[ff3264f] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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| 7 | <!ENTITY elogind-download-http "https://github.com/elogind/elogind/archive/v&elogind-version;/elogind-&elogind-version;.tar.gz">
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| 8 | <!ENTITY elogind-download-ftp " ">
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[32d76f00] | 9 | <!ENTITY elogind-md5sum "32ab2201281f14738d9c045f3669c14d">
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[645dfa3] | 10 | <!ENTITY elogind-size "1.5 MB">
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[b7e2ce4] | 11 | <!ENTITY elogind-buildsize "41 MB (with tests)">
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[32d76f00] | 12 | <!ENTITY elogind-time "0.2 SBU (with parallelism=4)">
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[ff3264f] | 13 | ]>
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| 14 |
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| 15 | <sect1 id="elogind" revision="sysv" xreflabel="elogind-&elogind-version;">
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| 16 | <?dbhtml filename="elogind.html"?>
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| 17 |
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| 18 |
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| 19 | <title>elogind-&elogind-version;</title>
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| 20 |
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| 21 | <indexterm zone="elogind">
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| 22 | <primary sortas="a-elogind">elogind</primary>
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| 23 | </indexterm>
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| 24 |
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| 25 | <sect2 role="package">
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| 26 | <title>Introduction to elogind</title>
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| 27 |
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| 28 | <para>
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| 29 | <application>elogind</application> is the
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[76a6005] | 30 | <application>systemd</application> project's "logind", extracted to
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[ff3264f] | 31 | be a standalone daemon. It integrates with <xref linkend="linux-pam"/>
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[76a6005] | 32 | to track all the users logged in to a system, and whether they
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[ff3264f] | 33 | are logged in graphically, on the console, or remotely.
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| 34 | <application>Elogind</application> exposes this information via the
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| 35 | standard org.freedesktop.login1 <application>D-Bus</application>
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[76a6005] | 36 | interface, and also through the file system using systemd's standard
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[ff3264f] | 37 | <filename class="directory">/run/systemd</filename> layout.
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| 38 | </para>
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| 39 |
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[dc1a45e] | 40 | &lfs113_checked;
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[ff3264f] | 41 |
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| 42 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 43 | <itemizedlist spacing="compact">
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| 44 | <listitem>
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| 45 | <para>
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| 46 | Download (HTTP): <ulink url="&elogind-download-http;"/>
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| 47 | </para>
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| 48 | </listitem>
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| 49 | <listitem>
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| 50 | <para>
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| 51 | Download (FTP): <ulink url="&elogind-download-ftp;"/>
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| 52 | </para>
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| 53 | </listitem>
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| 54 | <listitem>
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| 55 | <para>
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| 56 | Download MD5 sum: &elogind-md5sum;
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| 57 | </para>
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| 58 | </listitem>
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| 59 | <listitem>
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| 60 | <para>
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| 61 | Download size: &elogind-size;
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| 62 | </para>
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| 63 | </listitem>
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| 64 | <listitem>
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| 65 | <para>
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| 66 | Estimated disk space required: &elogind-buildsize;
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| 67 | </para>
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| 68 | </listitem>
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| 69 | <listitem>
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| 70 | <para>
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| 71 | Estimated build time: &elogind-time;
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| 72 | </para>
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| 73 | </listitem>
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| 74 | </itemizedlist>
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| 75 |
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| 76 | <bridgehead renderas="sect3">elogind Dependencies</bridgehead>
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| 77 |
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| 78 | <bridgehead renderas="sect4">Recommended</bridgehead>
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| 79 | <para role="recommended">
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[992c9e7] | 80 | <xref role="runtime" linkend="dbus"/> (runtime),
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[779b3223] | 81 | <xref linkend="linux-pam"/> (required for Xorg),
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[992c9e7] | 82 | <xref role="runtime" linkend="polkit"/> (runtime),
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[ff3264f] | 83 | <xref linkend="DocBook"/>,
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| 84 | <xref linkend="docbook-xsl"/>, and
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[8558044] | 85 | <xref linkend="libxslt"/> (all three to build the man pages)
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[ff3264f] | 86 | </para>
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| 87 |
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| 88 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 89 | <para role="optional">
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| 90 | <xref linkend="lxml"/>,
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| 91 | <xref linkend="zsh"/>,
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[992c9e7] | 92 | <xref linkend="valgrind"/> (needed for tests),
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[ff3264f] | 93 | <ulink url="https://github.com/linux-audit/audit-userspace">
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| 94 | audit-userspace</ulink>,
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| 95 | <ulink url="https://github.com/scop/bash-completion">
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| 96 | bash-completion</ulink>,
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| 97 | <ulink url="https://mirrors.edge.kernel.org/pub/linux/utils/kernel/kexec/">
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| 98 | kexec</ulink>, and
