From: Christoph Bussenius <busseniu@cip.physik.uni-muenchen.de>
To: linux-c-programming@vger.kernel.org
Cc: Linux C Programming <linux-c-programming@vger.kernel.org>
Subject: Re: stracing pwd
Date: Sat, 19 Jun 2004 18:13:02 +0200 [thread overview]
Message-ID: <20040619161302.GA31012@opaque> (raw)
In-Reply-To: <1087658980.8158.13.camel@mokona>
On Sat, Jun 19, 2004 at 10:29:40AM -0500, David Eduardo Gómez Noguera wrote:
> /usr/src/linux-2.6.7
> /usr/src/linux -> /usr/src/linux-2.6.7
>
> under /usr/src/linux,
> pwd prints /usr/src/linux
> pwd -L too
> pwd -P prints /usr/src/linux-2.6.7
> but an strace always shows the same
> write(1, "/usr/src/linux-2.6.7\n", 21/usr/src/linux-2.6.7
> ) = 21
> and it prints /usr/src/linux-2.6.7 to stdout no matter the parameter
> given to pwd.
>
> Anyone knows why that could happen?
> ( I haven't seen to the pwd code yet though)
The difference is that the first time you call pwd, you actually call
the shell builtin named pwd. The second time you call pwd, you call
/bin/pwd. The shell thinks you are where you have cd'd to, but in fact,
you are in /usr/src/linux-2.6.7. Just try typing /bin/pwd in the shell.
Cheers,
Christoph
--
``There's no dark side of the moon, really
Matter of fact, it's all dark''
--Pink Floyd
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prev parent reply other threads:[~2004-06-19 16:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-19 15:29 stracing pwd David Eduardo Gómez Noguera
2004-06-19 16:13 ` Christoph Bussenius [this message]
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