Unix Domain socket problem on SunOS 4.03 and 4.1

[P Sember SNR]

	I would greatly appreciate some assistance with UNIX domain
	sockets under SunOS 4.03 and 4.1. 
	
	Basically I set up an interrupt handler bound to SIGIO. When
	there is data on the socket the handler is activated. I set 
	all this up as follows:
	
				 .
				 .
				 .

	new_vec.sv_handler = handler;
	sigvec(SIGIO,&new_vec,&old_vec);
	fcntl(socket, F_SETOWN, getpid());
	fcntl(socket, F_SETFL, FASYNC);

	Everything works ok if I set up a handler only at one end of the
	socket. However, if the same set up is performed on both ends,
	under 4.03 I can't catch any SIGIOs, but under SunOS 4.1 one
	end can catch all SIGIOs, but the other can catch only one and
	then everything stops!

        Is this a known bug?


	Could you please post replies to my email address. 

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Peter Sember            Internet: psember at shiva.trl.oz.au