libexec/rpc.rusersd/rusersd.c

   1 /*-
   2  * Copyright (c) 1993, John Brezak
   3  * 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 the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * $FreeBSD: src/libexec/rpc.rusersd/rusersd.c,v 1.8 1999/08/28 00:09:56 peter Exp $
  34  * $DragonFly: src/libexec/rpc.rusersd/rusersd.c,v 1.2 2003/06/17 04:27:07 dillon Exp $
  35  */
  36
  37 #include <stdlib.h>
  38 #include <rpc/rpc.h>
  39 #include <rpc/pmap_clnt.h>
  40 #include <signal.h>
  41 #include <syslog.h>
  42 #define utmp rutmp
  43 #include <rpcsvc/rnusers.h>
  44 #undef utmp
  45
  46 extern void rusers_service();
  47
  48 int from_inetd = 1;
  49
  50 void
  51 cleanup()
  52 {
  53         (void) pmap_unset(RUSERSPROG, RUSERSVERS_IDLE);
  54         (void) pmap_unset(RUSERSPROG, RUSERSVERS_ORIG);
  55         exit(0);
  56 }
  57
  58 int
  59 main(argc, argv)
  60         int argc;
  61         char *argv[];
  62 {
  63         SVCXPRT *transp;
  64         int sock = 0;
  65         int proto = 0;
  66         struct sockaddr_in from;
  67         int fromlen;
  68
  69         /*
  70          * See if inetd started us
  71          */
  72         fromlen = sizeof(from);
  73         if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
  74                 from_inetd = 0;
  75                 sock = RPC_ANYSOCK;
  76                 proto = IPPROTO_UDP;
  77         }
  78
  79         if (!from_inetd) {
  80                 daemon(0, 0);
  81
  82                 (void) pmap_unset(RUSERSPROG, RUSERSVERS_IDLE);
  83                 (void) pmap_unset(RUSERSPROG, RUSERSVERS_ORIG);
  84
  85                 (void) signal(SIGINT, cleanup);
  86                 (void) signal(SIGTERM, cleanup);
  87                 (void) signal(SIGHUP, cleanup);
  88         }
  89
  90         openlog("rpc.rusersd", LOG_CONS|LOG_PID, LOG_DAEMON);
  91
  92         transp = svcudp_create(sock);
  93         if (transp == NULL) {
  94                 syslog(LOG_ERR, "cannot create udp service");
  95                 exit(1);
  96         }
  97         if (!svc_register(transp, RUSERSPROG, RUSERSVERS_IDLE, rusers_service, proto)) {
  98                 syslog(LOG_ERR, "unable to register (RUSERSPROG, RUSERSVERS_IDLE, %s)", proto?"udp":"(inetd)");
  99                 exit(1);
 100         }
 101
 102         if (!svc_register(transp, RUSERSPROG, RUSERSVERS_ORIG, rusers_service, proto)) {
 103                 syslog(LOG_ERR, "unable to register (RUSERSPROG, RUSERSVERS_ORIG, %s)", proto?"udp":"(inetd)");
 104                 exit(1);
 105         }
 106
 107         svc_run();
 108         syslog(LOG_ERR, "svc_run returned");
 109         exit(1);
 110 }