source: chapter06/systemd.xml@ cba2d4e

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Last change on this file since cba2d4e was cba2d4e, checked in by Bruce Dubbs <bdubbs@…>, 10 years ago

Added systemd and dbus to the book.
Set up systemd and System V side-by-side with the
ability to reboot to either system.

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10520 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
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File size: 23.5 KB
RevLine 
[f896e21c]1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
7
[cba2d4e]8<sect1 id="ch-system-systemd" role="wrap">
9 <?dbhtml filename="systemd.html"?>
[f896e21c]10
11 <sect1info condition="script">
[cba2d4e]12 <productname>systemd</productname>
[f896e21c]13 <productnumber>&systemd-version;</productnumber>
14 <address>&systemd-url;</address>
15 </sect1info>
16
[cba2d4e]17 <title>Systemd-&systemd-version;</title>
[f896e21c]18
[cba2d4e]19 <indexterm zone="ch-system-systemd">
20 <primary sortas="a-Systemd">Systemd</primary>
[f896e21c]21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
[cba2d4e]26 <para>The Systemd package contains programs for controlling the startup,
27 running, and shutdown of the system.</para>
[f896e21c]28
29 <segmentedlist>
30 <segtitle>&buildtime;</segtitle>
31 <segtitle>&diskspace;</segtitle>
32
33 <seglistitem>
34 <seg>&systemd-ch6-sbu;</seg>
35 <seg>&systemd-ch6-du;</seg>
36 </seglistitem>
37 </segmentedlist>
38 </sect2>
39
40 <sect2 role="installation">
[cba2d4e]41 <title>Installation of Systemd</title>
[f896e21c]42
[cba2d4e]43 <para>First, create a file to allow Systemd to build when using Util-Linux
44 built in Chapter 5:</para>
[d7f2eb0]45
[cba2d4e]46<screen><userinput remap="pre">cat &gt; config.cache &lt;&lt; "EOF"
47<literal>KILL=/bin/kill
48HAVE_BLKID=1
49BLKID_LIBS="-lblkid"
50BLKID_CFLAGS="-I/tools/include/blkid"</literal>
51EOF</userinput></screen>
[f896e21c]52
[cba2d4e]53 <para>Aditionally, fix a build error when using Util-Linux built in
54 Chapter 5:</para>
[f896e21c]55
[cba2d4e]56<screen><userinput remap="pre">sed -i "s:blkid/::" $(grep -rl "blkid/blkid.h")</userinput></screen>
[053b206]57
[cba2d4e]58 <para>Apply a patch so that compat <command>pkg-config</command> files get
59 installed without installing compat libs which are useless on LFS:</para>
[053b206]60
[cba2d4e]61<screen><userinput remap="pre">patch -Np1 -i ../&systemd-compat-patch;</userinput></screen>
[f896e21c]62
[cba2d4e]63 <para>Prepare Systemd for compilation:</para>
64
65<screen><userinput remap="configure">./configure --prefix=/usr \
66 --sysconfdir=/etc \
67 --localstatedir=/var \
68 --config-cache \
69 --with-rootprefix= \
70 --with-rootlibdir=/lib \
71 --enable-split-usr \
72 --disable-gudev \
73 --without-python \
74 --docdir=/usr/share/doc/systemd-&systemd-version; \
75 --with-dbuspolicydir=/etc/dbus-1/system.d \
76 --with-dbusinterfacedir=/usr/share/dbus-1/interfaces \
77 --with-dbussessionservicedir=/usr/share/dbus-1/services \
78 --with-dbussystemservicedir=/usr/share/dbus-1/system-services</userinput></screen>
79
80 <variablelist>
81 <title>The meaning of the configure options:</title>
82
83 <varlistentry>
84 <term><parameter>--config-cache</parameter></term>
85 <listitem>
86 <para>This switch tells the build system to use
87 the <filename>config.cache</filename> file which
88 was created earlier.</para>
89 </listitem>
90 </varlistentry>
91
92 <varlistentry>
93 <term><parameter>--with-root*</parameter></term>
94 <listitem>
95 <para>These switches ensure that core programs and
96 shared libraries are installed in the subdirectories
