man/udevadm.xml

   1 <?xml version='1.0'?>
   2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   3   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
   4 <!-- SPDX-License-Identifier: LGPL-2.1+ -->
   5
   6 <refentry id="udevadm"
   7           xmlns:xi="http://www.w3.org/2001/XInclude">
   8
   9   <refentryinfo>
  10     <title>udevadm</title>
  11     <productname>systemd</productname>
  12   </refentryinfo>
  13
  14   <refmeta>
  15     <refentrytitle>udevadm</refentrytitle>
  16     <manvolnum>8</manvolnum>
  17   </refmeta>
  18
  19   <refnamediv>
  20     <refname>udevadm</refname><refpurpose>udev management tool</refpurpose>
  21   </refnamediv>
  22
  23   <refsynopsisdiv>
  24     <cmdsynopsis>
  25       <command>udevadm</command>
  26         <arg><option>--debug</option></arg>
  27         <arg><option>--version</option></arg>
  28         <arg><option>--help</option></arg>
  29     </cmdsynopsis>
  30     <cmdsynopsis>
  31       <command>udevadm info <optional>options</optional> <optional>devpath</optional></command>
  32     </cmdsynopsis>
  33     <cmdsynopsis>
  34       <command>udevadm trigger <optional>options</optional> <optional>devpath</optional></command>
  35     </cmdsynopsis>
  36     <cmdsynopsis>
  37       <command>udevadm settle <optional>options</optional></command>
  38     </cmdsynopsis>
  39     <cmdsynopsis>
  40       <command>udevadm control <replaceable>option</replaceable></command>
  41     </cmdsynopsis>
  42     <cmdsynopsis>
  43       <command>udevadm monitor <optional>options</optional></command>
  44     </cmdsynopsis>
  45     <cmdsynopsis>
  46       <command>udevadm test <optional>options</optional> <replaceable>devpath</replaceable></command>
  47     </cmdsynopsis>
  48     <cmdsynopsis>
  49       <command>udevadm test-builtin <optional>options</optional> <replaceable>command</replaceable> <replaceable>devpath</replaceable></command>
  50     </cmdsynopsis>
  51   </refsynopsisdiv>
  52
  53   <refsect1><title>Description</title>
  54     <para><command>udevadm</command> expects a command and command
  55     specific options.  It controls the runtime behavior of
  56     <command>systemd-udevd</command>, requests kernel events, manages
  57     the event queue, and provides simple debugging mechanisms.</para>
  58   </refsect1>
  59
  60   <refsect1><title>Options</title>
  61     <variablelist>
  62       <varlistentry>
  63         <term><option>-d</option></term>
  64         <term><option>--debug</option></term>
  65         <listitem>
  66           <para>Print debug messages to standard error. This option is implied in <command>udevadm test</command> and
  67           <command>udevadm test-builtin</command> commands.</para>
  68         </listitem>
  69       </varlistentry>
  70
  71       <xi:include href="standard-options.xml" xpointer="help" />
  72     </variablelist>
  73
  74     <refsect2><title>udevadm info
  75       <arg choice="opt"><replaceable>options</replaceable></arg>
  76       <arg choice="opt" rep="repeat"><replaceable>devpath</replaceable>|<replaceable>file</replaceable>|<replaceable>unit</replaceable></arg>
  77     </title>
  78
  79       <para>Query the udev database for device information.</para>
  80
  81       <para>Positional arguments should be used to specify one or more devices. Each one may be a device name
  82       (in which case it must start with <filename>/dev/</filename>), a sys path (in which case it must start
  83       with <filename>/sys/</filename>), or a systemd device unit name (in which case it must end with
  84       <literal>.device</literal>, see
  85       <citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
  86       </para>
  87
  88       <variablelist>
  89         <varlistentry>
  90           <term><option>-q</option></term>
  91           <term><option>--query=<replaceable>TYPE</replaceable></option></term>
  92           <listitem>
  93             <para>Query the database for the specified type of device data.
  94             Valid <replaceable>TYPE</replaceable>s are:
  95             <constant>name</constant>, <constant>symlink</constant>,
  96             <constant>path</constant>, <constant>property</constant>,
  97             <constant>all</constant>.</para>
  98           </listitem>
  99         </varlistentry>
 100
 101         <varlistentry>
 102           <term><option>-p</option></term>
 103           <term><option>--path=<replaceable>DEVPATH</replaceable></option></term>
 104           <listitem>
 105             <para>The <filename>/sys</filename> path of the device to query, e.g.
