| 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 dbus-download-http "http://dbus.freedesktop.org/releases/dbus/dbus-&dbus-version;.tar.gz">
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| 8 | <!ENTITY dbus-download-ftp " ">
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| 9 | <!ENTITY dbus-md5sum "4717cb8ab5b80978fcadf2b4f2f72e1b">
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| 10 | <!ENTITY dbus-size "1.8 MB">
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| 11 | <!ENTITY dbus-buildsize "109 MB (additional 42 MB for tests)">
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| 12 | <!ENTITY dbus-time "0.4 SBU (additional 1.4 SBU for tests)">
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| 13 | ]>
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| 14 |
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| 15 | <sect1 id="dbus" xreflabel="D-Bus-&dbus-version;">
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| 16 | <?dbhtml filename="dbus.html"?>
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| 17 |
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| 18 | <sect1info>
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| 19 | <othername>$LastChangedBy$</othername>
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| 20 | <date>$Date$</date>
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| 21 | </sect1info>
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| 22 |
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| 23 | <title>D-Bus-&dbus-version;</title>
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| 24 |
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| 25 | <indexterm zone="dbus">
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| 26 | <primary sortas="a-D-Bus">D-Bus</primary>
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| 27 | </indexterm>
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| 28 |
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| 29 | <sect2 role="package">
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| 30 | <title>Introduction to D-Bus</title>
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| 31 |
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| 32 | <para>
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| 33 | <application>D-Bus</application> is a message bus system, a simple
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| 34 | way for applications to talk to one another.
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| 35 | <application>D-Bus</application> supplies both a system daemon (for events
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| 36 | such as <quote>new hardware device added</quote> or <quote>printer queue
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| 37 | changed</quote>) and a per-user-login-session daemon (for general IPC needs
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| 38 | among user applications). Also, the message bus is built on top of a
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| 39 | general one-to-one message passing framework, which can be used by any two
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| 40 | applications to communicate directly (without going through the message bus
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| 41 | daemon).
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| 42 | </para>
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| 43 |
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| 44 | &lfs75_checked;
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| 45 |
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| 46 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 47 | <itemizedlist spacing="compact">
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| 48 | <listitem>
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| 49 | <para>
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| 50 | Download (HTTP): <ulink url="&dbus-download-http;"/>
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| 51 | </para>
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| 52 | </listitem>
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| 53 | <listitem>
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| 54 | <para>
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| 55 | Download (FTP): <ulink url="&dbus-download-ftp;"/>
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| 56 | </para>
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| 57 | </listitem>
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| 58 | <listitem>
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| 59 | <para>
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| 60 | Download MD5 sum: &dbus-md5sum;
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| 61 | </para>
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| 62 | </listitem>
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| 63 | <listitem>
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| 64 | <para>
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| 65 | Download size: &dbus-size;
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| 66 | </para>
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| 67 | </listitem>
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| 68 | <listitem>
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| 69 | <para>
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| 70 | Estimated disk space required: &dbus-buildsize;
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| 71 | </para>
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| 72 | </listitem>
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| 73 | <listitem>
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| 74 | <para>
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| 75 | Estimated build time: &dbus-time;
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| 76 | </para>
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| 77 | </listitem>
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| 78 | </itemizedlist>
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| 79 |
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| 80 | <bridgehead renderas="sect3">D-Bus Dependencies</bridgehead>
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| 81 |
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| 82 | <!--
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| 83 | <bridgehead renderas="sect4">Required</bridgehead>
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| 84 | <para role="required">
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| 85 | <xref linkend="expat"/>
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| 86 | </para>
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| 87 | -->
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| 88 | <bridgehead renderas="sect4">Recommended</bridgehead>
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| 89 | <para role="recommended">
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| 90 | <xref linkend="xorg7-lib"/> (for <command>dbus-launch</command> program)
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| 91 | </para>
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| 92 |
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| 93 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 94 | <para role="optional">
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| 95 | For the tests:
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| 96 | <xref linkend="dbus-glib"/>,
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| 97 | <xref linkend="dbus-python"/>, and
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| 98 | <xref linkend="pygobject2"/>;
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| 99 |
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| 100 | for the API documentation:
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| 101 | <xref linkend="doxygen"/>;
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| 102 |
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| 103 | for man pages and XML/HTML documentation:
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| 104 | <xref linkend="xmlto"/>
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| 105 | </para>
