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From: meissner@xyzzy.UUCP (Michael Meissner)
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  HELP: select() under sockets
Message-ID: <267@xyzzy.UUCP>
Date: Mon, 21-Sep-87 11:17:25 EDT
Article-I.D.: xyzzy.267
Posted: Mon Sep 21 11:17:25 1987
Date-Received: Tue, 22-Sep-87 04:24:51 EDT
References: <8709091653.AA15944@topaz.rutgers.edu>
Reply-To: meissner@xyzzy.UUCP (Michael Meissner)
Organization: Data General (Languages @ Research Triangle Park, NC.)
Lines: 16

In article <8709091653.AA15944@topaz.rutgers.edu> ron@topaz.rutgers.EDU (Ron Natalie) writes:
> The other arguments to select are pointers to bit fields so assumably
> 
> char	buf[10];
> 
> 	select(80, buf, (char *) 0, (char *) 0, (char *) 0, (time_t) 0)
> 

In 4.2 systems the three pointer arguments are pointers to INT's, not char's.
In 4.3 this was changed to be the type fd_set (declared in sys/types.h), which
is a structure big enough to hold 256 file descriptors, with a way to expand
it further.  In no case is a character array used.  This may be seen as picking
nits, but it becomes important on machines that have different representations
for pointers to char's and other pointers.
-- 
Michael Meissner, Data General.		Uucp: ...!mcnc!rti!xyzzy!meissner
					Arpa/Csnet:  meissner@dg-rtp.DG.COM