Implement WNOHANG in waitpid(2).

libmaxsi/include/sys/wait.h

@@ -24,10 +24,11 @@
 
 // TODO: Make this header comply with POSIX-1.2008
 
-#ifndef	_SYS_WAIT_H
-#define	_SYS_WAIT_H 1
+#ifndef _SYS_WAIT_H
+#define _SYS_WAIT_H 1
 
 #include <features.h>
+#include <sortix/wait.h>
 
 __BEGIN_DECLS
 

sortix/include/sortix/wait.h

@@ -0,0 +1,36 @@
+/*******************************************************************************
+
+	Copyright(C) Jonas 'Sortie' Termansen 2012.
+
+	This file is part of Sortix.
+
+	Sortix is free software: you can redistribute it and/or modify it under the
+	terms of the GNU General Public License as published by the Free Software
+	Foundation, either version 3 of the License, or (at your option) any later
+	version.
+
+	Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
+	WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+	FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+	details.
+
+	You should have received a copy of the GNU General Public License along with
+	Sortix. If not, see <http://www.gnu.org/licenses/>.
+
+	sortix/wait.h
+	Declarations for waiting for the events of children.
+
+*******************************************************************************/
+
+#ifndef INCLUDE_SORTIX_WAIT_H
+#define INCLUDE_SORTIX_WAIT_H
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+#define WNOHANG (1<<0)
+
+__END_DECLS
+
+#endif

sortix/process.cpp

@@ -30,6 +30,7 @@
 #include <sortix/unistd.h>
 #include <sortix/fork.h>
 #include <sortix/mman.h>
+#include <sortix/wait.h>
 #include <libmaxsi/error.h>
 #include <libmaxsi/memory.h>
 #include <libmaxsi/string.h>
@@ -353,6 +354,8 @@ namespace Sortix
 					break;
 			if ( zombie )
 				break;
+			if ( options & WNOHANG )
+				return 0;
 			zombiewaiting++;
 			kthread_cond_wait(&zombiecond, &childlock);
 			zombiewaiting--;