[d736904] | 1 | '\" t
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| 2 | .TH "UDEVADM" "8" "" "systemd 199" "udevadm"
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| 3 | .\" -----------------------------------------------------------------
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| 4 | .\" * Define some portability stuff
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| 5 | .\" -----------------------------------------------------------------
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| 6 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 7 | .\" http://bugs.debian.org/507673
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| 8 | .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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| 9 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 10 | .ie \n(.g .ds Aq \(aq
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| 11 | .el .ds Aq '
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| 12 | .\" -----------------------------------------------------------------
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| 13 | .\" * set default formatting
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| 14 | .\" -----------------------------------------------------------------
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| 15 | .\" disable hyphenation
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| 16 | .nh
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| 17 | .\" disable justification (adjust text to left margin only)
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| 18 | .ad l
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| 19 | .\" -----------------------------------------------------------------
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| 20 | .\" * MAIN CONTENT STARTS HERE *
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| 21 | .\" -----------------------------------------------------------------
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| 22 | .SH "NAME"
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| 23 | udevadm \- udev management tool
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| 24 | .SH "SYNOPSIS"
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| 25 | .HP \w'\fBudevadm\fR\ 'u
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| 26 | \fBudevadm\fR [\fB\-\-debug\fR] [\fB\-\-version\fR] [\fB\-\-help\fR]
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| 27 | .HP \w'\fBudevadm\ info\ \fR\fB\fIoptions\fR\fR\ 'u
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| 28 | \fBudevadm info \fR\fB\fIoptions\fR\fR
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| 29 | .HP \w'\fBudevadm\ trigger\ \fR\fB[options]\fR\ 'u
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| 30 | \fBudevadm trigger \fR\fB[options]\fR
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| 31 | .HP \w'\fBudevadm\ settle\ \fR\fB[options]\fR\ 'u
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| 32 | \fBudevadm settle \fR\fB[options]\fR
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| 33 | .HP \w'\fBudevadm\ control\ \fR\fB\fIcommand\fR\fR\ 'u
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| 34 | \fBudevadm control \fR\fB\fIcommand\fR\fR
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| 35 | .HP \w'\fBudevadm\ monitor\ \fR\fB[options]\fR\ 'u
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| 36 | \fBudevadm monitor \fR\fB[options]\fR
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| 37 | .HP \w'\fBudevadm\ hwdb\ \fR\fB[options]\fR\ 'u
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| 38 | \fBudevadm hwdb \fR\fB[options]\fR
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| 39 | .HP \w'\fBudevadm\ test\ \fR\fB[options]\fR\fB\ \fR\fB\fIdevpath\fR\fR\ 'u
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| 40 | \fBudevadm test \fR\fB[options]\fR\fB \fR\fB\fIdevpath\fR\fR
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| 41 | .HP \w'\fBudevadm\ test\-builtin\ \fR\fB[options]\fR\fB\ \fR\fB\fIcommand\fR\fR\fB\ \fR\fB\fIdevpath\fR\fR\ 'u
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| 42 | \fBudevadm test\-builtin \fR\fB[options]\fR\fB \fR\fB\fIcommand\fR\fR\fB \fR\fB\fIdevpath\fR\fR
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| 43 | .SH "DESCRIPTION"
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| 44 | .PP
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| 45 | udevadm expects a command and command specific options\&. It controls the runtime behavior of udev, requests kernel events, manages the event queue, and provides simple debugging mechanisms\&.
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| 46 | .SH "OPTIONS"
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| 47 | .PP
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| 48 | \fB\-\-debug\fR
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| 49 | .RS 4
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| 50 | Print debug messages to stderr\&.
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| 51 | .RE
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| 52 | .PP
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| 53 | \fB\-\-version\fR
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| 54 | .RS 4
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| 55 | Print version number\&.
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| 56 | .RE
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| 57 | .PP
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| 58 | \fB\-\-help\fR
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| 59 | .RS 4
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| 60 | Print help text\&.
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| 61 | .RE
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| 62 | .SS "udevadm info \fIoptions\fR"
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| 63 | .PP
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| 64 | Queries the udev database for device information stored in the udev database\&. It can also query the properties of a device from its sysfs representation to help creating udev rules that match this device\&.
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| 65 | .PP
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| 66 | \fB\-\-query=\fR\fB\fItype\fR\fR
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| 67 | .RS 4
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| 68 | Query the database for specified type of device data\&. It needs the
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| 69 | \fB\-\-path\fR
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| 70 | or
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| 71 | \fB\-\-name\fR
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| 72 | to identify the specified device\&. Valid queries are:
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| 73 | \fBname\fR,
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| 74 | \fBsymlink\fR,
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| 75 | \fBpath\fR,
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| 76 | \fBproperty\fR,
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| 77 | \fBall\fR\&.
