behaviour of "for (( exp1; exp2; exp3 )); do COMMANDS; done"

Wed May 28 12:54:00 GMT 2003

Sam Edge <sam.edgeZZZ@lineone.net> writes:
> Stuart Brady <stuart@convex.org.uk> wrote in
> <20030527120718.GA22030@convex.org.uk>
> in gmane.os.cygwin on 2003年5月27日 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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