#!/bin/sh ! echo "$1" | grep "https*://\S\+\.[A-Za-z]\+\S*" >/dev/null && notify-send "That doesn't look like a full URL." && exit RSSFILE="${XDG_CONFIG_HOME:$HOME/.config}/newsboat/urls" if awk '{print $1}' "$RSSFILE" | grep "^$1$" >/dev/null; then notify-send "You already have this RSS feed." else echo "$1" >> "$RSSFILE" && notify-send "RSS feed added." fi