222 lines
7.8 KiB
C
222 lines
7.8 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
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* Copyright (c) 2015 Josef Gajdusek
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* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include "extmod/vfs.h"
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#include "py/mperrno.h"
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#include "py/mpstate.h"
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#include "py/obj.h"
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#include "py/objstr.h"
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#include "py/runtime.h"
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#include "shared-bindings/os/__init__.h"
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// This provides all VFS related OS functions so that ports can share the code
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// as needed. It does not provide uname.
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// Version of mp_vfs_lookup_path that takes and returns uPy string objects.
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STATIC mp_vfs_mount_t *lookup_path(const char *path, mp_obj_t *path_out) {
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const char *p_out;
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*path_out = mp_const_none;
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mp_vfs_mount_t *vfs = mp_vfs_lookup_path(path, &p_out);
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if (vfs != MP_VFS_NONE && vfs != MP_VFS_ROOT) {
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*path_out = mp_obj_new_str_of_type(&mp_type_str,
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(const byte *)p_out, strlen(p_out));
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}
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return vfs;
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}
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// Strip off trailing slashes to please underlying libraries
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STATIC mp_vfs_mount_t *lookup_dir_path(const char *path, mp_obj_t *path_out) {
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const char *p_out;
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*path_out = mp_const_none;
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mp_vfs_mount_t *vfs = mp_vfs_lookup_path(path, &p_out);
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if (vfs != MP_VFS_NONE && vfs != MP_VFS_ROOT) {
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size_t len = strlen(p_out);
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while (len > 1 && p_out[len - 1] == '/') {
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len--;
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}
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*path_out = mp_obj_new_str_of_type(&mp_type_str, (const byte *)p_out, len);
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}
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return vfs;
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}
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STATIC mp_obj_t mp_vfs_proxy_call(mp_vfs_mount_t *vfs, qstr meth_name, size_t n_args, const mp_obj_t *args) {
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if (vfs == MP_VFS_NONE) {
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// mount point not found
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mp_raise_OSError(MP_ENODEV);
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}
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if (vfs == MP_VFS_ROOT) {
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// can't do operation on root dir
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mp_raise_OSError(MP_EPERM);
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}
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mp_obj_t meth[n_args + 2];
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mp_load_method(vfs->obj, meth_name, meth);
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if (args != NULL) {
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memcpy(meth + 2, args, n_args * sizeof(*args));
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}
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return mp_call_method_n_kw(n_args, 0, meth);
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}
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void common_hal_os_chdir(const char *path) {
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mp_obj_t path_out;
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mp_vfs_mount_t *vfs = lookup_dir_path(path, &path_out);
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MP_STATE_VM(vfs_cur) = vfs;
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if (vfs == MP_VFS_ROOT) {
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// If we change to the root dir and a VFS is mounted at the root then
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// we must change that VFS's current dir to the root dir so that any
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// subsequent relative paths begin at the root of that VFS.
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for (vfs = MP_STATE_VM(vfs_mount_table); vfs != NULL; vfs = vfs->next) {
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if (vfs->len == 1) {
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mp_obj_t root = mp_obj_new_str("/", 1);
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mp_vfs_proxy_call(vfs, MP_QSTR_chdir, 1, &root);
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break;
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}
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}
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} else {
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mp_vfs_proxy_call(vfs, MP_QSTR_chdir, 1, &path_out);
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}
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}
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mp_obj_t common_hal_os_getcwd(void) {
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return mp_vfs_getcwd();
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}
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mp_obj_t common_hal_os_listdir(const char *path) {
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mp_obj_t path_out;
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mp_vfs_mount_t *vfs = lookup_dir_path(path, &path_out);
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mp_vfs_ilistdir_it_t iter;
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mp_obj_t iter_obj = MP_OBJ_FROM_PTR(&iter);
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if (vfs == MP_VFS_ROOT) {
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// list the root directory
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iter.base.type = &mp_type_polymorph_iter;
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iter.iternext = mp_vfs_ilistdir_it_iternext;
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iter.cur.vfs = MP_STATE_VM(vfs_mount_table);
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iter.is_str = true;
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iter.is_iter = false;
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} else {
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iter_obj = mp_vfs_proxy_call(vfs, MP_QSTR_ilistdir, 1, &path_out);
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}
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mp_obj_t dir_list = mp_obj_new_list(0, NULL);
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mp_obj_t next;
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while ((next = mp_iternext(iter_obj)) != MP_OBJ_STOP_ITERATION) {
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// next[0] is the filename.
