xref: /src/share/doc/psd/20.ipctut/udgramsend.c

.\"	$NetBSD: udgramsend.c,v 1.2 1998/01/09 06:55:07 perry Exp $
.\"
.\" Copyright (c) 1986, 1993
.\"	The Regents of the University of California.  All rights reserved.
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.\" modification, are permitted provided that the following conditions
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.\"    notice, this list of conditions and the following disclaimer in the
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.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\"	@(#)udgramsend.c	8.1 (Berkeley) 6/8/93
.\"
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>

#define DATA "The sea is calm tonight, the tide is full . . ."

/*
 * Here I send a datagram to a receiver whose name I get from the command
 * line arguments.  The form of the command line is udgramsend pathname
 */

main(argc, argv)
	int argc;
	char *argv[];
{
	int sock;
	struct sockaddr_un name;

	/* Create socket on which to send. */
	sock = socket(AF_UNIX, SOCK_DGRAM, 0);
	if (sock < 0) {
		perror("opening datagram socket");
		exit(1);
	}
	/* Construct name of socket to send to. */
	name.sun_family = AF_UNIX;
	strcpy(name.sun_path, argv[1]);
	/* Send message. */
	if (sendto(sock, DATA, sizeof(DATA), 0,
	    &name, sizeof(struct sockaddr_un)) < 0) {
		perror("sending datagram message");
	}
	close(sock);
}