explain_strtoull_or_die - convert string to integer and report errors

       libexplain version 1.4
       Copyright (C) 2009 Peter Miller

                                                                                      explain_strtoull_or_die(3)

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

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

       nptr    The nptr, exactly as to be passed to the strtoull(3) system call.

       endptr  The endptr, exactly as to be passed to the strtoull(3) system call.

       base    The base, exactly as to be passed to the strtoull(3) system call.

       The  explain_strtoull_or_die  function  is  intended  to  be  used  in a fashion similar to the following
       example:
              unsigned long long result = explain_strtoull_or_die(nptr, endptr, base);

       explain_strtoull_or_die - convert string to integer and report errors

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

       The explain_strtoull_on_error function always returns the value return by the wrapped strtoull(3)  system
       call.

strtoull(3)
               convert a string to an unsigned long integer

       explain_strtoull(3)
               explain strtoull(3) errors

       exit(2) terminate the calling process

       #include <libexplain/strtoull.h>
       unsigned long long explain_strtoull_or_die(const char *nptr, char **endptr, int base);
       unsigned long long explain_strtoull_on_error(const char *nptr, char **endptr, int base))