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circuitpython/extmod/vfs.c
Jim Mussared e65d1e69e8 py/modio: Remove FileIO and TextIOWrapper from io module. 
On ports with more than one filesystem, the type will be wrong, for example
if using LFS but FAT enabled, then the type will be FAT.  So it's not
possible to use these classes to identify a file object type.

Furthermore, constructing an io.FileIO currently crashes on FAT, and
make_new isn't supported on LFS.

And the io.TextIOWrapper class does not match CPython at all.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2022-07-26 17:58:01 +10:00

554 lines
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Damien P. George
*
* 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 <stdint.h>
#include <string.h>
#include "py/runtime.h"
#include "py/objstr.h"
#include "py/mperrno.h"
#include "extmod/vfs.h"
#if MICROPY_VFS
#if MICROPY_VFS_FAT
#include "extmod/vfs_fat.h"
#endif
#if MICROPY_VFS_LFS1 || MICROPY_VFS_LFS2
#include "extmod/vfs_lfs.h"
#endif
#if MICROPY_VFS_POSIX
#include "extmod/vfs_posix.h"
#endif
// For mp_vfs_proxy_call, the maximum number of additional args that can be passed.
// A fixed maximum size is used to avoid the need for a costly variable array.
#define PROXY_MAX_ARGS (2)
// path is the path to lookup and *path_out holds the path within the VFS
// object (starts with / if an absolute path).
// Returns MP_VFS_ROOT for root dir (and then path_out is undefined) and
// MP_VFS_NONE for path not found.
mp_vfs_mount_t *mp_vfs_lookup_path(const char *path, const char **path_out) {
if (*path == '/' || MP_STATE_VM(vfs_cur) == MP_VFS_ROOT) {
// an absolute path, or the current volume is root, so search root dir
bool is_abs = 0;
if (*path == '/') {
++path;
is_abs = 1;
}
if (*path == '\0') {
// path is "" or "/" so return virtual root
return MP_VFS_ROOT;
}
for (mp_vfs_mount_t *vfs = MP_STATE_VM(vfs_mount_table); vfs != NULL; vfs = vfs->next) {
size_t len = vfs->len - 1;
if (len == 0) {
*path_out = path - is_abs;
return vfs;
}
if (strncmp(path, vfs->str + 1, len) == 0) {
if (path[len] == '/') {
*path_out = path + len;
return vfs;
} else if (path[len] == '\0') {
*path_out = "/";
return vfs;
}
}
}
// if we get here then there's nothing mounted on /, so the path doesn't exist
return MP_VFS_NONE;
}
// a relative path within a mounted device
*path_out = path;
return MP_STATE_VM(vfs_cur);
}
// Version of mp_vfs_lookup_path that takes and returns uPy string objects.
STATIC mp_vfs_mount_t *lookup_path(mp_obj_t path_in, mp_obj_t *path_out) {
const char *path = mp_obj_str_get_str(path_in);
const char *p_out;
mp_vfs_mount_t *vfs = mp_vfs_lookup_path(path, &p_out);
if (vfs != MP_VFS_NONE && vfs != MP_VFS_ROOT) {
*path_out = mp_obj_new_str_of_type(mp_obj_get_type(path_in),
(const byte *)p_out, strlen(p_out));
} else {
*path_out = MP_OBJ_NULL;
}
return vfs;
}
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) {
assert(n_args <= PROXY_MAX_ARGS);
if (vfs == MP_VFS_NONE) {
// mount point not found
mp_raise_OSError(MP_ENODEV);
}
if (vfs == MP_VFS_ROOT) {
