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34 lines
1,014 B
C++
34 lines
1,014 B
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 <AK/StringView.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Tasks/Process.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$faccessat(Userspace<Syscall::SC_faccessat_params const*> user_params)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::rpath));
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auto params = TRY(copy_typed_from_user(user_params));
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auto pathname = TRY(get_syscall_path_argument(params.pathname));
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if ((params.flags & ~(AT_SYMLINK_NOFOLLOW | AT_EACCESS)) != 0)
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return EINVAL;
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auto flags = AccessFlags::None;
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if (params.flags & AT_SYMLINK_NOFOLLOW)
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flags |= AccessFlags::DoNotFollowSymlinks;
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if (params.flags & AT_EACCESS)
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flags |= AccessFlags::EffectiveAccess;
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TRY(VirtualFileSystem::the().access(credentials(), pathname->view(), params.mode, TRY(custody_for_dirfd(params.dirfd)), flags));
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return 0;
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}
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}
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