new doc makefiles

[unix-history] / usr / src / share / doc / psd / 20.ipctut / udgramsend.c

/*
 * Copyright (c) 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1986 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)udgramsend.c	6.3 (Berkeley) %G%";
#endif /* not lint */

#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);
}