Options not parse as Argument in Unix

Question

I has an existing script which works on $1 $2 $3, etc. I want to add an optional argument without disturbing the order.

Do we have some ready made solution for: If a valid option (using getopts) is found, this index of argument should not be considered as argument.

Answer 1

The usual solution is to use getopts to scan and process the optional flag options, and then execute the command:

shift $((OPTIND-1))

When getopts finishes, $OPTIND will be the number of the first as-yet-unprocessed argument. The shift command then deletes the first OPTIND-1 arguments, which effectively renumbers the unhandled parameters to $1, $2,....