From: Andreas Schwab <schwab@linux-m68k.org>
To: Junio C Hamano <gitster@pobox.com>
Cc: Conley Owens <cco3@android.com>, Jeff King <peff@peff.net>,
git@vger.kernel.org
Subject: Re: [PATCH] Fallback on getpwuid if envar HOME is unset
Date: Tue, 21 Aug 2012 20:41:59 +0200 [thread overview]
Message-ID: <m2harwccjs.fsf@igel.home> (raw)
In-Reply-To: <7vzk5ocdg7.fsf@alter.siamese.dyndns.org> (Junio C. Hamano's message of "Tue, 21 Aug 2012 11:22:32 -0700")
Junio C Hamano <gitster@pobox.com> writes:
> Where do shells (e.g. bash and dash) go when you say "cd" without
> parameter when $HOME is unset, for example?
$ bash -c 'unset HOME; cd'
bash: line 0: cd: HOME not set
$ dash -c 'unset HOME; cd'
[no output and cwd not changed]
POSIX says:
If no directory operand is given and the HOME environment variable
is empty or undefined, the default behavior is
implementation-defined and no further steps shall be taken.
Another data point: bash falls back to getpwuid when expanding ~, dash
leaves it alone. (POSIX makes it unspecified.)
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2012-08-21 18:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-21 1:28 [PATCH] Fallback on getpwuid if envar HOME is unset Conley Owens
2012-08-21 2:30 ` Jeff King
2012-08-21 17:18 ` Conley Owens
2012-08-21 18:22 ` Junio C Hamano
2012-08-21 18:33 ` Conley Owens
2012-08-21 19:22 ` Junio C Hamano
2012-08-21 19:40 ` Jeff King
2012-08-21 18:41 ` Andreas Schwab [this message]
2012-08-21 3:54 ` Junio C Hamano
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