 106             <filename><optional>/sys</optional>/class/block/sda</filename>. This option is an alternative to
 107             the positional argument with a <filename>/sys/</filename> prefix. <command>udevadm info
 108             --path=/class/block/sda</command> is equivalent to <command>udevadm info
 109             /sys/class/block/sda</command>.</para>
 110           </listitem>
 111         </varlistentry>
 112         <varlistentry>
 113           <term><option>-n</option></term>
 114           <term><option>--name=<replaceable>FILE</replaceable></option></term>
 115           <listitem>
 116             <para>The name of the device node or a symlink to query,
 117             e.g. <filename><optional>/dev</optional>/sda</filename>. This option is an alternative to the
 118             positional argument with a <filename>/dev/</filename> prefix. <command>udevadm info
 119             --name=sda</command> is equivalent to <command>udevadm info /dev/sda</command>.</para>
 120           </listitem>
 121         </varlistentry>
 122         <varlistentry>
 123           <term><option>-r</option></term>
 124           <term><option>--root</option></term>
 125           <listitem>
 126             <para>Print absolute paths in <command>name</command> or <command>symlink</command>
 127             query.</para>
 128           </listitem>
 129         </varlistentry>
 130         <varlistentry>
 131           <term><option>-a</option></term>
 132           <term><option>--attribute-walk</option></term>
 133           <listitem>
 134             <para>Print all sysfs properties of the specified device that can be used
 135             in udev rules to match the specified device. It prints all devices
 136             along the chain, up to the root of sysfs that can be used in udev rules.</para>
 137           </listitem>
 138         </varlistentry>
 139         <varlistentry>
 140           <term><option>-x</option></term>
 141           <term><option>--export</option></term>
 142           <listitem>
 143             <para>Print output as key/value pairs. Values are enclosed in single quotes.
 144             This takes effects only when <option>--query=property</option> or
 145             <option>--device-id-of-file=<replaceable>FILE</replaceable></option> is specified.</para>
 146           </listitem>
 147         </varlistentry>
 148         <varlistentry>
 149           <term><option>-P</option></term>
 150           <term><option>--export-prefix=<replaceable>NAME</replaceable></option></term>
 151           <listitem>
 152             <para>Add a prefix to the key name of exported values.
 153             This implies <option>--export</option>.</para>
 154           </listitem>
 155         </varlistentry>
 156         <varlistentry>
 157           <term><option>-d</option></term>
 158           <term><option>--device-id-of-file=<replaceable>FILE</replaceable></option></term>
 159           <listitem>
 160             <para>Print major/minor numbers of the underlying device, where the file lives on.
 161             If this is specified, all positional arguments are ignored.</para>
 162           </listitem>
 163         </varlistentry>
 164         <varlistentry>
 165           <term><option>-e</option></term>
 166           <term><option>--export-db</option></term>
 167           <listitem>
 168             <para>Export the content of the udev database.</para>
 169           </listitem>
 170         </varlistentry>
 171         <varlistentry>
 172           <term><option>-c</option></term>
 173           <term><option>--cleanup-db</option></term>
 174           <listitem>
 175             <para>Cleanup the udev database.</para>
 176           </listitem>
 177         </varlistentry>
 178         <varlistentry>
 179           <term><option>-w<optional>SECONDS</optional></option></term>
 180           <term><option>--wait-for-initialization<optional>=SECONDS</optional></option></term>
 181           <listitem>
 182             <para>Wait for device to be initialized. If argument <replaceable>SECONDS</replaceable>
 183             is not specified, the default is to wait forever.</para>
 184           </listitem>
 185         </varlistentry>
 186
 187         <xi:include href="standard-options.xml" xpointer="help" />
 188       </variablelist>
 189     </refsect2>
 190
 191     <refsect2><title>udevadm trigger
 192       <arg choice="opt"><replaceable>options</replaceable></arg>
 193       <arg choice="opt"><replaceable>devpath</replaceable>|<replaceable>file</replaceable>|<replaceable>unit</replaceable></arg>
 194       </title>
 195       <para>Request device events from the kernel. Primarily used to replay events at system coldplug time.</para>
 196
 197       <para>Takes device specifications as positional arguments. See the description of <command>info</command>
 198       above.</para>
 199
 200       <variablelist>
 201         <varlistentry>
 202           <term><option>-v</option></term>
 203           <term><option>--verbose</option></term>
 204           <listitem>
 205             <para>Print the list of devices which will be triggered.</para>
 206           </listitem>
 207         </varlistentry>
 208         <varlistentry>
 209           <term><option>-n</option></term>
 210           <term><option>--dry-run</option></term>
 211           <listitem>
 212             <para>Do not actually trigger the event.</para>
 213           </listitem>
 214         </varlistentry>
 215         <varlistentry>
 216           <term><option>-t</option></term>
 217           <term><option>--type=<replaceable>TYPE</replaceable></option></term>
 218           <listitem>
 219             <para>Trigger a specific type of devices. Valid types are:
 220             <command>devices</command>, <command>subsystems</command>.
