On Thu, 7 Jul 2005, Ian Macdonald wrote:
On Thu 07 Jul 2005 at 20:07:33 -0400, you wrote:
On Thu, 7 Jul 2005, Ian Macdonald wrote:
Hello,
This doesn't seem right:
[EMAIL PROTECTED] bash_completion]$ foo=x
[EMAIL PROTECTED] bash_completion]$ foo=bar
[EMAIL PROTECTED] bash_completion]$ readonly foo
[EMAIL PROTECTED] bash_completion]$ foo=bar >/dev/null
bash: foo: readonly variable
[EMAIL PROTECTED] bash_completion]$ foo=bar 2>/dev/null
bash: foo: readonly variable
[EMAIL PROTECTED] bash_completion]$ foo=bar &>/dev/null
bash: foo: readonly variable
What are you tring to redirect? There is no output from your
command; it is only an assignment to a read-only variable (which is
naturally going to fail).
I'm trying to redirect the error, because I have a read-only variable
that may have attempts made to redefine it. I want those to silently
fail.
You could define a function:
assign()
{
case $(declare -p $1 2>/dev/null) in
declare\ -r*) ;;
*) eval "$1=\$2" ;;
esac
}
..and use it for your assignments;
$ assign foo bar
$ echo $foo
bar
$ assign foo "$foo and grill"
$ echo $foo
bar and grill
$ readonly foo
$ assign foo bar
$ echo $foo
bar and grill
$
--
Chris F.A. Johnson <http://cfaj.freeshell.org>
==================================================================
Shell Scripting Recipes: A Problem-Solution Approach, 2005, Apress
<http://www.torfree.net/~chris/books/cfaj/ssr.html>
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