error: 
</P>
<DL>
	<DL>
		<DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>EINVAL</B> 
		</DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm">
		<I>signo</I> is not a valid signal number or is unsupported.</DD><DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm">
		<B>ESRCH</B> 
		</DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm">
		the thread <I>thread</I> does not exist (e.g. it has already
		terminated) 
		</DD></DL>
</DL>
<P>
The <B>sigwait</B> function never returns an error. 
</P>
<H2>