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micropython/stmhal/moduos.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
*
* 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/mpstate.h"
#include "py/runtime.h"
#include "py/objtuple.h"
#include "py/objstr.h"
#include "genhdr/mpversion.h"
#include "lib/fatfs/ff.h"
#include "lib/fatfs/diskio.h"
#include "timeutils.h"
#include "rng.h"
#include "uart.h"
#include "extmod/vfs_fat.h"
#include "sdcard.h"
#include "extmod/fsusermount.h"
#include "portmodules.h"
/// \module os - basic "operating system" services
///
/// The `os` module contains functions for filesystem access and `urandom`.
///
/// The filesystem has `/` as the root directory, and the available physical
/// drives are accessible from here. They are currently:
///
/// /flash -- the internal flash filesystem
/// /sd -- the SD card (if it exists)
///
/// On boot up, the current directory is `/flash` if no SD card is inserted,
/// otherwise it is `/sd`.
STATIC const qstr os_uname_info_fields[] = {
MP_QSTR_sysname, MP_QSTR_nodename,
MP_QSTR_release, MP_QSTR_version, MP_QSTR_machine
};
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_sysname_obj, "pyboard");
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_nodename_obj, "pyboard");
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_release_obj, MICROPY_VERSION_STRING);
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_version_obj, MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE);
STATIC const MP_DEFINE_STR_OBJ(os_uname_info_machine_obj, MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME);
STATIC MP_DEFINE_ATTRTUPLE(
os_uname_info_obj,
os_uname_info_fields,
5,
(mp_obj_t)&os_uname_info_sysname_obj,
(mp_obj_t)&os_uname_info_nodename_obj,
(mp_obj_t)&os_uname_info_release_obj,
(mp_obj_t)&os_uname_info_version_obj,
(mp_obj_t)&os_uname_info_machine_obj
);
STATIC mp_obj_t os_uname(void) {
return (mp_obj_t)&os_uname_info_obj;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(os_uname_obj, os_uname);
/// \function chdir(path)
/// Change current directory.
STATIC mp_obj_t os_chdir(mp_obj_t path_in) {
const char *path;
path = mp_obj_str_get_str(path_in);
FRESULT res = f_chdrive(path);
if (res == FR_OK) {
res = f_chdir(path);
}
if (res != FR_OK) {
// TODO should be mp_type_FileNotFoundError
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "No such file or directory: '%s'", path));
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_chdir_obj, os_chdir);
/// \function getcwd()
/// Get the current directory.
STATIC mp_obj_t os_getcwd(void) {
char buf[MICROPY_ALLOC_PATH_MAX + 1];
FRESULT res = f_getcwd(buf, sizeof buf);
if (res != FR_OK) {
mp_raise_OSError(fresult_to_errno_table[res]);
}
return mp_obj_new_str(buf, strlen(buf), false);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(os_getcwd_obj, os_getcwd);
/// \function listdir([dir])
/// With no argument, list the current directory. Otherwise list the given directory.
STATIC mp_obj_t os_listdir(mp_uint_t n_args, const mp_obj_t *args) {
bool is_str_type = true;
const char *path;
if (n_args == 1) {
if (mp_obj_get_type(args[0]) == &mp_type_bytes) {
is_str_type = false;
}
path = mp_obj_str_get_str(args[0]);
} else {
path = "";
}
// "hack" to list root directory
if (path[0] == '/' && path[1] == '\0') {
mp_obj_t dir_list = mp_obj_new_list(0, NULL);
for (size_t i = 0; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
if (vfs != NULL) {
mp_obj_list_append(dir_list, mp_obj_new_str(vfs->str + 1, vfs->len - 1, false));
}
}
return dir_list;
}
return fat_vfs_listdir(path, is_str_type);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(os_listdir_obj, 0, 1, os_listdir);
/// \function mkdir(path)
/// Create a new directory.
STATIC mp_obj_t os_mkdir(mp_obj_t path_o) {
const char *path = mp_obj_str_get_str(path_o);
FRESULT res = f_mkdir(path);
switch (res) {
case FR_OK:
return mp_const_none;
case FR_EXIST:
// TODO should be FileExistsError
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "File exists: '%s'", path));
default:
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "Error creating directory '%s'", path));
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_mkdir_obj, os_mkdir);
/// \function remove(path)
/// Remove a file.