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[6e2eb5cf] | 99 | <ulink url="https://selinuxproject.org/page/Main_Page">
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[ff3264f] | 100 | SELinux</ulink>
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| 101 | </para>
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| 102 |
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| 103 | <para condition="html" role="usernotes">User Notes:
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| 104 | <ulink url="&blfs-wiki;/elogind"/>
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| 105 | </para>
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| 106 | </sect2>
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| 107 |
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[398b4239] | 108 | <sect2 role="kernel" id="elogind-kernel">
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| 109 | <title>Kernel Configuration</title>
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| 110 |
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| 111 | <para>
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| 112 | Enable the following options in the kernel configuration and recompile the
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| 113 | kernel if necessary:
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| 114 | </para>
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| 115 |
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| 116 | <!-- Spaces are significant in <screen> sections -->
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| 117 | <screen><literal>General setup --->
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| 118 | [*] Control Group support [CONFIG_CGROUPS]
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| 119 | File systems --->
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[6735113] | 120 | [*] Inotify support for userspace [CONFIG_INOTIFY_USER]
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| 121 | Pseudo filesystems --->
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| 122 | [*] Tmpfs POSIX Access Control Lists [CONFIG_TMPFS_POSIX_ACL]</literal></screen>
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[398b4239] | 123 |
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[cce4984] | 124 | <para>
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| 125 | In addition, some tests need the userspace cryptographic kernel API, which
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| 126 | is enabled with:
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| 127 | </para>
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| 128 |
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[c667e1e] | 129 | <screen><literal>-*- Cryptographic API ---> [CONFIG_CRYPTO]
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| 130 | Crypto core or helper --->
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| 131 | <M/*> Userspace cryptographic algorithm configuration [CONFIG_CRYPTO_USER]
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| 132 | Userspace interface --->
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| 133 | <M/*> Hash algorithms [CONFIG_CRYPTO_USER_API_HASH]</literal></screen>
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[cce4984] | 134 |
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[398b4239] | 135 | <indexterm zone="elogind elogind-kernel">
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| 136 | <primary sortas="d-elogind">elogind</primary>
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| 137 | </indexterm>
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| 138 | </sect2>
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| 139 |
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[ff3264f] | 140 | <sect2 role="installation">
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| 141 | <title>Installation of elogind</title>
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[7a1065c] | 142 |
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[ff3264f] | 143 | <para>
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| 144 | Install <application>elogind</application> by running the following
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| 145 | commands:
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| 146 | </para>
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| 147 |
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[65d85668] | 148 | <screen><userinput>sed -i '/Disable polkit/,+8 d' meson.build &&
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| 149 |
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[27e5cd4c] | 150 | sed '/request_name/i\
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| 151 | r = sd_bus_set_exit_on_disconnect(m->bus, true);\
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| 152 | if (r < 0)\
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| 153 | return log_error_errno(r, "Failed to set exit on disconnect: %m");' \
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| 154 | -i src/login/logind.c &&
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| 155 |
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[65d85668] | 156 | mkdir build &&
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[488cea3] | 157 | cd build &&
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[ff3264f] | 158 |
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[91318eb] | 159 | meson setup .. \
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| 160 | --prefix=/usr \
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| 161 | --buildtype=release \
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| 162 | -Dman=auto \
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| 163 | -Dcgroup-controller=elogind \
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| 164 | -Ddbuspolicydir=/etc/dbus-1/system.d &&
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[ff3264f] | 165 | ninja</userinput></screen>
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| 166 |
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| 167 | <para>
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[cce4984] | 168 | To test the results, issue: <command>ninja test</command>. A few tests
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| 169 | are skipped if not run with <systemitem class="username">root</systemitem>
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| 170 | privileges.
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[ff3264f] | 171 | </para>
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| 172 |
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| 173 | <para>
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| 174 | Now, as the <systemitem class="username">root</systemitem> user:
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| 175 | </para>
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| 176 |
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[1ede364c] | 177 | <screen role="root"><userinput>ninja install &&
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[ff3264f] | 178 | ln -sfv libelogind.pc /usr/lib/pkgconfig/libsystemd.pc &&
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| 179 | ln -sfvn elogind /usr/include/systemd</userinput></screen>
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| 180 |
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| 181 | </sect2>
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| 182 |
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| 183 | <sect2 role="commands">
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| 184 | <title>Command Explanations</title>
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| 185 |
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[65d85668] | 186 | <para>
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| 187 | <command>sed ... meson.build</command>: This change allows the
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| 188 | package to be built without polkit being installed (it is still a
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[8558044] | 189 | runtime dependency) but able to use polkit after that package is
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[65d85668] | 190 | installed.
