circuitpython/shared-bindings/storage/__init__.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2015 Josef Gajdusek
* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include "extmod/vfs_fat.h"
#include "py/obj.h"
#include "py/objnamedtuple.h"
#include "shared-bindings/storage/__init__.h"
//| :mod:`storage` --- storage management
//| ========================================================
//|
//| .. module:: storage
//| :synopsis: storage management
//| :platform: SAMD21, SAMD51
//|
//| The `storage` provides storage management functionality such as mounting and
//| unmounting which is typically handled by the operating system hosting Python.
//| CircuitPython does not have an OS, so this module provides this functionality
//| directly.
//|
//| .. function:: mount(filesystem, mount_path, \*, readonly=False)
//|
//| Mounts the given filesystem object at the given path.
//|
//| This is the CircuitPython analog to the UNIX ``mount`` command.
//|
mp_obj_t storage_mount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_readonly };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_readonly, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_false} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 2, pos_args + 2, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// get the mount point
const char *mnt_str = mp_obj_str_get_str(pos_args[1]);
// Make sure we're given an object we can mount.
// TODO(tannewt): Make sure we have all the methods we need to operating it
// as a file system.
mp_obj_t vfs_obj = pos_args[0];
mp_obj_t dest[2];
mp_load_method_maybe(vfs_obj, MP_QSTR_mount, dest);
if (dest[0] == MP_OBJ_NULL) {
mp_raise_ValueError("filesystem must provide mount method");
}
common_hal_storage_mount(vfs_obj, mnt_str, mp_obj_is_true(args[ARG_readonly].u_obj));
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(storage_mount_obj, 2, storage_mount);
//| .. function:: umount(mount)
//|
//| Unmounts the given filesystem object or if *mount* is a path, then unmount
//| the filesystem mounted at that location.
//|
//| This is the CircuitPython analog to the UNIX ``umount`` command.
//|
mp_obj_t storage_umount(mp_obj_t mnt_in) {
if (MP_OBJ_IS_STR(mnt_in)) {
common_hal_storage_umount_path(mp_obj_str_get_str(mnt_in));
} else {
common_hal_storage_umount_object(mnt_in);
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(storage_umount_obj, storage_umount);
//| .. function:: remount(mount_path, readonly=False)
//|
//| Remounts the given path with new parameters.
//|
mp_obj_t storage_remount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_readonly };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_readonly, MP_ARG_BOOL | MP_ARG_REQUIRED, {.u_bool = false} },
};
// get the mount point
const char *mnt_str = mp_obj_str_get_str(pos_args[0]);
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
common_hal_storage_remount(mnt_str, args[ARG_readonly].u_bool);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(storage_remount_obj, 1, storage_remount);
STATIC const mp_rom_map_elem_t storage_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_storage) },
{ MP_ROM_QSTR(MP_QSTR_mount), MP_ROM_PTR(&storage_mount_obj) },
{ MP_ROM_QSTR(MP_QSTR_umount), MP_ROM_PTR(&storage_umount_obj) },
{ MP_ROM_QSTR(MP_QSTR_remount), MP_ROM_PTR(&storage_remount_obj) },
//| .. class:: VfsFat(block_device)
//|
//| Create a new VfsFat filesystem around the given block device.
//|
//| :param block_device: Block device the the filesystem lives on
//|
{ MP_ROM_QSTR(MP_QSTR_VfsFat), MP_ROM_PTR(&mp_fat_vfs_type) },
};
STATIC MP_DEFINE_CONST_DICT(storage_module_globals, storage_module_globals_table);
const mp_obj_module_t storage_module = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t*)&storage_module_globals,
};