 221             The default value is <command>devices</command>.</para>
 222           </listitem>
 223         </varlistentry>
 224         <varlistentry>
 225           <term><option>-c</option></term>
 226           <term><option>--action=<replaceable>ACTION</replaceable></option></term>
 227           <listitem>
 228             <para>Type of event to be triggered. Possible actions are <literal>add</literal>,
 229             <literal>remove</literal>, <literal>change</literal>, <literal>move</literal>,
 230             <literal>online</literal>, <literal>offline</literal>, <literal>bind</literal>,
 231             and <literal>unbind</literal>. Also, the special value <literal>help</literal> can be used
 232             to list the possible actions. The default value is <literal>change</literal>.
 233             </para>
 234           </listitem>
 235         </varlistentry>
 236         <varlistentry>
 237           <term><option>-s</option></term>
 238           <term><option>--subsystem-match=<replaceable>SUBSYSTEM</replaceable></option></term>
 239           <listitem>
 240             <para>Trigger events for devices which belong to a
 241             matching subsystem. This option supports shell style pattern matching.
 242             When this option is specified more than once, then each matching result is ORed, that is,
 243             all the devices in each subsystem are triggered.</para>
 244           </listitem>
 245         </varlistentry>
 246         <varlistentry>
 247           <term><option>-S</option></term>
 248           <term><option>--subsystem-nomatch=<replaceable>SUBSYSTEM</replaceable></option></term>
 249           <listitem>
 250             <para>Do not trigger events for devices which belong to a matching subsystem. This option
 251             supports shell style pattern matching. When this option is specified more than once,
 252             then each matching result is ANDed, that is, devices which do not match all specified
 253             subsystems are triggered.</para>
 254           </listitem>
 255         </varlistentry>
 256         <varlistentry>
 257           <term><option>-a</option></term>
 258           <term><option>--attr-match=<replaceable>ATTRIBUTE</replaceable>=<replaceable>VALUE</replaceable></option></term>
 259           <listitem>
 260             <para>Trigger events for devices with a matching sysfs attribute. If a value is specified along
 261             with the attribute name, the content of the attribute is matched against the given value using
 262             shell style pattern matching. If no value is specified, the existence of the sysfs attribute is
 263             checked. When this option is specified multiple times, then each matching result is ANDed,
 264             that is, only devices which have all specified attributes are triggered.</para>
 265           </listitem>
 266         </varlistentry>
 267         <varlistentry>
 268           <term><option>-A</option></term>
 269           <term><option>--attr-nomatch=<replaceable>ATTRIBUTE</replaceable>=<replaceable>VALUE</replaceable></option></term>
 270           <listitem>
 271             <para>Do not trigger events for devices with a matching sysfs attribute. If a value is specified
 272             along with the attribute name, the content of the attribute is matched against the given value
 273             using shell style pattern matching. If no value is specified, the existence of the sysfs attribute
 274             is checked. When this option is specified multiple times, then each matching result is ANDed,
 275             that is, only devices which have none of the specified attributes are triggered.</para>
 276           </listitem>
 277         </varlistentry>
 278         <varlistentry>
 279           <term><option>-p</option></term>
 280           <term><option>--property-match=<replaceable>PROPERTY</replaceable>=<replaceable>VALUE</replaceable></option></term>
 281           <listitem>
 282             <para>Trigger events for devices with a matching property value. This option supports shell style
 283             pattern matching. When this option is specified more than once, then each matching result is ORed,
 284             that is, devices which have one of the specified properties are triggered.</para>
 285           </listitem>
 286         </varlistentry>
 287         <varlistentry>
 288           <term><option>-g</option></term>
 289           <term><option>--tag-match=<replaceable>PROPERTY</replaceable></option></term>
 290           <listitem>
 291             <para>Trigger events for devices with a matching tag. When this option is specified multiple times,
 292             then each matching result is ANDed, that is, devices which have all specified tags are triggered.</para>
 293           </listitem>
 294         </varlistentry>
 295         <varlistentry>
 296           <term><option>-y</option></term>
 297           <term><option>--sysname-match=<replaceable>NAME</replaceable></option></term>