// can't do operation on root dir
mp_raise_OSError(MP_EPERM);
}
mp_obj_t meth[2 + PROXY_MAX_ARGS];
mp_load_method(vfs->obj, meth_name, meth);
if (args != NULL) {
memcpy(meth + 2, args, n_args * sizeof(*args));
}
return mp_call_method_n_kw(n_args, 0, meth);
}
mp_import_stat_t mp_vfs_import_stat(const char *path) {
const char *path_out;
mp_vfs_mount_t *vfs = mp_vfs_lookup_path(path, &path_out);
if (vfs == MP_VFS_NONE || vfs == MP_VFS_ROOT) {
return MP_IMPORT_STAT_NO_EXIST;
}
// If the mounted object has the VFS protocol, call its import_stat helper
const mp_vfs_proto_t *proto = mp_obj_get_type(vfs->obj)->protocol;
if (proto != NULL) {
return proto->import_stat(MP_OBJ_TO_PTR(vfs->obj), path_out);
}
// delegate to vfs.stat() method
mp_obj_t path_o = mp_obj_new_str(path_out, strlen(path_out));
mp_obj_t stat;
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
stat = mp_vfs_proxy_call(vfs, MP_QSTR_stat, 1, &path_o);
nlr_pop();
} else {
// assume an exception means that the path is not found
return MP_IMPORT_STAT_NO_EXIST;
}
mp_obj_t *items;
mp_obj_get_array_fixed_n(stat, 10, &items);
mp_int_t st_mode = mp_obj_get_int(items[0]);
if (st_mode & MP_S_IFDIR) {
return MP_IMPORT_STAT_DIR;
} else {
return MP_IMPORT_STAT_FILE;
}
}
STATIC mp_obj_t mp_vfs_autodetect(mp_obj_t bdev_obj) {
#if MICROPY_VFS_LFS1 || MICROPY_VFS_LFS2
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
// The superblock for littlefs is in both block 0 and 1, but block 0 may be erased
// or partially written, so search both blocks 0 and 1 for the littlefs signature.
mp_vfs_blockdev_t blockdev;
mp_vfs_blockdev_init(&blockdev, bdev_obj);
uint8_t buf[44];
for (size_t block_num = 0; block_num <= 1; ++block_num) {
mp_vfs_blockdev_read_ext(&blockdev, block_num, 8, sizeof(buf), buf);
#if MICROPY_VFS_LFS1
if (memcmp(&buf[32], "littlefs", 8) == 0) {
// LFS1
mp_obj_t vfs = mp_type_vfs_lfs1.make_new(&mp_type_vfs_lfs1, 1, 0, &bdev_obj);
nlr_pop();
return vfs;
}
#endif
#if MICROPY_VFS_LFS2
if (memcmp(&buf[0], "littlefs", 8) == 0) {
// LFS2
mp_obj_t vfs = mp_type_vfs_lfs2.make_new(&mp_type_vfs_lfs2, 1, 0, &bdev_obj);
nlr_pop();
return vfs;
}
#endif
}
nlr_pop();
} else {
// Ignore exception (eg block device doesn't support extended readblocks)
}
#endif
#if MICROPY_VFS_FAT
return mp_fat_vfs_type.make_new(&mp_fat_vfs_type, 1, 0, &bdev_obj);
#endif
// no filesystem found
mp_raise_OSError(MP_ENODEV);
}
mp_obj_t mp_vfs_mount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_readonly, ARG_mkfs };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_readonly, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_FALSE} },
{ MP_QSTR_mkfs, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_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
size_t mnt_len;
const char *mnt_str = mp_obj_str_get_data(pos_args[1], &mnt_len);
// see if we need to auto-detect and create the filesystem
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) {
// Input object has no mount method, assume it's a block device and try to
// auto-detect the filesystem and create the corresponding VFS entity.
