Add sys/wait.h

sys/include/wait.h

@@ -0,0 +1,20 @@
+
+#ifndef __SYS_WAIT_H__
+#define __SYS_WAIT_H__
+
+#include <sys/cdefs.h>
+
+/* Extract the status code from the process */
+#define WEXITSTATUS(_x)	(_x & 0x000000ff)
+#define WGETPID(_x)	((pid_t)(_x >> 16))
+
+/* Flags to waitpid  */
+#define WAIT_ANY	0
+
+#ifndef _KERNEL
+pid_t wait(int *status);
+pid_t waitpid(pid_t pid, int *status, int options);
+#endif
+
+#endif /* __SYS_WAIT_H__ */
+