sh question: commands as variables / stream operators in a variable

[Lennart Sorensen]

On Wed, Jul 11, 2007 at 02:30:04PM +0200, Christopher Friedt wrote:
> ah got it ;-)
> 
> #!/bin/sh
> 
> echo 'Hello World!' > test.txt
> CMD="cat test.txt"
> OUTFILE="test2.txt"
> 
> # COMP can be one of '', 'bzip2', 'gzip'
> COMP="bzip2"
> COMP_CMD=""
> case "$COMP" in
> ("bzip2")
>   COMP_CMD="| bzip2 -9"
>   OUTFILE="${OUTFILE}.bz2"
> ;;
> ("gzip")
>   COMP_CMD="| gzip -c -9"
>   OUTFILE="${OUTFILE}.gz"
> ;;
> ("")
>   COMP_CMD=""
> ;;
> (*)
> exit 1
> ;;
> esac
> 
> CMD="${CMD} ${COMP_CMD} > ${OUTFILE}"
> ${SHELL} -c "${CMD}"
> exit $?

Have about:
eval ${CMD}

--
Len Sorensen
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