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 #ifndef INCLUDE_PERFETTO_BASE_FILE_UTILS_H_ 18 #define INCLUDE_PERFETTO_BASE_FILE_UTILS_H_ 19 20 #include <stddef.h> 21 22 #include <string> 23 24 #include "perfetto/base/utils.h" // For ssize_t on Windows. 25 26 namespace perfetto { 27 namespace base { 28 29 bool ReadFileDescriptor(int fd, std::string* out); 30 bool ReadFileStream(FILE* f, std::string* out); 31 bool ReadFile(const std::string& path, std::string* out); 32 33 // Call write until all data is written or an error is detected. 34 // 35 // man 2 write: 36 // If a write() is interrupted by a signal handler before any bytes are 37 // written, then the call fails with the error EINTR; if it is 38 // interrupted after at least one byte has been written, the call 39 // succeeds, and returns the number of bytes written. 40 ssize_t WriteAll(int fd, const void* buf, size_t count); 41 42 bool FlushFile(int fd); 43 44 } // namespace base 45 } // namespace perfetto 46 47 #endif // INCLUDE_PERFETTO_BASE_FILE_UTILS_H_ 48