Change Details

As per Utility Syntax Guidelines, accept both forms: -l -n and -ln. To do that, anticipate the source string for the next option that will be parsed by nextopt(). It's not always *argptr, sometimes it is nextopt_optptr. Rename not_fcnumber() to fcnumber() and adjust its logic in order to avoid introducing a double negative.

As per Utility Syntax Guidelines, accept both forms: -l -n and -ln. To do that, anticipate the source string for the next option that will be parsed by nextopt(). It's not always *argptr, sometimes it is nextopt_optptr. To simplify the check for not_fcnumber, slightly modify nextopt() to always nullify nextopt_optptr in cases where it would have been set to point to a NUL character.

As per Utility Syntax Guidelines, accept both forms: -l -n and -ln. To do that, anticipate the source string for the next option that will be parsed by nextopt(). It's not always *argptr, sometimes it is nextopt_optptr. Rename not_fcnumber() to To simplify the check for not_fcnumber() and adjust its logic in order to, slightly modify nextopt() to avoid introducing a double negativealways nullify nextopt_optptr in cases where it would have been set to point to a NUL character.