HGKeeper

Fix crash in runtime if PSK secret is missing

2019-03-13, Andrey Skvortsov

a3ec35ee94e7

Fix crash in runtime if PSK secret is missing

./Beremiz_service.py -s $PWD/psk2.txt -n beremiz /tmp/beremiz
Beremiz_service: 1.2-1378c18402c3+

Traceback (most recent call last):
File "./Beremiz_service.py", line 511, in
ensurePSK(servicename, PSKpath)
File "/home/developer/WorkData/PLC/beremiz/beremiz/runtime/Stunnel.py", line 32, in ensurePSK
PSKgen(ID, PSKpath)
File "/home/developer/WorkData/PLC/beremiz/beremiz/runtime/Stunnel.py", line 23, in PSKgen
call(restart_stunnel_cmdline)
File "/home/developer/WorkData/PLC/beremiz/beremiz/runtime/spawn_subprocess.py", line 116, in call
pid = posix_spawn.posix_spawnp(cmd[0], cmd)
File "/home/developer/.local/lib/python2.7/site-packages/posix_spawn/_impl.py", line 120, in posix_spawnp
return _posix_spawn(lib.posix_spawnp, *args, **kwargs)
File "/home/developer/.local/lib/python2.7/site-packages/posix_spawn/_impl.py", line 111, in _posix_spawn
_check_error(res, path)
File "/home/developer/.local/lib/python2.7/site-packages/posix_spawn/_impl.py", line 10, in _check_error
raise OSError(errno, os.strerror(errno), path)
OSError: [Errno 2] No such file or directory: '/etc/init.d/S50stunnel'

#!/usr/bin/env python

# -*- coding: utf-8 -*-

# See COPYING.Runtime file for copyrights details.

from __future__ import absolute_import

from ctypes import CDLL, RTLD_GLOBAL, pointer, c_int, POINTER, c_char, create_string_buffer

def TryPreloadXenomai():

"""

Xenomai 3 (at least for version <= 3.0.6) do not handle properly dlclose

of shared objects whose dlopen did trigger xenomai_init.

As a workaround, this pre-loads xenomai libraries that need to be

initialized and call xenomai_init once for all.

Xenomai auto init of libs MUST be disabled (see --auto-init-solib in xeno-config)

"""

try:

for name in ["cobalt", "modechk", "copperplate", "alchemy"]:

globals()[name] = CDLL("lib"+name+".so", mode=RTLD_GLOBAL)

cobalt.xenomai_init(pointer(c_int(0)), pointer((POINTER(c_char)*2)(create_string_buffer("prog_name"), None)))

except Exception:

pass