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Attached is a patch against udev-008 to send out a D-BUS message when a
device node is added or removed.
Using D-BUS lingo, udev acquires the org.kernel.udev service and sends
out a NodeCreated or NodeDeleted signal on the
org.kernel.udev.NodeMonitor interface. Each signal carries two
parameters: the node in question and the corresponding sysfs path.
[Note: the D-BUS concepts of service, interface, object can be a bit
confusing at first glance]
An example program listening for these messages looks like this
#!/usr/bin/python
import dbus
import gtk
def udev_signal_received(dbus_iface, member, service, object_path, message):
[filename, sysfs_path] = message.get_args_list()
if member=='NodeCreated':
print 'Node %s created for %s'%(filename, sysfs_path)
elif member=='NodeDeleted':
print 'Node %s deleted for %s'%(filename, sysfs_path)
def main():
bus = dbus.Bus(dbus.Bus.TYPE_SYSTEM)
bus.add_signal_receiver(udev_signal_received,
'org.kernel.udev.NodeMonitor', # interface
'org.kernel.udev', # service
'/org/kernel/udev/NodeMonitor') # object
gtk.mainloop()
if __name__ == '__main__':
main()
and this is the output when hot-plugging some usb-storage.
[david@laptop udev-008]$ ~/node_monitor.py
Node /udev/sda created for /block/sda
Node /udev/sda1 created for /block/sda/sda1
Node /udev/sda1 deleted for /block/sda/sda1
Node /udev/sda deleted for /block/sda
The patch requires D-BUS 0.20 or later while the python example program
requires D-BUS from CVS as I only recently applied a patch against the
python bindings.
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Here is an improved version of the patch that enables builds of the extras
progams for the targets all, clean, install, and uninstall, and passes
down the "prefix" for use by install and uninstall.
This patch enables building of the "extras" programs using the same build
environment as udev (i.e. build with udev's versions of klibc and
sysfsutils).
For example, build scsi_id and udev via:
make EXTRAS=extras/scsi_id
Build scsi_id and udev with klibc via:
make KLIBC=true EXTRAS=extras/scsi_id
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Now there are only 3 valid environment test variables. The rest can be
specified with the config file.
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the older udev.config file is now called udev.rules.
This allows us to better control configuration values, and move away from
the environment variables.
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it's a bit noisy for the masses...
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This patch adds -nodefaultlibs to LDFLAGS when compiling udev against
klibc. This fixes the warning that I was getting when using $(LD)=gcc
in the versions after Makefile.klibc disappeared. The problem was that
it was still including a "-lc" in the call to the linker.
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I'm not sure why ppc is converted to powerpc, it breaks at least $(ARCH)
in klibc.
gcc -dumpmachine
powerpc-suse-linux
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I can't build udev with make -j9. Here's a patch to fix it.
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On Wed, Nov 19, Greg KH wrote:
> > I did 'make KLIBC=true' in the current bk tree.
>
> try 'make -f Makefile.klibc' in the current tree. For some reason I
> couldn't figure out how to have Makefile work for both KLIBC=true and
> KLIBC=false. But I didn't try too hard :)
I dont understand that.
please do rm -f Makefile.klibc; apply this patch and tell me what fails.
works for me.
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This fixes problem of libsysfs and tdb getting build with different gcc options
as the rest of udev.
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and udev.config
the namedev name didn't really make much sense anymore...
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the bk tree.
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hand anymore.
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Can be overridden on the makefile line.
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I noticed that libsysfs doesn't inherently grab cross compilation arguments
that are set in the top-level Makefile, so I've come up with the following
patch to fix this. With the patch, I can succesfully cross compile for other
architectures (such as sh) by doing 'make ARCH=sh CROSS=sh-linux-' in the
top-level directory.
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.permission parsing works, .config needs more work.
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