Article View: gnu.bash.bug
Article #1108Re: :${abc?abc} exits
From: ramsdell
Date: Fri, 05 Jan 1990 18:50
Date: Fri, 05 Jan 1990 18:50
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976 bytes
Opps! I forgot to say that I am using bash 1.04 with modifications so
that it runs on a NeXT computer. By the way, I like the idea of
having an interactive shell that is programmed as one programs the
shell invoked by the library routine named system.
>> Why did you type the ":" in front of everything? Maybe you meant
The ":" command evaluates its arguments and then ignores the results.
You can use it to make sure that a variable is defined as in:
:${DISPLAY?} # Exit with error when DISPLAY is not defined.
Cryptic, eh?
John
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From: ramsdell@LINUS.MITRE.ORG
Newsgroups: gnu.bash.bug
Subject: Re: :${abc?abc} exits
Message-ID: <9001051850.AA13039@huxley.mitre.org>
Date: 5 Jan 90 18:50:31 GMT
References: <9001051836.AA03895@sbphy.Ucsb.EDU>
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Distribution: gnu
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