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373 lines
11 KiB
Groff
373 lines
11 KiB
Groff
'\" t
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.TH "UDEVADM" "8" "" "systemd 202" "udevadm"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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udevadm \- udev management tool
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.SH "SYNOPSIS"
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.HP \w'\fBudevadm\fR\ 'u
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\fBudevadm\fR [\fB\-\-debug\fR] [\fB\-\-version\fR] [\fB\-\-help\fR]
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.HP \w'\fBudevadm\ info\ \fR\fB\fIoptions\fR\fR\ 'u
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\fBudevadm info \fR\fB\fIoptions\fR\fR
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.HP \w'\fBudevadm\ trigger\ \fR\fB[options]\fR\ 'u
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\fBudevadm trigger \fR\fB[options]\fR
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.HP \w'\fBudevadm\ settle\ \fR\fB[options]\fR\ 'u
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\fBudevadm settle \fR\fB[options]\fR
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.HP \w'\fBudevadm\ control\ \fR\fB\fIcommand\fR\fR\ 'u
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\fBudevadm control \fR\fB\fIcommand\fR\fR
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.HP \w'\fBudevadm\ monitor\ \fR\fB[options]\fR\ 'u
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\fBudevadm monitor \fR\fB[options]\fR
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.HP \w'\fBudevadm\ hwdb\ \fR\fB[options]\fR\ 'u
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\fBudevadm hwdb \fR\fB[options]\fR
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.HP \w'\fBudevadm\ test\ \fR\fB[options]\fR\fB\ \fR\fB\fIdevpath\fR\fR\ 'u
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\fBudevadm test \fR\fB[options]\fR\fB \fR\fB\fIdevpath\fR\fR
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.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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\fBudevadm test\-builtin \fR\fB[options]\fR\fB \fR\fB\fIcommand\fR\fR\fB \fR\fB\fIdevpath\fR\fR
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.SH "DESCRIPTION"
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.PP
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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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.SH "OPTIONS"
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.PP
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\fB\-\-debug\fR
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.RS 4
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Print debug messages to stderr\&.
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.RE
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.PP
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\fB\-\-version\fR
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.RS 4
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Print version number\&.
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.RE
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.PP
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\fB\-\-help\fR
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.RS 4
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Print help text\&.
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.RE
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.SS "udevadm info \fIoptions\fR"
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.PP
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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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.PP
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\fB\-\-query=\fR\fB\fItype\fR\fR
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.RS 4
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Query the database for specified type of device data\&. It needs the
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\fB\-\-path\fR
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or
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\fB\-\-name\fR
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to identify the specified device\&. Valid queries are:
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\fBname\fR,
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\fBsymlink\fR,
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\fBpath\fR,
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\fBproperty\fR,
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\fBall\fR\&.
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.RE
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.PP
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\fB\-\-path=\fR\fB\fIdevpath\fR\fR
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.RS 4
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The devpath of the device to query\&.
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.RE
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.PP
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\fB\-\-name=\fR\fB\fIfile\fR\fR
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.RS 4
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The name of the device node or a symlink to query
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.RE
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.PP
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\fB\-\-root\fR
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.RS 4
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Print absolute paths in
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\fBname\fR
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or
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\fBsymlink\fR
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query\&.
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.RE
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.PP
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\fB\-\-attribute\-walk\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-export\fR
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.RS 4
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Print output as key/value pairs\&. Values are enclosed in single quotes\&.
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.RE
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.PP
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\fB\-\-export\-prefix=\fR\fB\fIname\fR\fR
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.RS 4
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Add a prefix to the key name of exported values\&.
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.RE
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.PP
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\fB\-\-device\-id\-of\-file=\fR\fB\fIfile\fR\fR
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.RS 4
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Print major/minor numbers of the underlying device, where the file lives on\&.
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.RE
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.PP
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\fB\-\-export\-db\fR
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.RS 4
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Export the content of the udev database\&.
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.RE
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.PP
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\fB\-\-cleanup\-db\fR
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.RS 4
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Cleanup the udev database\&.
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.RE
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.PP
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\fB\-\-version\fR
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.RS 4
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Print version\&.
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.RE
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.PP
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\fB\-\-help\fR
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.RS 4
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Print help text\&.
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.RE
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.SS "udevadm trigger [options]"
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.PP
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Request device events from the kernel\&. Primarily used to replay events at system coldplug time\&.
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.PP
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\fB\-\-verbose\fR
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.RS 4
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Print the list of devices which will be triggered\&.
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.RE
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.PP
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\fB\-\-dry\-run\fR
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.RS 4
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Do not actually trigger the event\&.
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.RE
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.PP
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\fB\-\-type=\fR\fB\fItype\fR\fR
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.RS 4
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Trigger a specific type of devices\&. Valid types are:
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\fBdevices\fR,
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\fBsubsystems\fR\&. The default value is
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\fBdevices\fR\&.
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.RE
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.PP
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\fB\-\-action=\fR\fB\fIaction\fR\fR
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.RS 4
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Type of event to be triggered\&. The default value is
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\fBchange\fR\&.
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.RE
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.PP
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\fB\-\-subsystem\-match=\fR\fB\fIsubsystem\fR\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-subsystem\-nomatch=\fR\fB\fIsubsystem\fR\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-attr\-match=\fR\fB\fIattribute\fR\fR\fB=\fR\fB\fIvalue\fR\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-attr\-nomatch=\fR\fB\fIattribute\fR\fR\fB=\fR\fB\fIvalue\fR\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-property\-match=\fR\fB\fIproperty\fR\fR\fB=\fR\fB\fIvalue\fR\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-tag\-match=\fR\fB\fIproperty\fR\fR
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.RS 4
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Trigger events for devices with a matching tag\&. This option can be specified multiple times\&.
