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
|
# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2024 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import sys
import os
import stat
import pwd
import grp
import shutil
import subprocess
from os.path import join # pylint: disable=ungrouped-imports
from os.path import exists # pylint: disable=ungrouped-imports
from ...fstab import Partition
from ...fstab import find_msd
from ...fstab import find_pst
# =====
def _log(msg: str) -> None:
print(msg, file=sys.stderr)
def _remount(path: str, rw: bool) -> None:
mode = ("rw" if rw else "ro")
_log(f"Remounting {path} to {mode.upper()}-mode ...")
try:
subprocess.check_call(["/bin/mount", "--options", f"remount,{mode}", path])
except subprocess.CalledProcessError as err:
raise SystemExit(f"Can't remount: {err}")
def _mkdir(path: str) -> None:
if not exists(path):
_log(f"MKDIR --- {path}")
try:
os.mkdir(path)
except Exception as err:
raise SystemExit(f"Can't create directory: {err}")
def _rmtree(path: str) -> None:
if exists(path):
_log(f"RMALL --- {path}")
try:
shutil.rmtree(path)
except Exception as err:
raise SystemExit(f"Can't remove directory: {err}")
def _rm(path: str) -> None:
if exists(path):
_log(f"RM --- {path}")
try:
os.remove(path)
except Exception as err:
raise SystemExit(f"Can't remove file: {err}")
def _move(src: str, dest: str) -> None:
_log(f"MOVE --- {src} --> {dest}")
try:
os.rename(src, dest)
except Exception as err:
raise SystemExit(f"Can't move file: {err}")
def _chown(path: str, user: str) -> None:
if pwd.getpwuid(os.stat(path).st_uid).pw_name != user:
_log(f"CHOWN --- {user} - {path}")
try:
shutil.chown(path, user=user)
except Exception as err:
raise SystemExit(f"Can't change ownership: {err}")
def _chgrp(path: str, group: str) -> None:
if grp.getgrgid(os.stat(path).st_gid).gr_name != group:
_log(f"CHGRP --- {group} - {path}")
try:
shutil.chown(path, group=group)
except Exception as err:
raise SystemExit(f"Can't change group: {err}")
def _chmod(path: str, mode: int) -> None:
if stat.S_IMODE(os.stat(path).st_mode) != mode:
_log(f"CHMOD --- 0o{mode:o} - {path}")
try:
os.chmod(path, mode)
except Exception as err:
raise SystemExit(f"Can't change permissions: {err}")
# =====
def _fix_msd(part: Partition) -> None:
# First images migration
images_path = join(part.root_path, "images")
meta_path = join(part.root_path, "meta")
if exists(images_path) and exists(meta_path):
for name in os.listdir(images_path):
_move(join(images_path, name), os.path.join(part.root_path, name))
if not exists(join(meta_path, f"{name}.complete")):
open(os.path.join(part.root_path, f".__{name}.incomplete")).close() # pylint: disable=consider-using-with
_rmtree(images_path)
_rmtree(meta_path)
# Second images migration
for name in os.listdir(part.root_path):
if name.startswith(".__") and name.endswith(".complete"):
_rm(join(part.root_path, name))
if part.user:
_chown(part.root_path, part.user)
if part.group:
_chgrp(part.root_path, part.group)
def _fix_pst(part: Partition) -> None:
path = os.path.join(part.root_path, "data")
_mkdir(path)
if part.user:
_chown(part.root_path, part.user)
_chown(path, part.user)
if part.group:
_chgrp(part.root_path, part.group)
_chgrp(path, part.group)
if part.user and part.group:
_chmod(part.root_path, 0o1775)
# =====
def main() -> None:
if len(sys.argv) != 2 or sys.argv[1] not in ["ro", "rw"]:
raise SystemExit(f"Usage: {sys.argv[0]} [ro|rw]")
finder = None
fix = None
app = os.path.basename(sys.argv[0])
if app == "kvmd-helper-otgmsd-remount":
finder = find_msd
fix = _fix_msd
elif app == "kvmd-helper-pst-remount":
finder = find_pst
fix = _fix_pst
else:
raise SystemExit("Unknown application target")
rw = (sys.argv[1] == "rw")
assert finder is not None
part = finder()
_remount(part.mount_path, rw)
if rw and part.root_path:
fix(part)
_log(f"Storage in the {'RW' if rw else 'RO'}-mode now")
|
