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Diffstat (limited to 'udevd.8')
| -rw-r--r-- | udevd.8 | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/udevd.8 b/udevd.8 new file mode 100644 index 0000000000..9d0127b6bc --- /dev/null +++ b/udevd.8 @@ -0,0 +1,56 @@ +.TH UDEVD 8 "February 2004" "" "Linux Administrator's Manual" +.SH NAME +udevd \- udev event serializer daemon +.br +udevsend \- sends the event to udevd +.SH SYNOPSIS +.BI udevsend " hotplug-subsystem" +.sp +The environment must provide the following variables: +.TP +.B ACTION +.IR add " or " remove +signifies the connection or disconnection of a device. +.TP +.B DEVPATH +The sysfs devpath of the device without the mountpoint but a leading slash. +.TP +.B SEQNUM +The sequence number of the event provided by the kernel. +If unset, the event bypasses the queue and will be executed immediately. +.SH "DESCRIPTION" +.B udevd +allows the serialization of +.BR hotplug (8) +events. The events generated by the kernel may arrive in random order +in userspace, that makes it neccessary to reorder them. +.br +.B udevd +takes care of the kernel supplied sequence number and arranges the events for +execution in the correct order. Missing sequences delay the execution of the +following events until a timeout of a maximum of 5 seconds is reached. +.br +For each event a +.BR udev (8) +instance is executed in the background. All further events for the same device +are delayed until the execution is finished. This way there will never be more +than one instance running for a single device at the same time. +.br +.B udevd +receives the events from +.B udevsend +which is called by +.BR hotplug (8). +If +.B udevd +isn't already running, +.B udevsend +will start it. +.SH "SEE ALSO" +.BR udev (8), +.BR udevinfo (8), +.BR hotplug (8) +.SH AUTHORS +.B udevd +was developed primarily by Kay Sievers <kay.sievers@vrfy.org>, with much help +from others. |