2 * Copyright (c) 1993 Christopher G. Demetriou
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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. The name of the author may not be used to endorse or promote
14 * products derived from this software without specific prior written
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $FreeBSD: src/libexec/rpc.rwalld/rwalld.c,v 1.8 1999/08/28 00:09:57 peter Exp $
40 #include <rpc/pmap_clnt.h>
41 #include <rpcsvc/rwall.h>
42 #include <sys/socket.h>
43 #include <sys/types.h>
48 #define WALL_CMD "/usr/sbin/wall"
50 #define WALL_CMD "/usr/bin/wall -n"
56 static void usage (void);
62 main(int argc, char *argv[])
66 struct sockaddr_in sa;
70 if (argc == 2 && !strcmp(argv[1], "-n"))
72 if (argc != 1 && !nodaemon)
76 struct passwd *pep = getpwnam("nobody");
84 * See if inetd started us
87 if (getsockname(0, (struct sockaddr *)&sa, &salen) < 0) {
97 (void)pmap_unset(WALLPROG, WALLVERS);
98 if ((s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
100 bzero((char *)&sa, sizeof sa);
101 if (bind(s, (struct sockaddr *)&sa, sizeof sa) < 0)
105 if (getsockname(s, (struct sockaddr *)&sa, &salen))
106 err(1, "getsockname");
108 pmap_set(WALLPROG, WALLVERS, IPPROTO_UDP, ntohs(sa.sin_port));
111 (void)pmap_unset(WALLPROG, WALLVERS);
114 (void)signal(SIGCHLD, killkids);
116 openlog("rpc.rwalld", LOG_CONS|LOG_PID, LOG_DAEMON);
118 transp = svcudp_create(sock);
119 if (transp == NULL) {
120 syslog(LOG_ERR, "cannot create udp service");
123 if (!svc_register(transp, WALLPROG, WALLVERS, wallprog_1, proto)) {
124 syslog(LOG_ERR, "unable to register (WALLPROG, WALLVERS, %s)", proto?"udp":"(inetd)");
128 syslog(LOG_ERR, "svc_run returned");
135 fprintf(stderr, "usage: rpc.rwalld [-n]\n");
148 while(wait4(-1, NULL, WNOHANG, NULL) > 0)
153 wallproc_wall_1_svc(wrapstring *s, struct svc_req *rqstp)
155 static void *dummy = NULL;
157 /* fork, popen wall with special option, and send the message */
161 pfp = popen(WALL_CMD, "w");
163 fprintf(pfp, "\007\007%s", *s);
172 wallprog_1(struct svc_req *rqstp, SVCXPRT *transp)
175 char *wallproc_wall_1_arg;
178 bool_t (*xdr_argument)(), (*xdr_result)();
181 switch (rqstp->rq_proc) {
183 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
187 xdr_argument = xdr_wrapstring;
188 xdr_result = xdr_void;
189 local = (char *(*)()) wallproc_wall_1_svc;
193 svcerr_noproc(transp);
196 bzero((char *)&argument, sizeof(argument));
197 if (!svc_getargs(transp, (xdrproc_t)xdr_argument, (caddr_t)&argument)) {
198 svcerr_decode(transp);
201 result = (*local)(&argument, rqstp);
202 if (result != NULL &&
203 !svc_sendreply(transp, (xdrproc_t)xdr_result, result)) {
204 svcerr_systemerr(transp);
206 if (!svc_freeargs(transp, (xdrproc_t)xdr_argument, (caddr_t)&argument)) {
207 syslog(LOG_ERR, "unable to free arguments");