#!/bin/sh
set -eu

if tty -s; then
	err=0
	[[ $# -eq 0 ]] && err=1
	for i in $@; do
		[[ -f $i ]] || err=1
	done

	[[ $err -eq 0 ]] || (echo "usage: ${0##*/} [file]" 1>&2 && exit 1)
fi

curl -F "sprunge=<${@:--}" http://sprunge.us