2005-04-27 05:59:47 +02:00
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/*
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* udev.c
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*
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* Userspace devfs
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*
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2004-01-27 04:23:11 +01:00
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* Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
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2005-04-27 05:59:47 +02:00
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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2003-04-10 19:53:46 +02:00
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#include <stdio.h>
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#include <errno.h>
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2003-12-03 10:08:46 +01:00
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#include <ctype.h>
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2003-12-30 10:21:06 +01:00
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#include <signal.h>
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2003-04-10 19:53:46 +02:00
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2005-04-27 05:59:47 +02:00
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#include "udev.h"
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#include "udev_version.h"
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2003-12-08 18:40:40 +01:00
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#include "udev_dbus.h"
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[PATCH] add udev logging to info log
On Thu, Jan 15, 2004 at 05:14:16AM +0100, Kay Sievers wrote:
> On Wed, Jan 14, 2004 at 01:10:43PM -0800, Greg KH wrote:
> > On Wed, Jan 14, 2004 at 02:34:26PM -0600, Clay Haapala wrote:
> > > On Wed, 14 Jan 2004, Chris Friesen spake thusly:
> > > >
> > > > Maybe for ones with a matching rule, you could print something like:
> > > >
> > > >
> > > Is the act of printing/syslogging a rule in an of itself?
> >
> > No, as currently the only way stuff ends up in the syslog is if
> > DEBUG=true is used on the build line.
> >
> > But it's sounding like we might want to change that... :)
>
> How about this in the syslog after connect/disconnect?
>
> Jan 15 05:07:45 pim udev[28007]: configured rule in '/etc/udev/udev.rules' at line 17 applied, 'video*' becomes 'video/webcam%n'
> Jan 15 05:07:45 pim udev[28007]: creating device node '/udev/video/webcam0'
> Jan 15 05:07:47 pim udev[28015]: removing device node '/udev/video/webcam0'
Here is a slightly better version. I've created a logging.h file and
moved the debug macros from udev.h in there.
If you type:
'make' - you will get a binary that prints one or two lines to syslog
if a device node is created or deleted
'make LOG=false' - you get a binary that prints asolutely nothing
'make DEBUG=true' - the same as today, it will print all debug lines
2004-01-16 06:53:20 +01:00
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#include "logging.h"
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2003-07-17 10:24:51 +02:00
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#include "namedev.h"
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2003-10-15 08:20:53 +02:00
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#include "udevdb.h"
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2003-07-19 14:06:55 +02:00
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#include "libsysfs/libsysfs.h"
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2005-04-27 05:59:47 +02:00
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2003-10-22 05:19:09 +02:00
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/* global variables */
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char **main_argv;
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char **main_envp;
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2004-02-02 17:19:41 +01:00
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unsigned char logname[42];
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2003-10-22 05:19:09 +02:00
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2003-12-30 10:21:06 +01:00
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static void sig_handler(int signum)
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{
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dbg("caught signal %d", signum);
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switch (signum) {
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case SIGINT:
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case SIGTERM:
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sysbus_disconnect();
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udevdb_exit();
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exit(20 + signum);
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break;
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default:
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dbg("unhandled signal");
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}
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}
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2003-10-22 05:19:09 +02:00
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static inline char *get_action(void)
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2005-04-27 05:59:47 +02:00
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{
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char *action;
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action = getenv("ACTION");
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return action;
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}
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2003-10-22 05:19:09 +02:00
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static inline char *get_devpath(void)
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{
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char *devpath;
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devpath = getenv("DEVPATH");
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return devpath;
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}
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2005-04-27 05:59:47 +02:00
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2003-10-22 05:19:09 +02:00
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static inline char *get_seqnum(void)
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2005-04-27 05:59:47 +02:00
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{
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2003-10-22 05:19:09 +02:00
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char *seqnum;
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2005-04-27 05:59:47 +02:00
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2003-10-22 05:19:09 +02:00
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seqnum = getenv("SEQNUM");
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return seqnum;
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2005-04-27 05:59:47 +02:00
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}
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2004-01-04 17:08:26 +01:00
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static char *subsystem_blacklist[] = {
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"net",
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"scsi_host",
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"scsi_device",
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2004-01-15 07:55:24 +01:00
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"usb_host",
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"pci_bus",
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2004-01-04 17:08:26 +01:00
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"",
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};
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2004-01-27 04:23:11 +01:00
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static int udev_hotplug(int argc, char **argv)
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2003-12-31 07:31:37 +01:00
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{
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char *action;
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char *devpath;
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char *subsystem;
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int retval = -EINVAL;
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2004-01-04 17:08:26 +01:00
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int i;
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2003-12-31 07:31:37 +01:00
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2004-01-27 04:23:11 +01:00
