1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2015 Josef Gajdusek
* Copyright (c) 2017 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.h"
#include "py/mperrno.h"
#include "py/mpstate.h"
#include "py/obj.h"
#include "py/objstr.h"
#include "py/runtime.h"
#include "shared-bindings/os/__init__.h"
// This provides all VFS related OS functions so that ports can share the code
// as needed. It does not provide uname.
// Version of mp_vfs_lookup_path that takes and returns uPy string objects.
STATIC mp_vfs_mount_t *lookup_path(const char *path, mp_obj_t *path_out) {
const char *p_out;
*path_out = mp_const_none;
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_type_str,
(const byte *)p_out, strlen(p_out));
}
return vfs;
}
// Strip off trailing slashes to please underlying libraries
STATIC mp_vfs_mount_t *lookup_dir_path(const char *path, mp_obj_t *path_out) {
const char *p_out;
*path_out = mp_const_none;
mp_vfs_mount_t *vfs = mp_vfs_lookup_path(path, &p_out);
if (vfs != MP_VFS_NONE && vfs != MP_VFS_ROOT) {
size_t len = strlen(p_out);
while (len > 1 && p_out[len - 1] == '/') {
len--;
}
*path_out = mp_obj_new_str_of_type(&mp_type_str, (const byte *)p_out, len);
}
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) {
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[n_args + 2];
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);
}
void common_hal_os_chdir(const char *path) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_dir_path(path, &path_out);
MP_STATE_VM(vfs_cur) = vfs;
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_str("/", 1);
mp_vfs_proxy_call(vfs, MP_QSTR_chdir, 1, &root);
break;
}
}
} else {
mp_vfs_proxy_call(vfs, MP_QSTR_chdir, 1, &path_out);
}
}
mp_obj_t common_hal_os_getcwd(void) {
return mp_vfs_getcwd();
}
mp_obj_t common_hal_os_listdir(const char *path) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_dir_path(path, &path_out);
mp_vfs_ilistdir_it_t iter;
mp_obj_t iter_obj = MP_OBJ_FROM_PTR(&iter);
if (vfs == MP_VFS_ROOT) {
// list the root directory
iter.base.type = &mp_type_polymorph_iter;
iter.iternext = mp_vfs_ilistdir_it_iternext;
iter.cur.vfs = MP_STATE_VM(vfs_mount_table);
iter.is_str = true;
iter.is_iter = false;
} else {
iter_obj = mp_vfs_proxy_call(vfs, MP_QSTR_ilistdir, 1, &path_out);
}
mp_obj_t dir_list = mp_obj_new_list(0, NULL);
mp_obj_t next;
while ((next = mp_iternext(iter_obj)) != MP_OBJ_STOP_ITERATION) {
// next[0] is the filename.
mp_obj_list_append(dir_list, mp_obj_subscr(next, MP_OBJ_NEW_SMALL_INT(0), MP_OBJ_SENTINEL));
RUN_BACKGROUND_TASKS;
}
return dir_list;
}
void common_hal_os_mkdir(const char *path) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_dir_path(path, &path_out);
if (vfs == MP_VFS_ROOT || (vfs != MP_VFS_NONE && !strcmp(mp_obj_str_get_str(path_out), "/"))) {
mp_raise_OSError(MP_EEXIST);
}
mp_vfs_proxy_call(vfs, MP_QSTR_mkdir, 1, &path_out);
}
void common_hal_os_remove(const char *path) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path, &path_out);
mp_vfs_proxy_call(vfs, MP_QSTR_remove, 1, &path_out);
}
void common_hal_os_rename(const char *old_path, const char *new_path) {
mp_obj_t args[2];
mp_vfs_mount_t *old_vfs = lookup_path(old_path, &args[0]);
mp_vfs_mount_t *new_vfs = lookup_path(new_path, &args[1]);
if (old_vfs != new_vfs) {
// can't rename across filesystems
mp_raise_OSError(MP_EPERM);
}
mp_vfs_proxy_call(old_vfs, MP_QSTR_rename, 2, args);
}
void common_hal_os_rmdir(const char *path) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_dir_path(path, &path_out);
mp_vfs_proxy_call(vfs, MP_QSTR_rmdir, 1, &path_out);
}
mp_obj_t common_hal_os_stat(const char *path) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path, &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_obj_t common_hal_os_statvfs(const char *path) {
mp_obj_t path_out;
mp_vfs_mount_t *vfs = lookup_path(path, &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);
}
|
