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Annotation of 42BSD/ingres/source/support/initsocket.c, revision 1.1

1.1     ! root        1: # include      <stdio.h>
        !             2: # include      <sys/types.h>
        !             3: # include      <sys/socket.h>
        !             4: # include      <sys/ioctl.h>
        !             5: # include      <netinet/in.h>
        !             6: # include      <netdb.h>
        !             7: # include      <signal.h>
        !             8: 
        !             9: static char    Sccsid[] = "%W% (INGRES) %G%";
        !            10: 
        !            11: /*
        !            12: ** init_socket
        !            13: ** initilize the socket to the socket server
        !            14: */
        !            15: init_socket()
        !            16: {
        !            17:        register        int     from_socket;    /* file descriptor to attach to socket server */
        !            18:        int     to_ioctl = 1;                   /* used in ioctl call */
        !            19:        struct  sockaddr_in     addr;           /* address where socket server is */
        !            20:        char    hostname[BUFSIZ];               /* hostname */
        !            21:        struct  servent         *server;
        !            22:        struct  hostent         *myhost;
        !            23:        auto    int             len;
        !            24:        extern  int             errno;
        !            25: 
        !            26:        if ( (len = fork()) != 0 )
        !            27:        {
        !            28: # ifdef        DEBUG
        !            29:                printf("lock driver becomes %d\n",len);
        !            30: # endif        DEBUG
        !            31:                if ( len == -1 )
        !            32:                {
        !            33:                        perror("ingres lock driver, fork");
        !            34:                        exit(errno);
        !            35:                }
        !            36:                exit(0);
        !            37:        }
        !            38:        if ( (from_socket = socket(AF_INET,SOCK_STREAM,0)) == -1 )
        !            39:        {
        !            40: # ifdef        DEBUG
        !            41:                perror("INIT_S socket");
        !            42: # endif        DEBUG
        !            43:                exit(errno);
        !            44:        }
        !            45:        len = BUFSIZ;
        !            46:        gethostname(hostname,&len);
        !            47: 
        !            48:        if ( (server = getservbyname("ingreslock",(char *)0)) == 0 )
        !            49:                exit(errno);
        !            50: 
        !            51:        if ( (myhost = gethostbyname(hostname)) == 0 )
        !            52:                exit(errno);
        !            53:        bzero((char *) &addr,sizeof (addr));
        !            54:        bcopy(myhost->h_addr,(char *)&addr.sin_addr,myhost->h_length);
        !            55:        addr.sin_family = AF_INET;
        !            56:        addr.sin_port = server->s_port;
        !            57:        len = sizeof (addr);
        !            58:        if ( bind(from_socket,&addr,len) == -1 )
        !            59:        {
        !            60: # ifdef        DEBUG
        !            61:                perror("INIT_S bind, assuming driver already running");
        !            62: # endif        DEBUG
        !            63:                exit(0);
        !            64:        }
        !            65: 
        !            66:        if ( listen(from_socket,10) == -1 )
        !            67:        {
        !            68:                perror("Ingres lock, can't listen on port");
        !            69:                exit(errno);
        !            70:        }
        !            71:        ioctl(from_socket,FIONBIO,&to_ioctl);
        !            72:        return ( from_socket );
        !            73: }/* init_socket */

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