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 1.4
       Copyright (C) 2010 Peter Miller

                                                                                         explain_ftell_or_die(3)