322 int dfs_elm_open(struct dfs_fd *file)  in dfs_elm_open()  argument
331     struct dfs_filesystem *fs = (struct dfs_filesystem *)file->data;  in dfs_elm_open()
345     rt_snprintf(drivers_fn, 256, "%d:%s", vol, file->path);  in dfs_elm_open()
347     drivers_fn = file->path;  in dfs_elm_open()
350     if (file->flags & O_DIRECTORY)  in dfs_elm_open()
354         if (file->flags & O_CREAT)  in dfs_elm_open()
386         file->data = dir;  in dfs_elm_open()
393         if (file->flags & O_WRONLY)  in dfs_elm_open()
395         if ((file->flags & O_ACCMODE) & O_RDWR)  in dfs_elm_open()
397         /* Opens the file, if it is existing. If not, a new file is created. */  in dfs_elm_open()
398         if (file->flags & O_CREAT)  in dfs_elm_open()
400         /* Creates a new file. If the file is existing, it is truncated and overwritten. */  in dfs_elm_open()
401         if (file->flags & O_TRUNC)  in dfs_elm_open()
403         /* Creates a new file. The function fails if the file is already existing. */  in dfs_elm_open()
404         if (file->flags & O_EXCL)  in dfs_elm_open()
423             file->pos  = fd->fptr;  in dfs_elm_open()
424             file->size = f_size(fd);  in dfs_elm_open()
425             file->data = fd;  in dfs_elm_open()
427             if (file->flags & O_APPEND)  in dfs_elm_open()
429                 /* seek to the end of file */  in dfs_elm_open()
431                 file->pos = fd->fptr;  in dfs_elm_open()
445 int dfs_elm_close(struct dfs_fd *file)  in dfs_elm_close()  argument
450     if (file->type == FT_DIRECTORY)  in dfs_elm_close()
454         dir = (DIR *)(file->data);  in dfs_elm_close()
460     else if (file->type == FT_REGULAR)  in dfs_elm_close()
463         fd = (FIL *)(file->data);  in dfs_elm_close()
477 int dfs_elm_ioctl(struct dfs_fd *file, int cmd, void *args)  in dfs_elm_ioctl()  argument
482 int dfs_elm_read(struct dfs_fd *file, void *buf, size_t len)  in dfs_elm_read()  argument
488     if (file->type == FT_DIRECTORY)  in dfs_elm_read()
493     fd = (FIL *)(file->data);  in dfs_elm_read()
498     file->pos  = fd->fptr;  in dfs_elm_read()
505 int dfs_elm_write(struct dfs_fd *file, const void *buf, size_t len)  in dfs_elm_write()  argument
511     if (file->type == FT_DIRECTORY)  in dfs_elm_write()
516     fd = (FIL *)(file->data);  in dfs_elm_write()
520     /* update position and file size */  in dfs_elm_write()
521     file->pos  = fd->fptr;  in dfs_elm_write()
522     file->size = f_size(fd);  in dfs_elm_write()
529 int dfs_elm_flush(struct dfs_fd *file)  in dfs_elm_flush()  argument
534     fd = (FIL *)(file->data);  in dfs_elm_flush()
541 int dfs_elm_lseek(struct dfs_fd *file, rt_off_t offset)  in dfs_elm_lseek()  argument
544     if (file->type == FT_REGULAR)  in dfs_elm_lseek()
548         /* regular file type */  in dfs_elm_lseek()
549         fd = (FIL *)(file->data);  in dfs_elm_lseek()
556             file->pos = fd->fptr;  in dfs_elm_lseek()
560     else if (file->type == FT_DIRECTORY)  in dfs_elm_lseek()
565         dir = (DIR *)(file->data);  in dfs_elm_lseek()
571             /* update file position */  in dfs_elm_lseek()
572             file->pos = offset;  in dfs_elm_lseek()
573             return file->pos;  in dfs_elm_lseek()
580 int dfs_elm_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)  in dfs_elm_getdents()  argument
588     dir = (DIR *)(file->data);  in dfs_elm_getdents()
631     file->pos += index * sizeof(struct dirent);  in dfs_elm_getdents()
812     /* register fatfs file system */  in elm_init()