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| 106 |
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| 107 | <para condition="html" role="usernotes">User Notes:
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| 108 | <ulink url="&blfs-wiki;/dbus"/>
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| 109 | </para>
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| 110 | </sect2>
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| 111 |
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| 112 | <sect2 role="installation">
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| 113 | <title>Installation of D-Bus</title>
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| 114 |
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| 115 | <para>
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| 116 | As the <systemitem class="username">root</systemitem> user, create a
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| 117 | system user and group to handle the system message bus activity:
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| 118 | </para>
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| 119 |
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| 120 | <screen role="root"><userinput>groupadd -g 18 messagebus &&
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| 121 | useradd -c "D-Bus Message Daemon User" -d /var/run/dbus \
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| 122 | -u 18 -g messagebus -s /bin/false messagebus</userinput></screen>
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| 123 |
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| 124 | <para>
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| 125 | Install <application>D-Bus</application> by running the following
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| 126 | commands (you may wish to review the output from
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| 127 | <command>./configure --help</command> first and add any desired parameters
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| 128 | to the <command>configure</command> command shown below):
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| 129 | </para>
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| 130 |
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| 131 | <screen><userinput>sed -i -e '539 s/exit/kill_bus_and_exit/' tools/dbus-launch.c &&<!--sed already fixed upstream, remove in next update-->
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| 132 | ./configure --prefix=/usr \
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| 133 | --sysconfdir=/etc \
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| 134 | --localstatedir=/var \
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| 135 | --with-console-auth-dir=/run/console/ \
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| 136 | --without-systemdsystemunitdir \
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| 137 | --disable-systemd \
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| 138 | --disable-static &&
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| 139 | make</userinput></screen>
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| 140 |
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| 141 | <para>
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| 142 | See below for test instructions.
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| 143 | </para>
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| 144 |
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| 145 | <para>
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| 146 | Now, as the <systemitem class="username">root</systemitem> user:
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| 147 | </para>
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| 148 |
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| 149 | <screen role="root"><userinput>make install &&
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| 150 | mv -v /usr/share/doc/dbus /usr/share/doc/dbus-&dbus-version;</userinput></screen>
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| 151 |
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| 152 | <para>
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| 153 | If you are still building your system in chroot or you did not start the
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| 154 | daemon yet, but you want to compile some packages that require
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| 155 | <application>D-Bus</application>, generate
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| 156 | <application>D-Bus</application> UUID to avoid warnings when compiling
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| 157 | some packages with the following command as the
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| 158 | <systemitem class="username">root</systemitem> user:
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| 159 | </para>
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| 160 |
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| 161 | <screen role="root"><userinput>dbus-uuidgen --ensure</userinput></screen>
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| 162 |
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| 163 | <para>
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| 164 | The dbus tests cannot be run until after <xref linkend="dbus-glib"/>
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| 165 | has been installed. They must be run as an unprivileged user from a
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| 166 | local session. Tests fail through ssh. If you want to run only the unit
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| 167 | tests, replace, below, <parameter>--enable-tests</parameter> by
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| 168 | <parameter>--enable-embedded-tests</parameter>, otherwise,
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| 169 | <xref linkend="dbus-python"/> has to be installed, before.
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| 170 | The tests require passing additional parameters to
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| 171 | <command>configure</command> and exposing additional functionality in
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| 172 | the binaries. These interfaces are not intended to be used in a
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| 173 | production build of <application>D-Bus</application>. If you would
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| 174 | like to run the tests, issue the following commands:
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| 175 | </para>
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| 176 |
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| 177 | <screen><userinput>make distclean &&
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| 178 | ./configure --enable-tests --enable-asserts &&
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| 179 | make &&
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| 180 | make check &&
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| 181 | make distclean</userinput></screen>
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| 182 |
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| 183 | <para>
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| 184 | If <command>run-test.sh</command> fails, it can be disabled with the
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| 185 | following sed, before running the commands for the tests:
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| 186 | </para>
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| 187 |
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| 188 | <screen><userinput>sed -i -e 's:run-test.sh:$(NULL):g' test/name-test/Makefile.in</userinput></screen>
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| 189 |
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| 190 | <para>
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| 191 | Note there has been a report that the tests may fail if running
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| 192 | inside a Midnight Commander shell.
