[MacOS] psutil.net_connections() Operation not supported on socket

[rtkaratekid]

Platform

• MacOS X - Mojave
• psutil version - 5.6.1

Bug description
Running psutil.net_connections() a few thousand times while monitoring the machine leads to this error message. It looks like there is an issue in the _psosx.py file that is trying to run cext.proc_connections() on a socket

traceback message (

  File "macos_agent.py", line 86, in ip_receive
    connections = psutil.net_connections()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/psutil/__init__.py", line 2248, in net_connections
    return _psplatform.net_connections(kind)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/psutil/_psosx.py", line 252, in net_connections
    cons = Process(pid).connections(kind)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/psutil/_psosx.py", line 339, in wrapper
    return fun(self, *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/psutil/_psosx.py", line 528, in connections
    rawlist = cext.proc_connections(self.pid, families, types)
OSError: [Errno 102] Operation not supported on socket

)

connections = psutil.net_connections()

Test results

# No failures

[giampaolo]

Hard to tell where this comes from as the C function implementing it is quite big. My best guess is that it originates either from here:

psutil/psutil/_psutil_osx.c

Lines 1106 to 1108 in b31f3bf

	pidinfo_result = psutil_proc_pidinfo(pid, PROC_PIDLISTFDS, 0, NULL, 0);
	if (pidinfo_result <= 0)
	goto error;

...or here:

psutil/psutil/_psutil_osx.c

Lines 1116 to 1119 in b31f3bf

	pidinfo_result = psutil_proc_pidinfo(
	pid, PROC_PIDLISTFDS, 0, fds_pointer, pidinfo_result);
	if (pidinfo_result <= 0)
	goto error;

You should git clone psutil repo, add a printf() statement, recompile (make install) and try it yourself though 'cause I can't reproduce it.

[electrozen]

I confirm the behavior still exists with ps_util 5.7.0 and macOS 10.15.3 when looping a thousand times over this:
for proc in psutil.process_iter(): info = proc.as_dict(attrs=['pid', 'name', 'username', 'connections'])

Operation not supported on socket