217 bool ReadFdToString(borrowed_fd fd, std::string* content) {  in ReadFdToString()  argument
218   content->clear();  in ReadFdToString()
225     content->reserve(sb.st_size);  in ReadFdToString()
231     content->append(buf, n);  in ReadFdToString()
236 bool ReadFileToString(const std::string& path, std::string* content, bool follow_symlinks) {  in ReadFileToString()  argument
237   content->clear();  in ReadFileToString()
244   return ReadFdToString(fd, content);  in ReadFileToString()
247 bool WriteStringToFd(const std::string& content, borrowed_fd fd) {  in WriteStringToFd()  argument
248   const char* p = content.data();  in WriteStringToFd()
249   size_t left = content.size();  in WriteStringToFd()
270 bool WriteStringToFile(const std::string& content, const std::string& path,  in WriteStringToFile()  argument
291   if (!WriteStringToFd(content, fd)) {  in WriteStringToFile()
299 bool WriteStringToFile(const std::string& content, const std::string& path,  in WriteStringToFile()  argument
307   return WriteStringToFd(content, fd) || CleanUpAfterFailedWrite(path);  in WriteStringToFile()