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| 193 | You may get out-of-memory error messages when running the tests.
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| 194 | These are normal and can be safely ignored.
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| 195 | </para>
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| 196 |
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| 197 | </sect2>
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| 198 |
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| 199 | <sect2 role="commands">
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| 200 | <title>Command Explanations</title>
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| 201 |
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| 202 | <para><!--already fixed upstream, remove in next update-->
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| 203 | <command>sed -i -e ... tools/dbus-launch.c</command>: fix
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| 204 | <command>dbus-launch</command> to kill bus if we can't attach to a
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| 205 | session when requested.
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| 206 | </para>
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| 207 | <para>
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| 208 | <parameter>--with-console-auth-dir=/run/console/</parameter>: This
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| 209 | parameter specifies location of the
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| 210 | <application>ConsoleKit</application> auth dir.
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| 211 | </para>
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| 212 |
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| 213 | <para>
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| 214 | <parameter>--without-systemdsystemunitdir</parameter>: This switch
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| 215 | prevents installation of systemd unit files.
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| 216 | </para>
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| 217 |
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| 218 | <para>
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| 219 | <parameter>--disable-systemd</parameter>: This switch disables systemd
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| 220 | support in <application>D-Bus</application>
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| 221 | </para>
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| 222 |
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| 223 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 224 | href="../../xincludes/static-libraries.xml"/>
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| 225 |
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| 226 | <para>
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| 227 | <parameter>--enable-tests</parameter>: Build extra parts of the code to
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| 228 | support all tests. Configure will end with a NOTE warning about increased
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| 229 | size of libraries and decreased security.
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| 230 | </para>
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| 231 |
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| 232 | <para>
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| 233 | <parameter>--enable-embedded-tests</parameter>: Build extra parts of the
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| 234 | code to support only unit tests. Configure will end with a NOTE warning
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| 235 | about increased size of libraries and decreased security.
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| 236 | </para>
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| 237 |
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| 238 | <para>
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| 239 | <parameter>--enable-asserts</parameter>: Enable debugging code to run
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| 240 | assertions for statements normally assumed to be true. This prevents a
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| 241 | warning that '<parameter>--enable-tests</parameter>' on its own is only
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| 242 | useful for profiling and might not give true results for all tests, but
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| 243 | adds its own NOTE that this should not be used in a production build.
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| 244 | </para>
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| 245 |
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| 246 | </sect2>
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| 247 |
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| 248 | <sect2 role="configuration">
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| 249 | <title>Configuring dbus</title>
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| 250 |
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| 251 | <sect3 id="dbus-config">
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| 252 | <title>Config Files</title>
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| 253 |
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| 254 | <para>
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| 255 | <filename>/etc/dbus-1/session.conf</filename>,
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| 256 | <filename>/etc/dbus-1/system.conf</filename> and
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| 257 | <filename>/etc/dbus-1/system.d/*</filename>
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| 258 | </para>
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| 259 |
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| 260 | <indexterm zone="dbus dbus-config">
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| 261 | <primary sortas="e-etc-dbus-1-session.conf">/etc/dbus-1/session.conf</primary>
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| 262 | </indexterm>
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| 263 |
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| 264 | <indexterm zone="dbus dbus-config">
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| 265 | <primary sortas="e-etc-dbus-1/system.conf">/etc/dbus-1/system.conf</primary>
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| 266 | </indexterm>
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| 267 |
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| 268 | <indexterm zone="dbus dbus-config">
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| 269 | <primary sortas="e-etc-dbus-1-system.d-star">/etc/dbus-1/system.d/*</primary>
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| 270 | </indexterm>
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| 271 |
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| 272 | </sect3>
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| 273 |
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| 274 | <sect3 id="dbus-session-config" xreflabel="D-Bus custom services directory">
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| 275 | <title>Configuration Information</title>
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| 276 |
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| 277 | <para>
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| 278 | The configuration files listed above should probably not be
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| 279 | modified. If changes are required, you should create
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| 280 | <filename>/etc/dbus-1/session-local.conf</filename> and/or
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| 281 | <filename>/etc/dbus-1/system-local.conf</filename> and make any
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| 282 | desired changes to these files.
