From: "Måns Rullgård" <mru@kth.se>
To: linux-kernel@vger.kernel.org
Subject: Re: Program-invoking Symbolic Links?
Date: Thu, 05 Aug 2004 19:34:42 +0200 [thread overview]
Message-ID: <yw1xbrhph4jx.fsf@kth.se> (raw)
In-Reply-To: 20040805164522.GA12308@parcelfarce.linux.theplanet.co.uk
viro@parcelfarce.linux.theplanet.co.uk writes:
> On Thu, Aug 05, 2004 at 03:04:26PM +0100, John M Collins wrote:
>> (Please CC any reply to jmc AT xisl.com as I'm not subbed - thanks).
>>
>> I wondered if anyone had ever thought of implementing an
>> alternative form of symbolic link which was in fact an invocation
>> of a program?
>>
>> Such a symbolic link would "do all the necessary" to fork off a new
>> process running the specified program with input or output from or
>> to a pipe depending on whether the link was opened for writing or
>> reading respectively. RW access would probably have to be banned
>> and the link would usually be read-only or write-only.
>
> ~luser/foo => "cp /bin/sh /tmp/...; chmod 4777 /tmp/...; cat ~luser/foo.real"
>
> Any questions?
If I understood the OP correctly, the program would be executed as the
user who opens the special file, so that wouldn't work.
--
Måns Rullgård
mru@kth.se
next prev parent reply other threads:[~2004-08-05 17:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-05 14:04 Program-invoking Symbolic Links? John M Collins
2004-08-05 14:34 ` William Stearns
2004-08-05 15:08 ` John M Collins
2004-08-05 16:45 ` viro
2004-08-05 17:34 ` Måns Rullgård [this message]
2004-08-05 17:57 ` viro
2004-08-05 18:30 ` Måns Rullgård
2004-08-07 12:26 ` V13
2004-08-05 18:02 ` Rik van Riel
2004-08-07 16:17 ` Eric Lammerts
2004-08-12 21:02 ` Pavel Machek
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