 298           <listitem>
 299             <para>Trigger events for devices for which the last component (i.e. the filename) of the
 300             <filename>/sys</filename> path matches the specified <replaceable>PATH</replaceable>. This option
 301             supports shell style pattern matching. When this option is specified more than once, then each
 302             matching result is ORed, that is, all devices which have any of the specified
 303             <replaceable>NAME</replaceable> are triggered.</para>
 304           </listitem>
 305         </varlistentry>
 306         <varlistentry>
 307           <term><option>--name-match=<replaceable>NAME</replaceable></option></term>
 308           <listitem>
 309             <para>Trigger events for devices with a matching device path. When this option is specified more than once,
 310             then each matching result is ORed, that is, all specified devices are triggered.</para>
 311           </listitem>
 312         </varlistentry>
 313         <varlistentry>
 314           <term><option>-b</option></term>
 315           <term><option>--parent-match=<replaceable>SYSPATH</replaceable></option></term>
 316           <listitem>
 317             <para>Trigger events for all children of a given device. When this option is specified more than once,
 318             then each matching result is ORed, that is, all children of each specified device are triggered.</para>
 319           </listitem>
 320         </varlistentry>
 321         <varlistentry>
 322           <term><option>-w</option></term>
 323           <term><option>--settle</option></term>
 324           <listitem>
 325             <para>Apart from triggering events, also waits for those events to
 326             finish. Note that this is different from calling <command>udevadm
 327             settle</command>. <command>udevadm settle</command> waits for all
 328             events to finish. This option only waits for events triggered by
 329             the same command to finish.</para>
 330           </listitem>
 331         </varlistentry>
 332         <varlistentry>
 333           <term><option>--wait-daemon[=<replaceable>SECONDS</replaceable>]</option></term>
 334           <listitem>
 335             <para>Before triggering uevents, wait for systemd-udevd daemon to be initialized.
 336             Optionally takes timeout value. Default timeout is 5 seconds. This is equivalent to invoke
 337             invoking <command>udevadm control --ping</command> before <command>udevadm trigger</command>.</para>
 338           </listitem>
 339         </varlistentry>
 340
 341         <xi:include href="standard-options.xml" xpointer="help" />
 342       </variablelist>
 343
 344       <para>In addition, optional positional arguments can be used
 345       to specify device names or sys paths. They must start with
 346       <filename>/dev</filename> or <filename>/sys</filename>
 347       respectively.</para>
 348     </refsect2>
 349
 350     <refsect2><title>udevadm settle
 351       <arg choice="opt"><replaceable>options</replaceable></arg>
 352     </title>
 353       <para>Watches the udev event queue, and exits if all current events are handled.</para>
 354       <variablelist>
 355         <varlistentry>
 356           <term><option>-t</option></term>
 357           <term><option>--timeout=<replaceable>SECONDS</replaceable></option></term>
 358           <listitem>
 359             <para>Maximum number of seconds to wait for the event
 360             queue to become empty. The default value is 120 seconds. A
 361             value of 0 will check if the queue is empty and always
 362             return immediately. A non-zero value will return an exit
 363             code of 0 if queue became empty before timeout was reached,
 364             non-zero otherwise.</para>
 365           </listitem>
 366         </varlistentry>
 367         <varlistentry>
 368           <term><option>-E</option></term>
 369           <term><option>--exit-if-exists=<replaceable>FILE</replaceable></option></term>
 370           <listitem>
 371             <para>Stop waiting if file exists.</para>
 372           </listitem>
 373         </varlistentry>
 374
 375         <xi:include href="standard-options.xml" xpointer="help" />
 376       </variablelist>
 377
 378       <para>See
 379       <citerefentry><refentrytitle>systemd-udev-settle.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 380       for more information.</para>
 381     </refsect2>
 382
 383     <refsect2><title>udevadm control <replaceable>option</replaceable></title>
 384       <para>Modify the internal state of the running udev daemon.</para>
 385       <variablelist>
 386         <varlistentry>
 387           <term><option>-e</option></term>
 388           <term><option>--exit</option></term>
 389           <listitem>
 390             <para>Signal and wait for systemd-udevd to exit. No option except for
 391             <option>--timeout</option> can be specified after this option.
