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From: tif@doorstop.austin.ibm.com (Paul Chamberlain)
Newsgroups: comp.unix.shell
Subject: Re: Using imbedded commands inside expr(1)
Message-ID: <4181@awdprime.UUCP>
Date: 9 Nov 90 16:44:34 GMT
References: <1462@eastman.UUCP>
Sender: news@awdprime.UUCP
Reply-To: tif@doorstop.austin.ibm.com (Paul Chamberlain)
Organization: IBM AWD, Austin, TX
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In article <1462@eastman.UUCP> gerwitz@kodak.com (Paul Gerwitz) writes:
>    test=`expr `tail +3 file` + 1` 

This works on my /bin/sh and my /bin/ksh:
	echo `expr \`expr 5 + 1\` + 3`
In fact so does this:
	echo `expr \`expr \\\`expr 2 + 3\\\` + 1\` + 3`

I didn't try it with tail or assigning it to a variable but it better
work just as well (I'm assuming that you have a 3 line file, personally
I'd use "tail -1" instead).

Anybody know why the same thing fails on csh?

Paul Chamberlain | I do NOT represent IBM.     tif@doorstop, sc30661 at ausvm6
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