From 4dbffd990276fc6b9a3ffcca4a3c6686cc60ef4c Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Wed, 29 May 2024 16:58:53 -0400
Subject: only attempt to flush streams that can be flushed when parameter is
 NULL

---
 src/stdio/fflush.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/stdio/fflush.c b/src/stdio/fflush.c
index 2250aaaf..a1e984f9 100644
--- a/src/stdio/fflush.c
+++ b/src/stdio/fflush.c
@@ -13,7 +13,10 @@ int fflush(FILE *stream)
 	if (stream == NULL) {
 		size_t i;
 		for (i = 0; i < FOPEN_MAX; i++) {
-			fflush(&(__stdio.FILES[i]));
+			stream = __stdio.FILES + i;
+			if (stream->write && (stream->operation != OP_INPUT)) {
+				fflush(stream);
+			}
 		}
 		return 0;
 	}
-- 
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