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action = get_action();
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if (!action) {
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dbg ("no action?");
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goto exit;
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}
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2003-07-21 05:48:48 +02:00
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2003-10-22 05:19:09 +02:00
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devpath = get_devpath();
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if (!devpath) {
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dbg ("no devpath?");
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2003-07-19 14:06:55 +02:00
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goto exit;
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}
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2003-11-25 07:27:17 +01:00
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dbg("looking at '%s'", devpath);
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2003-07-17 10:24:51 +02:00
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2003-07-19 14:06:55 +02:00
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/* we only care about class devices and block stuff */
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2003-10-22 05:19:09 +02:00
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if (!strstr(devpath, "class") &&
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!strstr(devpath, "block")) {
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2003-11-25 07:27:17 +01:00
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dbg("not a block or class device");
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2003-07-19 14:06:55 +02:00
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goto exit;
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}
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2003-07-17 05:18:06 +02:00
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2004-01-04 17:08:26 +01:00
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/* skip blacklisted subsystems */
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2004-01-27 04:23:11 +01:00
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subsystem = argv[1];
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2004-01-04 17:08:26 +01:00
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i = 0;
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while (subsystem_blacklist[i][0] != '\0') {
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if (strcmp(subsystem, subsystem_blacklist[i]) == 0) {
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dbg("don't care about '%s' devices", subsystem);
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goto exit;
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}
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i++;
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2003-07-21 05:48:48 +02:00
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}
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2005-04-27 05:59:47 +02:00
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2003-12-08 18:40:40 +01:00
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/* connect to the system message bus */
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sysbus_connect();
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[PATCH] D-BUS patch for udev-008
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.
2003-12-08 18:19:19 +01:00
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2004-01-27 04:23:11 +01:00
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/* initialize our configuration */
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udev_init_config();
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2003-10-15 08:20:53 +02:00
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/* initialize udev database */
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retval = udevdb_init(UDEVDB_DEFAULT);
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if (retval != 0) {
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2003-11-25 07:27:17 +01:00
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dbg("unable to initialize database");
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2003-12-25 07:58:16 +01:00
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goto exit_sysbus;
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2003-10-15 08:20:53 +02:00
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}
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2003-12-30 10:29:16 +01:00
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/* set up a default signal handler for now */
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signal(SIGINT, sig_handler);
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signal(SIGTERM, sig_handler);
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2003-07-21 05:48:48 +02:00
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/* initialize the naming deamon */
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namedev_init();
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2003-04-10 20:02:32 +02:00
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if (strcmp(action, "add") == 0)
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2003-10-22 05:19:09 +02:00
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retval = udev_add_device(devpath, subsystem);
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2003-04-10 19:53:46 +02:00
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2003-10-15 08:20:53 +02:00
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else if (strcmp(action, "remove") == 0)
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2003-10-22 05:19:09 +02:00
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retval = udev_remove_device(devpath, subsystem);
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2003-04-10 19:53:46 +02:00
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2003-10-15 08:20:53 +02:00
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else {
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2003-11-25 07:27:17 +01:00
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dbg("unknown action '%s'", action);
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2003-10-15 08:20:53 +02:00
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retval = -EINVAL;
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}
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udevdb_exit();
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2003-04-10 19:53:46 +02:00
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2003-12-25 07:58:16 +01:00
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exit_sysbus:
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2003-12-08 18:40:40 +01:00
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/* disconnect from the system message bus */
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sysbus_disconnect();
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[PATCH] D-BUS patch for udev-008
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.
2003-12-08 18:19:19 +01:00
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2003-12-08 18:40:40 +01:00
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exit:
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2004-01-10 09:55:28 +01:00
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if (retval > 0)
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retval = 0;
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2004-01-10 09:54:33 +01:00
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return -retval;
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2005-04-27 05:59:47 +02:00
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}
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2003-12-31 07:31:37 +01:00
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int main(int argc, char **argv, char **envp)
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{
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main_argv = argv;
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main_envp = envp;
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2004-02-02 17:19:41 +01:00
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init_logging("udev");
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2003-12-31 07:31:37 +01:00
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dbg("version %s", UDEV_VERSION);
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2004-01-27 04:23:11 +01:00
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return udev_hotplug(argc, argv);
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2003-12-31 07:31:37 +01:00
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}
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