1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 /*
30  * discard inetd service - both stream and dgram based.
31  */
32 
33 #include <sys/types.h>
34 #include <sys/socket.h>
35 #include <unistd.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <netinet/in.h>
39 #include <inetsvc.h>
40 
41 
42 static void
discard_stream(int s,char * argv[])43 discard_stream(int s, char *argv[])
44 {
45 	char buffer[BUFSIZ];
46 
47 	setproctitle("discard", s, argv);
48 	while (read(s, buffer, sizeof (buffer)) > 0)
49 		;
50 }
51 
52 /* ARGSUSED0 */
53 static void
noop(int s,const struct sockaddr * sap,int sa_size,const void * buf,size_t sz)54 noop(int s, const struct sockaddr *sap, int sa_size, const void *buf, size_t sz)
55 {
56 }
57 
58 int
main(int argc,char * argv[])59 main(int argc, char *argv[])
60 {
61 	opterr = 0;	/* disable getopt error msgs */
62 	switch (getopt(argc, argv, "ds")) {
63 	case 'd':
64 		/*
65 		 * We don't need to do any work since dg_template consumes the
66 		 * datagrams for us, and we just ignore them.
67 		 */
68 		dg_template(noop, STDIN_FILENO, NULL, 0);
69 		break;
70 	case 's':
71 		discard_stream(STDIN_FILENO, argv);
72 		break;
73 	default:
74 		return (1);
75 	}
76 
77 	return (0);
78 }
79