ardupilot/libraries/AP_Filesystem/AP_Filesystem.h

91 lines
2.5 KiB
C++

/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
ArduPilot filesystem interface. This offsets a minimal subset of
full functionality offered by posix type interfaces, meeting the
needs of ArduPilot
*/
#pragma once
#include <stdint.h>
#include <AP_HAL/AP_HAL_Boards.h>
#include "AP_Filesystem_Available.h"
#if HAVE_FILESYSTEM_SUPPORT
#if CONFIG_HAL_BOARD == HAL_BOARD_CHIBIOS
#include "AP_Filesystem_FATFS.h"
#endif
#if CONFIG_HAL_BOARD == HAL_BOARD_LINUX || CONFIG_HAL_BOARD == HAL_BOARD_SITL
#include "AP_Filesystem_posix.h"
#endif
class AP_Filesystem {
private:
struct DirHandle {
uint8_t fs_index;
void *dir;
};
public:
AP_Filesystem() {}
// functions that closely match the equivalent posix calls
int open(const char *fname, int flags);
int close(int fd);
ssize_t read(int fd, void *buf, size_t count);
ssize_t write(int fd, const void *buf, size_t count);
int fsync(int fd);
off_t lseek(int fd, off_t offset, int whence);
int stat(const char *pathname, struct stat *stbuf);
int unlink(const char *pathname);
int mkdir(const char *pathname);
DirHandle *opendir(const char *pathname);
struct dirent *readdir(DirHandle *dirp);
int closedir(DirHandle *dirp);
// return free disk space in bytes, -1 on error
int64_t disk_free(const char *path);
// return total disk space in bytes, -1 on error
int64_t disk_space(const char *path);
// set modification time on a file
bool set_mtime(const char *filename, const time_t mtime_sec);
private:
struct Backend {
const char *prefix;
AP_Filesystem_Backend &fs;
};
static const struct Backend backends[];
/*
find backend by path
*/
const Backend &backend_by_path(const char *&path) const;
/*
find backend by open fd
*/
const Backend &backend_by_fd(int &fd) const;
};
namespace AP {
AP_Filesystem &FS();
};
#endif // HAVE_FILESYSTEM_SUPPORT