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circuitpython/extmod/vfs_posix.c

365 lines
13 KiB

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017-2018 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 "py/runtime.h"
#include "py/mperrno.h"
#include "extmod/vfs.h"
#include "extmod/vfs_posix.h"
#if defined(MICROPY_VFS_POSIX) && MICROPY_VFS_POSIX
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <dirent.h>
typedef struct _mp_obj_vfs_posix_t {
mp_obj_base_t base;
vstr_t root;
size_t root_len;
bool readonly;
} mp_obj_vfs_posix_t;
STATIC const char *vfs_posix_get_path_str(mp_obj_vfs_posix_t *self, mp_obj_t path) {
if (self->root_len == 0) {
return mp_obj_str_get_str(path);
} else {
self->root.len = self->root_len;
vstr_add_str(&self->root, mp_obj_str_get_str(path));
return vstr_null_terminated_str(&self->root);
}
}
STATIC mp_obj_t vfs_posix_get_path_obj(mp_obj_vfs_posix_t *self, mp_obj_t path) {
if (self->root_len == 0) {
return path;
} else {
self->root.len = self->root_len;
vstr_add_str(&self->root, mp_obj_str_get_str(path));
return mp_obj_new_str(self->root.buf, self->root.len);
}
}
STATIC mp_obj_t vfs_posix_fun1_helper(mp_obj_t self_in, mp_obj_t path_in, int (*f)(const char*)) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
int ret = f(vfs_posix_get_path_str(self, path_in));
if (ret != 0) {
mp_raise_OSError(errno);
}
return mp_const_none;
}
STATIC mp_import_stat_t mp_vfs_posix_import_stat(void *self_in, const char *path) {
mp_obj_vfs_posix_t *self = self_in;
if (self->root_len != 0) {
self->root.len = self->root_len;
vstr_add_str(&self->root, path);
path = vstr_null_terminated_str(&self->root);
}
struct stat st;
if (stat(path, &st) == 0) {
if (S_ISDIR(st.st_mode)) {
return MP_IMPORT_STAT_DIR;
} else if (S_ISREG(st.st_mode)) {
return MP_IMPORT_STAT_FILE;
}
}
return MP_IMPORT_STAT_NO_EXIST;
}
STATIC mp_obj_t vfs_posix_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
mp_arg_check_num(n_args, kw_args, 0, 1, false);
mp_obj_vfs_posix_t *vfs = m_new_obj(mp_obj_vfs_posix_t);
vfs->base.type = type;
vstr_init(&vfs->root, 0);
if (n_args == 1) {
vstr_add_str(&vfs->root, mp_obj_str_get_str(args[0]));
vstr_add_char(&vfs->root, '/');
}
vfs->root_len = vfs->root.len;
vfs->readonly = false;
return MP_OBJ_FROM_PTR(vfs);
}
STATIC mp_obj_t vfs_posix_mount(mp_obj_t self_in, mp_obj_t readonly, mp_obj_t mkfs) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
if (mp_obj_is_true(readonly)) {
self->readonly = true;
}
if (mp_obj_is_true(mkfs)) {
mp_raise_OSError(MP_EPERM);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(vfs_posix_mount_obj, vfs_posix_mount);
STATIC mp_obj_t vfs_posix_umount(mp_obj_t self_in) {
(void)self_in;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(vfs_posix_umount_obj, vfs_posix_umount);
STATIC mp_obj_t vfs_posix_open(mp_obj_t self_in, mp_obj_t path_in, mp_obj_t mode_in) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
const char *mode = mp_obj_str_get_str(mode_in);
if (self->readonly
&& (strchr(mode, 'w') != NULL || strchr(mode, 'a') != NULL || strchr(mode, '+') != NULL)) {
mp_raise_OSError(MP_EROFS);
}
if (!MP_OBJ_IS_SMALL_INT(path_in)) {
path_in = vfs_posix_get_path_obj(self, path_in);
}
return mp_vfs_posix_file_open(&mp_type_textio, path_in, mode_in);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(vfs_posix_open_obj, vfs_posix_open);
STATIC mp_obj_t vfs_posix_chdir(mp_obj_t self_in, mp_obj_t path_in) {
return vfs_posix_fun1_helper(self_in, path_in, chdir);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(vfs_posix_chdir_obj, vfs_posix_chdir);
STATIC mp_obj_t vfs_posix_getcwd(mp_obj_t self_in) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
char buf[MICROPY_ALLOC_PATH_MAX + 1];
const char *ret = getcwd(buf, sizeof(buf));
if (ret == NULL) {
mp_raise_OSError(errno);
}
ret += self->root_len;
return mp_obj_new_str(ret, strlen(ret));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(vfs_posix_getcwd_obj, vfs_posix_getcwd);
typedef struct _vfs_posix_ilistdir_it_t {
mp_obj_base_t base;
mp_fun_1_t iternext;
bool is_str;
DIR *dir;
} vfs_posix_ilistdir_it_t;
STATIC mp_obj_t vfs_posix_ilistdir_it_iternext(mp_obj_t self_in) {
vfs_posix_ilistdir_it_t *self = MP_OBJ_TO_PTR(self_in);
if (self->dir == NULL) {
return MP_OBJ_STOP_ITERATION;
}
for (;;) {
struct dirent *dirent = readdir(self->dir);
if (dirent == NULL) {
closedir(self->dir);
self->dir = NULL;
return MP_OBJ_STOP_ITERATION;
}
const char *fn = dirent->d_name;
if (fn[0] == '.' && (fn[1] == 0 || fn[1] == '.')) {
// skip . and ..
