1 | .\" Title: systemd-udevd.service
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2 | .\" Author: Kay Sievers <kay@vrfy.org>
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3 | .\" Generator: DocBook XSL Stylesheets v1.77.1 <http://docbook.sf.net/>
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4 | .\" Date: 07/20/2012
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5 | .\" Manual: systemd-udevd.service
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6 | .\" Source: systemd
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7 | .\" Language: English
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8 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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9 | .\" Manually updated for udev only for LFS by BRuce Dubbs
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10 | .\" <bdubbs@linuxfromscratch.org>
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11 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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12 | .\"
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13 | .TH "UDEVD" "8" "" "systemd (LFS modified man page)" "udevd"
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14 | .\" -----------------------------------------------------------------
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15 | .\" * Define some portability stuff
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16 | .\" -----------------------------------------------------------------
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17 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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18 | .\" http://bugs.debian.org/507673
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19 | .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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20 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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21 | .ie \n(.g .ds Aq \(aq
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22 | .el .ds Aq '
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23 | .\" -----------------------------------------------------------------
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24 | .\" * set default formatting
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25 | .\" -----------------------------------------------------------------
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26 | .\" disable hyphenation
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27 | .nh
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28 | .\" disable justification (adjust text to left margin only)
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29 | .ad l
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30 | .\" -----------------------------------------------------------------
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31 | .\" * MAIN CONTENT STARTS HERE *
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32 | .\" -----------------------------------------------------------------
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33 | .SH "NAME"
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34 | udevd \- Device event managing daemon
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35 | .SH "SYNOPSIS"
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36 | .PP
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37 | .HP \w'\fB/usr/lib/udevd\fR\ 'u
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38 | \fB/lib/udev/udevd\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]
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39 | .SH "DESCRIPTION"
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40 | .PP
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41 | udevd listens to kernel uevents\&. For every event, udevd executes matching instructions specified in udev rules\&. See
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42 | \fBudev\fR(7)\&.
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43 | .PP
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44 | The behavior of the running daemon can be changed with
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45 | \fBudevadm control\fR\&.
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46 | .SH "OPTIONS"
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47 | .PP
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48 | \fB\-\-daemon\fR
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49 | .RS 4
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50 | Detach and run in the background\&.
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51 | .RE
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52 | .PP
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53 | \fB\-\-debug\fR
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54 | .RS 4
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55 | Print debug messages to stderr\&.
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56 | .RE
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57 | .PP
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58 | \fB\-\-children\-max=\fR
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59 | .RS 4
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60 | Limit the number of parallel executed events\&.
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61 | .RE
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62 | .PP
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63 | \fB\-\-exec\-delay=\fR
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64 | .RS 4
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65 | 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\&.
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66 | .RE
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67 | .PP
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68 | \fB\-\-resolve\-names=\fR
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69 | .RS 4
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70 | Specify when udevd should resolve names of users and groups\&. When set to
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71 | \fBearly\fR
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72 | (the default) names will be resolved when the rules are parsed\&. When set to
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73 | \fBlate\fR
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74 | names will be resolved for every event\&. When set to
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75 | \fBnever\fR
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76 | names will never be resolved and all devices will be owned by root\&.
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77 | .RE
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78 | .PP
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79 | \fB\-\-version\fR
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80 | .RS 4
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81 | Print version number\&.
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82 | .RE
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83 | .PP
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84 | \fB\-\-help\fR
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85 | .RS 4
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86 | Print help text\&.
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87 | .RE
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88 | .SH "ENVIRONMENT"
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89 | .PP
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90 | \fIUDEV_LOG=\fR
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91 | .RS 4
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92 | Set the logging priority\&.
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93 | .RE
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94 | .SH "KERNEL COMMAND LINE"
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95 | .PP
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96 | The parameters starting with "rd\&.", will be read when udev is used in an initrd\&.
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97 | .PP
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98 | \fIudev\&.log\-priority=\fR, \fIrd\&.udev\&.log\-priority=\fR
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99 | .RS 4
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100 | Set the logging priority\&.
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101 | .RE
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102 | .PP
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103 | \fIudev\&.children\-max=\fR, \fIrd\&.udev\&.children\-max=\fR
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104 | .RS 4
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105 | Limit the number of parallel executed events\&.
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106 | .RE
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107 | .PP
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108 | \fIudev\&.exec\-delay=\fR, \fIrd\&.udev\&.exec\-delay=\fR
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109 | .RS 4
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110 | 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\&.
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111 | .RE
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112 | .SH "SEE ALSO"
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113 | .PP
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114 | \fBudev\fR(7),
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115 | \fBudevadm\fR(8)
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