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79fa9765ca
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. :^)
42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Process.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$gethostname(Userspace<char*> buffer, size_t size)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this)
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REQUIRE_PROMISE(stdio);
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if (size > NumericLimits<ssize_t>::max())
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return EINVAL;
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return hostname().with_shared([&](const auto& name) -> ErrorOr<FlatPtr> {
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if (size < (name.length() + 1))
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return ENAMETOOLONG;
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TRY(copy_to_user(buffer, name.characters(), name.length() + 1));
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return 0;
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});
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}
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ErrorOr<FlatPtr> Process::sys$sethostname(Userspace<const char*> buffer, size_t length)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this)
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REQUIRE_NO_PROMISES;
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if (!is_superuser())
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return EPERM;
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if (length > 64)
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return ENAMETOOLONG;
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auto new_name = TRY(try_copy_kstring_from_user(buffer, length));
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return hostname().with_exclusive([&](auto& name) -> ErrorOr<FlatPtr> {
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// FIXME: Use KString instead of String here.
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name = new_name->view();
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return 0;
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});
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}
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}
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