vfs_obj = mp_vfs_autodetect(vfs_obj);
}
// create new object
mp_vfs_mount_t *vfs = m_new_obj(mp_vfs_mount_t);
vfs->str = mnt_str;
vfs->len = mnt_len;
vfs->obj = vfs_obj;
vfs->next = NULL;
// call the underlying object to do any mounting operation
mp_vfs_proxy_call(vfs, MP_QSTR_mount, 2, (mp_obj_t *)&args);
// check that the destination mount point is unused
const char *path_out;
mp_vfs_mount_t *existing_mount = mp_vfs_lookup_path(mp_obj_str_get_str(pos_args[1]), &path_out);
if (existing_mount != MP_VFS_NONE && existing_mount != MP_VFS_ROOT) {
if (vfs->len != 1 && existing_mount->len == 1) {
// if root dir is mounted, still allow to mount something within a subdir of root
} else {
// mount point in use
mp_raise_OSError(MP_EPERM);
}
}
// insert the vfs into the mount table
mp_vfs_mount_t **vfsp = &MP_STATE_VM(vfs_mount_table);
while (*vfsp != NULL) {
if ((*vfsp)->len == 1) {
// make sure anything mounted at the root stays at the end of the list
vfs->next = *vfsp;
break;
}
vfsp = &(*vfsp)->next;
}
*vfsp = vfs;
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(mp_vfs_mount_obj, 2, mp_vfs_mount);
mp_obj_t mp_vfs_umount(mp_obj_t mnt_in) {
// remove vfs from the mount table
mp_vfs_mount_t *vfs = NULL;
size_t mnt_len;
const char *mnt_str = NULL;
if (mp_obj_is_str(mnt_in)) {
mnt_str = mp_obj_str_get_data(mnt_in, &mnt_len);
}
for (mp_vfs_mount_t **vfsp = &MP_STATE_VM(vfs_mount_table); *vfsp != NULL; vfsp = &(*vfsp)->next) {
if ((mnt_str != NULL && !memcmp(mnt_str, (*vfsp)->str, mnt_len + 1)) || (*vfsp)->obj == mnt_in) {
vfs = *vfsp;
*vfsp = (*vfsp)->next;
break;
}
}
if (vfs == NULL) {
mp_raise_OSError(MP_EINVAL);
}
// if we unmounted the current device then set current to root
if (MP_STATE_VM(vfs_cur) == vfs) {
MP_STATE_VM(vfs_cur) = MP_VFS_ROOT;
}
// call the underlying object to do any unmounting operation
mp_vfs_proxy_call(vfs, MP_QSTR_umount, 0, NULL);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_vfs_umount_obj, mp_vfs_umount);
// Note: buffering and encoding args are currently ignored
mp_obj_t mp_vfs_open(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_file, ARG_mode, ARG_encoding };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_file, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_rom_obj = MP_ROM_NONE} },
{ MP_QSTR_mode, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_QSTR(MP_QSTR_r)} },
{ MP_QSTR_buffering, MP_ARG_INT, {.u_int = -1} },
{ MP_QSTR_encoding, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
#if MICROPY_VFS_POSIX
// If the file is an integer then delegate straight to the POSIX handler
if (mp_obj_is_small_int(args[ARG_file].u_obj)) {
return mp_vfs_posix_file_open(&mp_type_vfs_posix_textio, args[ARG_file].u_obj, args[ARG_mode].u_obj);
}
#endif
mp_vfs_mount_t *vfs = lookup_path(args[ARG_file].u_obj, &args[ARG_file].u_obj);
return mp_vfs_proxy_call(vfs, MP_QSTR_open, 2, (mp_obj_t *)&args);
}
MP_DEFINE_CONST_FUN_OBJ_KW(mp_vfs_open_obj, 0, mp_vfs_open);
mp_obj_t mp_vfs_chdir(mp_obj_t path_in) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path_in, &path_out);
if (vfs == MP_VFS_ROOT) {
// If we change to the root dir and a VFS is mounted at the root then
// we must change that VFS's current dir to the root dir so that any
// subsequent relative paths begin at the root of that VFS.
for (vfs = MP_STATE_VM(vfs_mount_table); vfs != NULL; vfs = vfs->next) {
if (vfs->len == 1) {
mp_obj_t root = MP_OBJ_NEW_QSTR(MP_QSTR__slash_);
mp_vfs_proxy_call(vfs, MP_QSTR_chdir, 1, &root);
break;
}
}
vfs = MP_VFS_ROOT;
