X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udevd.8;h=b06a2b7af12578071898ac059114cea4e8273fd2;hp=30adb94f2b358fee397cd428baab9c7b34274437;hb=e296b1476e99150413d92c58e3b5e07e5bda9fd4;hpb=bef370d6ebd6707cc2ef183c2dc83f4a62d8111b diff --git a/udevd.8 b/udevd.8 index 30adb94f2..b06a2b7af 100644 --- a/udevd.8 +++ b/udevd.8 @@ -1,47 +1,33 @@ .TH UDEVD 8 "February 2004" "" "Linux Administrator's Manual" .SH NAME -udevd \- udev event serializer daemon -.br -udevsend \- sends the event to udevd +udevd, udevdsend \- udev event serializer daemon and udev event sender .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 it. +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 are delaying the -execution of the following events until a timeout of a maximum of 5 seconds -is reached. +takes care of the kernel supplied +.B SEQNUM +sequence number and arranges the events for execution in the correct order. +Missing sequences delay the execution of the following events until a timeout +is reached. Events without any sequence number are bypassing the queue and +will be executed immediately. .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 it will never run more -than one instance for a single device at the same time. +instance is executed in the background with the complete environment received +by the hotplug event. 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,