 392             Note that <filename>systemd-udevd.service</filename> contains
 393             <option>Restart=always</option> and so as a result, this option restarts systemd-udevd.
 394             If you want to stop <filename>systemd-udevd.service</filename>, please use the following:
 395             <programlisting>systemctl stop systemd-udevd-control.socket systemd-udevd-kernel.socket systemd-udevd.service</programlisting>
 396             </para>
 397           </listitem>
 398         </varlistentry>
 399         <varlistentry>
 400           <term><option>-l</option></term>
 401           <term><option>--log-priority=<replaceable>value</replaceable></option></term>
 402           <listitem>
 403             <para>Set the internal log level of
 404             <filename>systemd-udevd</filename>. Valid values are the
 405             numerical syslog priorities or their textual
 406             representations: <option>emerg</option>,
 407             <option>alert</option>, <option>crit</option>,
 408             <option>err</option>, <option>warning</option>,
 409             <option>notice</option>, <option>info</option>, and
 410             <option>debug</option>.</para>
 411           </listitem>
 412         </varlistentry>
 413         <varlistentry>
 414           <term><option>-s</option></term>
 415           <term><option>--stop-exec-queue</option></term>
 416           <listitem>
 417             <para>Signal systemd-udevd to stop executing new events. Incoming events
 418             will be queued.</para>
 419           </listitem>
 420         </varlistentry>
 421         <varlistentry>
 422           <term><option>-S</option></term>
 423           <term><option>--start-exec-queue</option></term>
 424           <listitem>
 425             <para>Signal systemd-udevd to enable the execution of events.</para>
 426           </listitem>
 427         </varlistentry>
 428         <varlistentry>
 429           <term><option>-R</option></term>
 430           <term><option>--reload</option></term>
 431           <listitem>
 432             <para>Signal systemd-udevd to reload the rules files and other databases like the kernel
 433             module index. Reloading rules and databases does not apply any changes to already
 434             existing devices; the new configuration will only be applied to new events.</para>
 435           </listitem>
 436         </varlistentry>
 437         <varlistentry>
 438           <term><option>-p</option></term>
 439           <term><option>--property=<replaceable>KEY</replaceable>=<replaceable>value</replaceable></option></term>
 440           <listitem>
 441             <para>Set a global property for all events.</para>
 442           </listitem>
 443         </varlistentry>
 444         <varlistentry>
 445           <term><option>-m</option></term>
 446           <term><option>--children-max=</option><replaceable>value</replaceable></term>
 447           <listitem>
 448             <para>Set the maximum number of events, systemd-udevd will handle at the
 449             same time.</para>
 450           </listitem>
 451         </varlistentry>
 452         <varlistentry>
 453           <term><option>--ping</option></term>
 454           <listitem>
 455             <para>Send a ping message to systemd-udevd and wait for the reply. This may be useful to check that
 456             systemd-udevd daemon is running.</para>
 457           </listitem>
 458         </varlistentry>
 459         <varlistentry>
 460           <term><option>-t</option></term>
 461           <term><option>--timeout=</option><replaceable>seconds</replaceable></term>
 462           <listitem>
 463             <para>The maximum number of seconds to wait for a reply from systemd-udevd.</para>
 464           </listitem>
 465         </varlistentry>
 466
 467         <xi:include href="standard-options.xml" xpointer="help" />
 468       </variablelist>
 469     </refsect2>
 470
 471     <refsect2><title>udevadm monitor
 472       <arg choice="opt"><replaceable>options</replaceable></arg>
 473     </title>
 474       <para>Listens to the kernel uevents and events sent out by a udev rule
 475       and prints the devpath of the event to the console. It can be used to analyze the
 476       event timing, by comparing the timestamps of the kernel uevent and the udev event.
