From 68a0ad7f21ba07b93cd63613996e27afd8780f9c Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 21 Mar 2021 00:13:13 +0100
Subject: Added basic shared memory support

This will be improved soon. It's very insecure right now.
---
 libgui/msg.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'libgui/msg.c')

diff --git a/libgui/msg.c b/libgui/msg.c
index 3f58267..677ad52 100644
--- a/libgui/msg.c
+++ b/libgui/msg.c
@@ -1,12 +1,15 @@
 // MIT License, Copyright (c) 2021 Marvin Borner
 
 #include <assert.h>
+#include <errno.h>
 #include <msg.h>
 #include <print.h>
 #include <sys.h>
 
 int msg_send(u32 pid, enum message_type type, void *data, u32 size)
 {
+	if (!data)
+		return -EFAULT;
 	assert((signed)pid != -1 && size >= sizeof(struct message_header));
 	char path[32] = { 0 };
 	sprintf(path, "/proc/%d/msg", pid);
-- 
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