fswap - File swap

fswap

#! /bin/sh

# fswap - File swap
# Copyright (C) 2015 Matous Jan Fialka, <http://mjf.cz/>
# Released under the terms of "The MIT License"

if [ $# -ne 2 ]
then
	echo "fswap FILE1 FILE2" >&2
	exit 1
fi

set -f

if TEMP_FILE="$(mktemp /tmp/fswap-XXXXXXXXXXXXXXXX)"
then
	if mv "$1" "$TEMP_FILE"
	then
		if mv "$2" "$1"
		then
			mv "$TEMP_FILE" "$2"
		fi
	fi

	rm "$TEMP_FILE"
fi

# vi:ft=sh