From 46dd4112732b90314d05bf9c946871408322868d Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Tue, 5 Aug 2025 03:06:40 +0300
Subject: [PATCH] LibC: fflush stdout when reading from stdin

This is the *intended behaviour* per ISO C specification
---
 userspace/libraries/LibC/stdio.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/userspace/libraries/LibC/stdio.cpp b/userspace/libraries/LibC/stdio.cpp
index 567f745e..a020a250 100644
--- a/userspace/libraries/LibC/stdio.cpp
+++ b/userspace/libraries/LibC/stdio.cpp
@@ -542,6 +542,9 @@ int getc_unlocked(FILE* file)
 	if (file->eof)
 		return EOF;
 
+	if (file == stdin && file->buffer_type == _IOLBF && stdout->buffer_type == _IOLBF && stdout->buffer_idx)
+		fflush(stdout);
+
 	// read characters from ungetc
 	if (file->unget_buf_idx)
 	{