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
31 static char rcsid[] = "$Id$";
35 #include <sys/types.h>
40 #include <sys/socket.h>
44 #include <rpcsvc/rwall.h>
47 #define WALL_CMD "/usr/sbin/wall"
49 #define WALL_CMD "/usr/bin/wall -n"
65 struct sockaddr_in sa;
69 if (argc == 2 && !strcmp(argv[1], "-n"))
71 if (argc != 1 && !nodaemon) {
72 printf("usage: %s [-n]\n", argv[0]);
77 struct passwd *pep = getpwnam("nobody");
85 * See if inetd started us
88 if (getsockname(0, (struct sockaddr *)&sa, &salen) < 0) {
98 (void)pmap_unset(WALLPROG, WALLVERS);
99 if ((s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
103 bzero((char *)&sa, sizeof sa);
104 if (bind(s, (struct sockaddr *)&sa, sizeof sa) < 0) {
110 if (getsockname(s, (struct sockaddr *)&sa, &salen)) {
111 perror("getsockname");
115 pmap_set(WALLPROG, WALLVERS, IPPROTO_UDP, ntohs(sa.sin_port));
116 if (dup2(s, 0) < 0) {
120 (void)pmap_unset(WALLPROG, WALLVERS);
123 (void)signal(SIGCHLD, killkids);
125 transp = svcudp_create(sock);
126 if (transp == NULL) {
127 (void)fprintf(stderr, "cannot create udp service.\n");
130 if (!svc_register(transp, WALLPROG, WALLVERS, wallprog_1, proto)) {
131 (void)fprintf(stderr, "unable to register (WALLPROG, WALLVERS, udp).\n");
135 (void)fprintf(stderr, "svc_run returned\n");
147 while(wait4(-1, NULL, WNOHANG, NULL) > 0)
151 void *wallproc_wall_1(s)
154 /* fork, popen wall with special option, and send the message */
158 pfp = popen(WALL_CMD, "w");
160 fprintf(pfp, "\007\007%s", *s);
168 wallprog_1(rqstp, transp)
169 struct svc_req *rqstp;
173 char *wallproc_wall_1_arg;
176 bool_t (*xdr_argument)(), (*xdr_result)();
179 switch (rqstp->rq_proc) {
181 (void)svc_sendreply(transp, xdr_void, (char *)NULL);
185 xdr_argument = xdr_wrapstring;
186 xdr_result = xdr_void;
187 local = (char *(*)()) wallproc_wall_1;
191 svcerr_noproc(transp);
194 bzero((char *)&argument, sizeof(argument));
195 if (!svc_getargs(transp, xdr_argument, &argument)) {
196 svcerr_decode(transp);
199 result = (*local)(&argument, rqstp);
200 if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
201 svcerr_systemerr(transp);
203 if (!svc_freeargs(transp, xdr_argument, &argument)) {
204 (void)fprintf(stderr, "unable to free arguments\n");