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From: Wolfram Schneider <wosch@cs.tu-berlin.de>
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Date: Mon, 14 Aug 1995 17:57:01 +0200
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To: Garrett Wollman <wollman@halloran-eldar.lcs.mit.edu>
Cc: FreeBSD-bugs@freebsd.org
Subject: bin/683: cron(8)
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Garrett Wollman writes:
>You missed the point.  It is none of cron's business to be parsing
>shell command lines, period.
>
>What should cron do with this:
>
>------------------------------------
>SHELL=/usr/site/bin/bash
>30 4 1 * * help
>------------------------------------
>
>Or how about this:
>
>------------------------------------
>SHELL=/usr/local/bin/foosh
>15 0 * * */2 grimblepritz garply foobiebletch
>------------------------------------
>(where in the `foosh' language, `garply' means the same as `>' in
>Bourne shell)
>
>You are putting knowledge into utility programs which have no business
>applying them; this is simply the Wrong Thing.

Ok, ok. Add a check for $SHELL (/bin/sh or /bin/csh). 

Carefully users don't put shell builtin's into crontab or uses funny
shells (grimblepritz, emacs, perl etc.)

Wolfram