STATIC mp_obj_t os_remove(mp_obj_t path_o) {
const char *path = mp_obj_str_get_str(path_o);
// TODO check that path is actually a file before trying to unlink it
FRESULT res = f_unlink(path);
switch (res) {
case FR_OK:
return mp_const_none;
default:
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "Error removing file '%s'", path));
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_remove_obj, os_remove);
/// \function rename(old_path, new_path)
/// Rename a file
STATIC mp_obj_t os_rename(mp_obj_t path_in, mp_obj_t path_out) {
const char *old_path = mp_obj_str_get_str(path_in);
const char *new_path = mp_obj_str_get_str(path_out);
FRESULT res = f_rename(old_path, new_path);
if (res == FR_EXIST) {
// if new_path exists then try removing it
res = f_unlink(new_path);
if (res == FR_OK) {
// try to rename again
res = f_rename(old_path, new_path);
}
}
switch (res) {
case FR_OK:
return mp_const_none;
default:
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "Error renaming file '%s' to '%s'", old_path, new_path));
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(os_rename_obj, os_rename);
/// \function rmdir(path)
/// Remove a directory.
STATIC mp_obj_t os_rmdir(mp_obj_t path_o) {
const char *path = mp_obj_str_get_str(path_o);
// TODO check that path is actually a directory before trying to unlink it
FRESULT res = f_unlink(path);
switch (res) {
case FR_OK:
return mp_const_none;
default:
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "Error removing directory '%s'", path));
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_rmdir_obj, os_rmdir);
// Checks for path equality, ignoring trailing slashes:
// path_equal(/, /) -> true
// path_equal(/flash//, /flash) -> true
// second argument must be in canonical form (meaning no trailing slash, unless it's just /)
STATIC bool path_equal(const char *path, const char *path_canonical) {
for (; *path_canonical != '\0' && *path == *path_canonical; ++path, ++path_canonical) {
}
if (*path_canonical != '\0') {
return false;
}
for (; *path == '/'; ++path) {
}
return *path == '\0';
}
/// \function stat(path)
/// Get the status of a file or directory.
STATIC mp_obj_t os_stat(mp_obj_t path_in) {
const char *path = mp_obj_str_get_str(path_in);
FILINFO fno;
#if _USE_LFN
fno.lfname = NULL;
fno.lfsize = 0;
#endif
FRESULT res;
if (path_equal(path, "/")) {
// stat root directory
fno.fsize = 0;
fno.fdate = 0;
fno.ftime = 0;
fno.fattrib = AM_DIR;
} else {
res = FR_NO_PATH;
for (size_t i = 0; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
if (vfs != NULL && path_equal(path, vfs->str)) {
// stat mounted device directory
fno.fsize = 0;
fno.fdate = 0;
fno.ftime = 0;
fno.fattrib = AM_DIR;
res = FR_OK;
}
}
if (res == FR_NO_PATH) {
// stat normal file
res = f_stat(path, &fno);
}
if (res != FR_OK) {
mp_raise_OSError(fresult_to_errno_table[res]);
}
}
mp_obj_tuple_t *t = mp_obj_new_tuple(10, NULL);
mp_int_t mode = 0;
if (fno.fattrib & AM_DIR) {
mode |= 0x4000; // stat.S_IFDIR
} else {
mode |= 0x8000; // stat.S_IFREG
}
mp_int_t seconds = timeutils_seconds_since_2000(
1980 + ((fno.fdate >> 9) & 0x7f),
(fno.fdate >> 5) & 0x0f,
fno.fdate & 0x1f,
(fno.ftime >> 11) & 0x1f,
(fno.ftime >> 5) & 0x3f,
2 * (fno.ftime & 0x1f)
);
t->items[0] = MP_OBJ_NEW_SMALL_INT(mode); // st_mode
t->items[1] = MP_OBJ_NEW_SMALL_INT(0); // st_ino
t->items[2] = MP_OBJ_NEW_SMALL_INT(0); // st_dev
t->items[3] = MP_OBJ_NEW_SMALL_INT(0); // st_nlink
t->items[4] = MP_OBJ_NEW_SMALL_INT(0); // st_uid
t->items[5] = MP_OBJ_NEW_SMALL_INT(0); // st_gid
t->items[6] = MP_OBJ_NEW_SMALL_INT(fno.fsize); // st_size
t->items[7] = MP_OBJ_NEW_SMALL_INT(seconds); // st_atime
t->items[8] = MP_OBJ_NEW_SMALL_INT(seconds); // st_mtime
t->items[9] = MP_OBJ_NEW_SMALL_INT(seconds); // st_ctime
return t;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_stat_obj, os_stat);
STATIC mp_obj_t os_statvfs(mp_obj_t path_in) {
const char *path = mp_obj_str_get_str(path_in);
DWORD nclst;
FATFS *fatfs;
FRESULT res = f_getfree(path, &nclst, &fatfs);
if (res != FR_OK) {
goto error;
}
mp_obj_tuple_t *t = mp_obj_new_tuple(10, NULL);
t->items[0] = MP_OBJ_NEW_SMALL_INT(fatfs->csize * 512); // f_bsize - block size
t->items[1] = t->items[0]; // f_frsize - fragment size
t->items[2] = MP_OBJ_NEW_SMALL_INT((fatfs->n_fatent - 2) * fatfs->csize); // f_blocks - total number of blocks
t->items[3] = MP_OBJ_NEW_SMALL_INT(nclst); // f_bfree - number of free blocks
t->items[4] = t->items[3]; // f_bavail - free blocks avail to unpriviledged users
t->items[5] = MP_OBJ_NEW_SMALL_INT(0); // f_files - # inodes
t->items[6] = MP_OBJ_NEW_SMALL_INT(0); // f_ffree - # free inodes
t->items[7] = MP_OBJ_NEW_SMALL_INT(0); // f_favail - # free inodes avail to unpriviledges users
t->items[8] = MP_OBJ_NEW_SMALL_INT(0); // f_flags
t->items[9] = MP_OBJ_NEW_SMALL_INT(_MAX_LFN); // f_namemax
return t;
error:
mp_raise_OSError(fresult_to_errno_table[res]);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_statvfs_obj, os_statvfs);
/// \function sync()
/// Sync all filesystems.
