From mboxrd@z Thu Jan  1 00:00:00 1970
From: dnied@tiscali.it (Dario Niedermann)
Date: Sat, 10 Sep 2016 19:45:55 +0200
Subject: [TUHS] Shell control through external commands
In-Reply-To: <1473527216.2633960.721672049.702FC02A@webmail.messagingengine.com>
References: <1468585644.26769.for-standards-violators@oclsc.org>
 <20160910074508.GE5970@dnied%tiscali.it>
 <20160910091307.GE14636@yeono.kjorling.se>
 <1473527216.2633960.721672049.702FC02A@webmail.messagingengine.com>
Message-ID: <20160910174555.GG5970@dnied%tiscali.it>

Il 10/09/2016 alle 11:41, Joerg Schilling ha scritto:

> POSIX requires some commands to be callable via exec().


Il 10/09/2016 alle 19:06, Random832 ha scritto:

> something that is technically required by POSIX. There is a general
> requirement that "regular builtin" commands [with no exception for cd]
> "shall be implemented in a manner so that they can be accessed via the
> exec family of functions as defined in the System Interfaces volume of
> POSIX.1-2008 and can be invoked directly by those standard utilities
> that require it (env, find, nice, nohup, time, xargs)."


TIL! Still, it seems to me that there is no way the `cd' script can
actually accomplish anything, even when called by exec().