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| 283 | </para>
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| 284 |
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| 285 | <para>
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| 286 | If any packages install a
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| 287 | <application>D-Bus</application> <filename>.service</filename>
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| 288 | file outside of the standard <filename
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| 289 | class="directory">/usr/share/dbus-1/services</filename> directory,
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| 290 | that directory should be added to the local session configuration.
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| 291 | For instance, <filename
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| 292 | class="directory">/usr/local/share/dbus-1/services</filename> can
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| 293 | be added by performing the following commands as the
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| 294 | <systemitem class="username">root</systemitem> user:
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| 295 | </para>
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| 296 |
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| 297 | <screen role="root"><userinput>cat > /etc/dbus-1/session-local.conf << "EOF"
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| 298 | <literal><!DOCTYPE busconfig PUBLIC
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| 299 | "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
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| 300 | "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
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| 301 | <busconfig>
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| 302 |
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| 303 | <!-- Search for .service files in /usr/local -->
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| 304 | <servicedir>/usr/local/share/dbus-1/services</servicedir>
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| 305 |
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| 306 | </busconfig></literal>
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| 307 | EOF</userinput></screen>
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| 308 |
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| 309 | </sect3>
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| 310 |
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| 311 | <sect3 id="dbus-init">
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| 312 | <title>Boot Script</title>
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| 313 |
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| 314 | <para>
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| 315 | To automatically start <command>dbus-daemon</command> when the
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| 316 | system is rebooted, install the
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| 317 | <filename>/etc/rc.d/init.d/dbus</filename> bootscript from the
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| 318 | <xref linkend="bootscripts"/> package.
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| 319 | </para>
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| 320 |
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| 321 | <indexterm zone="dbus dbus-init">
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| 322 | <primary sortas="f-dbus">dbus</primary>
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| 323 | </indexterm>
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| 324 |
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| 325 | <screen role="root"><userinput>make install-dbus</userinput></screen>
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| 326 |
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| 327 | <para>
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| 328 | Note that this boot script only starts the system-wide
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| 329 | <application>D-Bus</application> daemon. Each user requiring access to
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| 330 | <application>D-Bus</application> services will also need to run a
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| 331 | session daemon as well. There are many methods you can use to start a
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| 332 | session daemon using the <command>dbus-launch</command> command. Review
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| 333 | the <command>dbus-launch</command> man page for details about the
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| 334 | available parameters and options. Here are some suggestions and
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| 335 | examples:
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| 336 | </para>
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| 337 |
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| 338 | <itemizedlist spacing="compact">
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| 339 | <listitem>
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| 340 | <para>
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| 341 | Add <command>dbus-launch</command> to the line in the
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| 342 | <filename>~/.xinitrc</filename> file that starts your graphical
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| 343 | desktop environment.
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| 344 | </para>
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| 345 | </listitem>
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| 346 | <listitem>
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| 347 | <para>
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| 348 | If you use <command>xdm</command> or some other display manager
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| 349 | that calls the <filename>~/.xsession</filename> file, you can add
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| 350 | <command>dbus-launch</command> to the line in your
|
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| 351 | <filename>~/.xsession</filename> file that starts your graphical
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| 352 | desktop environment. The syntax would be similar to the example in
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| 353 | the <filename>~/.xinitrc</filename> file.
