new doc makefiles

[unix-history] / usr / src / share / doc / psd / 20.ipctut / streamwrite.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[] = "@(#)streamwrite.c       6.3 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>

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

/*
* This program creates a socket and initiates a connection with the socket
* given in the command line.  One message is sent over the connection and
* then the socket is closed, ending the connection. The form of the command
* line is streamwrite hostname portnumber 
*/

main(argc, argv)
       int argc;
       char *argv[];
{
       int sock;
       struct sockaddr_in server;
       struct hostent *hp, *gethostbyname();
       char buf[1024];

       /* Create socket */
       sock = socket(AF_INET, SOCK_STREAM, 0);
       if (sock < 0) {
               perror("opening stream socket");
               exit(1);
       }
       /* Connect socket using name specified by command line. */
       server.sin_family = AF_INET;
       hp = gethostbyname(argv[1]);
       if (hp == 0) {
               fprintf(stderr, "%s: unknown host\n", argv[1]);
               exit(2);
       }
       bcopy(hp->h_addr, &server.sin_addr, hp->h_length);
       server.sin_port = htons(atoi(argv[2]));

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