Style(9) cleanup to src/sys/vfs, stage 2/21: deadfs.
[dragonfly.git] / usr.sbin / ypserv / yp_main.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1995
3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
1de703da
MD
31 *
32 * $FreeBSD: src/usr.sbin/ypserv/yp_main.c,v 1.21.2.3 2002/02/15 00:47:00 des Exp $
33 * $DragonFly: src/usr.sbin/ypserv/yp_main.c,v 1.2 2003/06/17 04:30:04 dillon Exp $
984263bc
MD
34 */
35
984263bc
MD
36/*
37 * ypserv startup function.
38 * We need out own main() since we have to do some additional work
39 * that rpcgen won't do for us. Most of this file was generated using
40 * rpcgen.new, and later modified.
41 */
42
43#include "yp.h"
44#include <err.h>
45#include <errno.h>
46#include <memory.h>
47#include <stdio.h>
48#include <signal.h>
49#include <stdlib.h> /* getenv, exit */
50#include <string.h> /* strcmp */
51#include <syslog.h>
52#include <unistd.h>
53#include <rpc/pmap_clnt.h> /* for pmap_unset */
54#ifdef __cplusplus
55#include <sysent.h> /* getdtablesize, open */
56#endif /* __cplusplus */
57#include <sys/socket.h>
58#include <netinet/in.h>
59#include <sys/wait.h>
60#include "yp_extern.h"
61#include <rpc/rpc.h>
62
63#ifndef SIG_PF
64#define SIG_PF void(*)(int)
65#endif
66
67#define _RPCSVC_CLOSEDOWN 120
68int _rpcpmstart; /* Started by a port monitor ? */
69static int _rpcfdtype;
70 /* Whether Stream or Datagram ? */
71 /* States a server can be in wrt request */
72
73#define _IDLE 0
74#define _SERVED 1
75#define _SERVING 2
76
77extern void ypprog_1(struct svc_req *, register SVCXPRT *);
78extern void ypprog_2(struct svc_req *, register SVCXPRT *);
79extern int _rpc_dtablesize(void);
80extern int _rpcsvcstate; /* Set when a request is serviced */
81char *progname = "ypserv";
82char *yp_dir = _PATH_YP;
83/*int debug = 0;*/
84int do_dns = 0;
85int resfd;
86
87static
88void _msgout(char* msg)
89{
90 if (debug) {
91 if (_rpcpmstart)
92 syslog(LOG_ERR, "%s", msg);
93 else
94 warnx("%s", msg);
95 } else
96 syslog(LOG_ERR, "%s", msg);
97}
98
99pid_t yp_pid;
100
101static void
102yp_svc_run()
103{
104#ifdef FD_SETSIZE
105 fd_set readfds;
106#else
107 int readfds;
108#endif /* def FD_SETSIZE */
109 extern int forked;
110 int fd_setsize = _rpc_dtablesize();
111 struct timeval timeout;
112
113 /* Establish the identity of the parent ypserv process. */
114 yp_pid = getpid();
115
116 for (;;) {
117#ifdef FD_SETSIZE
118 readfds = svc_fdset;
119#else
120 readfds = svc_fds;
121#endif /* def FD_SETSIZE */
122
123 FD_SET(resfd, &readfds);
124
125 timeout.tv_sec = RESOLVER_TIMEOUT;
126 timeout.tv_usec = 0;
127 switch (select(fd_setsize, &readfds, NULL, NULL,
128 &timeout)) {
129 case -1:
130 if (errno == EINTR) {
131 continue;
132 }
133 warn("svc_run: - select failed");
134 return;
135 case 0:
136 if (getpid() == yp_pid)
137 yp_prune_dnsq();
138 break;
139 default:
140 if (getpid() == yp_pid) {
141 if (FD_ISSET(resfd, &readfds)) {
142 yp_run_dnsq();
143 FD_CLR(resfd, &readfds);
144 }
145 svc_getreqset(&readfds);
146 }
147 }
148 if (yp_pid != getpid())
149 _exit(0);
150 }
151}
152
153static void unregister()
154{
155 (void) pmap_unset(YPPROG, YPVERS);
156 (void) pmap_unset(YPPROG, YPOLDVERS);
157}
158
159static void reaper(sig)
160 int sig;
161{
162 int status;
163 int saved_errno;
164
165 saved_errno = errno;
166
167 if (sig == SIGHUP) {
168 load_securenets();
169#ifdef DB_CACHE
170 yp_flush_all();
171#endif
172 errno = saved_errno;
173 return;
174 }
175
176 if (sig == SIGCHLD) {
177 while (wait3(&status, WNOHANG, NULL) > 0)
178 children--;
179 } else {
180 unregister();
181 exit(0);
182 }
