180	io_printf(fd,"@ERROR: invalid uid\n");
	181	return -1;
	182	}
	183	uid = atoi(p);
	184	}
	185
	186	p = lp_gid(i);
	187	if (!name_to_gid(p, &gid)) {
	188	if (!isdigit(*p)) {
	189	rprintf(FERROR,"Invalid gid %s\n", p);
	190	io_printf(fd,"@ERROR: invalid gid\n");
	191	return -1;
	192	}
	193	gid = atoi(p);
	194	}
8ef4ffd6 AT	195	}
8ef4ffd6 AT	196
cd64343a DD	197	p = lp_include_from(i);
	198	add_exclude_file(p, 1, 1);
	199
	200	p = lp_include(i);
	201	add_include_line(p);
	202
8f3a2d54	203	p = lp_exclude_from(i);
2b6b4d53	204	add_exclude_file(p, 1, 0);
8f3a2d54	205
5805327b	206	p = lp_exclude(i);
8f3a2d54 AT	207	add_exclude_line(p);
8f3a2d54 AT	208
1a016bfd AT	209	log_open();
1a016bfd AT	210
8638dd48 DD	211	if (use_chroot) {
	212	if (chroot(lp_path(i))) {
	213	rprintf(FERROR,"chroot %s failed\n", lp_path(i));
	214	io_printf(fd,"@ERROR: chroot failed\n");
	215	return -1;
	216	}
3591c066	217
c226b7c2	218	if (!push_dir("/", 0)) {
8638dd48 DD	219	rprintf(FERROR,"chdir %s failed\n", lp_path(i));
	220	io_printf(fd,"@ERROR: chdir failed\n");
	221	return -1;
	222	}
3591c066	223
716baed7 DD	224	} else {
	225	if (!push_dir(lp_path(i), 0)) {
	226	rprintf(FERROR,"chdir %s failed\n", lp_path(i));
	227	io_printf(fd,"@ERROR: chdir failed\n");
	228	return -1;
	229	}
cb13abfe	230	sanitize_paths = 1;
716baed7 DD	231	}
	232
	233	if (am_root) {
	234	if (setgid(gid)) {
8638dd48 DD	235	rprintf(FERROR,"setgid %d failed\n", gid);
	236	io_printf(fd,"@ERROR: setgid failed\n");
	237	return -1;
	238	}
3591c066	239
716baed7	240	if (setuid(uid)) {
8638dd48 DD	241	rprintf(FERROR,"setuid %d failed\n", uid);
	242	io_printf(fd,"@ERROR: setuid failed\n");
	243	return -1;
	244	}
	245
716baed7	246	am_root = (getuid() == 0);
3591c066 AT	247	}
	248
	249	io_printf(fd,"@RSYNCD: OK\n");
	250
	251	argv[argc++] = "rsyncd";
	252
	253	while (1) {
	254	if (!read_line(fd, line, sizeof(line)-1)) {
	255	return -1;
	256	}
	257
	258	if (!*line) break;
	259
874895d5 AT	260	p = line;
874895d5 AT	261
874895d5	262	argv[argc] = strdup(p);
3591c066 AT	263	if (!argv[argc]) {
	264	return -1;
	265	}
	266
874895d5	267	if (start_glob) {
1a016bfd	268	if (start_glob == 1) {
7b372642	269	request = strdup(p);
1a016bfd AT	270	start_glob++;
1a016bfd AT	271	}
cb13abfe	272	glob_expand(name, argv, &argc, MAX_ARGS);
874895d5 AT	273	} else {
	274	argc++;
	275	}
	276
	277	if (strcmp(line,".") == 0) {
	278	start_glob = 1;
	279	}
	280
3591c066 AT	281	if (argc == MAX_ARGS) {
	282	return -1;
	283	}
	284	}
	285
cb13abfe	286	if (sanitize_paths) {
8638dd48 DD	287	/*
	288	* Note that this is applied to all parameters, whether or not
	289	* they are filenames, but no other legal parameters contain
	290	* the forms that need to be sanitized so it doesn't hurt;
	291	* it is not known at this point which parameters are files
	292	* and which aren't.
