Kernel: Support O_APPEND

As per the manpage, this acts as a transparent lseek() before write.

2 files changed, 4 insertions, 0 deletions

diff --git a/Kernel/FileSystem/FileDescriptor.cpp b/Kernel/FileSystem/FileDescriptor.cpp
index b158fb6eb0..e199fdd298 100644
--- a/Kernel/FileSystem/FileDescriptor.cpp
+++ b/Kernel/FileSystem/FileDescriptor.cpp
@@ -75,6 +75,7 @@ Retained<FileDescriptor> FileDescriptor::clone()
     ASSERT(descriptor);
     descriptor->m_current_offset = m_current_offset;
     descriptor->m_is_blocking = m_is_blocking;
+    descriptor->m_should_append = m_should_append;
     descriptor->m_file_flags = m_file_flags;
     return *descriptor;
 }
diff --git a/Kernel/FileSystem/FileDescriptor.h b/Kernel/FileSystem/FileDescriptor.h
index 98631ce0ba..2f9b98c42b 100644
--- a/Kernel/FileSystem/FileDescriptor.h
+++ b/Kernel/FileSystem/FileDescriptor.h
@@ -70,6 +70,8 @@ public:
 
     bool is_blocking() const { return m_is_blocking; }
     void set_blocking(bool b) { m_is_blocking = b; }
+    bool should_append() const { return m_should_append; }
+    void set_should_append(bool s) { m_should_append = s; }
 
     dword file_flags() const { return m_file_flags; }
     void set_file_flags(dword flags) { m_file_flags = flags; }
@@ -113,6 +115,7 @@ private:
     dword m_file_flags { 0 };
 
     bool m_is_blocking { true };
+    bool m_should_append { false };
     SocketRole m_socket_role { SocketRole::None };
     FIFO::Direction m_fifo_direction { FIFO::Direction::Neither };
 };