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<?xml version="1.0"?>
<!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="systemd-fsck@.service">
<refentryinfo>
<title>systemd-fsck@.service</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Lennart</firstname>
<surname>Poettering</surname>
<email>lennart@poettering.net</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-fsck@.service</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-fsck@.service</refname>
<refname>systemd-fsck-root.service</refname>
<refname>systemd-fsck</refname>
<refpurpose>File system checker logic</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>systemd-fsck@.service</filename></para>
<para><filename>systemd-fsck-root.service</filename></para>
<para><filename>/usr/lib/systemd/systemd-fsck</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><filename>systemd-fsck@.service</filename> and
<filename>systemd-fsck-root.service</filename> are
services responsible for file system checks. They are
instantiated for each device that is configured for
file system checking.
<filename>systemd-fsck-root.service</filename> is
responsible for file system checks on the root file
system, but in only if the root filesystem wasn't
checked in the initramfs.
<filename>systemd-fsck@.service</filename> is used for
all other file systems and for the root file system in
the initramfs.</para>
<para>Those services are started at boot if
<option>passno</option> in
<filename>/etc/fstab</filename> for the file system is
set to a value greater than zero. The file system
check for root is performed before the other file
systems. Other file systems may be checked in
parallel, except when they are one the same rotating
disk.</para>
<para><filename>systemd-fsck</filename> does not know
any details about specific filesystems, and simply
executes file system checkers specific to each
filesystem type (<filename>/sbin/fsck.*</filename>).
This helper will decide if the filesystem should
actually be checked based on the time since last
check, number of mounts, unclean unmount, etc.</para>
<para><filename>systemd-fsck</filename> will forward
file system checking progress to the console. If a
file system check fails for a service without
<option>nofail</option>, emergency mode is activated,
by isolating to
<filename>emergency.target</filename>.</para>
</refsect1>
<refsect1>
<title>Kernel Command Line</title>
<para><filename>systemd-fsck</filename> understands
one kernel command line parameter:</para>
<variablelist class='kernel-commandline-options'>
<varlistentry>
<term><varname>fsck.mode=</varname></term>
<listitem><para>One of
<literal>auto</literal>,
<literal>force</literal>,
<literal>skip</literal>. Controls the
mode of operation. The default is
<literal>auto</literal>, and ensures
that file system checks are done when
the file system checker deems them
necessary. <literal>force</literal>
unconditionally results in full file
system checks. <literal>skip</literal>
skips any file system
checks.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>fsck.repair=</varname></term>
<listitem><para>One of
<literal>preen</literal>,
<literal>yes</literal>,
<literal>no</literal>. Controls the
mode of operation. The default is <literal>
preen</literal>, and will automatically repair
problems that can be safely fixed. <literal>yes
</literal> will answer yes to all questions by
fsck and <literal>no</literal> will answer no to
all questions.
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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