explain_fcntl_or_die - manipulate a file descriptor and report errors

       libexplain version 1.4
       Copyright (C) 2008 Peter Miller

                                                                                         explain_fcntl_or_die(3)

       The  explain_fcntl_or_die  function  is used to call the fcntl(2) system call.  On failure an explanation
       will be printed to stderr, obtained from explain_fcntl(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:
              int result = explain_fcntl_or_die(fildes, command, arg);

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

       command The command, exactly as to be passed to the fcntl(2) system call.

       arg     The arg, exactly as to be passed to the fcntl(2) system call.

       Returns:
               This function only returns on success, and it returns whatever was returned by the fcntl(2) call;
               depending  on the command, this may have no use.  On failure, prints an explanation and exits, it
               does not return.

       explain_fcntl_or_die - manipulate a file descriptor and report errors

fcntl(2)
               manipulate a file descriptor

       explain_fcntl(3)
               explain fcntl(2) errors

       exit(2) terminate the calling process

       #include <libexplain/fcntl.h>
       int explain_fcntl_or_die(int fildes, int command, long arg);