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From: mouse@mcgill-vision.UUCP
Newsgroups: comp.unix.questions
Subject: Re: Why does this shell program run under csh????
Message-ID: <800@mcgill-vision.UUCP>
Date: Sun, 7-Jun-87 04:40:07 EDT
Article-I.D.: mcgill-v.800
Posted: Sun Jun  7 04:40:07 1987
Date-Received: Sat, 13-Jun-87 11:26:52 EDT
References: <243@kosman.UUCP>
Organization: McGill University, Montreal
Lines: 30

In article <243@kosman.UUCP>, kevin@kosman.UUCP (Kevin O'Gorman) writes:
> I am running Ultrix 1.2A (a Berkely type thing) and have written two
> shell programs [which] are almost identical, the exceptions being one
> argument to dump(8) and some commentary.  [...] a read command []
> works in one (daily) and fails in the other (monthly), with a message
> something like
> 	read: not found
> which makes me think that daily runs under /bin/sh (which has 'read'
> builtin), and that monthly runs under /bin/csh (which gives the exact
> same error message).

"some commentary" - are you aware of the #! convention?  If a shell
script's first two bytes (ie, the first two bytes of the first line)
are #! then the rest of the line is taken to indicate what shell is to
be used to run the script.  For example, if one says

#! /bin/sh

and the other says

#! /bin/csh

then that explains it.

Failing that, check out how they are run.  Is one run via "sh .../daily"
and the other via "csh .../monthly" or something?

					der Mouse

				(mouse@mcgill-vision.uucp)