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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 <filename>systemd-fsckd.service</filename>
socket. 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 project='man-pages'><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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