>>1042129 (OP)
txs anon
>h)
> echo "Usage: dnsbls [-h] [-d IMAGE_DISPLAY_COMMAND]"
> exit 255
#default to showing usage on wrong use of command:
[h,*])
echo "Usage: dnsbls [-h] [-d IMAGE_DISPLAY_COMMAND]"
exit 255
I can't recall if the syntax is correct since it's been a while, but you get the idea