upstart-udev-bridge(8) System Manager's Manual upstart-udev-bridge(8)NAME
upstart-udev-bridge - Bridge between Upstart and udev
SYNOPSIS
upstart-udev-bridge [OPTIONS]...
DESCRIPTION
upstart-udev-bridge receives information about kernel uevents that udev(8) has completed and creates init(8) events for them.
It emits events which match the pattern "S-device-A" where 'S' is the udev subsystem and 'A' is one of added, changed or removed, which
correspond to the past tense of the udev 'action'.
See udev(7) and for further details.
Assuming /sys is mounted, possible values for subsystem for your system are viewable via /sys/class/.
OPTIONS --daemon
Detach and run in the background.
--debug
Enable debugging output.
--help Show brief usage summary.
--no-strip
Do not modify udev message contents. By default, all udev data will have non-printable bytes removed. This option reverts the behav-
iour to not modifying the data in any way. This option is not recommended since specifying it could result in udev(7) events not
being emitted as Upstart events should any of your hardware expose non-printable characters to the kernel. You can establish whether
this is happening by running without specifying this option but with the --debug option.
--verbose
Enable verbose output.
EXAMPLES
Some examples of Upstart events generated by this bridge:
net-device-added
Event emitted when a network device is added.
net-device-removed
Event emitted when a network device is removed.
graphics-card-added
Event emitted when a graphics device is available to the system.
NOTES
This is a temporary tool until init(8) itself gains the functionality to read them directly; you should not rely on its behaviour.
AUTHOR
Written by Scott James Remnant <scott@netsplit.com>
BUGS
Report bugs at <https://launchpad.net/ubuntu/+source/upstart/+bugs>
COPYRIGHT
Copyright (C) 2009,2010,2011 Canonical Ltd.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO init(5)init(8)udev(7)upstart 2011-03-08 upstart-udev-bridge(8)
Check Out this Related Man Page
SYSTEMD-UDEVD.SERVICE(8) systemd-udevd.service SYSTEMD-UDEVD.SERVICE(8)NAME
systemd-udevd.service, systemd-udevd-control.socket, systemd-udevd-kernel.socket, systemd-udevd - Device event managing daemon
SYNOPSIS
systemd-udevd.service
systemd-udevd-control.socket
systemd-udevd-kernel.socket
/lib/systemd/systemd-udevd [--daemon] [--debug] [--children-max=] [--exec-delay=] [--event-timeout=] [--resolve-names=early|late|never]
[--version] [--help]
DESCRIPTION
systemd-udevd listens to kernel uevents. For every event, systemd-udevd executes matching instructions specified in udev rules. See
udev(7).
The behavior of the daemon can be configured using udev.conf(5), its command line options, environment variables, and on the kernel command
line, or changed dynamically with udevadm control.
OPTIONS -d, --daemon
Detach and run in the background.
-D, --debug
Print debug messages to standard error.
-c=, --children-max=
Limit the number of events executed in parallel.
-e=, --exec-delay=
Delay the execution of RUN instructions by the given number of seconds. This option might be useful when debugging system crashes
during coldplug caused by loading non-working kernel modules.
-t=, --event-timeout=
Set the number of seconds to wait for events to finish. After this time, the event will be terminated. The default is 180 seconds.
-N=, --resolve-names=
Specify when systemd-udevd should resolve names of users and groups. When set to early (the default), names will be resolved when the
rules are parsed. When set to late, names will be resolved for every event. When set to never, names will never be resolved and all
devices will be owned by root.
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
KERNEL COMMAND LINE
Parameters starting with "rd." will be read when systemd-udevd is used in an initrd.
udev.log_priority=, rd.udev.log_priority=
Set the log level.
udev.children_max=, rd.udev.children_max=
Limit the number of events executed in parallel.
udev.exec_delay=, rd.udev.exec_delay=
Delay the execution of RUN instructions by the given number of seconds. This option might be useful when debugging system crashes
during coldplug caused by loading non-working kernel modules.
udev.event_timeout=, rd.udev.event_timeout=
Wait for events to finish up to the given number of seconds. This option might be useful if events are terminated due to kernel drivers
taking too long to initialize.
net.ifnames=
Network interfaces are renamed to give them predictable names when possible. It is enabled by default; specifying 0 disables it.
SEE ALSO udev.conf(5), udev(7), udevadm(8)systemd 237SYSTEMD-UDEVD.SERVICE(8)