#!/bin/sh

die() {
    printf '%s: %s\n' "${0##*/}" "$1" >&2

    exit 1
}

if [ "$1" = "-" ]; then
    while IFS= read -r line; do
        input="$line"
    done
else
    input="$1"
fi

[ -f "$input" ] || die "$input: no such file"
case "$input" in
/*) ;;
*) die "$input: not an absolute path" ;;
esac

ln -sf "$input" "$XDG_DATA_HOME/screenlayout"
. "$XDG_DATA_HOME/screenlayout"