[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 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;

	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);
	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 > 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;

	if (lp_read_only(i))
		read_only = 1;

	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;
		}
	}

	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, !use_chroot);
		} else {
			argc++;
		}

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

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

	if (!use_chroot) {
		/*
		 * 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]);
		}
	}

	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 > 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());
	

	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;
	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);
		}

		set_nonblocking(STDIN_FILENO);

		return start_daemon(STDIN_FILENO);
	}

	become_daemon();

	if (!lp_load(config_file, 1)) {
		fprintf(stderr,"failed to load config file %s\n", config_file);
		exit_cleanup(RERR_SYNTAX);
	}

	log_open();

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

	if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) {
		FILE *f;
		int pid = (int) getpid();
		cleanup_set_pid(pid);
		if ((f = fopen(lp_pid_file(), "w")) == NULL) {
		    cleanup_set_pid(0);
		    fprintf(stderr,"failed to create pid file %s\n", pid_file);
		    exit_cleanup(RERR_FILEIO);
		}
		fprintf(f, "%d\n", pid);
		fclose(f);
	}

	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;
3591c066 AT	28
	29	int start_socket_client(char host, char path, int argc, char *argv[])
	30	{
	31	int fd, i;
	32	char *sargs[MAX_ARGS];
	33	int sargc=0;
e42c9458	34	char line[MAXPATHLEN];
bcb7e502	35	char p, user=NULL;
13c5fc0e	36	extern int remote_version;
8d9dc9f9	37	extern int am_sender;
3591c066	38
f98df1d9 AT	39	if (*path == '/') {
	40	rprintf(FERROR,"ERROR: The remote path must start with a module name\n");
	41	return -1;
	42	}
	43
bcb7e502 AT	44	p = strchr(host, '@');
	45	if (p) {
	46	user = host;
	47	host = p+1;
	48	*p = 0;
	49	}
	50
	51	if (!user) user = getenv("USER");
	52	if (!user) user = getenv("LOGNAME");
	53
3591c066 AT	54	fd = open_socket_out(host, rsync_port);
3591c066 AT	55	if (fd == -1) {
65417579	56	exit_cleanup(RERR_SOCKETIO);
3591c066 AT	57	}
	58
	59	server_options(sargs,&sargc);
	60
	61	sargs[sargc++] = ".";
	62
	63	if (path && *path)
	64	sargs[sargc++] = path;
	65
	66	sargs[sargc] = NULL;
	67
91eee594 AT	68	io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
91eee594 AT	69
3591c066 AT	70	if (!read_line(fd, line, sizeof(line)-1)) {
	71	return -1;
	72	}
	73
13c5fc0e	74	if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
3591c066 AT	75	return -1;
	76	}
	77
2c91d3d3 AT	78	p = strchr(path,'/');
	79	if (p) *p = 0;
	80	io_printf(fd,"%s\n",path);
	81	if (p) *p = '/';
	82
3591c066 AT	83	while (1) {
	84	if (!read_line(fd, line, sizeof(line)-1)) {
	85	return -1;
	86	}
31593dd6	87
31593dd6	88	if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) {
bcb7e502	89	auth_client(fd, user, line+18);
31593dd6 AT	90	continue;
31593dd6 AT	91	}
31593dd6	92
3591c066 AT	93	if (strcmp(line,"@RSYNCD: OK") == 0) break;
	94	rprintf(FINFO,"%s\n", line);
	95	}
	96
	97	for (i=0;i<sargc;i++) {
	98	io_printf(fd,"%s\n", sargs[i]);
	99	}
