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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_INSTALL_ACTION_H__ | |
6 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_INSTALL_ACTION_H__ | |
7 | |
8 #include "base/scoped_ptr.h" | |
9 #include "update_engine/action.h" | |
10 #include "update_engine/delta_diff_parser.h" | |
11 #include "update_engine/install_plan.h" | |
12 #include "update_engine/update_metadata.pb.h" | |
13 | |
14 // The Install Action is responsible for ensuring the update that's been | |
15 // downloaded has been installed. This may be a no-op in the case of a full | |
16 // update, since those will be downloaded directly into the destination | |
17 // partition. However, for a delta update some work is required. | |
18 | |
19 // An InstallPlan struct must be passed to this action before PerformAction() | |
20 // is called so that this action knows if it's a delta update, and if so, | |
21 // what the paths are. | |
22 | |
23 // TODO(adlr): At the moment, InstallAction is synchronous. It should be | |
24 // updated to be asynchronous at some point. | |
25 | |
26 namespace chromeos_update_engine { | |
27 | |
28 class InstallAction; | |
29 class NoneType; | |
30 | |
31 template<> | |
32 class ActionTraits<InstallAction> { | |
33 public: | |
34 // Takes the InstallPlan for input | |
35 typedef InstallPlan InputObjectType; | |
36 // On success, puts the output device path on output | |
37 typedef std::string OutputObjectType; | |
38 }; | |
39 | |
40 class InstallAction : public Action<InstallAction> { | |
41 public: | |
42 InstallAction() {} | |
43 typedef ActionTraits<InstallAction>::InputObjectType InputObjectType; | |
44 typedef ActionTraits<InstallAction>::OutputObjectType OutputObjectType; | |
45 void PerformAction(); | |
46 | |
47 // This action is synchronous for now. | |
48 void TerminateProcessing() { CHECK(false); } | |
49 | |
50 // Debugging/logging | |
51 static std::string StaticType() { return "InstallAction"; } | |
52 std::string Type() const { return StaticType(); } | |
53 | |
54 private: | |
55 // Installs 'file' into mountpoint. 'path' is the path that 'file' | |
56 // should have when we reboot and mountpoint is root. | |
57 bool InstallFile(const std::string& mountpoint, | |
58 const DeltaArchiveManifest_File& file, | |
59 const std::string& path, | |
60 const DeltaDiffParser& parser) const; | |
61 // These are helpers for InstallFile. They focus on specific file types: | |
62 // Regular data files: | |
63 bool InstallFileRegularFile(const std::string& mountpoint, | |
64 const DeltaArchiveManifest_File& file, | |
65 const std::string& path, | |
66 const DeltaDiffParser& parser, | |
67 const bool exists) const; | |
68 // char/block devices, fifos, and sockets: | |
69 bool InstallFileSpecialFile(const std::string& mountpoint, | |
70 const DeltaArchiveManifest_File& file, | |
71 const std::string& path, | |
72 const DeltaDiffParser& parser, | |
73 const bool exists) const; | |
74 // symlinks: | |
75 bool InstallFileSymlink(const std::string& mountpoint, | |
76 const DeltaArchiveManifest_File& file, | |
77 const std::string& path, | |
78 const DeltaDiffParser& parser, | |
79 const bool exists) const; | |
80 | |
81 DISALLOW_COPY_AND_ASSIGN(InstallAction); | |
82 }; | |
83 | |
84 } // namespace chromeos_update_engine | |
85 | |
86 #endif // CHROMEOS_PLATFORM_UPDATE_ENGINE_INSTALL_ACTION_H__ | |
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