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To: rc@archone.tamu.edu
Subject: Re: an improvement(?) suggestion and a question
Message-Id: <9203191325.AA02380@ibmpcug.co.uk>
Date: Thu, 19 Mar 1992 07:25:09 -0600
From: Matthew Farwell <dylan@ibmpcug.co.uk>


In article <9203191254.AA02417@dahlie.techfak.uni-bielefeld.de> malte@techfak.uni-bielefeld.de writes:
>in rc's man page it says that $0 is set to name of the function during its
>execution, so a naive thought came to my mind:
>
>	fn sighup sigint {
>		echo $progname was killed by $0 | mail somebody
>		exit 2
>	}
>
>But this does not work since $0 when catching a signal is the name of
>of the function rc was currently working on.
>
>To change this, I have two suggestions:
>	1) Change the signal handler to place the signals name in $0
>	   and allow $* to be referenced with negative indices, with
>	   $*(-1) evaluating to the name of the function the present
>	   function was called from, $*(-2) ...
>
>This is a more general solution, or
>
>	2) Introduce a new special variable $signal which evaluates to
>	   the name of the most current signal, so that the above example
>	   will read
>		...
>		echo $progname was killed by $signal | mail somebody
>		...

Or set $1 inside a signal handler to the name of the signal sent to the
function, ie

fn sigint sighup {
	echo $0 killed by signal $1
}

Dylan.

-- 
re-invented wheels are often square -- Henry Spencer