explain_filename_from_fildes - obtain filename from file descriptor

       Written by Peter Miller <pmiller@opensource.org.au>

                                                                                 explain_filename_from_fildes(3)

       libexplain version 1.4
       Copyright (C) 2012 Peter Miller

       The  explain_filename_from_fildes function may be used to obtain the name of the file associated with the
       file descriptor.

       The explain_filename_from_stream function may be used to obtain the name of the file  associated  with  a
       file stream.

       The  filename  is  returned in the array pointed to by data.  The filename will always be NUL terminated.
       If the returned filename is longer than data_size, it will be silently truncated;  a  size  of  at  least
       (PATH_MAX + 1) is suggested.

       On success, returns zero.  If the file name cannot be determined, returns -1 (but does not set errno.)

       explain_filename_from_fildes - obtain filename from file descriptor

       #include <libexplain/filename.h>
       int explain_filename_from_fildes(int fildes, char *data, size_t data_size);
       int explain_filename_from_stream(FILE *stream, char *data, size_t data_size);