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Date: Sun, 6 Jun 2010 16:14:45 +0400
From: Andrey Chernov <ache@nagual.pp.ru>
To: Kostik Belousov <kostikbel@gmail.com>
Message-ID: <20100606121444.GA82819@nagual.pp.ru>
Mail-Followup-To: Andrey Chernov <ache@nagual.pp.ru>,
	Kostik Belousov <kostikbel@gmail.com>,
	Gabor Kovesdan <gabor@FreeBSD.ORG>, src-committers@FreeBSD.ORG,
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References: <201006061136.o56Ba9tr029717@svn.freebsd.org>
	<20100606120004.GH83316@deviant.kiev.zoral.com.ua>
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Cc: svn-src-head@FreeBSD.ORG, svn-src-all@FreeBSD.ORG,
	src-committers@FreeBSD.ORG, Gabor Kovesdan <gabor@FreeBSD.ORG>
Subject: Re: svn commit: r208868 - in head/usr.bin: bc dc
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On Sun, Jun 06, 2010 at 03:00:04PM +0300, Kostik Belousov wrote:
> On Sun, Jun 06, 2010 at 11:36:09AM +0000, Gabor Kovesdan wrote:
> > @@ -223,14 +222,11 @@ static const struct jump_entry jump_tabl
> >  	(sizeof(jump_table_data)/sizeof(jump_table_data[0]))
> > =20
> >  static void
> > -sighandler(int ignored)
> > +got_sigint(int ignored __unused)
> >  {
> > =20
> > -	switch (ignored)
> > -	{
> > -	default:
> > -		bmachine.interrupted =3D true;
> > -	}
> > +	putchar('\n');
> > +	exit(0);
> >  }
> In general, calling not async-signal safe functions from the signal
> handler is an invitation for undefined behaviour, that usually manifests
> itself as SIGSEGV and SIGBUS.

Yes, better use write(2) and _exit(2) here.

--=20
http://ache.pp.ru/

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