	100	io_printf(fd,"\n");
	101
8d9dc9f9 AT	102	if (remote_version > 17 && !am_sender)
	103	io_start_multiplex_in(fd);
	104
3591c066 AT	105	return client_run(fd, fd, -1, argc, argv);
	106	}
	107
	108
	109
	110	static int rsync_module(int fd, int i)
	111	{
	112	int argc=0;
	113	char *argv[MAX_ARGS];
	114	char **argp;
e42c9458	115	char line[MAXPATHLEN];
1a016bfd AT	116	uid_t uid = (uid_t)-2;
1a016bfd AT	117	gid_t gid = (gid_t)-2;
8ef4ffd6	118	char *p;
56c473b7 AT	119	char *addr = client_addr(fd);
56c473b7 AT	120	char *host = client_name(fd);
874895d5	121	char *name = lp_name(i);
8638dd48	122	int use_chroot = lp_use_chroot(i);
874895d5	123	int start_glob=0;
41979ff8	124	int ret;
7b372642 AT	125	char *request=NULL;
7b372642 AT	126	extern int am_sender;
8d9dc9f9	127	extern int remote_version;
943882a2	128	extern int am_root;
56c473b7 AT	129
	130	if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
	131	rprintf(FERROR,"rsync denied on module %s from %s (%s)\n",
874895d5	132	name, client_name(fd), client_addr(fd));
c8e78d87	133	io_printf(fd,"@ERROR: access denied to %s from %s (%s)\n",
874895d5	134	name, client_name(fd), client_addr(fd));
56c473b7 AT	135	return -1;
56c473b7 AT	136	}
3591c066	137
5e71c444	138	if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) {
8d72ef6e AT	139	if (errno) {
8d72ef6e AT	140	rprintf(FERROR,"failed to open lock file %s : %s\n",
5e71c444	141	lp_lock_file(i), strerror(errno));
8d72ef6e	142	io_printf(fd,"@ERROR: failed to open lock file %s : %s\n",
5e71c444	143	lp_lock_file(i), strerror(errno));
8d72ef6e AT	144	} else {
8d72ef6e AT	145	rprintf(FERROR,"max connections (%d) reached\n",
5e71c444 AT	146	lp_max_connections(i));
5e71c444 AT	147	io_printf(fd,"@ERROR: max connections (%d) reached - try again later\n", lp_max_connections(i));
8d72ef6e	148	}
0c515f17 AT	149	return -1;
	150	}
	151
31593dd6	152
97cb8dc2	153	auth_user = auth_server(fd, i, addr, "@RSYNCD: AUTHREQD ");
d0d56395	154
97cb8dc2	155	if (!auth_user) {
d0d56395 AT	156	rprintf(FERROR,"auth failed on module %s from %s (%s)\n",
	157	name, client_name(fd), client_addr(fd));
	158	io_printf(fd,"@ERROR: auth failed on module %s\n",name);
	159	return -1;
	160	}
	161
3591c066 AT	162	module_id = i;
	163
	164	if (lp_read_only(i))
	165	read_only = 1;
	166
716baed7	167	am_root = (getuid() == 0);
8ef4ffd6	168
716baed7 DD	169	if (am_root) {
	170	p = lp_uid(i);
	171	if (!name_to_uid(p, &uid)) {
	172	if (!isdigit(*p)) {
	173	rprintf(FERROR,"Invalid uid %s\n", p);
	174	io_printf(fd,"@ERROR: invalid uid\n");
	175	return -1;
	176	}
	177	uid = atoi(p);
	178	}
	179
	180	p = lp_gid(i);
	181	if (!name_to_gid(p, &gid)) {
	182	if (!isdigit(*p)) {
	183	rprintf(FERROR,"Invalid gid %s\n", p);
	184	io_printf(fd,"@ERROR: invalid gid\n");
	185	return -1;
	186	}
	187	gid = atoi(p);
	188	}
8ef4ffd6 AT	189	}
8ef4ffd6 AT	190
cd64343a DD	191	p = lp_include_from(i);
	192	add_exclude_file(p, 1, 1);
	193
	194	p = lp_include(i);
	195	add_include_line(p);
	196
8f3a2d54	197	p = lp_exclude_from(i);
2b6b4d53	198	add_exclude_file(p, 1, 0);
8f3a2d54	199
5805327b	200	p = lp_exclude(i);
8f3a2d54 AT	201	add_exclude_line(p);
8f3a2d54 AT	202
1a016bfd AT	203	log_open();
1a016bfd AT	204
8638dd48 DD	205	if (use_chroot) {
	206	if (chroot(lp_path(i))) {
	207	rprintf(FERROR,"chroot %s failed\n", lp_path(i));
	208	io_printf(fd,"@ERROR: chroot failed\n");
	209	return -1;
	210	}
3591c066	211
