| 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 "&gentoo-ftp-repo;/dbus-&dbus-version;.tar.gz">-->
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| 9 | <!ENTITY dbus-download-ftp " ">
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| 10 | <!ENTITY dbus-md5sum "c7a47b851ebe02f6726b65b78d1b730b">
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| 11 | <!ENTITY dbus-size "1.6 MB">
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| 12 | <!ENTITY dbus-buildsize "26 MB (65MB if all API docs and man pages are installed)">
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| 13 | <!ENTITY dbus-time "0.4 SBU">
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| 14 | ]>
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| 15 |
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| 16 | <sect1 id="dbus" xreflabel="D-BUS-&dbus-version;">
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| 17 | <?dbhtml filename="dbus.html"?>
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| 18 |
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| 19 | <sect1info>
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| 20 | <othername>$LastChangedBy$</othername>
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| 21 | <date>$Date$</date>
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| 22 | </sect1info>
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| 23 |
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| 24 | <title>D-BUS-&dbus-version;</title>
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| 25 |
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| 26 | <indexterm zone="dbus">
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| 27 | <primary sortas="a-D-BUS">D-BUS</primary>
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| 28 | </indexterm>
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| 29 |
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| 30 | <sect2 role="package">
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| 31 | <title>Introduction to D-BUS</title>
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| 32 |
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| 33 | <para><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).</para>
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| 42 |
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| 43 | &lfs65_checked;
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| 44 |
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| 45 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 46 | <itemizedlist spacing="compact">
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| 47 | <listitem>
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| 48 | <para>Download (HTTP): <ulink url="&dbus-download-http;"/></para>
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| 49 | </listitem>
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| 50 | <listitem>
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| 51 | <para>Download (FTP): <ulink url="&dbus-download-ftp;"/></para>
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| 52 | </listitem>
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| 53 | <listitem>
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| 54 | <para>Download MD5 sum: &dbus-md5sum;</para>
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| 55 | </listitem>
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| 56 | <listitem>
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| 57 | <para>Download size: &dbus-size;</para>
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| 58 | </listitem>
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| 59 | <listitem>
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| 60 | <para>Estimated disk space required: &dbus-buildsize;</para>
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| 61 | </listitem>
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| 62 | <listitem>
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| 63 | <para>Estimated build time: &dbus-time;</para>
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| 64 | </listitem>
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| 65 | </itemizedlist>
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| 66 |
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| 67 | <bridgehead renderas="sect3">D-BUS Dependencies</bridgehead>
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| 68 |
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| 69 | <bridgehead renderas="sect4">Required</bridgehead>
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| 70 | <para role="required"><xref linkend="expat"/> (preferred) or <!-- both
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| 71 | <xref linkend="pkgconfig"/> and --> <xref linkend="libxml2"/></para>
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| 72 |
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| 73 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 74 | <para role="optional"><xref linkend="xorg7-lib"/> and
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| 75 | <xref linkend="doxygen"/> (to generate the API documentation)</para>
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| 76 |
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| 77 | <para>Note that the <command>configure</command> script will look for
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| 78 | <ulink url="http://cyberelk.net/tim/xmlto/">xmlto</ulink> but it does
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| 79 | nothing as the XML/HTML documentation is already shipped in the source
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| 80 | tree.</para>
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| 81 |
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| 82 | <para condition="html" role="usernotes">User Notes:
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| 83 | <ulink url="&blfs-wiki;/dbus"/></para>
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| 84 |
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| 85 | </sect2>
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| 86 |
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| 87 | <sect2 role="kernel" id='dbus-kernel'>
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| 88 | <title>Kernel Configuration</title>
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| 89 |
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| 90 | <para>Ensure the following option is enabled in the kernel configuration
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| 91 | and recompile the kernel if necessary:</para>
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| 92 |
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| 93 | <screen><literal>General Setup
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| 94 | System V IPC</literal></screen>
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| 95 |
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| 96 | <indexterm zone="dbus dbus-kernel">
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| 97 | <primary sortas="d-dbus">dbus</primary>
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| 98 | </indexterm>
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| 99 |
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| 100 | </sect2>
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| 101 |
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| 102 | <sect2 role="installation">
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| 103 | <title>Installation of D-BUS</title>
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| 104 |
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| 105 | <para>As the <systemitem class="username">root</systemitem> user, create a
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| 106 | system user and group to handle the system message bus activity:</para>
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| 107 |
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| 108 | <screen role="root"><userinput>groupadd -g 18 messagebus &&
