NAME

       explain_ftell_or_die - get stream position and report errors

SYNOPSIS

       #include <libexplain/ftell.h>
       long explain_ftell_or_die(FILE *fp);
       long explain_ftell_on_error(FILE *fp);

DESCRIPTION

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

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

       fp      The fp, exactly as to be passed to the ftell(3) system call.

RETURN VALUE

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

       The explain_ftell_on_error function  always  returns  the  value  return  by  the  wrapped
       ftell(3) system call.

EXAMPLE

       The  explain_ftell_or_die  function  is  intended  to  be used in a fashion similar to the
       following example:
              long result = explain_ftell_or_die(fp);

SEE ALSO

       ftell(3)
               get stream position

       explain_ftell(3)
               explain ftell(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2010 Peter Miller

                                                                          explain_ftell_or_die(3)