Add man page and references to it.

Add man page explaining the plymouth theme protocol, usage of the daemon
as well as the socket activation part.
Adapt existing fsck man page.

5 files changed, 189 insertions, 14 deletions

diff --git a/Makefile-man.am b/Makefile-man.am
index d0fb9aa1ae..7a9612e311 100644
--- a/Makefile-man.am
+++ b/Makefile-man.am
@@ -66,6 +66,7 @@ MANPAGES += \
 	man/systemd-efi-boot-generator.8 \
 	man/systemd-escape.1 \
 	man/systemd-fsck@.service.8 \
+	man/systemd-fsckd.service.8 \
 	man/systemd-fstab-generator.8 \
 	man/systemd-getty-generator.8 \
 	man/systemd-gpt-auto-generator.8 \
@@ -209,6 +210,8 @@ MANPAGES_ALIAS += \
 	man/systemd-ask-password-wall.service.8 \
 	man/systemd-fsck-root.service.8 \
 	man/systemd-fsck.8 \
+	man/systemd-fsckd.8 \
+	man/systemd-fsckd.socket.8 \
 	man/systemd-hibernate-resume.8 \
 	man/systemd-hibernate.service.8 \
 	man/systemd-hybrid-sleep.service.8 \
@@ -321,6 +324,8 @@ man/systemd-ask-password-wall.path.8: man/systemd-ask-password-console.service.8
 man/systemd-ask-password-wall.service.8: man/systemd-ask-password-console.service.8
 man/systemd-fsck-root.service.8: man/systemd-fsck@.service.8
 man/systemd-fsck.8: man/systemd-fsck@.service.8
+man/systemd-fsckd.8: man/systemd-fsckd.service.8
+man/systemd-fsckd.socket.8: man/systemd-fsckd.service.8
 man/systemd-hibernate-resume.8: man/systemd-hibernate-resume@.service.8
 man/systemd-hibernate.service.8: man/systemd-suspend.service.8
 man/systemd-hybrid-sleep.service.8: man/systemd-suspend.service.8
@@ -601,6 +606,12 @@ man/systemd-fsck-root.service.html: man/systemd-fsck@.service.html
 man/systemd-fsck.html: man/systemd-fsck@.service.html
 	$(html-alias)
 
+man/systemd-fsckd.html: man/systemd-fsckd.service.html
+	$(html-alias)
+
+man/systemd-fsckd.socket.html: man/systemd-fsckd.service.html
+	$(html-alias)
+
 man/systemd-hibernate-resume.html: man/systemd-hibernate-resume@.service.html
 	$(html-alias)
 
@@ -1738,6 +1749,7 @@ EXTRA_DIST += \
 	man/systemd-escape.xml \
 	man/systemd-firstboot.xml \
 	man/systemd-fsck@.service.xml \
+	man/systemd-fsckd.service.xml \
 	man/systemd-fstab-generator.xml \
 	man/systemd-getty-generator.xml \
 	man/systemd-gpt-auto-generator.xml \
diff --git a/man/systemd-fsck@.service.xml b/man/systemd-fsck@.service.xml
index 88e11e89d4..69b8fdde2c 100644
--- a/man/systemd-fsck@.service.xml
+++ b/man/systemd-fsck@.service.xml
@@ -81,10 +81,10 @@
     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>
+    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>
@@ -125,16 +125,16 @@
     <title>See Also</title>
     <para>
       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-      <citerefentry><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+      <citerefentry project='man-pages'><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>
+      <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>
 
