1 files changed, 14 insertions, 1 deletions
diff --git a/tests/test-fstat.c b/tests/test-fstat.c
index 3af63136..2fda6963 100644
--- a/tests/test-fstat.c
+++ b/tests/test-fstat.c
@@ -1,5 +1,5 @@
 /* Tests of fstat() function.
-   Copyright (C) 2011-2024 Free Software Foundation, Inc.
+   Copyright (C) 2011-2025 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -22,6 +22,7 @@
 SIGNATURE_CHECK (fstat, int, (int, struct stat *));
 
 #include <errno.h>
+#include <fcntl.h>
 #include <unistd.h>
 
 #include "macros.h"
@@ -46,5 +47,17 @@ main ()
     ASSERT (errno == EBADF);
   }
 
+  /* /dev/null is a character device.  */
+  {
+    int fd;
+    struct stat statbuf;
+
+    fd = open ("/dev/null", O_RDWR);
+    ASSERT (fstat (fd, &statbuf) == 0);
+    close (fd);
+    ASSERT (!S_ISREG (statbuf.st_mode));
+    ASSERT (S_ISCHR (statbuf.st_mode));
+  }
+
   return test_exit_status;
 }