_lessopen

#!/bin/bash

set -euo pipefail
IFS=

if [ $# -ne 1 ]; then
    echo "_lessopen called with other than 1 argument, fix zless!" >&2
    exit 1
fi

file="$1"

if echo "$file" | egrep -q '\.rz$'; then
    rzcat -- "$file"
else
    gzip -cdfq -- "$file"
fi