+
−#!/bin/sh
+
−allquotes | if [ "$1" ]; then
+
−    if expr "$1" + 0 >/dev/null 2>&1; then
+
−        sed "$1q;d"
+
−    else
+
−        grep -P -i -- "$1"
+
−    fi
+
−else shuf --random-source=/dev/urandom -n 1; fi