c226b7c2	212	if (!push_dir("/", 0)) {
8638dd48 DD	213	rprintf(FERROR,"chdir %s failed\n", lp_path(i));
	214	io_printf(fd,"@ERROR: chdir failed\n");
	215	return -1;
	216	}
3591c066	217
716baed7 DD	218	} else {
	219	if (!push_dir(lp_path(i), 0)) {
	220	rprintf(FERROR,"chdir %s failed\n", lp_path(i));
	221	io_printf(fd,"@ERROR: chdir failed\n");
	222	return -1;
	223	}
	224	}
	225
	226	if (am_root) {
	227	if (setgid(gid)) {
8638dd48 DD	228	rprintf(FERROR,"setgid %d failed\n", gid);
	229	io_printf(fd,"@ERROR: setgid failed\n");
	230	return -1;
	231	}
3591c066	232
716baed7	233	if (setuid(uid)) {
8638dd48 DD	234	rprintf(FERROR,"setuid %d failed\n", uid);
	235	io_printf(fd,"@ERROR: setuid failed\n");
	236	return -1;
	237	}
	238
716baed7	239	am_root = (getuid() == 0);
3591c066 AT	240	}
	241
	242	io_printf(fd,"@RSYNCD: OK\n");
	243
	244	argv[argc++] = "rsyncd";
	245
	246	while (1) {
	247	if (!read_line(fd, line, sizeof(line)-1)) {
	248	return -1;
	249	}
	250
	251	if (!*line) break;
	252
874895d5 AT	253	p = line;
874895d5 AT	254
874895d5	255	argv[argc] = strdup(p);
3591c066 AT	256	if (!argv[argc]) {
	257	return -1;
	258	}
	259
874895d5	260	if (start_glob) {
1a016bfd	261	if (start_glob == 1) {
7b372642	262	request = strdup(p);
1a016bfd AT	263	start_glob++;
1a016bfd AT	264	}
b389939f	265	glob_expand(name, argv, &argc, MAX_ARGS, !use_chroot);
874895d5 AT	266	} else {
	267	argc++;
	268	}
	269
	270	if (strcmp(line,".") == 0) {
	271	start_glob = 1;
	272	}
	273
3591c066 AT	274	if (argc == MAX_ARGS) {
	275	return -1;
	276	}
	277	}
	278
8638dd48 DD	279	if (!use_chroot) {
	280	/*
	281	* Note that this is applied to all parameters, whether or not
	282	* they are filenames, but no other legal parameters contain
	283	* the forms that need to be sanitized so it doesn't hurt;
	284	* it is not known at this point which parameters are files
	285	* and which aren't.
	286	*/
	287	for (i = 1; i < argc; i++) {
44e2e578	288	sanitize_path(argv[i]);
8638dd48 DD	289	}
	290	}
	291
b86f0cef	292	ret = parse_arguments(argc, argv, 0);
3591c066	293
7b372642	294	if (request) {
97cb8dc2	295	if (*auth_user) {
d0d56395 AT	296	rprintf(FINFO,"rsync %s %s from %s@%s (%s)\n",
d0d56395 AT	297	am_sender?"on":"to",
97cb8dc2	298	request, auth_user, host, addr);
d0d56395 AT	299	} else {
	300	rprintf(FINFO,"rsync %s %s from %s (%s)\n",
	301	am_sender?"on":"to",
	302	request, host, addr);
	303	}
7b372642 AT	304	free(request);
	305	}
	306
0199b05f	307	#if !TRIDGE
3591c066 AT	308	/* don't allow the logs to be flooded too fast */
3591c066 AT	309	if (verbose > 1) verbose = 1;
0199b05f	310	#endif
3591c066 AT	311
	312	argc -= optind;
	313	argp = argv + optind;
	314	optind = 0;
	315
8d9dc9f9 AT	316	if (remote_version > 17 && am_sender)
	317	io_start_multiplex_out(fd);
	318
41979ff8	319	if (!ret) {
cd8185f2	320	option_error();
41979ff8 AT	321	}
41979ff8 AT	322
81791cfc AT	323	if (lp_timeout(i)) {
	324	extern int io_timeout;
	325	io_timeout = lp_timeout(i);
	326	}
	327
3591c066 AT	328	start_server(fd, fd, argc, argp);
	329
	330	return 0;
	331	}
	332
7a6421fa AT	333	/* send a list of available modules to the client. Don't list those
7a6421fa AT	334	with "list = False". */
3591c066 AT	335	static void send_listing(int fd)
	336	{
	337	int n = lp_numservices();
	338	int i;
	339
	340	for (i=0;i<n;i++)
	341	if (lp_list(i))
	342	io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
	343	}
