Issue 272 in pyftpdlib: pyftpdlib-1.2.0 doesn't work on OpenBSD

[pyft...@googlecode.com]

Status: New
Owner: ----
Labels: Type-Defect Priority-High Component-Library OpSys-OpenBSD

New issue 272 by juanfra...@gmail.com: pyftpdlib-1.2.0 doesn't work on
OpenBSD
http://code.google.com/p/pyftpdlib/issues/detail?id=272

OS: OpenBSD
Python: 2.7.5 and 3.3
pyftplib: 1.2.0

pyftplib uses the multiprocessing module of python. Some parts of this
module don't work on OpenBSD due to the lack of some semaphore
functionality.


$ python2.7 -m pyftpdlib
Traceback (most recent call last):
File "/usr/local/lib/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/local/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/usr/local/lib/python2.7/site-packages/pyftpdlib/__main__.py", line
45, in <module>
from pyftpdlib.servers import FTPServer
File "/usr/local/lib/python2.7/site-packages/pyftpdlib/servers.py", line
521, in <module>
class MultiprocessFTPServer(_SpawnerBase):
File "/usr/local/lib/python2.7/site-packages/pyftpdlib/servers.py", line
525, in MultiprocessFTPServer
_lock = multiprocessing.Lock()
File "/usr/local/lib/python2.7/multiprocessing/__init__.py", line 175, in
Lock
from multiprocessing.synchronize import Lock
File "/usr/local/lib/python2.7/multiprocessing/synchronize.py", line 59,
in <module>
" function, see issue 3770.")
ImportError: This platform lacks a functioning sem_open implementation,
therefore, the required synchroniz
ation primitives needed will not function, see issue 3770.


pyftplib 0.7 works OK. Can you modify pyftplib to work around of the
OpenBSD problem?.

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[pyft...@googlecode.com]

Comment #1 on issue 272 by g.rodola: pyftpdlib-1.2.0 doesn't work on OpenBSD
http://code.google.com/p/pyftpdlib/issues/detail?id=272

Can you try this and tell me if it works?

Index: servers.py
===================================================================
--- servers.py (revision 1233)
+++ servers.py (working copy)
@@ -518,6 +518,10 @@
if os.name == 'posix':
try:
import multiprocessing
+ # Work around
https://code.google.com/p/pyftpdlib/issues/detail?id=272
+ # on OpenBSD.
+ multiprocessing.Lock()
+ multiprocessing.Event()
except ImportError:
pass
else:

[pyft...@googlecode.com]

Comment #2 on issue 272 by juanfra...@gmail.com: pyftpdlib-1.2.0 doesn't

work on OpenBSD
http://code.google.com/p/pyftpdlib/issues/detail?id=272

Your patch fixes the problem. Thanks a lot!

[pyft...@googlecode.com]

Updates:
Status: FixedInSVN
Labels: -OpSys-OpenBSD OpSys-BSD Milestone-1.3.0

Comment #3 on issue 272 by g.rodola: pyftpdlib-1.2.0 doesn't work on OpenBSD
http://code.google.com/p/pyftpdlib/issues/detail?id=272

(No comment was entered for this change.)

[pyft...@googlecode.com]

Comment #5 on issue 272 by juanfra...@gmail.com: pyftpdlib-1.2.0 doesn't

work on OpenBSD
http://code.google.com/p/pyftpdlib/issues/detail?id=272

Just for future reference, OpenBSD has now support for semaphores. The
patch is only needed for version 5.4 and earlier.