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Date: Sun, 2 Jun 2013 23:22:09 +0200
From: Jilles Tjoelker <jilles@stack.nl>
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
Subject: Re: svn commit: r251197 - head/lib/libc/sys
Message-ID: <20130602212209.GA44549@stack.nl>
References: <201305312131.r4VLVcd5074132@svn.freebsd.org>
 <20130531233109.GD1387@garage.freebsd.pl>
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On Sat, Jun 01, 2013 at 01:31:10AM +0200, Pawel Jakub Dawidek wrote:
> On Fri, May 31, 2013 at 09:31:38PM +0000, Jilles Tjoelker wrote:
> > Author: jilles
> > Date: Fri May 31 21:31:38 2013
> > New Revision: 251197
> > URL: http://svnweb.freebsd.org/changeset/base/251197

> > Log:
> >   sigaction(2): *at system calls are async-signal safe.

> Isn't chflags(2) family safe as well?

There are many more non-POSIX functions that are async-signal safe. For
example:

* bindat()/connectat() (like bind()/connect())
* eaccess() (like faccessat())
* pipe2() (like pipe())
* accept4() (like accept())
* wait4() (like waitpid())
* futimesat() (like utimes())
* strsep() (like strtok_r())

We may not want to document them all as async-signal safe because it may
be necessary later to implement some as async-signal unsafe library
functions. However, it would be useful to document some of them as
async-signal safe.

-- 
Jilles Tjoelker