xref: /illumos-gate/usr/src/cmd/cmd-inet/usr.lib/in.echod/in.echod.c (revision 2a8bcb4efb45d99ac41c94a75c396b362c414f7f)
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 /*
28  * echo inetd service - both stream and dgram based.
29  */
30 
31 #include <sys/types.h>
32 #include <sys/socket.h>
33 #include <unistd.h>
34 #include <stdio.h>
35 #include <netinet/in.h>
36 #include <inetsvc.h>
37 
38 
39 static void
echo_stream(int s,char * argv[])40 echo_stream(int s, char *argv[])
41 {
42 	char	buffer[BUFSIZ];
43 	int	i;
44 
45 	setproctitle("echo", s, argv);
46 	while (((i = read(s, buffer, sizeof (buffer))) > 0) &&
47 	    (safe_write(s, buffer, i) == 0)) {
48 		;
49 	}
50 }
51 
52 static void
echo_dg(int s,const struct sockaddr * sap,int sa_size,const void * buf,size_t bufsiz)53 echo_dg(int s, const struct sockaddr *sap, int sa_size, const void *buf,
54     size_t bufsiz)
55 {
56 	(void) safe_sendto(s, buf, bufsiz, 0, sap, sa_size);
57 }
58 
59 
60 int
main(int argc,char * argv[])61 main(int argc, char *argv[])
62 {
63 	char		buf[BUFSIZ];
64 
65 	opterr = 0;	/* disable getopt error msgs */
66 	switch (getopt(argc, argv, "ds")) {
67 	case 'd':
68 		dg_template(echo_dg, STDIN_FILENO, buf, sizeof (buf));
69 		break;
70 	case 's':
71 		echo_stream(STDIN_FILENO, argv);
72 		break;
73 	default:
74 		return (1);
75 	}
76 
77 	return (0);
78 }
79