From 2cdc815322af6c7c22b9ceb371d9c7b2a4853c0e Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Fri, 29 Jul 2022 19:06:23 +0200
Subject: syscall/write: WRITE_TRUNCATE

---
 src/kernel/arch/amd64/driver/fsroot.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/kernel/arch/amd64/driver/fsroot.c')

diff --git a/src/kernel/arch/amd64/driver/fsroot.c b/src/kernel/arch/amd64/driver/fsroot.c
index c4c3de4..2feaf67 100644
--- a/src/kernel/arch/amd64/driver/fsroot.c
+++ b/src/kernel/arch/amd64/driver/fsroot.c
@@ -94,6 +94,8 @@ static int handle(struct vfs_request *req) {
 			switch (id) {
 				case HANDLE_VGA: {
 					void *vga = (void*)0xB8000;
+					if (req->flags)
+						return -1;
 					fs_normslice(&req->offset, &req->input.len, 80*25*2, false);
 					if (!virt_cpy_from(req->caller->pages, vga + req->offset,
 							req->input.buf, req->input.len))
-- 
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