While lurking on the Kino developers mailing list, they seem to be the most active users of hardware
knobs, I can across the EVIOCGRAB ioctl which will exclusively grab an input device. This can be
used to temporarily prevent X (under in Linux 2.6 at least) from receiving any messages from a
specific device.
Attached is a patch for "powermate.py". I don't know how it will work on other systems, but it works
great for me.
Enjoy,
Krys
--
Krzysztof Kamieniecki
callsign:KB1KLB
mailto:[EMAIL PROTECTED]
Index: src/python/powermate.py
===================================================================
RCS file: /cvsroot/gnuradio/gr-wxgui/src/python/powermate.py,v
retrieving revision 1.5
diff -u -r1.5 powermate.py
--- src/python/powermate.py 9 Jun 2005 21:25:36 -0000 1.5
+++ src/python/powermate.py 28 Jul 2005 03:28:32 -0000
@@ -207,6 +207,11 @@
os.close(self.handle)
self.handle = -1
return False
+
+ # get exclusive control of the device, using ioctl EVIOCGRAB
+ # there may be an issue with this on non x86 platforms and if
+ # the _IOW,_IOC,... macros in <asm/ioctl.h> are changed
+ fcntl.ioctl(self.handle,gru.hexint(0x40044590), 1)
return True
except exceptions.OSError:
return False
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