Re: How to expand variables from string?

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#13

From: William Pursell
Date: Mon, 29 Oct 2007 05:57

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On 17 Oct, 03:24, Olivier Langlois <olangl...@sympatico.ca> wrote:
>
> First, sorry if I am cross-posting this question. I am not sure to
> understand the difference between the 2 newsgroups.

Unaware of the existence of alt.comp.lang.shell.unix.bourne-bash,
I am grateful to you for exposing me to it.  (Or it to me, rather.)

> My problem is that I have a shell variable containing a string
> composed of variable names preceded with the expension operator ('$')
> and I am fighting with the shell to find a way to make the expension.

eval is your friend:

$ FOO="foo's text"
$ BAR='$FOO'
$ echo $BAR
$FOO
$ eval echo $BAR
foo's text

(Perhaps I should have used a character other than '$' for my
prompt...)

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From:  William Pursell <bill.pursell@gmail.com>
Newsgroups: alt.comp.lang.shell.unix.bourne-bash,gnu.bash
Subject: Re: How to expand variables from string?
Date: Sun, 28 Oct 2007 22:57:22 -0700
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