97 of the root partition.</para>
98 </listitem>
99 </varlistentry>
100
101 <varlistentry>
102 <term><parameter>--enable-split-usr</parameter></term>
103 <listitem>
104 <para>This switch ensures that Systemd will work on
105 systems where /bin, /lib and /sbin directories are not
106 symlinks to their /usr counterparts.</para>
107 </listitem>
108 </varlistentry>
109
110 <varlistentry>
111 <term><parameter>--disable-gudev --without-python</parameter></term>
112 <listitem>
113 <para>These switches disable optional features because
114 LFS does not provide their dependencies.</para>
115 </listitem>
116 </varlistentry>
117
118 <varlistentry>
119 <term><parameter>--with-dbus*</parameter></term>
120 <listitem>
121 <para>These switches ensure that D-Bus configuratil files
122 get installed in the correct locations.</para>
123 </listitem>
124 </varlistentry>
125
126 </variablelist>
127
128 <para>Compile the package:</para>
129
130<screen><userinput remap="make">make LIBRARY_PATH=/tools/lib</userinput></screen>
131
132 <para>First prevent few broken test cases from running:</para>
133
134<screen><userinput remap="test">sed -e "s:test/udev-test.pl::g" \
135 -e "s:test-bus-cleanup\$(EXEEXT) ::g" \
136 -e "s:test-bus-gvariant\$(EXEEXT) ::g" \
137 -i Makefile</userinput></screen>
138
139 <para>To test the results, issue:</para>
140
141<screen><userinput remap="test">make -k check</userinput></screen>
142
143 <para>Note that some tests might fail because the test are being run in a
144 chroot environment. For full test coverage, the test suite should be run
145 from a system booted using Systemd.</para>
[f896e21c]146
147 <para>Install the package:</para>
148
[cba2d4e]149<screen><userinput remap="install">make LD_LIBRARY_PATH=/tools/lib install</userinput></screen>
150
151 <para>Move NSS myhostname library to <filename
152 class="directory">/lib</filename>:</para>
153
154<screen><userinput remap="install">mv -v /usr/lib/libnss_myhostname.so.2 /lib</userinput></screen>
155
156 <para>Remove an unnecessary directory:</para>
157
158<screen><userinput remap="install">rm -rfv /usr/lib/rpm</userinput></screen>
[b7da138f]159
[cba2d4e]160 <para>Create the Sysvinit compatibility symlinks, and move some man pages
161 and a library that conflict with <xref linkend="ch-system-sysvinit"/> so
162 both systems can be installed side-by-side:</para>
[b7da138f]163
[cba2d4e]164<screen><userinput remap="install">for tool in runlevel reboot shutdown poweroff halt telinit; do
165 ln -sfv ../bin/systemctl /sbin/${tool}-systemd
166 mv -v /usr/share/man/man8/${tool}.8 /usr/share/man/man8/${tool}-systemd.8
167done
[b7da138f]168
[cba2d4e]169ln -sfv ../lib/systemd/systemd /sbin/init-systemd
170mv -v /etc/init.d /etc/init.d-systemd</userinput></screen>
[d29a03b]171
[cba2d4e]172 <para>Remove a reference to a non-existent group:</para>
[d29a03b]173
[cba2d4e]174<screen><userinput remap="install">sed -i "s:0775 root lock:0755 root root:g" /usr/lib/tmpfiles.d/legacy.conf</userinput></screen>
[053b206]175
[cba2d4e]176 <para>Create the <filename>/etc/machine-id</filename> file needed by
177 Journald:</para>
[053b206]178
[cba2d4e]179<screen><userinput remap="install">systemd-machine-id-setup</userinput></screen>
180
181 <para>Finally install some LFS specific udev rules:</para>
182
183<screen><userinput remap="install">tar -xf ../&udev-lfs-version;.tar.bz2
184make -f &udev-lfs-version;/Makefile.lfs install</userinput></screen>
[053b206]185
[f896e21c]186 </sect2>
187
[cba2d4e]188 <sect2 id="contents-systemd" role="content">
189 <title>Contents of Systemd</title>
[f896e21c]190
191 <segmentedlist>
192 <segtitle>Installed programs</segtitle>
