| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef INCLUDE_PERFETTO_EXT_BASE_FILE_UTILS_H_ |
| #define INCLUDE_PERFETTO_EXT_BASE_FILE_UTILS_H_ |
| |
| #include <fcntl.h> // For mode_t & O_RDONLY/RDWR. Exists also on Windows. |
| #include <stddef.h> |
| |
| #include <string> |
| #include <vector> |
| |
| #include "perfetto/base/build_config.h" |
| #include "perfetto/base/export.h" |
| #include "perfetto/base/status.h" |
| #include "perfetto/ext/base/scoped_file.h" |
| #include "perfetto/ext/base/utils.h" |
| |
| namespace perfetto { |
| namespace base { |
| |
| #if PERFETTO_BUILDFLAG(PERFETTO_OS_WIN) |
| using FileOpenMode = int; |
| #else |
| using FileOpenMode = mode_t; |
| #endif |
| |
| constexpr FileOpenMode kFileModeInvalid = static_cast<FileOpenMode>(-1); |
| |
| bool ReadPlatformHandle(PlatformHandle, std::string* out); |
| bool ReadFileDescriptor(int fd, std::string* out); |
| bool ReadFileStream(FILE* f, std::string* out); |
| bool ReadFile(const std::string& path, std::string* out); |
| |
| // A wrapper around read(2). It deals with Linux vs Windows includes. It also |
| // deals with handling EINTR. Has the same semantics of UNIX's read(2). |
| ssize_t Read(int fd, void* dst, size_t dst_size); |
| |
| // Call write until all data is written or an error is detected. |
| // |
| // man 2 write: |
| // If a write() is interrupted by a signal handler before any bytes are |
| // written, then the call fails with the error EINTR; if it is |
| // interrupted after at least one byte has been written, the call |
| // succeeds, and returns the number of bytes written. |
| ssize_t WriteAll(int fd, const void* buf, size_t count); |
| |
| ssize_t WriteAllHandle(PlatformHandle, const void* buf, size_t count); |
| |
| ScopedFile OpenFile(const std::string& path, |
| int flags, |
| FileOpenMode = kFileModeInvalid); |
| ScopedFstream OpenFstream(const char* path, const char* mode); |
| |
| // This is an alias for close(). It's to avoid leaking Windows.h in headers. |
| // Exported because ScopedFile is used in the /include/ext API by Chromium |
| // component builds. |
| int PERFETTO_EXPORT_COMPONENT CloseFile(int fd); |
| |
| bool FlushFile(int fd); |
| |
| // Returns true if mkdir succeeds, false if it fails (see errno in that case). |
| bool Mkdir(const std::string& path); |
| |
| // Calls rmdir() on UNIX, _rmdir() on Windows. |
| bool Rmdir(const std::string& path); |
| |
| // Wrapper around access(path, F_OK). |
| bool FileExists(const std::string& path); |
| |
| // Gets the extension for a filename. If the file has two extensions, returns |
| // only the last one (foo.pb.gz => .gz). Returns empty string if there is no |
| // extension. |
| std::string GetFileExtension(const std::string& filename); |
| |
| // Puts the path to all files under |dir_path| in |output|, recursively walking |
| // subdirectories. File paths are relative to |dir_path|. Only files are |
| // included, not directories. Path separator is always '/', even on windows (not |
| // '\'). |
| base::Status ListFilesRecursive(const std::string& dir_path, |
| std::vector<std::string>& output); |
| |
| } // namespace base |
| } // namespace perfetto |
| |
| #endif // INCLUDE_PERFETTO_EXT_BASE_FILE_UTILS_H_ |