Path: utzoo!mnetor!uunet!seismo!esosun!cogen!alen
From: alen@cogen.UUCP (Alen Shapiro)
Newsgroups: comp.unix.wizards
Subject: Re: Building Variable Names in Bourne Shell
Message-ID: <430@cogen.UUCP>
Date: 23 Mar 88 22:47:41 GMT
References: <12565@brl-adm.ARPA>
Reply-To: alen@cogen.UUCP (Alen Shapiro)
Organization: Cogensys, LaJolla, Calf.
Lines: 55

In article <12565@brl-adm.ARPA> kevinc@bearcat.lim.tek.com (Kevin Cosgrove 627-5212) writes:
>Anyone know how to build *accessible* variable names on the fly in Bourne
>shell?  Below is a do nothing script which, I hope, demonstrates what I
>want to do.
>
>#!/bin/sh
>onestring="A"			# set the values of arbitrary strings
>twostring="B"
>threestring="C"
>for string in one two three	# loop thru string sets
>do
>   var="${string}string"	# var contains the name of the string
>				# I wish to get access to
>
>   echo "\$$var = ${var}"	# how do I get the contents of the string
>				# "pointed to" by var?
>   echo
>done
>
>Yes, I know there are lots of other shells and/or languages which make
>the above easy to do, but I'm trying to patch existing scripts, and this
>would make it much easier to do.


Nice exercise - try this. BTW /bin/calendar is a GREAT crib sheet for 
such things 
 
#!/bin/sh 
onestring="A"
twostring="B"
threestring="C"
for string in one two three
do
    var="a=\$${string}string"
    eval $var
    echo ${string}string = $a
done
 
--alen the Lisa slayer (it's a long story)

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