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