Message-ID: <4D93C4B7.1070505@laposte.net>
Date: Thu, 31 Mar 2011 02:03:03 +0200
From: Cyrille Lefevre <cyrille.lefevre-lists@laposte.net>
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Subject: Re: [ANNOUNCEMENT] Updated base-files-4.0-6
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Le 31/03/2011 01:53, Cyrille Lefevre a =E9crit :
>
>
> Le 18/03/2011 19:45, David Sastre a =E9crit :
>> Version 4.0-6 of base-files has been uploaded.
>>
>> Base-files is a set of system configuration and setup files.

Hi,

PS1 *must not* be exported.

historically, it is not exported to know if it is a shell is interactive=20
or not since only interactive shells set it.

i.e., the following both solutions are equivalent.

case $- in *i*) interactive ;; esac
[ -n $PS1 ] && interactive

if PS1 is exported, it is always set for subshells and this may cause=20
trouble in some script.

also, from man bash :

An  interactive  shell  is one started without non-option arguments and
without the -c option whose standard input and error are both connected
to  terminals  (as determined by isatty(3)), or one started with the -i
option.  PS1 is set and $- includes i if bash is interactive,  allowing
a shell script or a startup file to test this state.

Regards,

Cyrille Lefevre
--=20
mailto:Cyrille.Lefevre-lists@laposte.net


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