Kernel: Replace KResult and KResultOr<T> with Error and ErrorOr<T>

We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace!
This was a slightly tedious refactoring that took a long time, so it's
not unlikely that some bugs crept in.

Nevertheless, it does pass basic functionality testing, and it's just
real nice to finally see the same pattern in all contexts. :^)

1 files changed, 6 insertions, 4 deletions

diff --git a/Kernel/Syscalls/ttyname.cpp b/Kernel/Syscalls/ttyname.cpp
index 2e73d06a9c..123a02498b 100644
--- a/Kernel/Syscalls/ttyname.cpp
+++ b/Kernel/Syscalls/ttyname.cpp
@@ -11,7 +11,7 @@
 
 namespace Kernel {
 
-KResultOr<FlatPtr> Process::sys$ttyname(int fd, Userspace<char*> buffer, size_t size)
+ErrorOr<FlatPtr> Process::sys$ttyname(int fd, Userspace<char*> buffer, size_t size)
 {
     VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
     REQUIRE_PROMISE(tty);
@@ -21,10 +21,11 @@ KResultOr<FlatPtr> Process::sys$ttyname(int fd, Userspace<char*> buffer, size_t
     auto& tty_name = description->tty()->tty_name();
     if (size < tty_name.length() + 1)
         return ERANGE;
-    return copy_to_user(buffer, tty_name.characters(), tty_name.length() + 1);
+    TRY(copy_to_user(buffer, tty_name.characters(), tty_name.length() + 1));
+    return 0;
 }
 
-KResultOr<FlatPtr> Process::sys$ptsname(int fd, Userspace<char*> buffer, size_t size)
+ErrorOr<FlatPtr> Process::sys$ptsname(int fd, Userspace<char*> buffer, size_t size)
 {
     VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
     REQUIRE_PROMISE(tty);
@@ -35,7 +36,8 @@ KResultOr<FlatPtr> Process::sys$ptsname(int fd, Userspace<char*> buffer, size_t
     auto& pts_name = master_pty->pts_name();
     if (size < pts_name.length() + 1)
         return ERANGE;
-    return copy_to_user(buffer, pts_name.characters(), pts_name.length() + 1);
+    TRY(copy_to_user(buffer, pts_name.characters(), pts_name.length() + 1));
+    return 0;
 }
 
 }