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Annotation of 43BSDReno/share/doc/ps1/07.ipctut/udgramread.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[] = "@(#)udgramread.c       6.4 (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: 
                     32: /*
                     33:  * In the included file <sys/un.h> a sockaddr_un is defined as follows
                     34:  * struct sockaddr_un {
                     35:  *     short   sun_family;
                     36:  *     char    sun_path[108];
                     37:  * }; 
                     38:  */
                     39: 
                     40: #include <stdio.h>
                     41: 
                     42: #define NAME "socket"
                     43: 
                     44: /*
                     45:  * This program creates a UNIX domain datagram socket, binds a name to it,
                     46:  * then reads from the socket. 
                     47:  */
                     48: main()
                     49: {
                     50:        int sock, length;
                     51:        struct sockaddr_un name;
                     52:        char buf[1024];
                     53: 
                     54:        /* Create socket from which to read. */
                     55:        sock = socket(AF_UNIX, SOCK_DGRAM, 0);
                     56:        if (sock < 0) {
                     57:                perror("opening datagram socket");
                     58:                exit(1);
                     59:        }
                     60:        /* Create name. */
                     61:        name.sun_family = AF_UNIX;
                     62:        strcpy(name.sun_path, NAME);
                     63:        if (bind(sock, &name, sizeof(struct sockaddr_un))) {
                     64:                perror("binding name to datagram socket");
                     65:                exit(1);
                     66:        }
                     67:        printf("socket -->%s\en", NAME);
                     68:        /* Read from the socket */
                     69:        if (read(sock, buf, 1024) < 0)
                     70:                perror("receiving datagram packet");
                     71:        printf("-->%s\en", buf);
                     72:        close(sock);
                     73:        unlink(NAME);
                     74: }

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