1 files changed, 3 insertions, 3 deletions

diff --git a/miscutils/hdparm.c b/miscutils/hdparm.c
index 5703eceb5..512995a4b 100644
--- a/miscutils/hdparm.c
+++ b/miscutils/hdparm.c
@@ -2185,11 +2185,11 @@ int hdparm_main(int argc, char **argv)
         argc -= optind;
         argv += optind;
 
-#if ENABLE_FEATURE_HDPARM_GET_IDENTITY
         if (argc < 1) {
-                identify_from_stdin(); /* EXIT */
+                if (ENABLE_FEATURE_HDPARM_GET_IDENTITY && !isatty(STDIN_FILENO))
+                        identify_from_stdin(); /* EXIT */
+                else bb_show_usage();
         }
-#endif
 
         while (argc--) {
                 process_dev(*argv);