continue;
}
// make 3-tuple with info about this entry
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL));
if (self->is_str) {
t->items[0] = mp_obj_new_str(fn, strlen(fn));
} else {
t->items[0] = mp_obj_new_bytes((const byte*)fn, strlen(fn));
}
#ifdef _DIRENT_HAVE_D_TYPE
if (dirent->d_type == DT_DIR) {
t->items[1] = MP_OBJ_NEW_SMALL_INT(MP_S_IFDIR);
} else if (dirent->d_type == DT_REG) {
t->items[1] = MP_OBJ_NEW_SMALL_INT(MP_S_IFREG);
} else {
t->items[1] = MP_OBJ_NEW_SMALL_INT(dirent->d_type);
}
#else
// DT_UNKNOWN should have 0 value on any reasonable system
t->items[1] = MP_OBJ_NEW_SMALL_INT(0);
#endif
#ifdef _DIRENT_HAVE_D_INO
t->items[2] = MP_OBJ_NEW_SMALL_INT(dirent->d_ino);
#else
t->items[2] = MP_OBJ_NEW_SMALL_INT(0);
#endif
return MP_OBJ_FROM_PTR(t);
}
}
STATIC mp_obj_t vfs_posix_ilistdir(mp_obj_t self_in, mp_obj_t path_in) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
vfs_posix_ilistdir_it_t *iter = m_new_obj(vfs_posix_ilistdir_it_t);
iter->base.type = &mp_type_polymorph_iter;
iter->iternext = vfs_posix_ilistdir_it_iternext;
iter->is_str = mp_obj_get_type(path_in) == &mp_type_str;
const char *path = vfs_posix_get_path_str(self, path_in);
iter->dir = opendir(path);
if (iter->dir == NULL) {
mp_raise_OSError(errno);
}
return MP_OBJ_FROM_PTR(iter);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(vfs_posix_ilistdir_obj, vfs_posix_ilistdir);
typedef struct _mp_obj_listdir_t {
mp_obj_base_t base;
mp_fun_1_t iternext;
DIR *dir;
} mp_obj_listdir_t;
STATIC mp_obj_t vfs_posix_mkdir(mp_obj_t self_in, mp_obj_t path_in) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
int ret = mkdir(vfs_posix_get_path_str(self, path_in), 0777);
if (ret != 0) {
mp_raise_OSError(errno);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(vfs_posix_mkdir_obj, vfs_posix_mkdir);
STATIC mp_obj_t vfs_posix_remove(mp_obj_t self_in, mp_obj_t path_in) {
return vfs_posix_fun1_helper(self_in, path_in, unlink);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(vfs_posix_remove_obj, vfs_posix_remove);
STATIC mp_obj_t vfs_posix_rename(mp_obj_t self_in, mp_obj_t old_path_in, mp_obj_t new_path_in) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
const char *old_path = vfs_posix_get_path_str(self, old_path_in);
const char *new_path = vfs_posix_get_path_str(self, new_path_in);
int ret = rename(old_path, new_path);
if (ret != 0) {
mp_raise_OSError(errno);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(vfs_posix_rename_obj, vfs_posix_rename);
STATIC mp_obj_t vfs_posix_rmdir(mp_obj_t self_in, mp_obj_t path_in) {
return vfs_posix_fun1_helper(self_in, path_in, rmdir);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(vfs_posix_rmdir_obj, vfs_posix_rmdir);
STATIC mp_obj_t vfs_posix_stat(mp_obj_t self_in, mp_obj_t path_in) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
struct stat sb;
int ret = stat(vfs_posix_get_path_str(self, path_in), &sb);
if (ret != 0) {
mp_raise_OSError(errno);
}
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(10, NULL));
t->items[0] = MP_OBJ_NEW_SMALL_INT(sb.st_mode);
t->items[1] = MP_OBJ_NEW_SMALL_INT(sb.st_ino);
t->items[2] = MP_OBJ_NEW_SMALL_INT(sb.st_dev);
