#include <linux/wait.h>
+#define WEXITSTATUS(s) (((s) & 0xff00) >> 8)
+#define WTERMSIG(s) ((s) & 0x7f)
+#define WIFEXITED(s) (WTERMSIG(s) == 0)
+#define WIFSTOPPED(s) (WTERMSIG(s) == 0x7f)
+/* Ugly hack to avoid multiple evaluation of "s" */
+#define WIFSIGNALED(s) (WTERMSIG((s)+1) >= 2)
+#define WCOREDUMP(s) ((s) & 0x80)
+#define WSTOPSIG(s) WEXITSTATUS(s)
+
__extern pid_t wait(int *);
__extern pid_t waitpid(pid_t, int *, int);
__extern pid_t wait3(int *, int, struct rusage *);