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Date: Mon, 20 Oct 1997 17:59:17 -0700 (PDT)
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From: Donald Burr <dburr@POBoxes.com>
To: questions@FreeBSD.ORG
Subject: RE: questions-digest V3 #489
Cc: jcwells@u.washington.edu
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My secret spy satellite informs me that on 20-Oct-97,
owner-questions-digest@FreeBSD.ORG wrote:

>From: Jason Wells <jcwells@u.washington.edu>
>Date: Mon, 20 Oct 1997 20:44:50 +0000
>Subject: Force a script to use shell foo
>
>Lets say I run a script from cron. There is no shell to inherit. The
>script
>would use /bin/sh. But silly me, I wrote my program to use bash.
>
>Is it sufficient to just enter the command /usr/local/bin/bash within the
>script to get the script to use bash? If not, how do I set up an
>environment for a program?

The proper way of doing this is to include the following line as the VERY
FIRST LINE In your script:

#!/path/to/shell

For example, to run a shell script using tcsh, which is located in
/usr/local/bin, you would place:

#!/usr/local/bin/tcsh

as the first line.

Note that you can also use this with other types of interpreted languages,
e.g. PERL.  if you have a PERL script you want to be able to execute by
just giving its name (to be able to type "foo" instead of "perl foo" at
the cmdline), add

#!/usr/local/bin/perl

(or /usr/bin/perl, etc.) as its first line.

Be sure the file is executable!  (chmod +x filename)

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