--- libelwix/src/pio.c	2013/12/05 15:13:58	1.1.2.3
+++ libelwix/src/pio.c	2013/12/05 15:38:48	1.1.2.5
@@ -1,3 +1,48 @@
+/*************************************************************************
+* (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
+*  by Michael Pounov <misho@elwix.org>
+*
+* $Author: misho $
+* $Id: pio.c,v 1.1.2.5 2013/12/05 15:38:48 misho Exp $
+*
+**************************************************************************
+The ELWIX and AITNET software is distributed under the following
+terms:
+
+All of the documentation and software included in the ELWIX and AITNET
+Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
+
+Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
+	by Michael Pounov <misho@elwix.org>.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. All advertising materials mentioning features or use of this software
+   must display the following acknowledgement:
+This product includes software developed by Michael Pounov <misho@elwix.org>
+ELWIX - Embedded LightWeight unIX and its contributors.
+4. Neither the name of AITNET nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+*/
 #include "global.h"
 
 
@@ -197,4 +242,37 @@ pio_pgetpid(FILE * __restrict iop)
 	THREAD_UNLOCK();
 
 	return p;
+}
+
+/*
+ * pio_pchkpid() - Check exit status of child programs
+ *
+ * @pids = return tagPIOPID structures of exited programs, 
+ * 		if !=NULL must call array_Destroy()
+ * return: -1 error or >-1 exited programs
+ */
+int
+pio_pchkpid(array_t ** __restrict pids)
+{
+	register int ret = 0;
+	struct tagPIOPID *p;
+	array_t *pa;
+
+	if (pids) {
+		if (!(pa = array_Init(0)))
+			return -1;
+		else
+			*pids = pa;
+	}
+
+	THREAD_LOCK();
+	SLIST_FOREACH(p, &pio_pidlist, next)
+		if (p->fp && waitpid(p->pid, &p->stat, WNOHANG) > 0) {
+			if (pids)
+				array_Push(pa, p, 0);
+			ret++;
+		}
+	THREAD_UNLOCK();
+
+	return ret;
 }