Date: Tue, 12 Feb 2013 15:14:37 +0000 From: "Teske, Devin" <Devin.Teske@fisglobal.com> To: "tundra@tundraware.com" <tundra@tundraware.com>, FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: RE: Was I Sourced? Message-ID: <13CA24D6AB415D428143D44749F57D7201EA755A@ltcfiswmsgmb21> In-Reply-To: <511A5771.9020208@tundraware.com> References: <511A5771.9020208@tundraware.com>
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On Tue, 12 Feb 2013, Tim Daneliuk wrote: > Is there a way for script to determine whether is was sourced > or forked off as a subprocess when it was invoked? >=20 Not that I'm aware of. > 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. >=20 In order for a user to exec a script it has to have the invocation line: #!/bin/sh So naturally, if your script is missing this as the first line, the file wi= ll not be interpretable (and thus exec will fail). And if the file is not e= xecutable (due to lack of invocation line) then you also shouldn't have any= worry about execution within a sub-shell (though it will still be possible= to "source" within a sub-shell using "." -- but that shouldn't be any diff= erent than sourcing in the main shell). One thin you could do is to use an invocation line that will warn the user = that it shouldn't be executed directly... #!/not_directly_executable # Use the source luke So when someone executes your script they get... -bash: ./script: /not_directly_executable: bad interpreter: No such file or= directory --=20 Devin _____________ The information contained in this message is proprietary and/or confidentia= l. If you are not the intended recipient, please: (i) delete the message an= d all copies; (ii) do not disclose, distribute or use the message in any ma= nner; and (iii) notify the sender immediately. In addition, please be aware= that any message addressed to our domain is subject to archiving and revie= w by persons other than the intended recipient. Thank you.
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