Kernel/LibC/Userspace: Implement chown and set tty owner on login

kernel/include/kernel/FS/Inode.h

@@ -101,6 +101,7 @@ namespace Kernel
 		BAN::ErrorOr<size_t> write(off_t, BAN::ConstByteSpan buffer);
 		BAN::ErrorOr<void> truncate(size_t);
 		BAN::ErrorOr<void> chmod(mode_t);
+		BAN::ErrorOr<void> chown(uid_t, gid_t);
 		bool has_data() const;
 
 	protected:
@@ -119,6 +120,7 @@ namespace Kernel
 		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan)	{ return BAN::Error::from_errno(ENOTSUP); }
 		virtual BAN::ErrorOr<void> truncate_impl(size_t)					{ return BAN::Error::from_errno(ENOTSUP); }
 		virtual BAN::ErrorOr<void> chmod_impl(mode_t)						{ return BAN::Error::from_errno(ENOTSUP); }
+		virtual BAN::ErrorOr<void> chown_impl(uid_t, gid_t)					{ return BAN::Error::from_errno(ENOTSUP); }
 		virtual bool has_data_impl() const { dwarnln("nonblock not supported"); return true; }
 
 	protected:

kernel/include/kernel/Process.h

@@ -108,6 +108,7 @@ namespace Kernel
 		BAN::ErrorOr<long> sys_pread(int fd, void* buffer, size_t count, off_t offset);
 
 		BAN::ErrorOr<long> sys_chmod(const char*, mode_t);
+		BAN::ErrorOr<long> sys_chown(const char*, uid_t, gid_t);
 
 		BAN::ErrorOr<long> sys_pipe(int fildes[2]);
 		BAN::ErrorOr<long> sys_dup(int fildes);

kernel/include/kernel/Terminal/TTY.h

@@ -41,6 +41,9 @@ namespace Kernel
 
 		virtual void clear() = 0;
 
+		virtual BAN::ErrorOr<void> chmod_impl(mode_t) override;
+		virtual BAN::ErrorOr<void> chown_impl(uid_t, gid_t) override;
+
 		virtual bool has_data_impl() const override;
 
 	protected: