1 files changed, 47 insertions, 0 deletions
diff --git a/regress/lib/libpthread/closefrom/closefrom.c b/regress/lib/libpthread/closefrom/closefrom.c
new file mode 100644
index 00000000000..3568e41a8a7
--- /dev/null
+++ b/regress/lib/libpthread/closefrom/closefrom.c
@@ -0,0 +1,47 @@
+/* $OpenBSD: closefrom.c,v 1.1 2004/01/15 22:22:52 marc Exp $ */
+
+/* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */
+
+#include <errno.h>
+#include <pthread.h>
+#include <unistd.h>
+
+#include "test.h"
+
+static void *
+dummy_thread(void* arg)
+{
+	/* just exit */
+	return NULL;
+}
+
+/*
+ * Test that closefrom does the right thing in a threaded programs,
+ * specifically that it doesn't kill the thread kernel signal pipe.
+ */
+int
+main(int argc, char *argv[])
+{
+	pthread_t thread;
+	void *status;
+	int fd;
+	int result;
+
+	/* close files above stderr.   The kernel pipes shouldn't be touched */
+	fd = STDERR_FILENO + 1;
+	result = closefrom(fd);
+	printf("closefrom(%d) == %d/%d\n", fd, result, errno);
+
+	/* do it again: make sure that the result is -1/EBADF */
+	result = closefrom(fd);
+	printf("closefrom(%d) == %d/%d\n", fd, result, errno);
+	ASSERT(result == -1 && errno == EBADF);
+
+	/* start a thread to verify the thread kernel is working */
+	CHECKr(pthread_create(&thread, NULL, dummy_thread, NULL));
+	CHECKr(pthread_join(thread, &status));
+	printf("dummy thread exited with status %p\n", status);
+
+	SUCCEED;
+	return 0;
+}