значение optind не будет сбрасываться при каждом вызове getopt [закрыто]

От мужчинаgetopt:

Notes

A program that scans multiple argument vectors, or rescans the same vector more than once, and wants to make use of GNU extensions such as '+' and '-' at the start of optstring, or changes the value of POSIXLY_CORRECT between scans, must reinitialize getopt() by resetting optind to 0, rather than the traditional value of 1. (Resetting to 0 forces the invocation of an internal initialization routine that rechecks POSIXLY_CORRECT and checks for GNU extensions in optstring.)

Таким образом, простого optind = 0;между вызовами getopt()должно быть достаточно.