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| 354 | </para>
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| 355 | </listitem>
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| 356 | <listitem>
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| 357 | <para>
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| 358 | The examples shown previously use
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| 359 | <command>dbus-launch</command> to specify a program to be run. This
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| 360 | has the benefit (when also using the
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| 361 | <parameter>--exit-with-session</parameter> parameter) of stopping the
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| 362 | session daemon when the specified program is stopped. You can also
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| 363 | start the session daemon in your system or personal startup scripts
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| 364 | by adding the following lines:
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| 365 | </para>
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| 366 |
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| 367 | <screen><userinput><literal># Start the D-Bus session daemon
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| 368 | eval `dbus-launch`
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| 369 | export DBUS_SESSION_BUS_ADDRESS</literal></userinput></screen>
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| 370 |
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| 371 | <para>
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| 372 | This method will not stop the session daemon when you exit
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| 373 | your shell, therefore you should add the following line to your
|
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| 374 | <filename>~/.bash_logout</filename> file:
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| 375 | </para>
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| 376 |
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| 377 | <screen><userinput><literal># Kill the D-Bus session daemon
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| 378 | kill $DBUS_SESSION_BUS_PID</literal></userinput></screen>
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| 379 | </listitem>
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| 380 |
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| 381 | <listitem>
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|---|
| 382 | <para>
|
|---|
| 383 | A hint has been written that provides ways to start scripts
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|---|
| 384 | using the KDM session manager of KDE. The concepts in this hint could
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| 385 | possibly be used with other session managers as well. The hint is
|
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| 386 | located at <ulink
|
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| 387 | url="&hints-root;/downloads/files/execute-session-scripts-using-kdm.txt"/>.
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| 388 | </para>
|
|---|
| 389 | </listitem>
|
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| 390 |
|
|---|
| 391 | </itemizedlist>
|
|---|
| 392 |
|
|---|
| 393 | </sect3>
|
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| 394 |
|
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| 395 | </sect2>
|
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| 396 |
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| 397 | <sect2 role="content">
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| 398 | <title>Contents</title>
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| 399 |
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| 400 | <segmentedlist>
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| 401 | <segtitle>Installed Programs</segtitle>
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| 402 | <segtitle>Installed Library</segtitle>
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| 403 | <segtitle>Installed Directories</segtitle>
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| 404 |
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| 405 | <seglistitem>
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| 406 | <seg>
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| 407 | dbus-cleanup-sockets, dbus-daemon, dbus-launch, dbus-monitor,
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| 408 | dbus-run-session, dbus-send and dbus-uuidgen
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| 409 | </seg>
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| 410 | <seg>
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| 411 | libdbus-1.so
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| 412 | </seg>
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| 413 | <seg>
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| 414 | /etc/dbus-1,
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| 415 | /usr/include/dbus-1.0,
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| 416 | /usr/lib/dbus-1.0,
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| 417 | /usr/share/dbus-1,
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| 418 | /usr/share/doc/dbus-&dbus-version;,
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| 419 | /var/lib/dbus and
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| 420 | /var/run/dbus
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| 421 | </seg>
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| 422 | </seglistitem>
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| 423 | </segmentedlist>
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| 424 |
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| 425 | <variablelist>
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| 426 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 427 | <?dbfo list-presentation="list"?>
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| 428 | <?dbhtml list-presentation="table"?>
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| 429 |
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| 430 | <varlistentry id="dbus-cleanup-sockets">
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| 431 | <term><command>dbus-cleanup-sockets</command></term>
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| 432 | <listitem>
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| 433 | <para>
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| 434 | is used to clean up leftover sockets in a directory.
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| 435 | </para>
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| 436 | <indexterm zone="dbus dbus-cleanup-sockets">
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| 437 | <primary sortas="b-dbus-cleanup-sockets">dbus-cleanup-sockets</primary>
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| 438 | </indexterm>
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| 439 | </listitem>
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| 440 | </varlistentry>
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| 441 |
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| 442 | <varlistentry id="dbus-daemon">
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| 443 | <term><command>dbus-daemon</command></term>
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| 444 | <listitem>
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| 445 | <para>
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| 446 | is the <application>D-Bus</application> message bus daemon.
