Shell Programming and Scripting

#!/bin/sh
set -x

ok_versions="04-01-*|03-02-4"

my_version='04-01-2'
#   ${ok_versions} ) echo match

case ${my_version} in
   04-01-*|03-02-4 ) echo match
                   ;;
   *             ) echo no match
                   ;;
esac

Bash considers a variable in the pattern of a case statement to be a single argument; ksh interprets the expansion as it would a literal string.

This will work:

Code:

eval "
case ${my_version} in
   ${ok_versions} ) echo match
                   ;;
   *             ) echo no match
                   ;;
esac
"

In other posts, [[ ... ]] and extended globbing were used. These are both non-standard, so there is no guarantee that different shells (or even different versions of the same shell) will all work the same way.

Code:

ok_versions="03-02-4, 04-01-*"
my_version="04-01-2".

set -f
good=0
for ok in $ok_versions
do
  case $my_version in
    $ok) good=1 ;;
  esac
done
set +f
[ $good -eq 1 ] && echo match || echo no match

Ahhh, I see, I see. Is that a 'feechah' (if you know what I'm saying) or is it a well know limitation (and/or just the way the shells've been implemented?
Because I'd expect the variable to be evaluated by itself.......

Quote:

Originally Posted by cfajohnson

This will work:

Code:

eval "
case ${my_version} in
   ${ok_versions} ) echo match
                   ;;
   *             ) echo no match
                   ;;
esac
"

OK - I understand.

Quote:

Originally Posted by cfajohnson

In other posts, [[ ... ]] and extended globbing were used. These are both non-standard, so there is no guarantee that different shells (or even different versions of the same shell) will all work the same way.

Yeah, I know I know
trying figure out how to fix the OTHER way with globing:

Code:

#!/bin/ksh
set -x

ok_versions="04-01-*|03-02-4"
#ok_versions='04-01-*'

my_version='04-01-2'
#   04-01-*|03-02-4 ) echo match

eval "
case ${my_version} in
   ${ok_versions} ) echo match
                   ;;
   *             ) echo no match
                   ;;
esac
"

# ???? This does not work!!!!
eval "
if [ ${my_version} = +(${ok_versions}) ]; then
   echo match
else
   echo no match
fi

Code:

ok_versions="03-02-4 04-01-*"
my_version="04-01-2".

set -f
good=0
for ok in $ok_versions
do
  case $my_version in
    $ok) good=1 ;;
  esac
done
set +f
[ $good -eq 1 ] && echo match || echo no match