t->items[3] = MP_OBJ_NEW_SMALL_INT(sb.st_nlink);
t->items[4] = MP_OBJ_NEW_SMALL_INT(sb.st_uid);
t->items[5] = MP_OBJ_NEW_SMALL_INT(sb.st_gid);
t->items[6] = MP_OBJ_NEW_SMALL_INT(sb.st_size);
t->items[7] = MP_OBJ_NEW_SMALL_INT(sb.st_atime);
t->items[8] = MP_OBJ_NEW_SMALL_INT(sb.st_mtime);
t->items[9] = MP_OBJ_NEW_SMALL_INT(sb.st_ctime);
return MP_OBJ_FROM_PTR(t);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(vfs_posix_stat_obj, vfs_posix_stat);
#ifdef __ANDROID__
#define USE_STATFS 1
#endif
#if USE_STATFS
#include <sys/vfs.h>
#define STRUCT_STATVFS struct statfs
#define STATVFS statfs
#define F_FAVAIL sb.f_ffree
#define F_NAMEMAX sb.f_namelen
#define F_FLAG sb.f_flags
#else
#include <sys/statvfs.h>
#define STRUCT_STATVFS struct statvfs
#define STATVFS statvfs
#define F_FAVAIL sb.f_favail
#define F_NAMEMAX sb.f_namemax
#define F_FLAG sb.f_flag
#endif
STATIC mp_obj_t vfs_posix_statvfs(mp_obj_t self_in, mp_obj_t path_in) {
mp_obj_vfs_posix_t *self = MP_OBJ_TO_PTR(self_in);
STRUCT_STATVFS sb;
const char *path = vfs_posix_get_path_str(self, path_in);
int ret = STATVFS(path, &sb);
if (ret != 0) {
mp_raise_OSError(errno);
}
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(10, NULL));
t->items[0] = MP_OBJ_NEW_SMALL_INT(sb.f_bsize);
t->items[1] = MP_OBJ_NEW_SMALL_INT(sb.f_frsize);
t->items[2] = MP_OBJ_NEW_SMALL_INT(sb.f_blocks);
t->items[3] = MP_OBJ_NEW_SMALL_INT(sb.f_bfree);
t->items[4] = MP_OBJ_NEW_SMALL_INT(sb.f_bavail);
t->items[5] = MP_OBJ_NEW_SMALL_INT(sb.f_files);
t->items[6] = MP_OBJ_NEW_SMALL_INT(sb.f_ffree);
t->items[7] = MP_OBJ_NEW_SMALL_INT(F_FAVAIL);
t->items[8] = MP_OBJ_NEW_SMALL_INT(F_FLAG);
t->items[9] = MP_OBJ_NEW_SMALL_INT(F_NAMEMAX);
return MP_OBJ_FROM_PTR(t);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(vfs_posix_statvfs_obj, vfs_posix_statvfs);
STATIC const mp_rom_map_elem_t vfs_posix_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_mount), MP_ROM_PTR(&vfs_posix_mount_obj) },
{ MP_ROM_QSTR(MP_QSTR_umount), MP_ROM_PTR(&vfs_posix_umount_obj) },
{ MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&vfs_posix_open_obj) },
{ MP_ROM_QSTR(MP_QSTR_chdir), MP_ROM_PTR(&vfs_posix_chdir_obj) },
{ MP_ROM_QSTR(MP_QSTR_getcwd), MP_ROM_PTR(&vfs_posix_getcwd_obj) },
{ MP_ROM_QSTR(MP_QSTR_ilistdir), MP_ROM_PTR(&vfs_posix_ilistdir_obj) },
{ MP_ROM_QSTR(MP_QSTR_mkdir), MP_ROM_PTR(&vfs_posix_mkdir_obj) },
{ MP_ROM_QSTR(MP_QSTR_remove), MP_ROM_PTR(&vfs_posix_remove_obj) },
{ MP_ROM_QSTR(MP_QSTR_rename), MP_ROM_PTR(&vfs_posix_rename_obj) },
{ MP_ROM_QSTR(MP_QSTR_rmdir), MP_ROM_PTR(&vfs_posix_rmdir_obj) },
{ MP_ROM_QSTR(MP_QSTR_stat), MP_ROM_PTR(&vfs_posix_stat_obj) },
{ MP_ROM_QSTR(MP_QSTR_statvfs), MP_ROM_PTR(&vfs_posix_statvfs_obj) },
};
STATIC MP_DEFINE_CONST_DICT(vfs_posix_locals_dict, vfs_posix_locals_dict_table);
STATIC const mp_vfs_proto_t vfs_posix_proto = {
MP_PROTO_IMPLEMENT(MP_QSTR_protocol_vfs)
.import_stat = mp_vfs_posix_import_stat,
};
const mp_obj_type_t mp_type_vfs_posix = {
{ &mp_type_type },
.name = MP_QSTR_VfsPosix,
.make_new = vfs_posix_make_new,
.protocol = &vfs_posix_proto,
.locals_dict = (mp_obj_dict_t*)&vfs_posix_locals_dict,
};
#endif // MICROPY_VFS_POSIX