Date: Sun, 6 Apr 2008 14:52:37 -0700 From: Jeremy Chadwick <koitsu@freebsd.org> To: Doug Hardie <bc979@lafn.org> Cc: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: getenv in FreeBSD 7 Message-ID: <20080406215237.GA72336@eos.sc1.parodius.com> In-Reply-To: <20080406214524.GA72199@eos.sc1.parodius.com> References: <1794897B-7A36-412A-8849-87F10268EBAE@lafn.org> <20080406214524.GA72199@eos.sc1.parodius.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, Apr 06, 2008 at 02:45:24PM -0700, Jeremy Chadwick wrote: > On Sun, Apr 06, 2008 at 02:37:06PM -0700, Doug Hardie wrote: > > Somewhere between FreeBSD 6.2 and 7.0 getenv has been changed to return a > > null if an environment variable is set but has no value. I don't find > > anything anywhere in the documentation/man pages on this. As a result, you > > cannot distinguish between a variable that is not set and one that is set > > to a value of "". Is this a bug or a feature change? > > I'd begin peeking here: > > http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/libc/stdlib/getenv.c Follow-up: the manpages between 6.3-PRERELEASE and 7.0-STABLE do document said change: http://www.freebsd.org/cgi/man.cgi?query=getenv&apropos=0&sektion=3&manpath=FreeBSD+6.3-RELEASE&format=html http://www.freebsd.org/cgi/man.cgi?query=getenv&apropos=0&sektion=3&manpath=FreeBSD+7.0-stable&format=html -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20080406215237.GA72336>