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| 447 | </para>
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| 448 | <indexterm zone="dbus dbus-daemon">
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| 449 | <primary sortas="b-dbus-daemon">dbus-daemon</primary>
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| 450 | </indexterm>
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| 451 | </listitem>
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| 452 | </varlistentry>
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| 453 |
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| 454 | <varlistentry id="dbus-launch">
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| 455 | <term><command>dbus-launch</command></term>
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| 456 | <listitem>
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| 457 | <para>
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| 458 | is used to start <command>dbus-daemon</command> from a shell
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| 459 | script. It would normally be called from a user's login
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| 460 | scripts.
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| 461 | </para>
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| 462 | <indexterm zone="dbus dbus-launch">
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| 463 | <primary sortas="b-dbus-launch">dbus-launch</primary>
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| 464 | </indexterm>
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| 465 | </listitem>
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| 466 | </varlistentry>
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| 467 |
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| 468 | <varlistentry id="dbus-monitor">
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| 469 | <term><command>dbus-monitor</command></term>
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| 470 | <listitem>
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| 471 | <para>
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| 472 | is used to monitor messages going through a
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| 473 | <application>D-Bus</application> message bus.
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| 474 | </para>
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| 475 | <indexterm zone="dbus dbus-monitor">
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| 476 | <primary sortas="b-dbus-monitor">dbus-monitor</primary>
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| 477 | </indexterm>
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| 478 | </listitem>
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| 479 | </varlistentry>
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| 480 |
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| 481 | <varlistentry id="dbus-run-session">
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| 482 | <term><command>dbus-run-session</command></term>
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| 483 | <listitem>
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| 484 | <para>
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| 485 | start a process as a new <application>D-Bus</application> session.
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| 486 | </para>
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| 487 | <indexterm zone="dbus dbus-run-session">
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| 488 | <primary sortas="b-dbus-run-session">dbus-run-session</primary>
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| 489 | </indexterm>
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| 490 | </listitem>
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| 491 | </varlistentry>
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| 492 |
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| 493 | <varlistentry id="dbus-send">
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| 494 | <term><command>dbus-send</command></term>
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| 495 | <listitem>
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| 496 | <para>
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| 497 | is used to send a message to a <application>D-Bus</application>
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| 498 | message bus.
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| 499 | </para>
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| 500 | <indexterm zone="dbus dbus-send">
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| 501 | <primary sortas="b-dbus-send">dbus-send</primary>
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| 502 | </indexterm>
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| 503 | </listitem>
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| 504 | </varlistentry>
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| 505 |
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| 506 | <varlistentry id="dbus-uuidgen">
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| 507 | <term><command>dbus-uuidgen</command></term>
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| 508 | <listitem>
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| 509 | <para>
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| 510 | is used to generate a universally unique ID.
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| 511 | </para>
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| 512 | <indexterm zone="dbus dbus-uuidgen">
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| 513 | <primary sortas="b-dbus-uuidgen">dbus-uuidgen</primary>
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| 514 | </indexterm>
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| 515 | </listitem>
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| 516 | </varlistentry>
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| 517 |
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| 518 | <varlistentry id="libdbus-1">
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| 519 | <term><filename class="libraryfile">libdbus-1.so</filename></term>
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| 520 | <listitem>
|
|---|
| 521 | <para>
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|---|
| 522 | contains the API functions used by the
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| 523 | <application>D-Bus</application> message daemon.
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| 524 | <application>D-Bus</application> is first a library that provides
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| 525 | one-to-one communication between any two applications;
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| 526 | <command>dbus-daemon</command> is an application that uses this
|
|---|
| 527 | library to implement a message bus daemon.
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|---|
| 528 | </para>
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|---|
| 529 | <indexterm zone="dbus libdbus-1">
|
|---|
| 530 | <primary sortas="c-libdbus-1">libdbus-1.so</primary>
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|---|
| 531 | </indexterm>
|
|---|
| 532 | </listitem>
|
|---|
| 533 | </varlistentry>
|
|---|
| 534 |
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|---|
| 535 | </variablelist>
|
|---|
| 536 |
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| 537 | </sect2>
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| 538 |
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| 539 | </sect1>
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| 540 |
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