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Subject: Re: behaviour of "for (( exp1; exp2; exp3 )); do COMMANDS; done"
References: <002901c32427$2e1553e0$78d96f83 AT pomello>
	<PHENJGDFMJPEBOBLGEMOKENMCBAA DOT peter DOT oosterlynck AT oracle DOT com>
	<ocj6dvc16hc7e702hhe1dktohpm1306oi6 AT 4ax DOT com>
	<20030527120718 DOT GA22030 AT convex DOT org DOT uk>
	<eq29dvgfdunpptfj4ak084g2lfa22as6m1 AT 4ax DOT com>
From: Harald DOT Maier DOT BW AT t-online DOT de (Harald Maier)
Reply-To: Harald Maier <maierh AT myself DOT com>
Date: Wed, 28 May 2003 13:28:43 +0200
In-Reply-To: <eq29dvgfdunpptfj4ak084g2lfa22as6m1@4ax.com> (Sam Edge's
 message of "Wed, 28 May 2003 11:17:02 +0100")
Message-ID: <m3brxn1f9w.fsf@ate.maierh>
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Sam Edge <sam DOT edgeZZZ AT lineone DOT net> writes:

> Stuart Brady <stuart AT convex DOT org DOT uk> wrote in
> <20030527120718 DOT GA22030 AT convex DOT org DOT uk>
> in gmane.os.cygwin on Tue, 27 May 2003 13:07:18 +0100:
>
>> On Tue, May 27, 2003 at 12:42:21PM +0100, Sam Edge wrote:
>> > Make sure that if your script uses Bash-specific features, it starts
>> > with #!/bin/bash and not with #!/bin/sh. That way it'll work anywhere.
>> 
>> You've made the assumption that bash is always in /bin. I've seen it
>> in /bin, /usr/bin, /usr/local/bin, /usr/contrib/bin, and /opt/bash/bin.
>> ~/bin would be another likely place for it.
>
> I just _knew_ I shouldn't have said "anywhere." ;-)
>
> Unfortunately this is a general weakness in the "#!/xxxx" syntax.
>
> (OT) Does anyone know if any of the common shells, when they see
> "#!/bin/xxxx" at the front of a script, try a $PATH search for an
> "xxxx" executable if they can't find "/bin/xxxx"? This would seem like
> a good idea to me.

Some people are using the env program to use the PATH environment:

#! /usr/bin/env perl
BEGIN { $^W = 1 }

Harald


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