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Annotation of 43BSDReno/share/doc/ps1/07.ipctut/udgramsend.c, revision 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[] = "@(#)udgramsend.c       6.3 (Berkeley) 3/7/89";
        !            26: #endif /* not lint */
        !            27: 
        !            28: #include <sys/types.h>
        !            29: #include <sys/socket.h>
        !            30: #include <sys/un.h>
        !            31: #include <stdio.h>
        !            32: 
        !            33: #define DATA "The sea is calm tonight, the tide is full . . ."
        !            34: 
        !            35: /*
        !            36:  * Here I send a datagram to a receiver whose name I get from the command
        !            37:  * line arguments.  The form of the command line is udgramsend pathname 
        !            38:  */
        !            39: 
        !            40: main(argc, argv)
        !            41:        int argc;
        !            42:        char *argv[];
        !            43: {
        !            44:        int sock;
        !            45:        struct sockaddr_un name;
        !            46: 
        !            47:        /* Create socket on which to send. */
        !            48:        sock = socket(AF_UNIX, SOCK_DGRAM, 0);
        !            49:        if (sock < 0) {
        !            50:                perror("opening datagram socket");
        !            51:                exit(1);
        !            52:        }
        !            53:        /* Construct name of socket to send to. */
        !            54:        name.sun_family = AF_UNIX;
        !            55:        strcpy(name.sun_path, argv[1]);
        !            56:        /* Send message. */
        !            57:        if (sendto(sock, DATA, sizeof(DATA), 0,
        !            58:            &name, sizeof(struct sockaddr_un)) < 0) {
        !            59:                perror("sending datagram message");
        !            60:        }
        !            61:        close(sock);
        !            62: }

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