1 : // Copyright (c) 2006, Google Inc.
2 : // All rights reserved.
3 : //
4 : // Redistribution and use in source and binary forms, with or without
5 : // modification, are permitted provided that the following conditions are
6 : // met:
7 : //
8 : // * Redistributions of source code must retain the above copyright
9 : // notice, this list of conditions and the following disclaimer.
10 : // * Redistributions in binary form must reproduce the above
11 : // copyright notice, this list of conditions and the following disclaimer
12 : // in the documentation and/or other materials provided with the
13 : // distribution.
14 : // * Neither the name of Google Inc. nor the names of its
15 : // contributors may be used to endorse or promote products derived from
16 : // this software without specific prior written permission.
17 : //
18 : // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 : // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 : // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 : // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 : // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 : // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 : // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 : // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 : // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 : // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 : // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 : //
30 : // file_id.h: Return a unique identifier for a file
31 : //
32 :
33 : #ifndef COMMON_LINUX_FILE_ID_H__
34 : #define COMMON_LINUX_FILE_ID_H__
35 :
36 : #include <limits.h>
37 :
38 : #include "common/linux/guid_creator.h"
39 :
40 : namespace google_breakpad {
41 :
42 : static const size_t kMDGUIDSize = sizeof(MDGUID);
43 :
44 : class FileID {
45 : public:
46 : explicit FileID(const char* path);
47 124 : ~FileID() {}
48 :
49 : // Load the identifier for the elf file path specified in the constructor into
50 : // |identifier|. Return false if the identifier could not be created for the
51 : // file.
52 : // The current implementation will XOR the first 4096 bytes of the
53 : // .text section to generate an identifier.
54 : bool ElfFileIdentifier(uint8_t identifier[kMDGUIDSize]);
55 :
56 : // Load the identifier for the elf file mapped into memory at |base| into
57 : // |identifier|. Return false if the identifier could not be created for the
58 : // file.
59 : static bool ElfFileIdentifierFromMappedFile(void* base,
60 : uint8_t identifier[kMDGUIDSize]);
61 :
62 : // Convert the |identifier| data to a NULL terminated string. The string will
63 : // be formatted as a UUID (e.g., 22F065BB-FC9C-49F7-80FE-26A7CEBD7BCE).
64 : // The |buffer| should be at least 37 bytes long to receive all of the data
65 : // and termination. Shorter buffers will contain truncated data.
66 : static void ConvertIdentifierToString(const uint8_t identifier[kMDGUIDSize],
67 : char* buffer, int buffer_length);
68 :
69 : private:
70 : // Storage for the path specified
71 : char path_[PATH_MAX];
72 : };
73 :
74 : } // namespace google_breakpad
75 :
76 : #endif // COMMON_LINUX_FILE_ID_H__
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