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| 78 | .RE
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| 79 | .PP
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| 80 | \fB\-\-path=\fR\fB\fIdevpath\fR\fR
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| 81 | .RS 4
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| 82 | The devpath of the device to query\&.
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| 83 | .RE
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| 84 | .PP
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| 85 | \fB\-\-name=\fR\fB\fIfile\fR\fR
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| 86 | .RS 4
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| 87 | The name of the device node or a symlink to query
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| 88 | .RE
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| 89 | .PP
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| 90 | \fB\-\-root\fR
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| 91 | .RS 4
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| 92 | Print absolute paths in
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| 93 | \fBname\fR
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| 94 | or
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| 95 | \fBsymlink\fR
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| 96 | query\&.
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| 97 | .RE
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| 98 | .PP
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| 99 | \fB\-\-attribute\-walk\fR
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| 100 | .RS 4
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| 101 | Print all sysfs properties of the specified device that can be used in udev rules to match the specified device\&. It prints all devices along the chain, up to the root of sysfs that can be used in udev rules\&.
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| 102 | .RE
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| 103 | .PP
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| 104 | \fB\-\-export\fR
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| 105 | .RS 4
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| 106 | Print output as key/value pairs\&. Values are enclosed in single quotes\&.
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| 107 | .RE
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| 108 | .PP
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| 109 | \fB\-\-export\-prefix=\fR\fB\fIname\fR\fR
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| 110 | .RS 4
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| 111 | Add a prefix to the key name of exported values\&.
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| 112 | .RE
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| 113 | .PP
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| 114 | \fB\-\-device\-id\-of\-file=\fR\fB\fIfile\fR\fR
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| 115 | .RS 4
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| 116 | Print major/minor numbers of the underlying device, where the file lives on\&.
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| 117 | .RE
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| 118 | .PP
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| 119 | \fB\-\-export\-db\fR
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| 120 | .RS 4
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| 121 | Export the content of the udev database\&.
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| 122 | .RE
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| 123 | .PP
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| 124 | \fB\-\-cleanup\-db\fR
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| 125 | .RS 4
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| 126 | Cleanup the udev database\&.
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| 127 | .RE
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| 128 | .PP
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| 129 | \fB\-\-version\fR
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| 130 | .RS 4
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| 131 | Print version\&.
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| 132 | .RE
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| 133 | .PP
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| 134 | \fB\-\-help\fR
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| 135 | .RS 4
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| 136 | Print help text\&.
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| 137 | .RE
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| 138 | .SS "udevadm trigger [options]"
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| 139 | .PP
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| 140 | Request device events from the kernel\&. Primarily used to replay events at system coldplug time\&.
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| 141 | .PP
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| 142 | \fB\-\-verbose\fR
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| 143 | .RS 4
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| 144 | Print the list of devices which will be triggered\&.
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| 145 | .RE
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| 146 | .PP
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| 147 | \fB\-\-dry\-run\fR
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| 148 | .RS 4
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| 149 | Do not actually trigger the event\&.
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| 150 | .RE
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| 151 | .PP
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| 152 | \fB\-\-type=\fR\fB\fItype\fR\fR
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| 153 | .RS 4
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| 154 | Trigger a specific type of devices\&. Valid types are:
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| 155 | \fBdevices\fR,
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| 156 | \fBsubsystems\fR\&. The default value is
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| 157 | \fBdevices\fR\&.
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| 158 | .RE
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| 159 | .PP
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| 160 | \fB\-\-action=\fR\fB\fIaction\fR\fR
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| 161 | .RS 4
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| 162 | Type of event to be triggered\&. The default value is
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| 163 | \fBchange\fR\&.
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| 164 | .RE
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| 165 | .PP
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| 166 | \fB\-\-subsystem\-match=\fR\fB\fIsubsystem\fR\fR
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| 167 | .RS 4
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| 168 | Trigger events for devices which belong to a matching subsystem\&. This option can be specified multiple times and supports shell style pattern matching\&.
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| 169 | .RE
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| 170 | .PP
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| 171 | \fB\-\-subsystem\-nomatch=\fR\fB\fIsubsystem\fR\fR
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| 172 | .RS 4
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| 173 | Do not trigger events for devices which belong to a matching subsystem\&. This option can be specified multiple times and supports shell style pattern matching\&.
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| 174 | .RE
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| 175 | .PP
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| 176 | \fB\-\-attr\-match=\fR\fB\fIattribute\fR\fR\fB=\fR\fB\fIvalue\fR\fR
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| 177 | .RS 4
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| 178 | Trigger events for devices with a matching sysfs attribute\&. If a value is specified along with the attribute name, the content of the attribute is matched against the given value using shell style pattern matching\&. If no value is specified, the existence of the sysfs attribute is checked\&. This option can be specified multiple times\&.