 477       </para>
 478       <variablelist>
 479         <varlistentry>
 480           <term><option>-k</option></term>
 481           <term><option>--kernel</option></term>
 482           <listitem>
 483             <para>Print the kernel uevents.</para>
 484           </listitem>
 485         </varlistentry>
 486         <varlistentry>
 487           <term><option>-u</option></term>
 488           <term><option>--udev</option></term>
 489           <listitem>
 490             <para>Print the udev event after the rule processing.</para>
 491           </listitem>
 492         </varlistentry>
 493         <varlistentry>
 494           <term><option>-p</option></term>
 495           <term><option>--property</option></term>
 496           <listitem>
 497             <para>Also print the properties of the event.</para>
 498           </listitem>
 499         </varlistentry>
 500         <varlistentry>
 501           <term><option>-s</option></term>
 502           <term><option>--subsystem-match=<replaceable>string[/string]</replaceable></option></term>
 503           <listitem>
 504             <para>Filter kernel uevents and udev events by subsystem[/devtype]. Only events with a matching subsystem value will pass.
 505             When this option is specified more than once, then each matching result is ORed, that is, all devices in the specified
 506             subsystems are monitored.</para>
 507           </listitem>
 508         </varlistentry>
 509         <varlistentry>
 510           <term><option>-t</option></term>
 511           <term><option>--tag-match=<replaceable>string</replaceable></option></term>
 512           <listitem>
 513             <para>Filter udev events by tag. Only udev events with a given tag attached will pass.
 514             When this option is specified more than once, then each matching result is ORed, that is, devices which have one of the
 515             specified tags are monitored.</para>
 516           </listitem>
 517         </varlistentry>
 518
 519         <xi:include href="standard-options.xml" xpointer="help" />
 520       </variablelist>
 521     </refsect2>
 522
 523     <refsect2><title>udevadm test
 524       <arg choice="opt"><replaceable>options</replaceable></arg>
 525       <arg><replaceable>devpath</replaceable></arg>
 526     </title>
 527       <para>Simulate a udev event run for the given device, and print debug output.</para>
 528       <variablelist>
 529         <varlistentry>
 530           <term><option>-a</option></term>
 531           <term><option>--action=<replaceable>ACTION</replaceable></option></term>
 532           <listitem>
 533             <para>Type of event to be simulated. Possible actions are <literal>add</literal>,
 534             <literal>remove</literal>, <literal>change</literal>, <literal>move</literal>,
 535             <literal>online</literal>, <literal>offline</literal>, <literal>bind</literal>,
 536             and <literal>unbind</literal>. Also, the special value <literal>help</literal> can be used
 537             to list the possible actions. The default value is <literal>add</literal>.</para>
 538           </listitem>
 539         </varlistentry>
 540         <varlistentry>
 541           <term><option>-N</option></term>
 542           <term><option>--resolve-names=<constant>early</constant>|<constant>late</constant>|<constant>never</constant></option></term>
 543           <listitem>
 544             <para>Specify when udevadm should resolve names of users
 545             and groups.  When set to <constant>early</constant> (the
 546             default), names will be resolved when the rules are
 547             parsed. When set to <constant>late</constant>, names will
 548             be resolved for every event. When set to
 549             <constant>never</constant>, names will never be resolved
 550             and all devices will be owned by root.</para>
 551           </listitem>
 552         </varlistentry>
 553
 554         <xi:include href="standard-options.xml" xpointer="help" />
 555       </variablelist>
 556     </refsect2>
 557
 558     <refsect2><title>udevadm test-builtin
 559       <arg choice="opt"><replaceable>options</replaceable></arg>
 560       <arg><replaceable>command</replaceable></arg>
 561       <arg><replaceable>devpath</replaceable></arg>
 562     </title>
 563       <para>Run a built-in command <replaceable>COMMAND</replaceable>
 564       for device <replaceable>DEVPATH</replaceable>, and print debug
 565       output.</para>
 566       <variablelist>
 567         <xi:include href="standard-options.xml" xpointer="help" />
 568       </variablelist>
 569     </refsect2>
 570   </refsect1>
 571
 572   <refsect1>
 573     <title>See Also</title>
 574     <para><citerefentry>
 575         <refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum>
 576     </citerefentry>,
 577     <citerefentry>
 578         <refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum>
 579     </citerefentry></para>
 580   </refsect1>
 581 </refentry>