explain_fchmod_or_die - change permissions of an open file and report errors

       libexplain version 1.4
       Copyright (C) 2013 Peter Miller

                                                                                        explain_fchmod_or_die(3)

       The  explain_fchmod_or_die  function is used to call the fchmod(2) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_fchmod(3) function, and then the process  terminates
       by calling exit(EXIT_FAILURE).

       The explain_fchmod_on_error function is used to call the fchmod(2) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_fchmod(3) function, but still returns to the caller.

       fildes  The fildes, exactly as to be passed to the fchmod(2) system call.

       mode    The mode, exactly as to be passed to the fchmod(2) system call.

       The explain_fchmod_or_die function is intended to be used in a fashion similar to the following example:
              explain_fchmod_or_die(fildes, mode);

       explain_fchmod_or_die - change permissions of an open file and report errors

       The  explain_fchmod_or_die  function  only  returns  on  success,  see fchmod(2) for more information. On
       failure, prints an explanation and exits, it does not return.

       The explain_fchmod_on_error function always returns the value return  by  the  wrapped  fchmod(2)  system
       call.

fchmod(2)
               change permissions of an open file

       explain_fchmod(3)
               explain fchmod(2) errors

       exit(2) terminate the calling process

       #include <libexplain/fchmod.h>
       void explain_fchmod_or_die(int fildes, mode_t mode);
       int explain_fchmod_on_error(int fildes, mode_t mode);