7.4.22 VALUE_OPT_name - Option Flag Value

This is a #define for the flag character used to specify an option on the command line. If value was not specified for the option, then it is a unique number associated with the option. option value refers to this value, option argument refers to the (optional) argument to the option.

switch (WHICH_OPT_OTHER_OPT) {
case VALUE_OPT_NAME:
    this-option-was-really-opt-name;
case VALUE_OPT_OTHER_OPT:
    this-option-was-really-other-opt;
}