193 <segtitle>Installed libraries</segtitle>
194 <segtitle>Installed directories</segtitle>
195
196 <seglistitem>
[cba2d4e]197 <seg>bootctl, busctl, halt, hostnamectl, init, journalctl, kernel-install,
198 localectl, loginctl, machinectl, poweroff, reboot, runlevel, shutdown,
199 systemctl, systemd-analyze, systemd-ask-password, systemd-cat, systemd-cgls,
200 systemd-cgtop, systemd-coredumpctl, systemd-delta, systemd-detect-virt,
201 systemd-inhibit, systemd-machine-id-setup, systemd-notify, systemd-nspawn,
202 systemd-run, systemd-stdio-bridge, systemd-tmpfiles, systemd-tty-ask-password-agent,
203 telinit, timedatectl, and udevadm</seg>
204
205 <seg>libnss_myhostname.so.2, libsystemd.so, libudev.so</seg>
206 <seg>/etc/binfmt.d, /etc/init.d, /etc/kernel, /etc/modules-load.d,
207 /etc/sysctl.d, /etc/systemd, /etc/tmpfiles.d, /etc/udev,
208 /etc/xdg/systemd, /lib/systemd, /lib/udev, /usr/include/systemd,
209 /usr/lib/binfmt.d, /usr/lib/kernel, /usr/lib/modules-load.d,
210 /usr/lib/sysctl.d, /usr/lib/systemd, /usr/lib/tmpfiles.d,
211 /usr/share/doc/systemd-&systemd-version;, /usr/share/systemd,
212 /var/lib/systemd, /var/log/journal</seg>
[f896e21c]213 </seglistitem>
214 </segmentedlist>
215
216 <variablelist>
217 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
218 <?dbfo list-presentation="list"?>
219 <?dbhtml list-presentation="table"?>
220
[cba2d4e]221 <varlistentry id="bootctl">
222 <term><command>bootctl</command></term>
223 <listitem>
224 <para>used to query the firmware and boot manager settings.</para>
225 <indexterm zone="ch-system-systemd bootctl">
226 <primary sortas="b-bootctl">bootctl</primary>
227 </indexterm>
228 </listitem>
229 </varlistentry>
230
231 <varlistentry id="busctl">
232 <term><command>busctl</command></term>
233 <listitem>
234 <para>used to introspect and monitor the D-Bus bus.</para>
235 <indexterm zone="ch-system-systemd busctl">
236 <primary sortas="b-busctl">busctl</primary>
237 </indexterm>
238 </listitem>
239 </varlistentry>
240
241 <varlistentry id="halt">
242 <term><command>halt</command></term>
243 <listitem>
244 <para>Normally invokes <command>shutdown</command> with the
245 <parameter>-h</parameter> option, except when already in run-level 0,
246 then it tells the kernel to halt the system; it notes in the
247 file <filename>/var/log/wtmp</filename> that the system is being
248 brought down.</para>
249 <indexterm zone="ch-system-systemd halt">
250 <primary sortas="b-halt">halt</primary>
251 </indexterm>
252 </listitem>
253 </varlistentry>
254
255 <varlistentry id="hostnamectl">
256 <term><command>hostnamectl</command></term>
257 <listitem>
258 <para>used to query and change the system hostname and related
259 settings.</para>
260 <indexterm zone="ch-system-systemd hostnamectl">
261 <primary sortas="b-hostnamectl">hostnamectl</primary>
262 </indexterm>
263 </listitem>
264 </varlistentry>
265
266 <varlistentry id="init">
267 <term><command>init</command></term>
268 <listitem>
269 <para>The first process to be started when the kernel has initialized
270 the hardware which takes over the boot process and starts all the
271 proceses it is instructed to.</para>
272 <indexterm zone="ch-system-systemd init">
273 <primary sortas="b-init">init</primary>
274 </indexterm>
275 </listitem>
276 </varlistentry>
277
278 <varlistentry id="journalctl">
279 <term><command>journalctl</command></term>
280 <listitem>
281 <para>used to query the contents of the Systemd Journal.</para>
282 <indexterm zone="ch-system-systemd journalctl">
283 <primary sortas="b-journalctl">journalctl</primary>
284 </indexterm>
285 </listitem>
