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