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