explain_dirfd_or_die - get directory stream file descriptor and report errors

       libexplain version 1.4
       Copyright (C) 2009 Peter Miller

                                                                                         explain_dirfd_or_die(3)

       The  explain_dirfd_or_die  function  is  used to call the dirfd(3) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_dirfd(3) function, and then the  process  terminates
       by calling exit(EXIT_FAILURE).

       The  explain_dirfd_on_error  function is used to call the dirfd(3) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_dirfd(3) function, but still returns to the caller.

       dir     The dir, exactly as to be passed to the dirfd(3) system call.

       The explain_dirfd_or_die function is intended to be used in a fashion similar to the following example:
              int result = explain_dirfd_or_die(dir);

       explain_dirfd_or_die - get directory stream file descriptor and report errors

       The explain_dirfd_or_die function only returns on success, see dirfd(3) for more information. On failure,
       prints an explanation and exits, it does not return.

       The explain_dirfd_on_error function always returns the value return by the wrapped dirfd(3) system call.

dirfd(3)
               get directory stream file descriptor

       explain_dirfd(3)
               explain dirfd(3) errors

       exit(2) terminate the calling process

       #include <libexplain/dirfd.h>
       int explain_dirfd_or_die(DIR *dir);
       int explain_dirfd_on_error(DIR *dir);