} else {
mp_vfs_proxy_call(vfs, MP_QSTR_chdir, 1, &path_out);
}
MP_STATE_VM(vfs_cur) = vfs;
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_vfs_chdir_obj, mp_vfs_chdir);
mp_obj_t mp_vfs_getcwd(void) {
if (MP_STATE_VM(vfs_cur) == MP_VFS_ROOT) {
return MP_OBJ_NEW_QSTR(MP_QSTR__slash_);
}
mp_obj_t cwd_o = mp_vfs_proxy_call(MP_STATE_VM(vfs_cur), MP_QSTR_getcwd, 0, NULL);
if (MP_STATE_VM(vfs_cur)->len == 1) {
// don't prepend "/" for vfs mounted at root
return cwd_o;
}
const char *cwd = mp_obj_str_get_str(cwd_o);
vstr_t vstr;
vstr_init(&vstr, MP_STATE_VM(vfs_cur)->len + strlen(cwd) + 1);
vstr_add_strn(&vstr, MP_STATE_VM(vfs_cur)->str, MP_STATE_VM(vfs_cur)->len);
if (!(cwd[0] == '/' && cwd[1] == 0)) {
vstr_add_str(&vstr, cwd);
}
return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
}
MP_DEFINE_CONST_FUN_OBJ_0(mp_vfs_getcwd_obj, mp_vfs_getcwd);
typedef struct _mp_vfs_ilistdir_it_t {
mp_obj_base_t base;
mp_fun_1_t iternext;
union {
mp_vfs_mount_t *vfs;
mp_obj_t iter;
} cur;
bool is_str;
bool is_iter;
} mp_vfs_ilistdir_it_t;
STATIC mp_obj_t mp_vfs_ilistdir_it_iternext(mp_obj_t self_in) {
mp_vfs_ilistdir_it_t *self = MP_OBJ_TO_PTR(self_in);
if (self->is_iter) {
// continue delegating to root dir
return mp_iternext(self->cur.iter);
} else if (self->cur.vfs == NULL) {
// finished iterating mount points and no root dir is mounted
return MP_OBJ_STOP_ITERATION;
} else {
// continue iterating mount points
mp_vfs_mount_t *vfs = self->cur.vfs;
self->cur.vfs = vfs->next;
if (vfs->len == 1) {
// vfs is mounted at root dir, delegate to it
mp_obj_t root = MP_OBJ_NEW_QSTR(MP_QSTR__slash_);
self->is_iter = true;
self->cur.iter = mp_vfs_proxy_call(vfs, MP_QSTR_ilistdir, 1, &root);
return mp_iternext(self->cur.iter);
} else {
// a mounted directory
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL));
t->items[0] = mp_obj_new_str_of_type(
self->is_str ? &mp_type_str : &mp_type_bytes,
(const byte *)vfs->str + 1, vfs->len - 1);
t->items[1] = MP_OBJ_NEW_SMALL_INT(MP_S_IFDIR);
t->items[2] = MP_OBJ_NEW_SMALL_INT(0); // no inode number
return MP_OBJ_FROM_PTR(t);
}
}
}
mp_obj_t mp_vfs_ilistdir(size_t n_args, const mp_obj_t *args) {
mp_obj_t path_in;
if (n_args == 1) {
path_in = args[0];
} else {
path_in = MP_OBJ_NEW_QSTR(MP_QSTR_);
}
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path_in, &path_out);
if (vfs == MP_VFS_ROOT) {
// list the root directory
mp_vfs_ilistdir_it_t *iter = mp_obj_malloc(mp_vfs_ilistdir_it_t, &mp_type_polymorph_iter);
iter->iternext = mp_vfs_ilistdir_it_iternext;
iter->cur.vfs = MP_STATE_VM(vfs_mount_table);
iter->is_str = mp_obj_get_type(path_in) == &mp_type_str;
iter->is_iter = false;
return MP_OBJ_FROM_PTR(iter);
}
return mp_vfs_proxy_call(vfs, MP_QSTR_ilistdir, 1, &path_out);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_vfs_ilistdir_obj, 0, 1, mp_vfs_ilistdir);
mp_obj_t mp_vfs_listdir(size_t n_args, const mp_obj_t *args) {
mp_obj_t iter = mp_vfs_ilistdir(n_args, args);
mp_obj_t dir_list = mp_obj_new_list(0, NULL);
mp_obj_t next;
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
mp_obj_list_append(dir_list, mp_obj_subscr(next, MP_OBJ_NEW_SMALL_INT(0), MP_OBJ_SENTINEL));
}
return dir_list;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_vfs_listdir_obj, 0, 1, mp_vfs_listdir);
mp_obj_t mp_vfs_mkdir(mp_obj_t path_in) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path_in, &path_out);
if (vfs == MP_VFS_ROOT || (vfs != MP_VFS_NONE && !strcmp(mp_obj_str_get_str(path_out), "/"))) {
mp_raise_OSError(MP_EEXIST);
