1 files changed, 6 insertions, 1 deletions
diff --git a/posix/gawkmisc.c b/posix/gawkmisc.c
index 87a6747c..a5c3a619 100644
--- a/posix/gawkmisc.c
+++ b/posix/gawkmisc.c
@@ -207,10 +207,12 @@ os_isdir(int fd)
 /* os_isreadable --- fd can be read from */
 
 int
-os_isreadable(int fd)
+os_isreadable(int fd, bool *isdir)
 {
 	struct stat sbuf;
 
+	*isdir = false;
+
 	if (fstat(fd, &sbuf) != 0)
 		return false;
 
@@ -224,6 +226,9 @@ os_isreadable(int fd)
 	case S_IFIFO:
 #endif
 		return true;
+	case S_IFDIR:
+		*isdir = true;
+		/* fall through */
 	default:
 		return false;
 	}