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| 179 | .RE
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| 180 | .PP
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| 181 | \fB\-\-attr\-nomatch=\fR\fB\fIattribute\fR\fR\fB=\fR\fB\fIvalue\fR\fR
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| 182 | .RS 4
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| 183 | Do not trigger events for devices with a matching sysfs attribute\&. If a value is specified along with the attribute name, the content of the attribute is matched against the given value using shell style pattern matching\&. If no value is specified, the existence of the sysfs attribute is checked\&. This option can be specified multiple times\&.
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| 184 | .RE
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| 185 | .PP
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| 186 | \fB\-\-property\-match=\fR\fB\fIproperty\fR\fR\fB=\fR\fB\fIvalue\fR\fR
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| 187 | .RS 4
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| 188 | Trigger events for devices with a matching property value\&. This option can be specified multiple times and supports shell style pattern matching\&.
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| 189 | .RE
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| 190 | .PP
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| 191 | \fB\-\-tag\-match=\fR\fB\fIproperty\fR\fR
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| 192 | .RS 4
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| 193 | Trigger events for devices with a matching tag\&. This option can be specified multiple times\&.
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| 194 | .RE
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| 195 | .PP
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| 196 | \fB\-\-sysname\-match=\fR\fB\fIname\fR\fR
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| 197 | .RS 4
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| 198 | Trigger events for devices with a matching sys device name\&. This option can be specified multiple times and supports shell style pattern matching\&.
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| 199 | .RE
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| 200 | .PP
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| 201 | \fB\-\-parent\-match=\fR\fB\fIsyspath\fR\fR
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| 202 | .RS 4
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| 203 | Trigger events for all children of a given device\&.
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| 204 | .RE
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| 205 | .SS "udevadm settle [options]"
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| 206 | .PP
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| 207 | Watches the udev event queue, and exits if all current events are handled\&.
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| 208 | .PP
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| 209 | \fB\-\-timeout=\fR\fB\fIseconds\fR\fR
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| 210 | .RS 4
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| 211 | Maximum number of seconds to wait for the event queue to become empty\&. The default value is 120 seconds\&. A value of 0 will check if the queue is empty and always return immediately\&.
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| 212 | .RE
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| 213 | .PP
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| 214 | \fB\-\-seq\-start=\fR\fB\fIseqnum\fR\fR
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| 215 | .RS 4
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| 216 | Wait only for events after the given sequence number\&.
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| 217 | .RE
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| 218 | .PP
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| 219 | \fB\-\-seq\-end=\fR\fB\fIseqnum\fR\fR
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| 220 | .RS 4
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| 221 | Wait only for events before the given sequence number\&.
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| 222 | .RE
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| 223 | .PP
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| 224 | \fB\-\-exit\-if\-exists=\fR\fB\fIfile\fR\fR
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| 225 | .RS 4
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| 226 | Stop waiting if file exists\&.
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| 227 | .RE
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| 228 | .PP
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| 229 | \fB\-\-quiet\fR
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| 230 | .RS 4
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| 231 | Do not print any output, like the remaining queue entries when reaching the timeout\&.
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| 232 | .RE
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| 233 | .PP
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| 234 | \fB\-\-help\fR
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| 235 | .RS 4
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| 236 | Print help text\&.
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| 237 | .RE
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| 238 | .SS "udevadm control \fIcommand\fR"
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| 239 | .PP
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| 240 | Modify the internal state of the running udev daemon\&.
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| 241 | .PP
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| 242 | \fB\-\-exit\fR
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| 243 | .RS 4
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| 244 | Signal and wait for udevd to exit\&.
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| 245 | .RE
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| 246 | .PP
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| 247 | \fB\-\-log\-priority=\fR\fB\fIvalue\fR\fR
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| 248 | .RS 4
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| 249 | Set the internal log level of udevd\&. Valid values are the numerical syslog priorities or their textual representations:
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| 250 | \fBerr\fR,
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| 251 | \fBinfo\fR
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| 252 | and
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| 253 | \fBdebug\fR\&.
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| 254 | .RE
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| 255 | .PP
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| 256 | \fB\-\-stop\-exec\-queue\fR
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| 257 | .RS 4
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| 258 | Signal udevd to stop executing new events\&. Incoming events will be queued\&.
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| 259 | .RE
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| 260 | .PP
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| 261 | \fB\-\-start\-exec\-queue\fR
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| 262 | .RS 4
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| 263 | Signal udevd to enable the execution of events\&.
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| 264 | .RE
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| 265 | .PP
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| 266 | \fB\-\-reload\fR
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| 267 | .RS 4
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| 268 | Signal udevd to reload the rules files and other databases like the kernel module index\&. Reloading rules and databases does not apply any changes to already existing devices; the new configuration will only be applied to new events\&.