	344
	345	/* this is called when a socket connection is established to a client
	346	and we want to start talking. The setup of the system is done from
	347	here */
	348	static int start_daemon(int fd)
	349	{
7a6421fa	350	char line[200];
3591c066	351	char *motd;
8ef4ffd6	352	int i = -1;
4cdf25e4	353	extern char *config_file;
13c5fc0e	354	extern int remote_version;
4cdf25e4	355
f9e940ef	356	if (!lp_load(config_file, 0)) {
65417579	357	exit_cleanup(RERR_SYNTAX);
4cdf25e4	358	}
3591c066 AT	359
3591c066 AT	360	set_socket_options(fd,"SO_KEEPALIVE");
a6801c39 AT	361	set_socket_options(fd,lp_socket_options());
a6801c39 AT	362
3591c066 AT	363
	364	io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
	365
	366	motd = lp_motd_file();
27d3cdbc	367	if (motd && *motd) {
3591c066 AT	368	FILE *f = fopen(motd,"r");
	369	while (f && !feof(f)) {
	370	int len = fread(line, 1, sizeof(line)-1, f);
	371	if (len > 0) {
	372	line[len] = 0;
	373	io_printf(fd,"%s", line);
	374	}
	375	}
	376	if (f) fclose(f);
	377	io_printf(fd,"\n");
	378	}
	379
91eee594 AT	380	if (!read_line(fd, line, sizeof(line)-1)) {
	381	return -1;
	382	}
	383
	384	if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
c8e78d87	385	io_printf(fd,"@ERROR: protocol startup error\n");
91eee594 AT	386	return -1;
	387	}
	388
8ef4ffd6	389	while (i == -1) {
3591c066 AT	390	line[0] = 0;
	391	if (!read_line(fd, line, sizeof(line)-1)) {
	392	return -1;
	393	}
	394
	395	if (!*line \|\| strcmp(line,"#list")==0) {
	396	send_listing(fd);
	397	return -1;
	398	}
	399
	400	if (*line == '#') {
	401	/* it's some sort of command that I don't understand */
c8e78d87	402	io_printf(fd,"@ERROR: Unknown command '%s'\n", line);
3591c066 AT	403	return -1;
	404	}
	405
	406	i = lp_number(line);
	407	if (i == -1) {
c8e78d87	408	io_printf(fd,"@ERROR: Unknown module '%s'\n", line);
3591c066 AT	409	return -1;
3591c066 AT	410	}
3591c066 AT	411	}
3591c066 AT	412
8ef4ffd6	413	return rsync_module(fd, i);
3591c066 AT	414	}
	415
	416
	417	int daemon_main(void)
	418	{
f9e940ef	419	extern char *config_file;
8638dd48	420	char *pid_file;
1a016bfd	421
3591c066	422	if (is_a_socket(STDIN_FILENO)) {
41979ff8 AT	423	int i;
	424
	425	/* we are running via inetd - close off stdout and
	426	stderr so that library functions (and getopt) don't
	427	try to use them. Redirect them to /dev/null */
	428	for (i=1;i<3;i++) {
	429	close(i);
	430	open("/dev/null", O_RDWR);
	431	}
3eb38818 AT	432
	433	set_nonblocking(STDIN_FILENO);
	434
3591c066 AT	435	return start_daemon(STDIN_FILENO);
	436	}
	437
	438	become_daemon();
	439
f9e940ef AT	440	if (!lp_load(config_file, 1)) {
f9e940ef AT	441	fprintf(stderr,"failed to load config file %s\n", config_file);
65417579	442	exit_cleanup(RERR_SYNTAX);
f9e940ef AT	443	}
	444
	445	log_open();
	446
e42c9458 AT	447	rprintf(FINFO,"rsyncd version %s starting\n",VERSION);
e42c9458 AT	448
8638dd48 DD	449	if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) {
	450	FILE *f;
	451	int pid = (int) getpid();
	452	cleanup_set_pid(pid);
	453	if ((f = fopen(lp_pid_file(), "w")) == NULL) {
	454	cleanup_set_pid(0);
	455	fprintf(stderr,"failed to create pid file %s\n", pid_file);
65417579	456	exit_cleanup(RERR_FILEIO);
8638dd48 DD	457	}
	458	fprintf(f, "%d\n", pid);
	459	fclose(f);
	460	}
	461
8ef4ffd6 AT	462	start_accept_loop(rsync_port, start_daemon);
8ef4ffd6 AT	463	return -1;
3591c066 AT	464	}
3591c066 AT	465