183 errno = saved_errno;
184 return;
185}
186
187static void usage()
188{
189 fprintf(stderr, "usage: ypserv [-h] [-d] [-n] [-p path]\n");
190 exit(1);
191}
192
193static void
194closedown(int sig)
195{
196 if (_rpcsvcstate == _IDLE) {
197 extern fd_set svc_fdset;
198 static int size;
199 int i, openfd;
200
201 if (_rpcfdtype == SOCK_DGRAM) {
202 unregister();
203 exit(0);
204 }
205 if (size == 0) {
206 size = getdtablesize();
207 }
208 for (i = 0, openfd = 0; i < size && openfd < 2; i++)
209 if (FD_ISSET(i, &svc_fdset))
210 openfd++;
211 if (openfd <= 1) {
212 unregister();
213 exit(0);
214 }
215 }
216 if (_rpcsvcstate == _SERVED)
217 _rpcsvcstate = _IDLE;
218
219 (void) signal(SIGALRM, (SIG_PF) closedown);
220 (void) alarm(_RPCSVC_CLOSEDOWN/2);
221}
222
223int
224main(argc, argv)
225 int argc;
226 char *argv[];
227{
228 register SVCXPRT *transp = NULL;
229 int sock;
230 int proto = 0;
231 struct sockaddr_in saddr;
232 int asize = sizeof (saddr);
233 int ch;
234
235 while ((ch = getopt(argc, argv, "hdnp:")) != -1) {
236 switch (ch) {
237 case 'd':
238 debug = ypdb_debug = 1;
239 break;
240 case 'n':
241 do_dns = 1;
242 break;
243 case 'p':
244 yp_dir = optarg;
245 break;
246 case 'h':
247 default:
248 usage();
249 }
250 }
251
252 load_securenets();
253 yp_init_resolver();
254#ifdef DB_CACHE
255 yp_init_dbs();
256#endif
257 if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
258 int ssize = sizeof (int);
259
260 if (saddr.sin_family != AF_INET)
261 exit(1);
262 if (getsockopt(0, SOL_SOCKET, SO_TYPE,
263 (char *)&_rpcfdtype, &ssize) == -1)
264 exit(1);
265 sock = 0;
266 _rpcpmstart = 1;
267 proto = 0;
268 openlog("ypserv", LOG_PID, LOG_DAEMON);
269 } else {
270 if (!debug) {
271 if (daemon(0,0)) {
272 err(1,"cannot fork");
273 }
274 openlog("ypserv", LOG_PID, LOG_DAEMON);
275 }
276 sock = RPC_ANYSOCK;
277 (void) pmap_unset(YPPROG, YPVERS);
278 (void) pmap_unset(YPPROG, 1);
279 }
280
281 if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
282 transp = svcudp_create(sock);
283 if (transp == NULL) {
284 _msgout("cannot create udp service");
285 exit(1);
286 }
287 if (!_rpcpmstart)
288 proto = IPPROTO_UDP;
289 if (!svc_register(transp, YPPROG, YPOLDVERS, ypprog_1, proto)) {
290 _msgout("unable to register (YPPROG, YPOLDVERS, udp)");
291 exit(1);
292 }
293 if (!svc_register(transp, YPPROG, YPVERS, ypprog_2, proto)) {
294 _msgout("unable to register (YPPROG, YPVERS, udp)");
295 exit(1);
296 }
297 }
298
299 if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
300 transp = svctcp_create(sock, 0, 0);
301 if (transp == NULL) {
302 _msgout("cannot create tcp service");
303 exit(1);
304 }
305 if (!_rpcpmstart)
306 proto = IPPROTO_TCP;
307 if (!svc_register(transp, YPPROG, YPOLDVERS, ypprog_1, proto)) {
308 _msgout("unable to register (YPPROG, YPOLDVERS, tcp)");
309 exit(1);
310 }
311 if (!svc_register(transp, YPPROG, YPVERS, ypprog_2, proto)) {
312 _msgout("unable to register (YPPROG, YPVERS, tcp)");
313 exit(1);
314 }
315 }
316
317 if (transp == (SVCXPRT *)NULL) {
318 _msgout("could not create a handle");
319 exit(1);
320 }
321 if (_rpcpmstart) {
322 (void) signal(SIGALRM, (SIG_PF) closedown);
323 (void) alarm(_RPCSVC_CLOSEDOWN/2);
324 }
325/*
326 * Make sure SIGPIPE doesn't blow us away while servicing TCP
327 * connections.
328 */
329 (void) signal(SIGPIPE, SIG_IGN);
330 (void) signal(SIGCHLD, (SIG_PF) reaper);
331 (void) signal(SIGTERM, (SIG_PF) reaper);
332 (void) signal(SIGINT, (SIG_PF) reaper);
333 (void) signal(SIGHUP, (SIG_PF) reaper);
334 yp_svc_run();
335 _msgout("svc_run returned");
336 exit(1);
337 /* NOTREACHED */
338}