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984263bc MD |
1 | /* |
2 | * Copyright (c) 1995, 1996 | |
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/rpc.ypxfrd/ypxfrd_main.c,v 1.8.2.3 2002/02/15 00:46:58 des Exp $ | |
2e3ed54d | 33 | * $DragonFly: src/usr.sbin/rpc.ypxfrd/ypxfrd_main.c,v 1.5 2005/11/25 00:32:49 swildner Exp $ |
984263bc MD |
34 | */ |
35 | ||
984263bc MD |
36 | #include "ypxfrd.h" |
37 | #include <err.h> | |
38 | #include <fcntl.h> | |
39 | #include <paths.h> | |
40 | #include <stdio.h> | |
41 | #include <stdlib.h> /* getenv, exit */ | |
42 | #include <unistd.h> | |
43 | #include <rpc/pmap_clnt.h> /* for pmap_unset */ | |
44 | #include <string.h> /* strcmp */ | |
45 | #include <signal.h> | |
46 | #include <sys/ttycom.h> /* TIOCNOTTY */ | |
47 | #ifdef __cplusplus | |
48 | #include <sysent.h> /* getdtablesize, open */ | |
49 | #endif /* __cplusplus */ | |
50 | #include <memory.h> | |
51 | #include <sys/socket.h> | |
52 | #include <netinet/in.h> | |
53 | #include <syslog.h> | |
54 | #include "ypxfrd_extern.h" | |
55 | #include <sys/wait.h> | |
56 | #include <errno.h> | |
57 | ||
58 | #ifndef SIG_PF | |
59 | #define SIG_PF void(*)(int) | |
60 | #endif | |
61 | ||
62 | #ifdef DEBUG | |
63 | #define RPC_SVC_FG | |
64 | #endif | |
65 | ||
66 | #define _RPCSVC_CLOSEDOWN 120 | |
67 | int _rpcpmstart; /* Started by a port monitor ? */ | |
68 | static int _rpcfdtype; | |
69 | /* Whether Stream or Datagram ? */ | |
70 | /* States a server can be in wrt request */ | |
71 | ||
72 | #define _IDLE 0 | |
73 | #define _SERVED 1 | |
74 | #define _SERVING 2 | |
75 | ||
76 | extern int _rpcsvcstate; /* Set when a request is serviced */ | |
77 | ||
78 | char *progname = "rpc.ypxfrd"; | |
79 | char *yp_dir = "/var/yp/"; | |
80 | ||
2e3ed54d SW |
81 | static void |
82 | _msgout(char *msg) | |
984263bc MD |
83 | { |
84 | #ifdef RPC_SVC_FG | |
85 | if (_rpcpmstart) | |
86 | syslog(LOG_ERR, "%s", msg); | |
87 | else | |
88 | warnx("%s", msg); | |
89 | #else | |
90 | syslog(LOG_ERR, "%s", msg); | |
91 | #endif | |
92 | } | |
93 | ||
94 | static void | |
95 | closedown(int sig) | |
96 | { | |
97 | if (_rpcsvcstate == _IDLE) { | |
98 | extern fd_set svc_fdset; | |
99 | static int size; | |
100 | int i, openfd; | |
101 | ||
102 | if (_rpcfdtype == SOCK_DGRAM) | |
103 | exit(0); | |
104 | if (size == 0) { | |
105 | size = getdtablesize(); | |
106 | } | |
107 | for (i = 0, openfd = 0; i < size && openfd < 2; i++) | |
108 | if (FD_ISSET(i, &svc_fdset)) | |
109 | openfd++; | |
110 | if (openfd <= 1) | |
111 | exit(0); | |
112 | } | |
113 | if (_rpcsvcstate == _SERVED) | |
114 | _rpcsvcstate = _IDLE; | |
115 | ||
71126e33 SW |
116 | signal(SIGALRM, (SIG_PF) closedown); |
117 | alarm(_RPCSVC_CLOSEDOWN/2); | |
984263bc MD |
118 | } |
119 | ||
120 | ||
121 | static void | |
2e3ed54d | 122 | ypxfrd_svc_run(void) |
984263bc MD |
123 | { |
124 | #ifdef FD_SETSIZE | |
125 | fd_set readfds; | |
126 | #else | |
127 | int readfds; | |
128 | #endif /* def FD_SETSIZE */ | |
129 | extern int forked; | |
130 | int pid; | |
131 | int fd_setsize = _rpc_dtablesize(); | |
132 | ||
133 | /* Establish the identity of the parent ypserv process. */ | |
134 | pid = getpid(); | |
135 | ||
136 | for (;;) { | |
137 | #ifdef FD_SETSIZE | |
138 | readfds = svc_fdset; | |
139 | #else | |
140 | readfds = svc_fds; | |
141 | #endif /* def FD_SETSIZE */ | |
60233e58 | 142 | switch (select(fd_setsize, &readfds, NULL, NULL, NULL)) { |
984263bc MD |
143 | case -1: |
144 | if (errno == EINTR) { | |
145 | continue; | |
146 | } | |
147 | warn("svc_run: - select failed"); | |
148 | return; | |
149 | case 0: | |
150 | continue; | |
151 | default: | |
152 | svc_getreqset(&readfds); | |
153 | if (forked && pid != getpid()) | |
154 | exit(0); | |
155 | } | |
156 | } | |
157 | } | |
158 | ||
2e3ed54d SW |
159 | static void |
160 | reaper(int sig) | |
984263bc MD |
161 | { |
162 | int status; | |
163 | int saved_errno; | |
164 | ||
165 | saved_errno = errno; | |
166 | ||
167 | if (sig == SIGHUP) { | |
168 | load_securenets(); | |
169 | errno = saved_errno; | |
