getopts

Exit’s 1 when the next option it would give is “nothing” Option followed by a : is gonna have a

# m and N have additional arguments; p doesnt
for getopts m:N:p option ; do 
	echo $option # The actual letter
	echo $OPTIND # The index (starts at 2)
	echo $OPTARG # The argument from the option
done

• Also note that it honours — to mean “end of options”
• If an illegal option occurs, it’ll yell in console but NOT exit