Re: kern/44950: fcntl(F_MAXFD) returns bogus values

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

The following reply was made to PR kern/44950; it has been noted by GNATS.

From: Jukka Ruohonen <jruohonen%iki.fi@localhost>
To: Martin Husemann <martin%duskware.de@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, Julio Merino <jmmv%julipedia.org@localhost>
Subject: Re: kern/44950: fcntl(F_MAXFD) returns bogus values
Date: Wed, 11 May 2011 11:05:20 +0300

 On Wed, May 11, 2011 at 09:58:18AM +0200, Martin Husemann wrote:
 > On Wed, May 11, 2011 at 10:55:08AM +0300, Jukka Ruohonen wrote:
 > >            for (i = 0; i < 1024; i++)
 > >                    (void)close(i);
 > > 
 > >            _exit(fcntl(0, F_MAXFD));
 > 
 > You have done close(0) and now can't fcntl(0, ...). We could make an 
 > exception
 > for F_MAXFD in the kernel (but check the standard carefully first).
 
 Of course, WEXITSTATUS(-1) == 255. As far as I know, F_MAXFD is NetBSD
 specific and there has never been a consistent/standard way to obtain the
 number of open descriptors.
 
 - Jukka.