170 | return; | |
171 | } | |
172 | ||
173 | if (sig == SIGCHLD) { | |
174 | while (wait3(&status, WNOHANG, NULL) > 0) | |
175 | children--; | |
176 | } else { | |
71126e33 | 177 | pmap_unset(YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS); |
984263bc MD |
178 | exit(0); |
179 | } | |
180 | ||
181 | errno = saved_errno; | |
182 | return; | |
183 | } | |
184 | ||
2e3ed54d SW |
185 | void |
186 | usage(void) | |
984263bc MD |
187 | { |
188 | fprintf(stderr, "usage: rpc.ypxfrd [-p path]\n"); | |
189 | exit(0); | |
190 | } | |
191 | ||
192 | int | |
2e3ed54d | 193 | main(int argc, char *argv[]) |
984263bc | 194 | { |
1ab20d67 | 195 | SVCXPRT *transp = NULL; |
984263bc MD |
196 | int sock; |
197 | int proto = 0; | |
198 | struct sockaddr_in saddr; | |
199 | int asize = sizeof (saddr); | |
200 | int ch; | |
201 | ||
202 | while ((ch = getopt(argc, argv, "p:h")) != -1) { | |
203 | switch (ch) { | |
204 | case 'p': | |
205 | yp_dir = optarg; | |
206 | break; | |
207 | default: | |
208 | usage(); | |
209 | break; | |
210 | } | |
211 | } | |
212 | ||
213 | load_securenets(); | |
214 | ||
215 | if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) { | |
216 | int ssize = sizeof (int); | |
217 | ||
218 | if (saddr.sin_family != AF_INET) | |
219 | exit(1); | |
220 | if (getsockopt(0, SOL_SOCKET, SO_TYPE, | |
221 | (char *)&_rpcfdtype, &ssize) == -1) | |
222 | exit(1); | |
223 | sock = 0; | |
224 | _rpcpmstart = 1; | |
225 | proto = 0; | |
226 | openlog("rpc.ypxfrd", LOG_PID, LOG_DAEMON); | |
227 | } else { | |
228 | #ifndef RPC_SVC_FG | |
229 | int size; | |
230 | int pid, i; | |
231 | ||
232 | pid = fork(); | |
233 | if (pid < 0) | |
234 | err(1, "fork"); | |
235 | if (pid) | |
236 | exit(0); | |
237 | size = getdtablesize(); | |
238 | for (i = 0; i < size; i++) | |
71126e33 | 239 | close(i); |
984263bc | 240 | i = open(_PATH_CONSOLE, 2); |
71126e33 SW |
241 | dup2(i, 1); |
242 | dup2(i, 2); | |
984263bc MD |
243 | i = open(_PATH_TTY, 2); |
244 | if (i >= 0) { | |
2038fb68 | 245 | ioctl(i, TIOCNOTTY, NULL); |
71126e33 | 246 | close(i); |
984263bc MD |
247 | } |
248 | openlog("rpc.ypxfrd", LOG_PID, LOG_DAEMON); | |
249 | #endif | |
250 | sock = RPC_ANYSOCK; | |
71126e33 | 251 | pmap_unset(YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS); |
984263bc MD |
252 | } |
253 | ||
254 | if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) { | |
255 | transp = svcudp_create(sock); | |
256 | if (transp == NULL) { | |
257 | _msgout("cannot create udp service."); | |
258 | exit(1); | |
259 | } | |
260 | if (!_rpcpmstart) | |
261 | proto = IPPROTO_UDP; | |
262 | if (!svc_register(transp, YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, ypxfrd_freebsd_prog_1, proto)) { | |
263 | _msgout("unable to register (YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, udp)."); | |
264 | exit(1); | |
265 | } | |
266 | } | |
267 | ||
268 | if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) { | |
269 | transp = svctcp_create(sock, 0, 0); | |
270 | if (transp == NULL) { | |
271 | _msgout("cannot create tcp service."); | |
272 | exit(1); | |
273 | } | |
274 | if (!_rpcpmstart) | |
275 | proto = IPPROTO_TCP; | |
276 | if (!svc_register(transp, YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, ypxfrd_freebsd_prog_1, proto)) { | |
277 | _msgout("unable to register (YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, tcp)."); | |
278 | exit(1); | |
279 | } | |
280 | } | |
281 | ||
2038fb68 | 282 | if (transp == NULL) { |
984263bc MD |
283 | _msgout("could not create a handle"); |
284 | exit(1); | |
285 | } | |
286 | if (_rpcpmstart) { | |
71126e33 SW |
287 | signal(SIGALRM, (SIG_PF) closedown); |
288 | alarm(_RPCSVC_CLOSEDOWN/2); | |
984263bc MD |
289 | } |
290 | ||
71126e33 SW |
291 | signal(SIGPIPE, SIG_IGN); |
292 | signal(SIGCHLD, (SIG_PF) reaper); | |
293 | signal(SIGTERM, (SIG_PF) reaper); | |
294 | signal(SIGINT, (SIG_PF) reaper); | |
295 | signal(SIGHUP, (SIG_PF) reaper); | |
984263bc MD |
296 | |
297 | ypxfrd_svc_run(); | |
298 | _msgout("svc_run returned"); | |
299 | exit(1); | |
300 | /* NOTREACHED */ | |
301 | } |