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44 lines
1.2 KiB
C++
44 lines
1.2 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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KResultOr<FlatPtr> Process::sys$gethostname(Userspace<char*> buffer, size_t size)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this)
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REQUIRE_PROMISE(stdio);
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if (size > NumericLimits<ssize_t>::max())
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return EINVAL;
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return hostname().with_shared([&](const auto& name) -> KResultOr<FlatPtr> {
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if (size < (name.length() + 1))
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return ENAMETOOLONG;
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if (!copy_to_user(buffer, name.characters(), name.length() + 1))
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return EFAULT;
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return 0;
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});
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}
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KResultOr<FlatPtr> Process::sys$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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return hostname().with_exclusive([&](auto& name) -> KResultOr<FlatPtr> {
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auto copied_hostname = copy_string_from_user(buffer, length);
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if (copied_hostname.is_null())
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return EFAULT;
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name = move(copied_hostname);
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return 0;
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});
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}
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}
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