1 files changed, 45 insertions, 0 deletions
diff --git a/usr/klibc/tests/vfork.c b/usr/klibc/tests/vfork.c
new file mode 100644
index 0000000..7adc036
--- /dev/null
+++ b/usr/klibc/tests/vfork.c
@@ -0,0 +1,45 @@
+/*
+ * usr/klibc/tests/vfork.c
+ *
+ * vfork is messy on most architectures.  Do our best to test it out.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int main(int argc, char *argv[])
+{
+	pid_t f, rv;
+	int status;
+
+	f = vfork();
+
+	if (f == 0) {
+		printf("Child (%d)...\n", (int)getpid());
+		_exit(123);
+	} else if (f > 0) {
+		int err = 0;
+
+		printf("Parent (child = %d)\n", (int)f);
+
+		rv = waitpid(f, &status, 0);
+		if (rv != f) {
+			printf("waitpid returned %d, errno = %d\n",
+			       (int)rv, errno);
+			err++;
+		}
+		if (!WIFEXITED(status) || WEXITSTATUS(status) != 123) {
+			printf("Child process existed with wrong status %d\n",
+			       status);
+			err++;
+		}
+		return err;
+	} else {
+		printf("vfork returned %d, errno = %d\n",
+		       (int)f, errno);
+		return 127;
+	}
+}