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| #!/bin/sh
|
| candidate="$1" # ignored
|
| gzip="$(which gzip)"
| if [ ! -x "${gzip}" ]; then
| # echo nothing: no suitable gzip found
| exit 1
| fi
|
| # gzip displays its version string on stdout
| # pigz displays its version string on stderr
| version="$("${gzip}" --version 2>&1)"
| case "${version}" in
| (*pigz*)
| # echo nothing: no suitable gzip found
| exit 1
| ;;
| esac
|
| printf "%s" "${gzip}"
|
|
