void explain_fseek_or_die(FILE *fp, long offset, int whence);
int explain_fseek_on_error(FILE *fp, long offset, int whence);
DESCRIPTION
The explain_fseek_or_die function is used to call the
fseek(3) system call. On failure an explanation will be printed to
stderr, obtained from the explain_fseek(3) function, and
then the process terminates by calling exit(EXIT_FAILURE).
The explain_fseek_on_error function is used to call the
fseek(3) system call. On failure an explanation will be printed to
stderr, obtained from the explain_fseek(3) function, but
still returns to the caller.
fp
The fp, exactly as to be passed to the fseek(3) system call.
offset
The offset, exactly as to be passed to the fseek(3) system call.
whence
The whence, exactly as to be passed to the fseek(3) system call.
RETURN VALUE
The explain_fseek_or_die function only returns on success, see
fseek(3) for more information. On failure, prints an explanation
and exits, it does not return.
The explain_fseek_on_error function always returns the value return
by the wrapped fseek(3) system call.
EXAMPLE
The explain_fseek_or_die function is intended to be used in a
fashion similar to the following example: