Date: Tue, 12 Feb 2013 12:41:48 -0600 From: Tim Daneliuk <tundra@tundraware.com> To: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: Was I Sourced? Message-ID: <511A8CEC.3060007@tundraware.com> In-Reply-To: <201302121710.r1CHAlNh028236@mail.r-bonomi.com> References: <201302121710.r1CHAlNh028236@mail.r-bonomi.com>
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On 02/12/2013 11:10 AM, Robert Bonomi wrote:
>> 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.
>
>
Actually, it's not that hard. Setting the shebang line to this does
the trick:
#!/bin/echo "This Script Must Be Sourced!!!!"
Thanks to all who replied on this one ...
--
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Tim Daneliuk
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