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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 $ | |
984263bc MD |
33 | */ |
34 | ||
984263bc MD |
35 | #include "ypxfrd.h" |
36 | #include <err.h> | |
37 | #include <fcntl.h> | |
38 | #include <paths.h> | |
39 | #include <stdio.h> | |
40 | #include <stdlib.h> /* getenv, exit */ | |
41 | #include <unistd.h> | |
42 | #include <rpc/pmap_clnt.h> /* for pmap_unset */ | |
74457d3f | 43 | #include <rpc/rpc_com.h> |
984263bc MD |
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 | ||
04277bb2 SW |
78 | int debug; |
79 | ||
984263bc MD |
80 | char *progname = "rpc.ypxfrd"; |
81 | char *yp_dir = "/var/yp/"; | |
82 | ||
2e3ed54d SW |
83 | static void |
84 | _msgout(char *msg) | |
984263bc MD |
85 | { |
86 | #ifdef RPC_SVC_FG | |
87 | if (_rpcpmstart) | |
88 | syslog(LOG_ERR, "%s", msg); | |
89 | else | |
90 | warnx("%s", msg); | |
91 | #else | |
92 | syslog(LOG_ERR, "%s", msg); | |
93 | #endif | |
94 | } | |
95 | ||
96 | static void | |
97 | closedown(int sig) | |
98 | { | |
99 | if (_rpcsvcstate == _IDLE) { | |
100 | extern fd_set svc_fdset; | |
101 | static int size; | |
102 | int i, openfd; | |
103 | ||
104 | if (_rpcfdtype == SOCK_DGRAM) | |
105 | exit(0); | |
106 | if (size == 0) { | |
107 | size = getdtablesize(); | |
108 | } | |
109 | for (i = 0, openfd = 0; i < size && openfd < 2; i++) | |
110 | if (FD_ISSET(i, &svc_fdset)) | |
111 | openfd++; | |
112 | if (openfd <= 1) | |
113 | exit(0); | |
114 | } | |
115 | if (_rpcsvcstate == _SERVED) | |
116 | _rpcsvcstate = _IDLE; | |
117 | ||
71126e33 SW |
118 | signal(SIGALRM, (SIG_PF) closedown); |
119 | alarm(_RPCSVC_CLOSEDOWN/2); | |
984263bc MD |
120 | } |
121 | ||
122 | ||
123 | static void | |
2e3ed54d | 124 | ypxfrd_svc_run(void) |
984263bc MD |
125 | { |
126 | #ifdef FD_SETSIZE | |
127 | fd_set readfds; | |
128 | #else | |
129 | int readfds; | |
130 | #endif /* def FD_SETSIZE */ | |
131 | extern int forked; | |
132 | int pid; | |
133 | int fd_setsize = _rpc_dtablesize(); | |
134 | ||
135 | /* Establish the identity of the parent ypserv process. */ | |
136 | pid = getpid(); | |
137 | ||
138 | for (;;) { | |
139 | #ifdef FD_SETSIZE | |
140 | readfds = svc_fdset; | |
141 | #else | |
142 | readfds = svc_fds; | |
143 | #endif /* def FD_SETSIZE */ | |
60233e58 | 144 | switch (select(fd_setsize, &readfds, NULL, NULL, NULL)) { |
984263bc MD |
145 | case -1: |
146 | if (errno == EINTR) { | |
147 | continue; | |
148 | } | |
149 | warn("svc_run: - select failed"); | |
150 | return; | |
151 | case 0: | |
152 | continue; | |
153 | default: | |
154 | svc_getreqset(&readfds); | |
155 | if (forked && pid != getpid()) | |
156 | exit(0); | |
157 | } | |
158 | } | |
159 | } | |
160 | ||
2e3ed54d SW |
161 | static void |
162 | reaper(int sig) | |
984263bc MD |
163 | { |
164 | int status; | |
165 | int saved_errno; | |
166 | ||
167 | saved_errno = errno; | |
168 | ||
169 | if (sig == SIGHUP) { | |
170 | load_securenets(); | |
171 | errno = saved_errno; | |
172 | return; | |
173 | } | |
174 | ||
175 | if (sig == SIGCHLD) { | |
176 | while (wait3(&status, WNOHANG, NULL) > 0) | |
177 | children--; | |
178 | } else { | |
71126e33 | 179 | pmap_unset(YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS); |
984263bc MD |
180 | exit(0); |
181 | } | |
182 | ||
183 | errno = saved_errno; | |
184 | return; | |
185 | } | |
186 | ||
fe08e20d | 187 | __dead2 void |
2e3ed54d | 188 | usage(void) |
984263bc MD |
189 | { |
190 | fprintf(stderr, "usage: rpc.ypxfrd [-p path]\n"); | |
191 | exit(0); | |
192 | } | |
193 | ||
