#!/bin/sh
: Simple chat system.  cf. rgyap.  ${nick=${1-$USER}} ${chan=${2-/var/tmp/chat}}
echo "Chatting on $chan as <$nick> (override with $0 \$nick [\$chan])"
touch "$chan" && chmod 666 "$chan" 2>/dev/null
sign() {
    echo "$(date +%T) * $nick signed $1 ($(date +%05Y-%m-%d))" >> "$chan"
}
echo "Press ^R if a chat line appears as you are typing.  Recently:"
tail -Fn 16 "$chan" & pid=$?; trap "sign off; sleep .1; kill $pid" 0
sign on; while IFS= read -r t; do echo "$(date +%T) <$nick> $t"; done >> "$chan"