mirror of
https://github.com/RGBCube/serenity
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f86b671de2
Move away from using the group ID/user ID helpers in the process to allow for us to take advantage of the immutable credentials instead.
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$gethostname(Userspace<char*> buffer, size_t size)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::stdio));
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if (size > NumericLimits<ssize_t>::max())
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return EINVAL;
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return hostname().with_shared([&](auto const& name) -> ErrorOr<FlatPtr> {
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if (size < (name->length() + 1))
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return ENAMETOOLONG;
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TRY(copy_to_user(buffer, name->characters(), name->length() + 1));
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return 0;
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});
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}
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ErrorOr<FlatPtr> Process::sys$sethostname(Userspace<char const*> buffer, size_t length)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_no_promises());
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auto credentials = this->credentials();
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if (!credentials->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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hostname().with_exclusive([&](auto& name) {
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name = move(new_name);
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});
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return 0;
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}
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}
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