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1123af361d
This API now returns a KResultOr<NonnullOwnPtr<KString>> and allocation failures should be propagated everywhere nicely. :^)
37 lines
1.2 KiB
C++
37 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 <AK/StringView.h>
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#include <Kernel/FileSystem/Custody.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<int> Process::sys$chroot(Userspace<const char*> user_path, size_t path_length, int mount_flags)
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{
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if (!is_superuser())
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return EPERM;
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REQUIRE_PROMISE(chroot);
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auto path = get_syscall_path_argument(user_path, path_length);
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if (path.is_error())
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return path.error();
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auto directory_or_error = VFS::the().open_directory(path.value()->view(), current_directory());
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if (directory_or_error.is_error())
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return directory_or_error.error();
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auto directory = directory_or_error.value();
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m_root_directory_relative_to_global_root = directory;
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int chroot_mount_flags = mount_flags == -1 ? directory->mount_flags() : mount_flags;
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auto custody_or_error = Custody::try_create(nullptr, "", directory->inode(), chroot_mount_flags);
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if (custody_or_error.is_error())
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return custody_or_error.error();
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set_root_directory(custody_or_error.release_value());
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return 0;
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}
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}
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