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mp_obj_list_append(dir_list, mp_obj_subscr(next, MP_OBJ_NEW_SMALL_INT(0), MP_OBJ_SENTINEL));
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RUN_BACKGROUND_TASKS;
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}
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return dir_list;
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}
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void common_hal_os_mkdir(const char *path) {
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mp_obj_t path_out;
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mp_vfs_mount_t *vfs = lookup_dir_path(path, &path_out);
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if (vfs == MP_VFS_ROOT || (vfs != MP_VFS_NONE && !strcmp(mp_obj_str_get_str(path_out), "/"))) {
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mp_raise_OSError(MP_EEXIST);
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}
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mp_vfs_proxy_call(vfs, MP_QSTR_mkdir, 1, &path_out);
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}
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void common_hal_os_remove(const char *path) {
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mp_obj_t path_out;
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mp_vfs_mount_t *vfs = lookup_path(path, &path_out);
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mp_vfs_proxy_call(vfs, MP_QSTR_remove, 1, &path_out);
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}
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void common_hal_os_rename(const char *old_path, const char *new_path) {
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mp_obj_t args[2];
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mp_vfs_mount_t *old_vfs = lookup_path(old_path, &args[0]);
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mp_vfs_mount_t *new_vfs = lookup_path(new_path, &args[1]);
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if (old_vfs != new_vfs) {
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// can't rename across filesystems
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mp_raise_OSError(MP_EPERM);
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}
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mp_vfs_proxy_call(old_vfs, MP_QSTR_rename, 2, args);
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}
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void common_hal_os_rmdir(const char *path) {
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mp_obj_t path_out;
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mp_vfs_mount_t *vfs = lookup_dir_path(path, &path_out);
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mp_vfs_proxy_call(vfs, MP_QSTR_rmdir, 1, &path_out);
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}
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mp_obj_t common_hal_os_stat(const char *path) {
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mp_obj_t path_out;
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mp_vfs_mount_t *vfs = lookup_path(path, &path_out);
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if (vfs == MP_VFS_ROOT) {
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mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(10, NULL));
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t->items[0] = MP_OBJ_NEW_SMALL_INT(MP_S_IFDIR); // st_mode
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for (int i = 1; i <= 9; ++i) {
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t->items[i] = MP_OBJ_NEW_SMALL_INT(0); // dev, nlink, uid, gid, size, atime, mtime, ctime
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}
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return MP_OBJ_FROM_PTR(t);
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}
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return mp_vfs_proxy_call(vfs, MP_QSTR_stat, 1, &path_out);
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}
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mp_obj_t common_hal_os_statvfs(const char *path) {
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mp_obj_t path_out;
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mp_vfs_mount_t *vfs = lookup_path(path, &path_out);
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if (vfs == MP_VFS_ROOT) {
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// statvfs called on the root directory, see if there's anything mounted there
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for (vfs = MP_STATE_VM(vfs_mount_table); vfs != NULL; vfs = vfs->next) {
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if (vfs->len == 1) {
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break;
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}
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}
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// If there's nothing mounted at root then return a mostly-empty tuple
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if (vfs == NULL) {
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mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(10, NULL));
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// fill in: bsize, frsize, blocks, bfree, bavail, files, ffree, favail, flags
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for (int i = 0; i <= 8; ++i) {
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t->items[i] = MP_OBJ_NEW_SMALL_INT(0);
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}
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// Put something sensible in f_namemax
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t->items[9] = MP_OBJ_NEW_SMALL_INT(MICROPY_ALLOC_PATH_MAX);
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return MP_OBJ_FROM_PTR(t);
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}
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// VFS mounted at root so delegate the call to it
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path_out = MP_OBJ_NEW_QSTR(MP_QSTR__slash_);
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}
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return mp_vfs_proxy_call(vfs, MP_QSTR_statvfs, 1, &path_out);
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}
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void common_hal_os_utime(const char *path, mp_obj_t times) {
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mp_obj_t args[2];
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mp_vfs_mount_t *vfs = lookup_path(path, &args[0]);
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args[1] = times;
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mp_vfs_proxy_call(vfs, MP_QSTR_utime, 2, args);
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}
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