From 679ac386eb8e48628a08071e1a95cd2f1f1ca5af Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Sat, 27 Apr 2019 16:17:24 +0200
Subject: [PATCH] Kernel: "Succeed" quietly for zero-length read() and write().

---
 Kernel/Process.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index c379146160..e6771eb69c 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -822,6 +822,8 @@ ssize_t Process::sys$write(int fd, const byte* data, ssize_t size)
 {
     if (size < 0)
         return -EINVAL;
+    if (size == 0)
+        return 0;
     if (!validate_read(data, size))
         return -EFAULT;
 #ifdef DEBUG_IO
@@ -876,6 +878,8 @@ ssize_t Process::sys$read(int fd, byte* buffer, ssize_t size)
 {
     if (size < 0)
         return -EINVAL;
+    if (size == 0)
+        return 0;
     if (!validate_write(buffer, size))
         return -EFAULT;
 #ifdef DEBUG_IO