projects / thirdparty / systemd.git / blame
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| 7dae391f KS |
1 | .TH UDEVD 8 "February 2004" "" "Linux Administrator's Manual" |
| 2 | .SH NAME | |
| 9d009843 | 3 | udevd, udevdsend \- udev event serializer daemon and udev event sender |
| bef370d6 | 4 | .SH SYNOPSIS |
| 6b493a20 | 5 | .BI udevsend |
| 7dae391f KS |
6 | .SH "DESCRIPTION" |
| 7 | .B udevd | |
| 8 | allows the serialization of | |
| 9 | .BR hotplug (8) | |
| 10 | events. The events generated by the kernel may arrive in random order | |
| b86f56ff | 11 | in userspace, that makes it neccessary to reorder them. |
| 7dae391f KS |
12 | .br |
| 13 | .B udevd | |
| a0294b76 KS |
14 | takes care of the kernel supplied |
| 15 | .B SEQNUM | |
| 16 | sequence number and arranges the events for execution in the correct order. | |
| 17 | Missing sequences delay the execution of the following events until a timeout | |
| 18 | is reached. Events without any sequence number are bypassing the queue and | |
| 19 | will be executed immediately. | |
| 7dae391f KS |
20 | .br |
| 21 | For each event a | |
| 22 | .BR udev (8) | |
| a0294b76 KS |
23 | instance is executed in the background with the complete environment received |
| 24 | by the hotplug event. All further events for the same device are delayed until | |
| 25 | the execution is finished. This way there will never be more than one instance | |
| 26 | running for a single device at the same time. | |
| 7dae391f KS |
27 | .br |
| 28 | .B udevd | |
| 29 | receives the events from | |
| 30 | .B udevsend | |
| ad63031e KS |
31 | If |
| 32 | .B udevd | |
| 33 | isn't already running, | |
| 34 | .B udevsend | |
| 35 | will start it. | |
| 7dae391f | 36 | .SH "SEE ALSO" |
| bef370d6 KS |
37 | .BR udev (8), |
| 38 | .BR udevinfo (8), | |
| 39 | .BR hotplug (8) | |
| 7dae391f KS |
40 | .SH AUTHORS |
| 41 | .B udevd | |
| 42 | was developed primarily by Kay Sievers <kay.sievers@vrfy.org>, with much help | |
| 43 | from others. |