286 </varlistentry>
287
288 <varlistentry id="kernel-install">
289 <term><command>kernel-install</command></term>
290 <listitem>
291 <para>used to add and remove kernel and initramfs images to and
292 from /boot.</para>
293 <indexterm zone="ch-system-systemd kernel-install">
294 <primary sortas="b-kernel-install">kernel-install</primary>
295 </indexterm>
296 </listitem>
297 </varlistentry>
298
299 <varlistentry id="localectl">
300 <term><command>localectl</command></term>
301 <listitem>
302 <para>used to query and change the system locale and keyboard layout
303 settings.</para>
304 <indexterm zone="ch-system-systemd localectl">
305 <primary sortas="b-localectl">localectl</primary>
306 </indexterm>
307 </listitem>
308 </varlistentry>
309
310 <varlistentry id="loginctl">
311 <term><command>loginctl</command></term>
312 <listitem>
313 <para>used to introspect and control the state of the Systemd Login
314 Manager.</para>
315 <indexterm zone="ch-system-systemd loginctl">
316 <primary sortas="b-loginctl">loginctl</primary>
317 </indexterm>
318 </listitem>
319 </varlistentry>
320
321 <varlistentry id="machinectl">
322 <term><command>machinectl</command></term>
323 <listitem>
324 <para>used to introspect and control the state of the Systemd Virtual
325 Machine and Container Registration Manager</para>
326 <indexterm zone="ch-system-systemd machinectl">
327 <primary sortas="b-machinectl">machinectl</primary>
328 </indexterm>
329 </listitem>
330 </varlistentry>
331
332 <varlistentry id="poweroff">
333 <term><command>poweroff</command></term>
334 <listitem>
335 <para>Tells the kernel to halt the system and switch off the computer
336 (see <command>halt</command>).</para>
337 <indexterm zone="ch-system-systemd poweroff">
338 <primary sortas="b-poweroff">poweroff</primary>
339 </indexterm>
340 </listitem>
341 </varlistentry>
342
343 <varlistentry id="reboot">
344 <term><command>reboot</command></term>
[f896e21c]345 <listitem>
[cba2d4e]346 <para>Tells the kernel to reboot the system (see
347 <command>halt</command>).</para>
348 <indexterm zone="ch-system-systemd reboot">
349 <primary sortas="b-reboot">reboot</primary>
[f896e21c]350 </indexterm>
351 </listitem>
352 </varlistentry>
353
[cba2d4e]354 <varlistentry id="runlevel">
355 <term><command>runlevel</command></term>
[f896e21c]356 <listitem>
[cba2d4e]357 <para>Reports the previous and the current run-level, as noted in the
358 last run-level record in <filename>/var/run/utmp</filename>.</para>
359 <indexterm zone="ch-system-systemd runlevel">
360 <primary sortas="b-runlevel">runlevel</primary>
[f896e21c]361 </indexterm>
362 </listitem>
363 </varlistentry>
364
[cba2d4e]365 <varlistentry id="shutdown">
366 <term><command>shutdown</command></term>
[f896e21c]367 <listitem>
[cba2d4e]368 <para>Brings the system down in a secure way, signaling all processes
369 and notifying all logged-in users.</para>
370 <indexterm zone="ch-system-systemd shutdown">
371 <primary sortas="b-shutdown">shutdown</primary>
[f896e21c]372 </indexterm>
373 </listitem>
374 </varlistentry>
375
[cba2d4e]376 <varlistentry id="systemctl">
377 <term><command>systemctl</command></term>
[f896e21c]378 <listitem>
[cba2d4e]379 <para>used to introspect and control the state of the Systemd system and
380 service manager.</para>
381 <indexterm zone="ch-system-systemd systemctl">
382 <primary sortas="b-systemctl">systemctl</primary>
383 </indexterm>
384 </listitem>
385 </varlistentry>
386
387 <varlistentry id="systemd-analyze">
388 <term><command>systemd-analyze</command></term>
389 <listitem>
390 <para>used to determine system boot-up performance of the current boot.
