4.3BSD-Reno/share/doc/ps1/07.ipctut/ustreamwrite.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[] = "@(#)ustreamwrite.c	6.4 (Berkeley) 3/7/89";
#endif /* not lint */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>

#define DATA "Half a league, half a league . . ."

/*
 * This program connects to the socket named in the command line and sends a
 * one line message to that socket. The form of the command line is
 * ustreamwrite pathname 
 */
main(argc, argv)
	int argc;
	char *argv[];
{
	int sock;
	struct sockaddr_un server;
	char buf[1024];

	/* Create socket */
	sock = socket(AF_UNIX, SOCK_STREAM, 0);
	if (sock < 0) {
		perror("opening stream socket");
		exit(1);
	}
	/* Connect socket using name specified by command line. */
	server.sun_family = AF_UNIX;
	strcpy(server.sun_path, argv[1]);

	if (connect(sock, &server, sizeof(struct sockaddr_un)) < 0) {
		close(sock);
		perror("connecting stream socket");
		exit(1);
	}
	if (write(sock, DATA, sizeof(DATA)) < 0)
		perror("writing on stream socket");
}