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Annotation of 43BSDReno/share/doc/ps1/07.ipctut/udgramsend.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[] = "@(#)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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