Return to streamwrite.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / share / doc / ps1 / 07.ipctut

Annotation of 43BSDReno/share/doc/ps1/07.ipctut/streamwrite.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1986 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  */
                     17: 
                     18: #ifndef lint
                     19: char copyright[] =
                     20: "@(#) Copyright (c) 1986 The Regents of the University of California.\n\
                     21:  All rights reserved.\n";
                     22: #endif /* not lint */
                     23: 
                     24: #ifndef lint
                     25: static char sccsid[] = "@(#)streamwrite.c      6.3 (Berkeley) 3/7/89";
                     26: #endif /* not lint */
                     27: 
                     28: #include <sys/types.h>
                     29: #include <sys/socket.h>
                     30: #include <netinet/in.h>
                     31: #include <netdb.h>
                     32: #include <stdio.h>
                     33: 
                     34: #define DATA "Half a league, half a league . . ."
                     35: 
                     36: /*
                     37:  * This program creates a socket and initiates a connection with the socket
                     38:  * given in the command line.  One message is sent over the connection and
                     39:  * then the socket is closed, ending the connection. The form of the command
                     40:  * line is streamwrite hostname portnumber 
                     41:  */
                     42: 
                     43: main(argc, argv)
                     44:        int argc;
                     45:        char *argv[];
                     46: {
                     47:        int sock;
                     48:        struct sockaddr_in server;
                     49:        struct hostent *hp, *gethostbyname();
                     50:        char buf[1024];
                     51: 
                     52:        /* Create socket */
                     53:        sock = socket(AF_INET, SOCK_STREAM, 0);
                     54:        if (sock < 0) {
                     55:                perror("opening stream socket");
                     56:                exit(1);
                     57:        }
                     58:        /* Connect socket using name specified by command line. */
                     59:        server.sin_family = AF_INET;
                     60:        hp = gethostbyname(argv[1]);
                     61:        if (hp == 0) {
                     62:                fprintf(stderr, "%s: unknown host\n", argv[1]);
                     63:                exit(2);
                     64:        }
                     65:        bcopy(hp->h_addr, &server.sin_addr, hp->h_length);
                     66:        server.sin_port = htons(atoi(argv[2]));
                     67: 
                     68:        if (connect(sock, &server, sizeof(server)) < 0) {
                     69:                perror("connecting stream socket");
                     70:                exit(1);
                     71:        }
                     72:        if (write(sock, DATA, sizeof(DATA)) < 0)
                     73:                perror("writing on stream socket");
                     74:        close(sock);
                     75: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.