| '\" t |
| .\" Title: udevd |
| .\" Author: [see the "Author" section] |
| .\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/> |
| .\" Date: 02/10/2011 |
| .\" Manual: udevd |
| .\" Source: udev |
| .\" Language: English |
| .\" |
| .TH "UDEVD" "8" "02/10/2011" "udev" "udevd" |
| .\" ----------------------------------------------------------------- |
| .\" * set default formatting |
| .\" ----------------------------------------------------------------- |
| .\" disable hyphenation |
| .nh |
| .\" disable justification (adjust text to left margin only) |
| .ad l |
| .\" ----------------------------------------------------------------- |
| .\" * MAIN CONTENT STARTS HERE * |
| .\" ----------------------------------------------------------------- |
| .SH "NAME" |
| udevd \- event managing daemon |
| .SH "SYNOPSIS" |
| .HP \w'\fBudevd\fR\ 'u |
| \fBudevd\fR [\fB\-\-daemon\fR] [\fB\-\-debug\fR] [\fB\-\-children\-max=\fR] [\fB\-\-exec\-delay=\fR] [\fB\-\-resolve\-names=early|late|never\fR] [\fB\-\-version\fR] [\fB\-\-help\fR] |
| .SH "DESCRIPTION" |
| .PP |
| udevd listens to kernel uevents\&. For every event, udevd executes matching instructions specified in udev rules\&. See |
| \fBudev\fR(7)\&. |
| .PP |
| On startup the content of the directory |
| /lib/udev/devices |
| is copied to |
| /dev\&. If kernel modules specify static device nodes, these nodes are created even without a corresponding kernel device, to allow on\-demand loading of kernel modules\&. Matching permissions specified in udev rules are applied to these static device nodes\&. |
| .PP |
| The behavior of the running daemon can be changed with |
| \fBudevadm control\fR\&. |
| .SH "OPTIONS" |
| .PP |
| \fB\-\-daemon\fR |
| .RS 4 |
| Detach and run in the background\&. |
| .RE |
| .PP |
| \fB\-\-debug\fR |
| .RS 4 |
| Print debug messages to stderr\&. |
| .RE |
| .PP |
| \fB\-\-children\-max=\fR |
| .RS 4 |
| Limit the number of parallel executed events\&. |
| .RE |
| .PP |
| \fB\-\-exec\-delay=\fR |
| .RS 4 |
| Number of seconds to delay the execution of RUN instructions\&. This might be useful when debugging system crashes during coldplug cause by loading non\-working kernel modules\&. |
| .RE |
| .PP |
| \fB\-\-resolve\-names=\fR |
| .RS 4 |
| Specify when udevd should resolve names of users and groups\&. When set to |
| \fBearly\fR |
| (the default) names will be resolved when the rules are parsed\&. When set to |
| \fBlate\fR |
| names will be resolved for every event\&. When set to |
| \fBnever\fR |
| names will never be resolved and all devices will be owned by root\&. |
| .RE |
| .PP |
| \fB\-\-version\fR |
| .RS 4 |
| Print version number\&. |
| .RE |
| .PP |
| \fB\-\-help\fR |
| .RS 4 |
| Print help text\&. |
| .RE |
| .SH "ENVIRONMENT" |
| .PP |
| \fIUDEV_LOG=\fR |
| .RS 4 |
| Set the logging priority\&. |
| .RE |
| .SH "KERNEL COMMAND LINE" |
| .PP |
| \fIudev\&.log\-priority=\fR |
| .RS 4 |
| Set the logging priority\&. |
| .RE |
| .PP |
| \fIudev\&.children\-max=\fR |
| .RS 4 |
| Limit the number of parallel executed events\&. |
| .RE |
| .PP |
| \fIudev\&.exec\-delay=\fR |
| .RS 4 |
| Number of seconds to delay the execution of RUN instructions\&. This might be useful when debugging system crashes during coldplug cause by loading non\-working kernel modules\&. |
| .RE |
| .SH "AUTHOR" |
| .PP |
| Written by Kay Sievers |
| kay\&.sievers@vrfy\&.org\&. |
| .SH "SEE ALSO" |
| .PP |
| \fBudev\fR(7), |
| \fBudevadm\fR(8) |
