Date: Tue, 12 Feb 2013 11:10:47 -0600 (CST) From: Robert Bonomi <bonomi@mail.r-bonomi.com> To: tundra@tundraware.com Cc: freebsd-questions@freebsd.org Subject: Re: Was I Sourced? Message-ID: <201302121710.r1CHAlNh028236@mail.r-bonomi.com> In-Reply-To: <511A5771.9020208@tundraware.com>
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> Date: Tue, 12 Feb 2013 08:53:37 -0600
> From: Tim Daneliuk <tundra@tundraware.com>
> To: FreeBSD Mailing List <freebsd-questions@freebsd.org>
> Subject: Was I Sourced?
>
> Is there a way for script to determine whether is was sourced
> or forked off as a subprocess when it was invoked?
>
> I have a script that needs to be sourced to work properly and
> I want to warn the luser if they exec or subshell it instead.
a 'sourced' script does -not- honor a shebag line.
you can exploit that.
The executable script /usr/local/bin/source_only;
#!/bin/sh
echo Error: this script must be sourced
Your script:
#!/usr/local/bin/source_only
{cmd}
{cmd}
{cmd}
{cmd}
{cmd}
{cmd}
...
...
Trying to do it totally self-contained is not easy.
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