STATIC mp_obj_t os_sync(void) {
disk_ioctl(0, CTRL_SYNC, NULL);
disk_ioctl(1, CTRL_SYNC, NULL);
disk_ioctl(2, CTRL_SYNC, NULL);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(mod_os_sync_obj, os_sync);
#if MICROPY_HW_ENABLE_RNG
/// \function urandom(n)
/// Return a bytes object with n random bytes, generated by the hardware
/// random number generator.
STATIC mp_obj_t os_urandom(mp_obj_t num) {
mp_int_t n = mp_obj_get_int(num);
vstr_t vstr;
vstr_init_len(&vstr, n);
for (int i = 0; i < n; i++) {
vstr.buf[i] = rng_get();
}
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_urandom_obj, os_urandom);
#endif
// Get or set the UART object that the REPL is repeated on.
// TODO should accept any object with read/write methods.
STATIC mp_obj_t os_dupterm(mp_uint_t n_args, const mp_obj_t *args) {
if (n_args == 0) {
if (MP_STATE_PORT(pyb_stdio_uart) == NULL) {
return mp_const_none;
} else {
return MP_STATE_PORT(pyb_stdio_uart);
}
} else {
if (args[0] == mp_const_none) {
MP_STATE_PORT(pyb_stdio_uart) = NULL;
} else if (mp_obj_get_type(args[0]) == &pyb_uart_type) {
MP_STATE_PORT(pyb_stdio_uart) = args[0];
} else {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "need a UART object"));
}
return mp_const_none;
}
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_os_dupterm_obj, 0, 1, os_dupterm);
STATIC const mp_map_elem_t os_module_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_uos) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_uname), (mp_obj_t)&os_uname_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_chdir), (mp_obj_t)&os_chdir_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_getcwd), (mp_obj_t)&os_getcwd_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_listdir), (mp_obj_t)&os_listdir_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_mkdir), (mp_obj_t)&os_mkdir_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_remove), (mp_obj_t)&os_remove_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_rename),(mp_obj_t)&os_rename_obj},
{ MP_OBJ_NEW_QSTR(MP_QSTR_rmdir), (mp_obj_t)&os_rmdir_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_stat), (mp_obj_t)&os_stat_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_statvfs), (mp_obj_t)&os_statvfs_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_unlink), (mp_obj_t)&os_remove_obj }, // unlink aliases to remove
{ MP_OBJ_NEW_QSTR(MP_QSTR_sync), (mp_obj_t)&mod_os_sync_obj },
/// \constant sep - separation character used in paths
{ MP_OBJ_NEW_QSTR(MP_QSTR_sep), MP_OBJ_NEW_QSTR(MP_QSTR__slash_) },
#if MICROPY_HW_ENABLE_RNG
{ MP_OBJ_NEW_QSTR(MP_QSTR_urandom), (mp_obj_t)&os_urandom_obj },
#endif
// these are MicroPython extensions
{ MP_OBJ_NEW_QSTR(MP_QSTR_dupterm), (mp_obj_t)&mod_os_dupterm_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_mount), (mp_obj_t)&fsuser_mount_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_umount), (mp_obj_t)&fsuser_umount_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_mkfs), (mp_obj_t)&fsuser_mkfs_obj },
};
STATIC MP_DEFINE_CONST_DICT(os_module_globals, os_module_globals_table);
const mp_obj_module_t mp_module_uos = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t*)&os_module_globals,
};
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