gunzip-dpv -- gunzip with a TUI/GUI

#!/bin/sh
[ "${LC_ALL:+set}" ] || export LC_ALL=en_US.ISO8859-1
while [ $# -gt 0 ]; do
	FILE="$1" shift
	[ -f "$FILE" ] || continue
	[ "$FILE" != "${FILE%.gz}" ] || {
		echo "ERROR: $FILE does not end in \`.gz'" >&2
		exit 1
	}
	SIZE=$( stat -f%z "$FILE" )
	export FILE
	dpv -wmx 'zcat > "${FILE%.gz}"' "$SIZE${SIZE:+:}$FILE" "$FILE" || exit
done