194 | int | |
2e3ed54d | 195 | main(int argc, char *argv[]) |
984263bc | 196 | { |
1ab20d67 | 197 | SVCXPRT *transp = NULL; |
984263bc MD |
198 | int sock; |
199 | int proto = 0; | |
200 | struct sockaddr_in saddr; | |
201 | int asize = sizeof (saddr); | |
202 | int ch; | |
203 | ||
204 | while ((ch = getopt(argc, argv, "p:h")) != -1) { | |
205 | switch (ch) { | |
206 | case 'p': | |
207 | yp_dir = optarg; | |
208 | break; | |
209 | default: | |
210 | usage(); | |
211 | break; | |
212 | } | |
213 | } | |
214 | ||
215 | load_securenets(); | |
216 | ||
217 | if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) { | |
218 | int ssize = sizeof (int); | |
219 | ||
220 | if (saddr.sin_family != AF_INET) | |
221 | exit(1); | |
222 | if (getsockopt(0, SOL_SOCKET, SO_TYPE, | |
223 | (char *)&_rpcfdtype, &ssize) == -1) | |
224 | exit(1); | |
225 | sock = 0; | |
226 | _rpcpmstart = 1; | |
227 | proto = 0; | |
228 | openlog("rpc.ypxfrd", LOG_PID, LOG_DAEMON); | |
229 | } else { | |
230 | #ifndef RPC_SVC_FG | |
231 | int size; | |
232 | int pid, i; | |
233 | ||
234 | pid = fork(); | |
235 | if (pid < 0) | |
236 | err(1, "fork"); | |
237 | if (pid) | |
238 | exit(0); | |
239 | size = getdtablesize(); | |
240 | for (i = 0; i < size; i++) | |
71126e33 | 241 | close(i); |
984263bc | 242 | i = open(_PATH_CONSOLE, 2); |
71126e33 SW |
243 | dup2(i, 1); |
244 | dup2(i, 2); | |
984263bc MD |
245 | i = open(_PATH_TTY, 2); |
246 | if (i >= 0) { | |
2038fb68 | 247 | ioctl(i, TIOCNOTTY, NULL); |
71126e33 | 248 | close(i); |
984263bc MD |
249 | } |
250 | openlog("rpc.ypxfrd", LOG_PID, LOG_DAEMON); | |
251 | #endif | |
252 | sock = RPC_ANYSOCK; | |
71126e33 | 253 | pmap_unset(YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS); |
984263bc MD |
254 | } |
255 | ||
256 | if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) { | |
257 | transp = svcudp_create(sock); | |
258 | if (transp == NULL) { | |
259 | _msgout("cannot create udp service."); | |
260 | exit(1); | |
261 | } | |
262 | if (!_rpcpmstart) | |
263 | proto = IPPROTO_UDP; | |
264 | if (!svc_register(transp, YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, ypxfrd_freebsd_prog_1, proto)) { | |
265 | _msgout("unable to register (YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, udp)."); | |
266 | exit(1); | |
267 | } | |
268 | } | |
269 | ||
270 | if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) { | |
271 | transp = svctcp_create(sock, 0, 0); | |
272 | if (transp == NULL) { | |
273 | _msgout("cannot create tcp service."); | |
274 | exit(1); | |
275 | } | |
276 | if (!_rpcpmstart) | |
277 | proto = IPPROTO_TCP; | |
278 | if (!svc_register(transp, YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, ypxfrd_freebsd_prog_1, proto)) { | |
279 | _msgout("unable to register (YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, tcp)."); | |
280 | exit(1); | |
281 | } | |
282 | } | |
283 | ||
2038fb68 | 284 | if (transp == NULL) { |
984263bc MD |
285 | _msgout("could not create a handle"); |
286 | exit(1); | |
287 | } | |
288 | if (_rpcpmstart) { | |
71126e33 SW |
289 | signal(SIGALRM, (SIG_PF) closedown); |
290 | alarm(_RPCSVC_CLOSEDOWN/2); | |
984263bc MD |
291 | } |
292 | ||
71126e33 SW |
293 | signal(SIGPIPE, SIG_IGN); |
294 | signal(SIGCHLD, (SIG_PF) reaper); | |
295 | signal(SIGTERM, (SIG_PF) reaper); | |
296 | signal(SIGINT, (SIG_PF) reaper); | |
297 | signal(SIGHUP, (SIG_PF) reaper); | |
984263bc MD |
298 | |
299 | ypxfrd_svc_run(); | |
300 | _msgout("svc_run returned"); | |
301 | exit(1); | |
302 | /* NOTREACHED */ | |
303 | } |