Bruno Haible via Gnulib discussion list <[email protected]> ha escrit:
> 2) Is it possible to integrate such a feature into a program that > uses getopt_long() without changing getopt_long() itself? > Is it possible to integrate such a feature into a program that > uses argp without changing the argp implementation itself? Both are possible, and boil down to suppressing error output and handling error returns explictly: For getopt_long, suppress error messages by setting opterr to 0, check for '?' return from getopt_long to see if it was a negative number. If not, report an error. Alternatively, start optstring with ':' to suppress error messages and check for ':' return from getopt_long, proceding as described above. For argp, set the ARGP_NO_ERRS flag and check for ARGP_KEY_ERROR in the option parser to discern between actual errors and negative numbers. Regards, Sergey
