Importing Egor's testsuite.

winsup/testsuite/winsup.api/waitpid.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <sys/wait.h>
+#include <errno.h>
+
+int
+main (int argc, char **argv)
+{
+  int pid, n;
+  if ((pid = fork ()) == 0)
+    exit (0);
+  sleep (2);
+  if ((n = waitpid (pid, NULL, 0)) != pid)
+    {
+      printf ("wait pid failed, pid %d, n %d, errno %d\n", pid, n, errno);
+      exit(1);
+    }
+  else
+    {
+      printf ("wait pid succeeded, pid %d, n %d, errno %d\n", pid, n, errno);
+      exit (0);
+    }
+}