nc-chat.sh

#!/bin/bash

uso() {
    echo "Uso: $0 [c|s] nickname" >&2
    exit 1
}

if [ $# -ne 2 ]; then
    uso
fi
case "$1" in
    c)
        CMD="nc localhost 8008"
        ;;
    s)
        CMD="nc -l -p 8008"
        ;;
    *)
        uso
esac
NICK="$2"

while read line; do
    echo "$(date -R), "$NICK" says: $line"
done | $CMD