391 </para>
392 <indexterm zone="ch-system-systemd systemd-analyze">
393 <primary sortas="b-systemd-analyze">systemd-analyze</primary>
394 </indexterm>
395 </listitem>
396 </varlistentry>
397
398 <varlistentry id="systemd-ask-password">
399 <term><command>systemd-ask-password</command></term>
400 <listitem>
401 <para>used to query a system password or passphrase from the user, using a
402 question message specified on the command line.</para>
403 <indexterm zone="ch-system-systemd systemd-ask-password">
404 <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
405 </indexterm>
406 </listitem>
407 </varlistentry>
408
409 <varlistentry id="systemd-cat">
410 <term><command>systemd-cat</command></term>
411 <listitem>
412 <para>used to connect STDOUT and STDERR of a process with the Journal.
413 </para>
414 <indexterm zone="ch-system-systemd systemd-cat">
415 <primary sortas="b-systemd-cat">systemd-cat</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 <varlistentry id="systemd-cgls">
421 <term><command>systemd-cgls</command></term>
422 <listitem>
423 <para>recursively shows the contents of the selected Linux control group
424 hierarchy in a tree.</para>
425 <indexterm zone="ch-system-systemd systemd-cgls">
426 <primary sortas="b-systemd-cgls">systemd-cgls</primary>
427 </indexterm>
428 </listitem>
429 </varlistentry>
430
431 <varlistentry id="systemd-cgtop">
432 <term><command>systemd-cgtop</command></term>
433 <listitem>
434 <para>shows the top control groups of the local Linux control group hierarchy,
435 ordered by their CPU, memory and disk I/O load.</para>
436 <indexterm zone="ch-system-systemd systemd-cgtop">
437 <primary sortas="b-systemd-cgtop">systemd-cgtop</primary>
438 </indexterm>
439 </listitem>
440 </varlistentry>
441
442 <varlistentry id="systemd-coredumpctl">
443 <term><command>systemd-coredumpctl</command></term>
444 <listitem>
445 <para>used to retrieve coredumps from the Systemd Journal</para>
446 <indexterm zone="ch-system-systemd systemd-coredumpctl">
447 <primary sortas="b-systemd-coredumpctl">systemd-coredumpctl</primary>
448 </indexterm>
449 </listitem>
450 </varlistentry>
451
452 <varlistentry id="systemd-delta">
453 <term><command>systemd-delta</command></term>
454 <listitem>
455 <para>used to identify and compare configuration files in
456 <filename class="directory">/etc</filename> that override default
457 counterparts in <filename class="directory">/usr</filename>.</para>
458 <indexterm zone="ch-system-systemd systemd-delta">
459 <primary sortas="b-systemd-delta">systemd-delta</primary>
460 </indexterm>
461 </listitem>
462 </varlistentry>
463
464 <varlistentry id="systemd-detect-virt">
465 <term><command>systemd-detect-virt</command></term>
466 <listitem>
467 <para>detects execution in a virtualized environment.</para>
468 <indexterm zone="ch-system-systemd systemd-detect-virt">
469 <primary sortas="b-systemd-detect-virt">systemd-detect-virt</primary>
470 </indexterm>
471 </listitem>
472 </varlistentry>
473
474 <varlistentry id="systemd-inhibit">
475 <term><command>systemd-inhibit</command></term>
476 <listitem>
477 <para>used to execute a program with a shutdown, sleep or idle inhibitor lock
478 taken.</para>
479 <indexterm zone="ch-system-systemd systemd-inhibit">
480 <primary sortas="b-systemd-inhibit">systemd-inhibit</primary>
481 </indexterm>
482 </listitem>
483 </varlistentry>
484
485 <varlistentry id="systemd-machine-id-setup">
486 <term><command>systemd-machine-id-setup</command></term>
487 <listitem>
488 <para>used by system installer tools to initialize the machine ID stored in
489 <filename>/etc/machine-id</filename> at install time with a randomly
490 generated ID.</para>
491 <indexterm zone="ch-system-systemd systemd-machine-id-setup">
492 <primary sortas="b-systemd-machine-id-setup">systemd-machine-id-setup</primary>
493 </indexterm>
494 </listitem>
495 </varlistentry>
496
497 <varlistentry id="systemd-notify">
498 <term><command>systemd-notify</command></term>
499 <listitem>
500 <para>used by daemon scripts to notify the init system about status changes.
