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Re: Reentrant argp

From: M. Gerards
Subject: Re: Reentrant argp
Date: Tue, 20 May 2003 09:59:43 +0200
User-agent: Internet Messaging Program (IMP) 3.1

> "M. Gerards" <> writes:
> > For the screensaver patch I sent yesterday to bug-hurd I assumed argp is 
> > reentrant. Is this really the case for GNU/Hurd? It is for GNU/Linux, but
> I'm 
> > not sure yet about GNU/Hurd.
> argp uses getopt. getopt uses global variables to keep state. And as
> far as I know getopt doesn't use tricks like thread local storage.
> So it's not reentrant.

There is some comment about this in glibc, IIRC a lock is used for getopt. So I 
wonder if this locking also works for the Hurd (Marcus had doubts, I cannot 
remember the details).
> My hacked argp,
> doesn't depend on getopt, and doesn't use global variables.

Ahh, interesting. Have you sent a patch to the glibc mailinglist? This would be 
_really_ usefull for me :)


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