The explain_readdir_or_die function
is used to call the readdir(2) system
call. On failure an explanation will be
printed to stderr,
obtained from explain_readdir(3),
and then the process terminates
by calling exit(EXIT_FAILURE).
This function is intended to be used in a fashion
similar to the following example:
explain_readdir_or_die(dir);
dir
The dir, exactly as to be passed to the readdir(2) system call.
Returns:
a pointer to a dirent structure, or NULL if end-of-file is reached.
On failure, prints an explanation and exits.