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Kernel: Use KResultOr<size_t> throughout the TTY subsystem

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Previously the VirtualConsole::on_tty_write() method would return an
incorrect value when an error had occurred. This prompted me to
update the TTY subsystem to use KResultOr<size_t> everywhere.
This commit is contained in:
Gunnar Beutner 2021-06-16 15:20:35 +02:00 • committed by Andreas Kling
parent a49a15cabf
commit 1c3346e3ce
9 changed files with 29 additions and 29 deletions
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13
Kernel/UserOrKernelBuffer.h
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@ -133,12 +133,13 @@ public:
auto to_copy = min(sizeof(buffer), len - nread);
if (!read(buffer, nread, to_copy))
return EFAULT;
ssize_t copied = f(buffer, to_copy);
if (copied < 0)
return copied;
VERIFY((size_t)copied <= to_copy);
nread += (size_t)copied;
if ((size_t)copied < to_copy)
KResultOr<size_t> copied_or_error = f(buffer, to_copy);
if (copied_or_error.is_error())
return copied_or_error.error();
auto copied = copied_or_error.value();
VERIFY(copied <= to_copy);
nread += copied;
if (copied < to_copy)
break;
}
return nread;