1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "idmap2/CommandUtils.h"
18
19 #include <fstream>
20 #include <memory>
21 #include <string>
22 #include <vector>
23
24 #include "idmap2/Idmap.h"
25 #include "idmap2/Result.h"
26 #include "idmap2/SysTrace.h"
27
28 using android::idmap2::Error;
29 using android::idmap2::IdmapHeader;
30 using android::idmap2::OverlayResourceContainer;
31 using android::idmap2::Result;
32 using android::idmap2::TargetResourceContainer;
33 using android::idmap2::Unit;
34
Verify(const std::string & idmap_path,const std::string & target_path,const std::string & overlay_path,const std::string & overlay_name,PolicyBitmask fulfilled_policies,bool enforce_overlayable)35 Result<Unit> Verify(const std::string& idmap_path, const std::string& target_path,
36 const std::string& overlay_path, const std::string& overlay_name,
37 PolicyBitmask fulfilled_policies, bool enforce_overlayable) {
38 SYSTRACE << "Verify " << idmap_path;
39 std::ifstream fin(idmap_path);
40 const std::unique_ptr<const IdmapHeader> header = IdmapHeader::FromBinaryStream(fin);
41 fin.close();
42 if (!header) {
43 return Error("failed to parse idmap header");
44 }
45
46 auto target = TargetResourceContainer::FromPath(target_path);
47 if (!target) {
48 return Error("failed to load target '%s'", target_path.c_str());
49 }
50
51 auto overlay = OverlayResourceContainer::FromPath(overlay_path);
52 if (!overlay) {
53 return Error("failed to load overlay '%s'", overlay_path.c_str());
54 }
55
56 const auto header_ok = header->IsUpToDate(**target, **overlay, overlay_name, fulfilled_policies,
57 enforce_overlayable);
58 if (!header_ok) {
59 return Error(header_ok.GetError(), "idmap not up to date");
60 }
61 return Unit{};
62 }
63