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| 191 | </para>
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| 192 |
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[27e5cd4c] | 193 | <para>
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| 194 | <command>sed ... src/login/logind.c</command>: This change allows the
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| 195 | elogind daemon to exit when it is disconnected from dbus (for example
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| 196 | when dbus is killed).
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| 197 | </para>
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| 198 |
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[ff3264f] | 199 | <para>
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| 200 | <parameter>-Dcgroup-controller=elogind</parameter>: This switch ensures
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| 201 | that <application>elogind</application> is selected as the cgroup
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| 202 | controller, even if booted with another running cgroup controller.
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| 203 | </para>
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| 204 |
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| 205 | <para>
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| 206 | <parameter>-Ddbuspolicydir=/etc/dbus-1/system.d</parameter>: This switch
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| 207 | sets the location of the <application>D-Bus</application> policy
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| 208 | directory.
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| 209 | </para>
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[adb90981] | 210 |
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[cce4984] | 211 | <para>
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| 212 | <parameter>-Dman=auto</parameter>: The default value of this switch is
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| 213 | <emphasis>false</emphasis>. Setting it to <emphasis>auto</emphasis>
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| 214 | allows building and installing the man pages if the recommended
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| 215 | dependencies are installed.
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[adb90981] | 216 | </para>
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[ff3264f] | 217 |
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[6545b53f] | 218 | <para>
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[76a6005] | 219 | <option>-Ddefault-kill-user-processes=false</option>: Determines whether
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[6545b53f] | 220 | the processes of a user should be killed when the user logs out. The
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| 221 | default is <emphasis>true</emphasis>, but this defeats the traditional
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| 222 | use of <command>screen</command> or <command>tmux</command>. This can
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| 223 | also be changed in the configuration file (see below).
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| 224 | </para>
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| 225 |
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[ff3264f] | 226 | <para>
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| 227 | <command>ln -s ...</command>: These commands install symlinks so that
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[76a6005] | 228 | software packages can find the systemd-compatible library and headers.
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[ff3264f] | 229 | </para>
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| 230 |
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| 231 | </sect2>
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| 232 |
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| 233 | <sect2 role="configuration">
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| 234 | <title>Configuring elogind</title>
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| 235 |
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[6545b53f] | 236 | <sect3 id="elogind-config">
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| 237 | <title>Config File</title>
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| 238 | <para>
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| 239 | <filename>/etc/elogind/logind.conf</filename>
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| 240 | </para>
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| 241 |
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| 242 | <indexterm zone="elogind elogind-config">
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| 243 | <primary
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| 244 | sortas="e-etc-elogind-logind.conf">/etc/elogind/logind.conf</primary>
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| 245 | </indexterm>
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| 246 | </sect3>
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| 247 |
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| 248 | <sect3><title>Configuration Information</title>
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| 249 |
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| 250 | <para>
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| 251 | The installed file <filename>/etc/elogind/logind.conf</filename>
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| 252 | contains all the possible options with their defaults, commented
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[76a6005] | 253 | out. You may wish to disable automatically killing user processes when the user logs
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[6545b53f] | 254 | out, by running, as the <systemitem class="username">root</systemitem>
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| 255 | user:
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| 256 | </para>
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| 257 |
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| 258 | <screen role="root"><userinput>sed -e '/\[Login\]/a KillUserProcesses=no' \
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| 259 | -i /etc/elogind/logind.conf</userinput></screen>
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| 260 |
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| 261 | <para>
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| 262 | Each user will need to register a user session using
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| 263 | <application>Linux-PAM</application> at login. The
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| 264 | <filename>/etc/pam.d/system-session</filename> file needs to
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[76a6005] | 265 | be modified and a new file must be created in order for
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[6545b53f] | 266 | <command>elogind</command> to work correctly. Run the following
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| 267 | commands as the <systemitem class="username">root</systemitem> user:
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| 268 | </para>
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[ff3264f] | 269 |
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| 270 | <screen role="root"><userinput>cat >> /etc/pam.d/system-session << "EOF" &&
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| 271 | <literal># Begin elogind addition
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[8558044] | 272 |
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[ff3264f] | 273 | session required pam_loginuid.so
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| 274 | session optional pam_elogind.so
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| 275 |
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| 276 | # End elogind addition</literal>
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| 277 | EOF
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| 278 | cat > /etc/pam.d/elogind-user << "EOF"
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| 279 | <literal># Begin /etc/pam.d/elogind-user
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| 280 |
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| 281 | account required pam_access.so
