* sysdeps/unix/fdopendir.c (fdopendir): If O_DIRECTORY is

	available, avoid stat call, use fcntl result to determine whether
	descriptor is for a directory or not.
	* dirent/Makefile (tests): Add tst-fdopendir2.
	* dirent/tst-fdopendir2.c: New file.

1 files changed, 41 insertions, 0 deletions

diff --git a/dirent/tst-fdopendir2.c b/dirent/tst-fdopendir2.c
new file mode 100644
index 0000000000..3720809dc2
--- /dev/null
+++ b/dirent/tst-fdopendir2.c
@@ -0,0 +1,41 @@
+#include <errno.h>
+#include <dirent.h>
+#include <stdio.h>
+#include <unistd.h>
+
+
+static int
+do_test (void)
+{
+  char tmpl[] = "/tmp/tst-fdopendir2-XXXXXX";
+  int fd = mkstemp (tmpl);
+  if (fd == -1)
+    {
+      puts ("cannot open temp file");
+      return 1;
+    }
+
+  errno = 0;
+  DIR *d = fdopendir (fd);
+
+  int e = errno;
+
+  close (fd);
+  unlink (tmpl);
+
+  if (d != NULL)
+    {
+      puts ("fdopendir with normal file descriptor did not fail");
+      return 1;
+    }
+  if (e != ENOTDIR)
+    {
+      printf ("fdopendir set errno to %d, not %d as expected\n", e, ENOTDIR);
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"