expr "0" : '0$\|\(-[1-9]\|[1-9]\)[0-9]*$'
fails. I'm using GNU sh-utils 1.12. How about just
expr "$ans" : '0$\|-?[1-9][0-9]*$'
Larry
>Date: Tue, 03 Jun 1997 13:31:34 +0200
>From: Thomas Sailer <sailer@ife.ee.ethz.ch>
>Organization: IfE
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>> I would love it if only one more pre-patch is needed for a final
>> 2.0.31 so people please test this well.
>
>The configure script does not work for me.
>function int does not accept "0" as valid answer.
>I'm not sure if it is a shell utils bug however
>I'm using expr (GNU sh-utils) 1.16
>
>>From linux/scripts/Configure
>
>function int () {
> old=$(eval echo "\${$2}")
> def=${old:-$3}
> while :; do
> readln "$1 ($2) [$def] " "$def" "$old"
> if expr "$ans" : '0$\|\(-[1-9]\|[1-9]\)[0-9]*$' > /dev/null; then
>This expr ^ fails if given 0
>
> define_int "$2" "$ans"
> break
> else
> help "$2"
> fi
> done
>}
>
>
>Tom