usr/src/cmd/cmd-inet/usr.lib/in.echod/in.echod.c

   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  * echo 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 <netinet/in.h>
  38 #include <inetsvc.h>
  39
  40
  41 static void
  42 echo_stream(int s, char *argv[])
  43 {
  44         char    buffer[BUFSIZ];
  45         int     i;
  46
  47         setproctitle("echo", s, argv);
  48         while (((i = read(s, buffer, sizeof (buffer))) > 0) &&
  49             (safe_write(s, buffer, i) == 0)) {
  50                 ;
  51         }
  52 }
  53
  54 static void
  55 echo_dg(int s, const struct sockaddr *sap, int sa_size, const void *buf,
  56     size_t bufsiz)
  57 {
  58         (void) safe_sendto(s, buf, bufsiz, 0, sap, sa_size);
  59 }
  60
  61
  62 int
  63 main(int argc, char *argv[])
  64 {
  65         char            buf[BUFSIZ];
  66
  67         opterr = 0;     /* disable getopt error msgs */
  68         switch (getopt(argc, argv, "ds")) {
  69         case 'd':
  70                 dg_template(echo_dg, STDIN_FILENO, buf, sizeof (buf));
  71                 break;
  72         case 's':
  73                 echo_stream(STDIN_FILENO, argv);
  74                 break;
  75         default:
  76                 return (1);
  77         }
  78
  79         return (0);
  80 }