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| 269 | .RE
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| 270 | .PP
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| 271 | \fB\-\-property=\fR\fB\fIKEY\fR\fR\fB=\fR\fB\fIvalue\fR\fR
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| 272 | .RS 4
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| 273 | Set a global property for all events\&.
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| 274 | .RE
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| 275 | .PP
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| 276 | \fB\-\-children\-max=\fR\fIvalue\fR
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| 277 | .RS 4
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| 278 | Set the maximum number of events, udevd will handle at the same time\&.
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| 279 | .RE
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| 280 | .PP
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| 281 | \fB\-\-timeout=\fR\fIseconds\fR
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| 282 | .RS 4
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| 283 | The maximum number of seconds to wait for a reply from udevd\&.
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| 284 | .RE
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| 285 | .PP
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| 286 | \fB\-\-help\fR
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| 287 | .RS 4
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| 288 | Print help text\&.
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| 289 | .RE
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| 290 | .SS "udevadm monitor [options]"
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| 291 | .PP
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| 292 | Listens to the kernel uevents and events sent out by a udev rule and prints the devpath of the event to the console\&. It can be used to analyze the event timing, by comparing the timestamps of the kernel uevent and the udev event\&.
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| 293 | .PP
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| 294 | \fB\-\-kernel\fR
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| 295 | .RS 4
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| 296 | Print the kernel uevents\&.
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| 297 | .RE
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| 298 | .PP
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| 299 | \fB\-\-udev\fR
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| 300 | .RS 4
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| 301 | Print the udev event after the rule processing\&.
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| 302 | .RE
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| 303 | .PP
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| 304 | \fB\-\-property\fR
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| 305 | .RS 4
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| 306 | Also print the properties of the event\&.
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| 307 | .RE
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| 308 | .PP
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| 309 | \fB\-\-subsystem\-match=\fR\fB\fIstring[/string]\fR\fR
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| 310 | .RS 4
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| 311 | Filter events by subsystem[/devtype]\&. Only udev events with a matching subsystem value will pass\&.
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| 312 | .RE
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| 313 | .PP
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| 314 | \fB\-\-tag\-match=\fR\fB\fIstring\fR\fR
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| 315 | .RS 4
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| 316 | Filter events by property\&. Only udev events with a given tag attached will pass\&.
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| 317 | .RE
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| 318 | .PP
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| 319 | \fB\-\-help\fR
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| 320 | .RS 4
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| 321 | Print help text\&.
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| 322 | .RE
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| 323 | .SS "udevadm hwdb [options]"
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| 324 | .PP
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| 325 | Maintain the hardware database index in
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| 326 | /etc/udev/hwdb\&.bin\&.
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| 327 | .PP
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| 328 | \fB\-\-update\fR
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| 329 | .RS 4
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| 330 | Compile the hardware database information located in /usr/lib/udev/hwdb\&.d/, /etc/udev/hwdb\&.d/ and store it in
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| 331 | /etc/udev/hwdb\&.bin\&. This should be done after any update to the source files; it will not be called automatically\&. The running udev daemon will detect a new database on its own and does not need to be notified about it\&.
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| 332 | .RE
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| 333 | .PP
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| 334 | \fB\-\-test=\fR\fB\fIstring\fR\fR
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| 335 | .RS 4
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| 336 | Query the database with a modalias string, and print the retrieved properties\&.
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| 337 | .RE
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| 338 | .PP
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| 339 | \fB\-\-root=\fR\fB\fIstring\fR\fR
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| 340 | .RS 4
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| 341 | Alternative root path in the filesystem for reading and writing files\&.
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| 342 | .RE
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| 343 | .SS "udevadm test [options] \fIdevpath\fR"
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| 344 | .PP
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| 345 | Simulate a udev event run for the given device, and print debug output\&.
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| 346 | .PP
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| 347 | \fB\-\-action=\fR\fB\fIstring\fR\fR
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| 348 | .RS 4
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| 349 | The action string\&.
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| 350 | .RE
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| 351 | .PP
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| 352 | \fB\-\-subsystem=\fR\fB\fIstring\fR\fR
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| 353 | .RS 4
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| 354 | The subsystem string\&.
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| 355 | .RE
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| 356 | .PP
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| 357 | \fB\-\-help\fR
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| 358 | .RS 4
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| 359 | Print help text\&.
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| 360 | .RE
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| 361 | .SS "udevadm test\-builtin [options] \fIcommand\fR \fIdevpath\fR"
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| 362 | .PP
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| 363 | Run a built\-in command for the given device, and print debug output\&.
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| 364 | .PP
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| 365 | \fB\-\-help\fR
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| 366 | .RS 4
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| 367 | Print help text\&.
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| 368 | .RE
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| 369 | .SH "SEE ALSO"
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| 370 | .PP
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| 371 | \fBudev\fR(7)
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| 372 | \fBudevd.service\fR(8)
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