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| 282 | account include system-account
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| 283 |
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| 284 | session required pam_env.so
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| 285 | session required pam_limits.so
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| 286 | session required pam_unix.so
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| 287 | session required pam_loginuid.so
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| 288 | session optional pam_keyinit.so force revoke
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| 289 | session optional pam_elogind.so
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| 290 |
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| 291 | auth required pam_deny.so
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| 292 | password required pam_deny.so
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| 293 |
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| 294 | # End /etc/pam.d/elogind-user</literal>
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| 295 | EOF</userinput></screen>
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| 296 |
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[6545b53f] | 297 | </sect3>
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[ff3264f] | 298 | </sect2>
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| 299 |
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| 300 | <sect2 role="content" revision="sysv">
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| 301 | <title>Contents</title>
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| 302 |
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| 303 | <segmentedlist>
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| 304 | <segtitle>Installed Programs</segtitle>
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| 305 | <segtitle>Installed Library</segtitle>
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| 306 | <segtitle>Installed Directories</segtitle>
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| 307 |
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| 308 | <seglistitem>
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| 309 | <seg>
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| 310 | busctl,
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| 311 | elogind-inhibit, and
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| 312 | loginctl
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| 313 | </seg>
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| 314 | <seg>
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| 315 | libelogind.so
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| 316 | </seg>
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| 317 | <seg>
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[1ede364c] | 318 | /lib/elogind,
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[ff3264f] | 319 | /etc/elogind,
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| 320 | /usr/include/elogind, and
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| 321 | /usr/share/doc/elogind-&elogind-version;
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| 322 | </seg>
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| 323 | </seglistitem>
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| 324 | </segmentedlist>
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| 325 |
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| 326 | <variablelist>
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| 327 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 328 | <?dbfo list-presentation="list"?>
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| 329 | <?dbhtml list-presentation="table"?>
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| 330 |
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| 331 | <varlistentry id="busctl">
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| 332 | <term><command>busctl</command></term>
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| 333 | <listitem>
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| 334 | <para>
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[4c24eb0a] | 335 | is used to introspect and monitor the D-Bus bus
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[ff3264f] | 336 | </para>
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| 337 | <indexterm zone="elogind busctl">
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| 338 | <primary sortas="b-busctl">busctl</primary>
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| 339 | </indexterm>
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| 340 | </listitem>
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| 341 | </varlistentry>
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| 342 |
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| 343 | <varlistentry id="elogind-inhibit">
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| 344 | <term><command>elogind-inhibit</command></term>
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| 345 | <listitem>
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| 346 | <para>
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| 347 | is used to execute a program with a shutdown, sleep or idle
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[4c24eb0a] | 348 | inhibitor lock taken
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[ff3264f] | 349 | </para>
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| 350 | <indexterm zone="elogind elogind-inhibit">
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| 351 | <primary sortas="b-elogind-inhibit">elogind-inhibit</primary>
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| 352 | </indexterm>
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| 353 | </listitem>
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| 354 | </varlistentry>
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| 355 |
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| 356 | <varlistentry id="loginctl">
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| 357 | <term><command>loginctl</command></term>
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| 358 | <listitem>
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| 359 | <para>
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| 360 | is used to introspect and control the state of the elogind Login
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[4c24eb0a] | 361 | Manager
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[ff3264f] | 362 | </para>
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| 363 | <indexterm zone="elogind loginctl">
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| 364 | <primary sortas="b-loginctl">loginctl</primary>
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| 365 | </indexterm>
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| 366 | </listitem>
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| 367 | </varlistentry>
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| 368 |
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| 369 | <varlistentry id="libelogind">
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| 370 | <term><filename class="libraryfile">libelogind.so</filename></term>
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| 371 | <listitem>
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| 372 | <para>
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[4c24eb0a] | 373 | is the main elogind utility library
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[ff3264f] | 374 | </para>
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| 375 | <indexterm zone="elogind libelogind">
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| 376 | <primary sortas="c-libelogind">libelogind.so</primary>
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| 377 | </indexterm>
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| 378 | </listitem>
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| 379 | </varlistentry>
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| 380 |
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| 381 | </variablelist>
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| 382 |
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| 383 | </sect2>
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| 384 |
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[4c24eb0a] | 385 | </sect1>
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