Date: Mon, 28 Jan 2013 20:17:13 -0500 From: Fbsd8 <fbsd8@a1poweruser.com> To: kpneal@pobox.com Cc: FreeBSD questions <questions@freebsd.org> Subject: Re: sh & export Message-ID: <51072319.7020102@a1poweruser.com> In-Reply-To: <20130129011118.GA71113@neutralgood.org> References: <51070FD6.8070808@a1poweruser.com> <444ni0dewi.fsf@lowell-desk.lan> <51071ABF.1020603@a1poweruser.com> <20130129011118.GA71113@neutralgood.org>
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kpneal@pobox.com wrote:
> On Mon, Jan 28, 2013 at 07:41:35PM -0500, Fbsd8 wrote:
>> This is what I am looking at in a sh script
>>
>> echo export jail_${jailname}_hostname=\"${jailname}\"
>> puts it into the env
>> and this brings it back out
>> eval jailname=\"\$jail_${jailname}_hostname\"
>>
>> Question is how can I display from the console command
>> line what has been exported?
>>
>> env issued on the console command line does not show
>> any thing named jail.
>
> Environment variables are only exported to children of the shell that
> created or inherited them. When you run a script you normally have your
> command line shell start a child shell which then executes the script.
> When the child shell that runs the script finishes the script it ends and
> control returns to the parent. The child's environment at this point is
> gone, but the parent couldn't have looked at it anyway. Parents don't
> really know what their children are doing.
>
> So, to answer your question above, "You can't display from the console
> what was set in a script."
OK then from within a script what single command would show everything?
I tested with a script with only the env command and did not get any
thing more than issuing env from the console command line.
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