diff --git a/man/systemd-fsckd.service.xml b/man/systemd-fsckd.service.xml
new file mode 100644
index 0000000000..2ad78448f8
--- /dev/null
+++ b/man/systemd-fsckd.service.xml
@@ -0,0 +1,162 @@
+<?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 2015 Canonical
+
+  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-fsckd.service" xmlns:xi="http://www.w3.org/2001/XInclude">
+
+  <refentryinfo>
+    <title>systemd-fsckd.service</title>
+    <productname>systemd</productname>
+
+    <authorgroup>
+      <author>
+        <contrib>Developer</contrib>
+        <firstname>Didier</firstname>
+        <surname>Roche</surname>
+        <email>didrocks@ubuntu.com</email>
+      </author>
+    </authorgroup>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>systemd-fsckd.service</refentrytitle>
+    <manvolnum>8</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>systemd-fsckd.service</refname>
+    <refname>systemd-fsckd.socket</refname>
+    <refname>systemd-fsckd</refname>
+    <refpurpose>File system check progress reporting</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <para><filename>systemd-fsckd.service</filename></para>
+    <para><filename>systemd-fsckd.socket</filename></para>
+    <para><filename>/usr/lib/systemd/systemd-fsckd</filename></para>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><filename>systemd-fsckd.service</filename> is a service responsible
+    for receiving file system check progress, and communicating some
+    consolidated data to console and plymouth (if running). It also handles
+    possible check cancellations.</para>
+
+    <para><command>systemd-fsckd</command> receives messages about file
+    system check progress from <command>systemd-fsck</command> through a
+    UNIX domain socket. It can display the progress of the least advanced
+    fsck as well as the total number of devices being checked in parallel
+    to the console. It will also send progress messages to plymouth.
+    Both the raw data and translated messages are sent, so compiled
+    plymouth themes can use the raw data to display custom messages, and
+    scripted themes, not supporting i18n, can display the translated
+    versions.</para>
+
+    <para><command>systemd-fsckd</command> will instruct plymouth to grab
+    Control+C keypresses. When the key is pressed, running checks will be
+    terminated. It will also cancel any newly connected fsck instances for
+    the lifetime of <filename>systemd-fsckd</filename>.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>Protocol for communication with plymouth</title>
+
+    <para><filename>systemd-fsckd</filename> passes the
+    following messages to the theme:</para>
+
+    <para>Progress update, sent as a plymouth update message:
+      <literal>fsckd:&lt;num_devices&gt;:&lt;progress&gt;:&lt;string&gt;</literal>
+      <variablelist>
+        <varlistentry>
+          <term><literal>&lt;num_devices&gt;</literal></term>
+          <listitem><para>the current number of devices
+          being checked (int)</para></listitem>
+        </varlistentry>
+        <varlistentry>
+          <term><literal>&lt;progress&gt;</literal></term>
+          <listitem><para>the current minimum percentage of
+          all devices being checking (float, from 0 to 100)</para></listitem>
+        </varlistentry>
+        <varlistentry>
+          <term><literal>&lt;string&gt;</literal></term>
+          <listitem><para>a translated message ready to be displayed
+          by the plymouth theme displaying the data above. It can be overriden
+          by themes supporting i18n.</para></listitem>
+        </varlistentry>
+      </variablelist>
+    </para>
+
+    <para>Cancel message, sent as a traditional plymouth message:
+      <literal>fsckd-cancel-msg:&lt;string&gt;</literal>
+      <variablelist>
+        <varlistentry>
+          <term><literal>&lt;strings&gt;</literal></term>
+          <listitem><para>a translated string ready to be displayed
+          by the plymouth theme indicating that Control+C can be used to cancel
+          current checks. It can be overriden (matching only
+          <literal>fsckd-cancel-msg</literal> prefix)
+          by themes supporting i18n.</para></listitem>
+        </varlistentry>
+      </variablelist>
+    </para>
+  </refsect1>
+
+  <refsect1>
+    <title>Options</title>
+
+    <para>The following options are understood:</para>
+
+    <variablelist>
+      <xi:include href="standard-options.xml" xpointer="help" />
+      <xi:include href="standard-options.xml" xpointer="version" />
+    </variablelist>
+
+  </refsect1>
+
+  <refsect1>
+    <title>Exit status</title>
+
+    <para>On success, 0 is returned, a non-zero failure
+    code otherwise. Note that the daemon stays idle for
+    a while to accept new <filename>systemd-fsck</filename>
+    connections before exiting.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>See Also</title>
+    <para>
+      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-fsck</refentrytitle><manvolnum>8</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>
diff --git a/units/systemd-fsckd.service.in b/units/systemd-fsckd.service.in
index 27c325f778..9c7ed5146d 100644
--- a/units/systemd-fsckd.service.in
+++ b/units/systemd-fsckd.service.in
@@ -7,6 +7,7 @@
 
 [Unit]
 Description=File System Check Daemon to report status
+Documentation=man:systemd-fsckd.service(8)
 DefaultDependencies=no
 Requires=systemd-fsckd.socket
 Before=shutdown.target
diff --git a/units/systemd-fsckd.socket b/units/systemd-fsckd.socket
index a8994a1aea..93c4ea9eba 100644
--- a/units/systemd-fsckd.socket
+++ b/units/systemd-fsckd.socket
@@ -7,7 +7,7 @@
 
 [Unit]
 Description=fsck to fsckd communication Socket
-Documentation=man:systemd-fsck@.service(8) man:systemd-fsck-root.service(8)
+Documentation=man:systemd-fsckd.service(8) man:systemd-fsck@.service(8) man:systemd-fsck-root.service(8)
 DefaultDependencies=no
 
 [Socket]