Very Computer

At the moment we have a simple CLIENT/SERVER model where
the communication is done using DATAGRAM sockets in the INET domain
with INTERRUPTS which works successfully.

The same exercise in the UNIX  domain has not been sucessful.
A skeleton code is supplied to clarify (hopefully)

/*  SERVER */
struct sockaddr_un sock;
fd=socket(AF_UNIX,SOCK_DGRAM,0);  /*create a socket */
bind(fd,&sock,sizeof(sock.sun_family)+1+strlen(sokname))
                                  /*binding tjhe socket */
icotl(fd,FIOASYNC,(char*)&fioasync) /* setting flag for async I/O */
icotl(fd,SIOCSPGRP,(char*)&pid)     /* set process group pid for signal  */
signal(SIGIO,sig_handler)
sigpause(SIGIO)
.
.
/* END SERVER */

/*  CLIENT */
struct sockaddr_un sock;
fd=socket(AF_UNIX,SOCK_DGRAM,0);  /*create a socket */
bind(fd,&sock,sizeof(sock.sun_family)+1+strlen(sokname))
                                  /*binding the socket */
icotl(fd,FIOASYNC,(char*)&fioasync) /* setting flag for async I/O */
icotl(fd,SIOCSPGRP,(char*)&pid)     /* set process group pid for signal  */
signal(SIGIO,sig_handler)
.
.
sendto(fd,...)               /*sendto SERVER */
.
.
.
sigpause(SIGIO)
.
/* END CLIENT */

sig_handler() performs recvfrom for the CLIENT  and
              recvfrom & sendto for the SERVER.

We would like to hear from people who have had similar experiance
or success!!
--
Regards

Quote:> /*  SERVER */
> struct sockaddr_un sock;
> fd=socket(AF_UNIX,SOCK_DGRAM,0);  /*create a socket */
> bind(fd,&sock,sizeof(sock.sun_family)+1+strlen(sokname))
>                              /*binding tjhe socket */
> icotl(fd,FIOASYNC,(char*)&fioasync) /* setting flag for async I/O */
> icotl(fd,SIOCSPGRP,(char*)&pid)     /* set process group pid for signal  */

    int pgrp = -getpid();

    (void) signal(_WHICH_INTERRUPT,urgent_message_processor);
    (void) ioctl(port,SIOCSPGRP, (char *) &pgrp);

Quote:> signal(SIGIO,sig_handler)
> sigpause(SIGIO)
> .
> .
> /* END SERVER */

> /*  CLIENT */
> struct sockaddr_un sock;
> fd=socket(AF_UNIX,SOCK_DGRAM,0);  /*create a socket */
> bind(fd,&sock,sizeof(sock.sun_family)+1+strlen(sokname))
>                              /*binding the socket */
> icotl(fd,FIOASYNC,(char*)&fioasync) /* setting flag for async I/O */
> icotl(fd,SIOCSPGRP,(char*)&pid)     /* set process group pid for signal  */

Quote:> signal(SIGIO,sig_handler)
> .
> .
> sendto(fd,...)               /*sendto SERVER */
> .
> .
> .
> sigpause(SIGIO)
> .
> /* END CLIENT */

> sig_handler() performs recvfrom for the CLIENT  and
>          recvfrom & sendto for the SERVER.

                                        Eddie Wyatt