1 // Copyright (C) 2020 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef IORAP_SRC_INODE2FILENAME_OUT_OF_PROCESS_INDOE_RESOLVER_H_ 16 #define IORAP_SRC_INODE2FILENAME_OUT_OF_PROCESS_INDOE_RESOLVER_H_ 17 18 #include "common/expected.h" 19 #include "inode2filename/inode_resolver.h" 20 21 namespace iorap::inode2filename { 22 23 // Create an InodeResolver that fork+exec+pipes into the binary 'iorap.inode2filename' 24 // and transmits the results back via an IPC mechanism. 25 // 26 // This is instantiated by InodeResolver::Create + ProcessMode::kOutOfProcessIpc 27 class OutOfProcessInodeResolver : public InodeResolver { 28 public: 29 virtual rxcpp::observable<InodeResult> 30 FindFilenamesFromInodes(std::vector<Inode> inodes) const override; 31 32 virtual rxcpp::observable<InodeResult> 33 EmitAll() const override; 34 35 OutOfProcessInodeResolver(InodeResolverDependencies dependencies); 36 ~OutOfProcessInodeResolver(); 37 private: 38 struct Impl; 39 Impl* impl_; 40 }; 41 42 // Reads one line data from the stream. 43 // Each line is in the format of "<4 bytes line length><state> <inode info> <file path>" 44 // The <4 bytes line length> is the length rest data of "<state> <inode info> <file path>". 45 // The return string is "<state> <inode info> <file path>". 46 // For example: for "<size>K 253:9:6 ./test", the return value is 47 // "K 253:9:6 ./test". The <size> is encoded in the first 4 bytes. 48 // Note: there is no newline in the end of each line and the line shouldn't be 49 // empty unless there is some error. 50 std::string ReadOneLine(FILE* stream, bool* eof); 51 } 52 53 #endif // IORAP_SRC_INODE2FILENAME_OUT_OF_PROCESS_INDOE_RESOLVER_H_ 54