migrating from xpyb #111
Comments
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On Mon, Sep 14, 2020 at 11:06:19AM -0700, Ted X Toth wrote:
I've got some old code that used xpyb to get and set the SELinux context of some X resources that I'm looking to port to python3. I've started to looking at using xcffib. But just playing around in the interpreter I got an exception when I tried to get a windows context:
>>> import xcffib
>>> import xcffib.xselinux
>>> c = xcffib.connect()
>>> c2 = xcffib.wrap(xcffib.ffi.cast("long", c._conn))
>>> xselinux = c2(xcffib.xselinux.key)
>>> xselinux.GetWindowContext(0x400139)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.6/site-packages/xcffib-0.10.1-py3.6.egg/xcffib/xselinux.py", line 246, in GetWindowContext
return self.send_request(7, buf, GetWindowContextCookie, is_checked=is_checked)
File "/usr/local/lib/python3.6/site-packages/xcffib-0.10.1-py3.6.egg/xcffib/__init__.py", line 391, in send_request
seq = self.conn.send_request(flags, xcb_parts + 2, xcb_req)
File "/usr/local/lib/python3.6/site-packages/xcffib-0.10.1-py3.6.egg/xcffib/__init__.py", line 573, in wrapper
self.invalid()
File "/usr/local/lib/python3.6/site-packages/xcffib-0.10.1-py3.6.egg/xcffib/__init__.py", line 559, in invalid
raise ConnectionException(err)
xcffib.ConnectionException: xcb connection shutdown because extension not supported
I'm running on a centos7 box with:
libxcb-1.13-1.el7.x86_64
libxcb-devel-1.13-1.el7.x86_64
xcb-proto-1.13-4.el7.noarch
installed.
Any pointers as to what I'm doing wrong would be appreciated.
Do you have the selinux extensions enabled? (i.e. what is the output
of `xffib.xproto.xprotoExtension(c).ListExtensions().reply().names`?
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for ext in xcffib.xproto.xprotoExtension(c).ListExtensions().reply().names: output: so apparently the selinux extension isn't enabled. I don't recall doing anything in the old code to enable it and I see the extension shared library in the rpm: Is there something I need to do to enable it? |
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Oops the xserver I'm querying is on my Mac not the centos box I ssh'd into :( |
I've got some old code that used xpyb to get and set the SELinux context of some X resources that I'm looking to port to python3. I've started to looking at using xcffib. But just playing around in the interpreter I got an exception when I tried to get a windows context:
I'm running on a centos7 box with:
libxcb-1.13-1.el7.x86_64
libxcb-devel-1.13-1.el7.x86_64
xcb-proto-1.13-4.el7.noarch
installed.
Any pointers as to what I'm doing wrong would be appreciated.
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