tighten up code to reduce wasted paper

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

.\" Copyright (c) 1986 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"     @(#)ustreamwrite.c      6.2 (Berkeley) %G%
.\"
#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(0);
       }
       /* 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(0);
       }
       if (write(sock, DATA, sizeof(DATA)) < 0)
               perror("writing on stream socket");
}