501 </para>
502 <indexterm zone="ch-system-systemd systemd-notify">
503 <primary sortas="b-systemd-notify">systemd-notify</primary>
504 </indexterm>
505 </listitem>
506 </varlistentry>
507
508 <varlistentry id="systemd-nspawn">
509 <term><command>systemd-nspawn</command></term>
510 <listitem>
511 <para>used to run a command or OS in a light-weight namespace container.</para>
512 <indexterm zone="ch-system-systemd systemd-nspawn">
513 <primary sortas="b-systemd-nspawn">systemd-nspawn</primary>
514 </indexterm>
515 </listitem>
516 </varlistentry>
517
518 <varlistentry id="systemd-run">
519 <term><command>systemd-run</command></term>
520 <listitem>
521 <para>used to create and start a transient .service or a .scope unit and
522 run the specified command in it.</para>
523 <indexterm zone="ch-system-systemd systemd-run">
524 <primary sortas="b-systemd-run">systemd-run</primary>
525 </indexterm>
526 </listitem>
527 </varlistentry>
528
529<!-- <varlistentry id="systemd-stdio-bridge">
530 <term><command>systemd-stdio-bridge</command></term>
531 <listitem>
532 <para>To be completed</para>
533 <indexterm zone="ch-system-systemd systemd-stdio-bridge">
534 <primary sortas="b-systemd-stdio-bridge">systemd-stdio-bridge</primary>
535 </indexterm>
536 </listitem>
537 </varlistentry> -->
538
539 <varlistentry id="systemd-tmpfiles">
540 <term><command>systemd-tmpfiles</command></term>
541 <listitem>
542 <para>creates, deletes and cleans up volatile and temporary files and directories,
543 based on the configuration file format and location specified in
544 <filename class="directory">tmpfiles.d</filename> directories.</para>
545 <indexterm zone="ch-system-systemd systemd-tmpfiles">
546 <primary sortas="b-systemd-tmpfiles">systemd-tmpfiles</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
551 <varlistentry id="systemd-tty-ask-password-agent">
552 <term><command>systemd-tty-ask-password-agent</command></term>
553 <listitem>
554 <para>used to list or process pending Systemd password requests</para>
555 <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
556 <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
561 <varlistentry id="telinit">
562 <term><command>telinit</command></term>
563 <listitem>
564 <para>Tells <command>init</command> which run-level to change to.</para>
565 <indexterm zone="ch-system-systemd telinit">
566 <primary sortas="b-telinit">telinit</primary>
567 </indexterm>
568 </listitem>
569 </varlistentry>
570
571 <varlistentry id="timedatectl">
572 <term><command>timedatectl</command></term>
573 <listitem>
574 <para>used to query and change the system clock and its settings.
575 </para>
576 <indexterm zone="ch-system-systemd timedatectl">
577 <primary sortas="b-timedatectl">timedatectl</primary>
[f896e21c]578 </indexterm>
579 </listitem>
580 </varlistentry>
581
582 <varlistentry id="udevadm">
583 <term><command>udevadm</command></term>
584 <listitem>
[cba2d4e]585 <para>Generic Udev administration tool: controls the udevd daemon,
[f896e21c]586 provides info from the Udev database, monitors uevents, waits for
587 uevents to finish, tests Udev configuration, and triggers uevents
[cba2d4e]588 for a given device.</para>
589 <indexterm zone="ch-system-systemd udevadm">
[f896e21c]590 <primary sortas="b-udevadm">udevadm</primary>
591 </indexterm>
592 </listitem>
593 </varlistentry>
594
[cba2d4e]595 <varlistentry id="libsystemd">
596 <term><filename class="libraryfile">libsystemd</filename></term>
[f896e21c]597 <listitem>
[cba2d4e]598 <para>Systemd utility library.</para>
599 <indexterm zone="ch-system-systemd libsystemd">
600 <primary sortas="c-libsystemd">libsystemd</primary>
[f896e21c]601 </indexterm>
602 </listitem>
603 </varlistentry>
604
605 <varlistentry id="libudev">
606 <term><filename class="libraryfile">libudev</filename></term>
607 <listitem>
[cba2d4e]608 <para>A library to access Udev device information.</para>
609 <indexterm zone="ch-system-systemd libudev">
[f896e21c]610 <primary sortas="c-libudev">libudev</primary>
611 </indexterm>
612 </listitem>
613 </varlistentry>
614
615 </variablelist>
616
617 </sect2>
618
619</sect1>
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