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 const char rcsid[] =
42 #include <arpa/inet.h>
44 #include <rpcsvc/rwall.h>
45 #include <sys/socket.h>
46 #include <sys/types.h>
51 #define WALL_CMD "/usr/sbin/wall"
53 #define WALL_CMD "/usr/bin/wall -n"
56 void wallprog_1(struct svc_req *rqstp, SVCXPRT *transp);
58 void killkids(int sig);
59 static void usage(void);
65 main(int argc, char *argv[])
69 struct sockaddr_storage sa;
71 if (argc == 2 && !strcmp(argv[1], "-n"))
73 if (argc != 1 && !nodaemon)
77 struct passwd *pep = getpwnam("nobody");
85 * See if inetd started us
88 if (getsockname(0, (struct sockaddr *)&sa, &salen) < 0) {
96 (void)rpcb_unset(WALLPROG, WALLVERS, NULL);
99 (void)signal(SIGCHLD, killkids);
101 openlog("rpc.rwalld", LOG_CONS|LOG_PID, LOG_DAEMON);
103 /* create and register the service */
105 transp = svc_tli_create(0, NULL, NULL, 0, 0);
106 if (transp == NULL) {
107 syslog(LOG_ERR, "couldn't create udp service.");
110 ok = svc_reg(transp, WALLPROG, WALLVERS,
113 ok = svc_create(wallprog_1,
114 WALLPROG, WALLVERS, "udp");
116 syslog(LOG_ERR, "unable to register (WALLPROG, WALLVERS, %s)", (!from_inetd)?"udp":"(inetd)");
120 syslog(LOG_ERR, "svc_run returned");
127 fprintf(stderr, "usage: rpc.rwalld [-n]\n");
140 while(wait4(-1, NULL, WNOHANG, NULL) > 0)
145 wallproc_wall_1_svc(wrapstring *s, struct svc_req *rqstp)
147 static void *dummy = NULL;
149 /* fork, popen wall with special option, and send the message */
153 pfp = popen(WALL_CMD, "w");
155 fprintf(pfp, "\007\007%s", *s);
164 wallprog_1(struct svc_req *rqstp, SVCXPRT *transp)
167 char *wallproc_wall_1_arg;
170 bool_t (*xdr_argument)(), (*xdr_result)();
173 switch (rqstp->rq_proc) {
175 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
179 xdr_argument = xdr_wrapstring;
180 xdr_result = xdr_void;
181 local = (char *(*)()) wallproc_wall_1_svc;
185 svcerr_noproc(transp);
188 bzero(&argument, sizeof(argument));
189 if (!svc_getargs(transp, (xdrproc_t)xdr_argument, &argument)) {
190 svcerr_decode(transp);
193 result = (*local)(&argument, rqstp);
194 if (result != NULL &&
195 !svc_sendreply(transp, (xdrproc_t)xdr_result, result)) {
196 svcerr_systemerr(transp);
198 if (!svc_freeargs(transp, (xdrproc_t)xdr_argument, &argument)) {
199 syslog(LOG_ERR, "unable to free arguments");