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From: tom@flood.com (Tom Chatt)
Newsgroups: comp.unix.internals
Subject: Re: sigblock,sigmask,sigsetmask ... for SYS V?
Message-ID: <1991Jun25.165700.17625@flood.com>
Date: 25 Jun 91 16:57:00 GMT
Article-I.D.: flood.1991Jun25.165700.17625
References: <1991Jun21.225851.24990@uokmax.ecn.uoknor.edu> <srp.677620585@babar.mmwb.ucsf.edu>
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srp@babar.mmwb.ucsf.edu (Scott R. Presnell%Cohen) writes:
> hpn@regentdb.osrhe.uoknor.edu (Huy Nguyen / (405) 721-3798) writes:
> 
> > Does anyone know of a library package, hacks, etc to emulate these BSD
> > signal routines for SYS V?  
> 
> I've used the following in the past as a quick hack...
>  [ code snippets emulating sigblock, sigsetmask enclosed ]

Yes, but the important question is: can you emulate sigpause?
The sigpause(2) call, which *atomically* waits for signals on
a provided signal mask, is essential to properly avoid the
critical races otherwise inherent in managing signals.
-- 
Tom Chatt                        \   Don't take offense, take action.
Internet: tom@flood.com           \    Speak up. When we remain silent,
UUCP: ...!uunet!flood!tom        / \     we oppress ourselves.