Date: Sun, 6 Apr 2008 15:16:20 -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: <20080406221620.GA73124@eos.sc1.parodius.com> In-Reply-To: <E7DB28B4-97B5-4B00-8A36-152392934F14@lafn.org> References: <1794897B-7A36-412A-8849-87F10268EBAE@lafn.org> <20080406214524.GA72199@eos.sc1.parodius.com> <E7DB28B4-97B5-4B00-8A36-152392934F14@lafn.org>
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On Sun, Apr 06, 2008 at 03:02:44PM -0700, Doug Hardie wrote: > On Apr 6, 2008, at 14:45, 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 > > Did that prior to my original posting. I find nothing there on it. The manpage change is documented in revision 1.27. See my other mail documenting proof that the manpages do in fact document the change: http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/libc/stdlib/getenv.3 Using that commit message as a cross-reference, we can correlate the commit in getenv.c -- revision 1.9: http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/libc/stdlib/getenv.c http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/libc/stdlib/getenv.c.diff?r1=1.8;r2=1.9;f=h -- | 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 |
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