}
return mp_vfs_proxy_call(vfs, MP_QSTR_mkdir, 1, &path_out);
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_vfs_mkdir_obj, mp_vfs_mkdir);
mp_obj_t mp_vfs_remove(mp_obj_t path_in) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path_in, &path_out);
return mp_vfs_proxy_call(vfs, MP_QSTR_remove, 1, &path_out);
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_vfs_remove_obj, mp_vfs_remove);
mp_obj_t mp_vfs_rename(mp_obj_t old_path_in, mp_obj_t new_path_in) {
mp_obj_t args[2];
mp_vfs_mount_t *old_vfs = lookup_path(old_path_in, &args[0]);
mp_vfs_mount_t *new_vfs = lookup_path(new_path_in, &args[1]);
if (old_vfs != new_vfs) {
// can't rename across filesystems
mp_raise_OSError(MP_EPERM);
}
return mp_vfs_proxy_call(old_vfs, MP_QSTR_rename, 2, args);
}
MP_DEFINE_CONST_FUN_OBJ_2(mp_vfs_rename_obj, mp_vfs_rename);
mp_obj_t mp_vfs_rmdir(mp_obj_t path_in) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path_in, &path_out);
return mp_vfs_proxy_call(vfs, MP_QSTR_rmdir, 1, &path_out);
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_vfs_rmdir_obj, mp_vfs_rmdir);
mp_obj_t mp_vfs_stat(mp_obj_t path_in) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path_in, &path_out);
if (vfs == MP_VFS_ROOT) {
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(10, NULL));
t->items[0] = MP_OBJ_NEW_SMALL_INT(MP_S_IFDIR); // st_mode
for (int i = 1; i <= 9; ++i) {
t->items[i] = MP_OBJ_NEW_SMALL_INT(0); // dev, nlink, uid, gid, size, atime, mtime, ctime
}
return MP_OBJ_FROM_PTR(t);
}
return mp_vfs_proxy_call(vfs, MP_QSTR_stat, 1, &path_out);
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_vfs_stat_obj, mp_vfs_stat);
mp_obj_t mp_vfs_statvfs(mp_obj_t path_in) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path_in, &path_out);
if (vfs == MP_VFS_ROOT) {
// statvfs called on the root directory, see if there's anything mounted there
for (vfs = MP_STATE_VM(vfs_mount_table); vfs != NULL; vfs = vfs->next) {
if (vfs->len == 1) {
break;
}
}
// If there's nothing mounted at root then return a mostly-empty tuple
if (vfs == NULL) {
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(10, NULL));
// fill in: bsize, frsize, blocks, bfree, bavail, files, ffree, favail, flags
for (int i = 0; i <= 8; ++i) {
t->items[i] = MP_OBJ_NEW_SMALL_INT(0);
}
// Put something sensible in f_namemax
t->items[9] = MP_OBJ_NEW_SMALL_INT(MICROPY_ALLOC_PATH_MAX);
return MP_OBJ_FROM_PTR(t);
}
// VFS mounted at root so delegate the call to it
path_out = MP_OBJ_NEW_QSTR(MP_QSTR__slash_);
}
return mp_vfs_proxy_call(vfs, MP_QSTR_statvfs, 1, &path_out);
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_vfs_statvfs_obj, mp_vfs_statvfs);
// This is a C-level helper function for ports to use if needed.
int mp_vfs_mount_and_chdir_protected(mp_obj_t bdev, mp_obj_t mount_point) {
nlr_buf_t nlr;
mp_int_t ret = -MP_EIO;
if (nlr_push(&nlr) == 0) {
mp_obj_t args[] = { bdev, mount_point };
mp_vfs_mount(2, args, (mp_map_t *)&mp_const_empty_map);
mp_vfs_chdir(mount_point);
ret = 0; // success
nlr_pop();
} else {
mp_obj_base_t *exc = nlr.ret_val;
if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(exc->type), MP_OBJ_FROM_PTR(&mp_type_OSError))) {
mp_obj_t v = mp_obj_exception_get_value(MP_OBJ_FROM_PTR(exc));
mp_obj_get_int_maybe(v, &ret); // get errno value
ret = -ret;
}
}
return ret;
}
MP_REGISTER_ROOT_POINTER(struct _mp_vfs_mount_t *vfs_cur);
MP_REGISTER_ROOT_POINTER(struct _mp_vfs_mount_t *vfs_mount_table);
#endif // MICROPY_VFS
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