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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}"
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