Path: utzoo!attcan!uunet!virtech!cpcahil
From: cpcahil@virtech.uucp (Conor P. Cahill)
Newsgroups: comp.lang.c
Subject: Re: Catching Signals in 'C'
Message-ID: <1990Sep28.232736.24296@virtech.uucp>
Date: 28 Sep 90 23:27:36 GMT
References: <1990Sep28.120043.17628@NCoast.ORG> <2901@idunno.Princeton.EDU>
Reply-To: cpcahil@virtech.UUCP (Conor P. Cahill)
Organization: Virtual Technologies Inc., Sterling VA
Lines: 17

In article <2901@idunno.Princeton.EDU> pfalstad@bow.Princeton.EDU (Paul John Falstad) writes:
>
>The signal handler should reinstall itself before returning. 

Actually the signal handler should reinstall itself immediatly (i.e. the first
thing it does) otherwise the receipt during the execution of the handler may
cause grief.  Even doing it as the first thing in the handler may not be
fast enough to ensure that another signal does not interrupt the program.  

That is why old System V signals should not be used for interprocess 
communications unless the rate of signals is guarranteed to be low.


-- 
Conor P. Cahill            (703)430-9247        Virtual Technologies, Inc.,
uunet!virtech!cpcahil                           46030 Manekin Plaza, Suite 160
                                                Sterling, VA 22170