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.RE
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.PP
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\fB\-\-sysname\-match=\fR\fB\fIname\fR\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-parent\-match=\fR\fB\fIsyspath\fR\fR
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.RS 4
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Trigger events for all children of a given device\&.
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.RE
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.SS "udevadm settle [options]"
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.PP
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Watches the udev event queue, and exits if all current events are handled\&.
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.PP
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\fB\-\-timeout=\fR\fB\fIseconds\fR\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-seq\-start=\fR\fB\fIseqnum\fR\fR
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.RS 4
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Wait only for events after the given sequence number\&.
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.RE
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.PP
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\fB\-\-seq\-end=\fR\fB\fIseqnum\fR\fR
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.RS 4
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Wait only for events before the given sequence number\&.
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.RE
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.PP
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\fB\-\-exit\-if\-exists=\fR\fB\fIfile\fR\fR
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.RS 4
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Stop waiting if file exists\&.
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.RE
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.PP
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\fB\-\-quiet\fR
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.RS 4
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Do not print any output, like the remaining queue entries when reaching the timeout\&.
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.RE
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.PP
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\fB\-\-help\fR
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.RS 4
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Print help text\&.
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.RE
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.SS "udevadm control \fIcommand\fR"
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.PP
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Modify the internal state of the running udev daemon\&.
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.PP
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\fB\-\-exit\fR
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.RS 4
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Signal and wait for udevd to exit\&.
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.RE
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.PP
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\fB\-\-log\-priority=\fR\fB\fIvalue\fR\fR
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.RS 4
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Set the internal log level of udevd\&. Valid values are the numerical syslog priorities or their textual representations:
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\fBerr\fR,
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\fBinfo\fR
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and
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\fBdebug\fR\&.
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.RE
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.PP
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\fB\-\-stop\-exec\-queue\fR
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.RS 4
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Signal udevd to stop executing new events\&. Incoming events will be queued\&.
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.RE
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.PP
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\fB\-\-start\-exec\-queue\fR
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.RS 4
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Signal udevd to enable the execution of events\&.
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.RE
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.PP
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\fB\-\-reload\fR
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.RS 4
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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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.RE
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.PP
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\fB\-\-property=\fR\fB\fIKEY\fR\fR\fB=\fR\fB\fIvalue\fR\fR
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.RS 4
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Set a global property for all events\&.
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.RE
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.PP
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\fB\-\-children\-max=\fR\fIvalue\fR
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.RS 4
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Set the maximum number of events, udevd will handle at the same time\&.
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.RE
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.PP
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\fB\-\-timeout=\fR\fIseconds\fR
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.RS 4
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The maximum number of seconds to wait for a reply from udevd\&.
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.RE
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.PP
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\fB\-\-help\fR
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.RS 4
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Print help text\&.
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.RE
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.SS "udevadm monitor [options]"
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.PP
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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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.PP
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\fB\-\-kernel\fR
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.RS 4
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Print the kernel uevents\&.
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.RE
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.PP
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\fB\-\-udev\fR
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.RS 4
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Print the udev event after the rule processing\&.
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.RE
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.PP
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\fB\-\-property\fR
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.RS 4
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Also print the properties of the event\&.
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.RE
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.PP
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\fB\-\-subsystem\-match=\fR\fB\fIstring[/string]\fR\fR
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.RS 4
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Filter events by subsystem[/devtype]\&. Only udev events with a matching subsystem value will pass\&.
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.RE
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.PP
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\fB\-\-tag\-match=\fR\fB\fIstring\fR\fR
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.RS 4
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Filter events by property\&. Only udev events with a given tag attached will pass\&.
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.RE
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.PP
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\fB\-\-help\fR
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.RS 4
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Print help text\&.
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.RE
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.SS "udevadm hwdb [options]"
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.PP
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Maintain the hardware database index in
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/etc/udev/hwdb\&.bin\&.
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.PP
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\fB\-\-update\fR
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.RS 4
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Compile the hardware database information located in /usr/lib/udev/hwdb\&.d/, /etc/udev/hwdb\&.d/ and store it in
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/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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.RE
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.PP
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\fB\-\-test=\fR\fB\fIstring\fR\fR
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.RS 4
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Query the database with a modalias string, and print the retrieved properties\&.
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.RE
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.PP
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\fB\-\-root=\fR\fB\fIstring\fR\fR
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.RS 4
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Alternative root path in the filesystem for reading and writing files\&.
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.RE
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.SS "udevadm test [options] \fIdevpath\fR"
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.PP
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Simulate a udev event run for the given device, and print debug output\&.
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.PP
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\fB\-\-action=\fR\fB\fIstring\fR\fR
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.RS 4
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The action string\&.
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.RE
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.PP
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\fB\-\-subsystem=\fR\fB\fIstring\fR\fR
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.RS 4
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The subsystem string\&.
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.RE
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.PP
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\fB\-\-help\fR
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.RS 4
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Print help text\&.
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.RE
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.SS "udevadm test\-builtin [options] \fIcommand\fR \fIdevpath\fR"
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.PP
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Run a built\-in command for the given device, and print debug output\&.
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.PP
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\fB\-\-help\fR
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.RS 4
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Print help text\&.
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.RE
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.SH "SEE ALSO"
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.PP
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\fBudev\fR(7)
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\fBudevd.service\fR(8)
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