	293	*/
	294	for (i = 1; i < argc; i++) {
cb13abfe	295	sanitize_path(argv[i], NULL);
8638dd48 DD	296	}
	297	}
	298
b86f0cef	299	ret = parse_arguments(argc, argv, 0);
3591c066	300
7b372642	301	if (request) {
97cb8dc2	302	if (*auth_user) {
d0d56395 AT	303	rprintf(FINFO,"rsync %s %s from %s@%s (%s)\n",
d0d56395 AT	304	am_sender?"on":"to",
97cb8dc2	305	request, auth_user, host, addr);
d0d56395 AT	306	} else {
	307	rprintf(FINFO,"rsync %s %s from %s (%s)\n",
	308	am_sender?"on":"to",
	309	request, host, addr);
	310	}
7b372642 AT	311	free(request);
	312	}
	313
0199b05f	314	#if !TRIDGE
3591c066 AT	315	/* don't allow the logs to be flooded too fast */
3591c066 AT	316	if (verbose > 1) verbose = 1;
0199b05f	317	#endif
3591c066 AT	318
	319	argc -= optind;
	320	argp = argv + optind;
	321	optind = 0;
	322
09b7f5db AT	323	if (remote_version < 23) {
	324	if (remote_version == 22 \|\| (remote_version > 17 && am_sender))
	325	io_start_multiplex_out(fd);
554e0a8d AT	326	}
554e0a8d AT	327
41979ff8	328	if (!ret) {
cd8185f2	329	option_error();
41979ff8 AT	330	}
41979ff8 AT	331
81791cfc AT	332	if (lp_timeout(i)) {
	333	extern int io_timeout;
	334	io_timeout = lp_timeout(i);
	335	}
	336
3591c066 AT	337	start_server(fd, fd, argc, argp);
	338
	339	return 0;
	340	}
	341
7a6421fa AT	342	/* send a list of available modules to the client. Don't list those
7a6421fa AT	343	with "list = False". */
3591c066 AT	344	static void send_listing(int fd)
	345	{
	346	int n = lp_numservices();
	347	int i;
	348
	349	for (i=0;i<n;i++)
	350	if (lp_list(i))
	351	io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
	352	}
	353
	354	/* this is called when a socket connection is established to a client
	355	and we want to start talking. The setup of the system is done from
	356	here */
	357	static int start_daemon(int fd)
	358	{
7a6421fa	359	char line[200];
3591c066	360	char *motd;
8ef4ffd6	361	int i = -1;
4cdf25e4	362	extern char *config_file;
13c5fc0e	363	extern int remote_version;
4cdf25e4	364
f9e940ef	365	if (!lp_load(config_file, 0)) {
65417579	366	exit_cleanup(RERR_SYNTAX);
4cdf25e4	367	}
3591c066 AT	368
3591c066 AT	369	set_socket_options(fd,"SO_KEEPALIVE");
a6801c39	370	set_socket_options(fd,lp_socket_options());
f0359dd0	371	set_nonblocking(fd);
3591c066 AT	372
	373	io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
	374
	375	motd = lp_motd_file();
27d3cdbc	376	if (motd && *motd) {
3591c066 AT	377	FILE *f = fopen(motd,"r");
	378	while (f && !feof(f)) {
	379	int len = fread(line, 1, sizeof(line)-1, f);
	380	if (len > 0) {
	381	line[len] = 0;
	382	io_printf(fd,"%s", line);
	383	}
	384	}
	385	if (f) fclose(f);
	386	io_printf(fd,"\n");
	387	}
	388
91eee594 AT	389	if (!read_line(fd, line, sizeof(line)-1)) {
	390	return -1;
	391	}
	392
	393	if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
c8e78d87	394	io_printf(fd,"@ERROR: protocol startup error\n");
91eee594 AT	395	return -1;
	396	}
	397
8ef4ffd6	398	while (i == -1) {
3591c066 AT	399	line[0] = 0;
	400	if (!read_line(fd, line, sizeof(line)-1)) {
	401	return -1;
	402	}
	403
	404	if (!*line \|\| strcmp(line,"#list")==0) {
	405	send_listing(fd);
	406	return -1;
	407	}
	408
	409	if (*line == '#') {
	410	/* it's some sort of command that I don't understand */
c8e78d87	411	io_printf(fd,"@ERROR: Unknown command '%s'\n", line);
3591c066 AT	412	return -1;
	413	}
	414
	415	i = lp_number(line);
	416	if (i == -1) {
c8e78d87	417	io_printf(fd,"@ERROR: Unknown module '%s'\n", line);
3591c066 AT	418	return -1;
3591c066 AT	419	}
3591c066 AT	420	}
3591c066 AT	421
8ef4ffd6	422	return rsync_module(fd, i);
3591c066 AT	423	}
	424
	425
	426	int daemon_main(void)
	427	{
f9e940ef	428	extern char *config_file;
ad517ce5	429	extern int orig_umask;
8638dd48	430	char *pid_file;
1a016bfd	431
3591c066	432	if (is_a_socket(STDIN_FILENO)) {
41979ff8 AT	433	int i;
	434
	435	/* we are running via inetd - close off stdout and
	436	stderr so that library functions (and getopt) don't
	437	try to use them. Redirect them to /dev/null */
	438	for (i=1;i<3;i++) {
	439	close(i);
	440	open("/dev/null", O_RDWR);
	441	}
3eb38818	442
3591c066 AT	443	return start_daemon(STDIN_FILENO);
	444	}
	445
	446	become_daemon();
	447
f9e940ef	448	if (!lp_load(config_file, 1)) {
65417579	449	exit_cleanup(RERR_SYNTAX);
f9e940ef AT	450	}
	451
	452	log_open();
	453
e42c9458 AT	454	rprintf(FINFO,"rsyncd version %s starting\n",VERSION);
e42c9458 AT	455
8638dd48	456	if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) {
ad517ce5 DD	457	char pidbuf[16];
ad517ce5 DD	458	int fd;
8638dd48 DD	459	int pid = (int) getpid();
8638dd48 DD	460	cleanup_set_pid(pid);
ad517ce5 DD	461	if ((fd = do_open(lp_pid_file(), O_WRONLY\|O_CREAT\|O_TRUNC,
ad517ce5 DD	462	0666 & ~orig_umask)) == -1) {
8638dd48	463	cleanup_set_pid(0);
8a5d6bba	464	rprintf(FLOG,"failed to create pid file %s\n", pid_file);
65417579	465	exit_cleanup(RERR_FILEIO);
8638dd48	466	}
ad517ce5 DD	467	slprintf(pidbuf, sizeof(pidbuf), "%d\n", pid);
	468	write(fd, pidbuf, strlen(pidbuf));
	469	close(fd);
8638dd48 DD	470	}
8638dd48 DD	471
8ef4ffd6 AT	472	start_accept_loop(rsync_port, start_daemon);
8ef4ffd6 AT	473	return -1;
3591c066 AT	474	}
3591c066 AT	475