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| 109 | useradd -c "D-BUS Message Daemon User" -d /dev/null \
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| 110 | -u 18 -g messagebus -s /bin/false messagebus</userinput></screen>
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| 111 |
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| 112 | <para>This package's test suite cannot be run without passing additional
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| 113 | parameters to <command>configure</command> and exposing additional
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| 114 | functionality in the binaries. These interfaces are not intended to be
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| 115 | used in a production build of <application>D-BUS</application>, so it
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| 116 | will have to be built twice in this situation. If you would like to run
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| 117 | the unit tests, issue the following commands:</para>
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| 118 |
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| 119 | <screen><userinput>./configure --enable-tests --enable-asserts &&
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| 120 | make &&
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| 121 | make check &&
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| 122 | make distclean</userinput></screen>
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| 123 |
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| 124 | <para>Note there has been a report that the tests may fail if running
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| 125 | inside a Midnight Commander shell.</para>
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| 126 |
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| 127 | <para>Install <application>D-BUS</application> by running the following
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| 128 | commands (you may wish to review the output from
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| 129 | <command>./configure --help</command> first and add any desired parameters
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| 130 | to the <command>configure</command> command shown below):</para>
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| 131 |
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| 132 | <screen><userinput>./configure --prefix=/usr \
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| 133 | --sysconfdir=/etc \
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| 134 | --libexecdir=/usr/lib/dbus-1.0 \
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| 135 | --localstatedir=/var &&
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| 136 | make</userinput></screen>
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| 137 |
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| 138 | <!-- D-Bus 1.2.16. Doxygen _still_ broken -->
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| 139 |
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| 140 | <para>The <option>--enable-doxygen-docs</option> parameter does not work
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| 141 | properly. If you have <application>Doxygen</application> installed and you
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| 142 | wish to build the API documentation, issue
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| 143 | <command>doxygen</command>.</para>
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| 144 |
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| 145 | <para>Now, as the <systemitem class="username">root</systemitem>
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| 146 | user:</para>
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| 147 |
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| 148 | <screen role="root"><userinput>make install &&
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| 149 | install -v -m755 -d /usr/share/doc/dbus-&dbus-version; &&
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| 150 | install -v -m644 doc/{TODO,*.{dtd,html,xml,xsl,txt,c}} \
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| 151 | /usr/share/doc/dbus-&dbus-version;</userinput></screen>
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| 152 |
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| 153 | <para>If you built the API documentation, install it by issuing the
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| 154 | following commands as the <systemitem class="username">root</systemitem>
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| 155 | user:</para>
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| 156 |
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| 157 | <screen role="root"><userinput>install -v -m755 -d /usr/share/doc/dbus-&dbus-version;/api \
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| 158 | /usr/share/man/man3dbus &&
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| 159 | install -v -m644 doc/api/html/* \
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| 160 | /usr/share/doc/dbus-&dbus-version;/api &&
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| 161 | install -v -m644 doc/api/man/man3dbus/* \
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| 162 | /usr/share/man/man3dbus</userinput></screen>
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| 163 |
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| 164 | </sect2>
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| 165 |
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| 166 | <sect2 role="commands">
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| 167 | <title>Command Explanations</title>
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| 168 |
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| 169 | <para><parameter>--libexecdir=/usr/lib/dbus-1.0 </parameter>: This will
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| 170 | install binaries meant to be only used internally by
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| 171 | <application>D-BUS</application>, and the directory
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| 172 | <filename class="directory">dbus-1</filename> into
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| 173 | <filename class="directory">/usr/lib/dbus-1.0</filename> instead of
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| 174 | into <filename class="directory">/usr/libexec</filename>.</para>
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| 175 |
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| 176 | <para><parameter>--localstatedir=/var</parameter>: This parameter causes
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| 177 | the daemon PID file, system bus socket and machine uuid file to be
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| 178 | created in the <filename class="directory">/var</filename> directory
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| 179 | instead of the <filename class="directory">/usr/var</filename>
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| 180 | directory.</para>
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| 181 |
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| 182 | <para><parameter>--enable-tests</parameter>: Build extra parts of the code
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| 183 | to support testing. Configure will end with a NOTE warning about this.</para>
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| 184 |
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| 185 | <para><parameter>--enable-asserts</parameter>: Enable debugging code to run
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| 186 | assertions for statements normally assumed to be true. This prevents a
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| 187 | warning that '<parameter>--enable-tests</parameter>' on its own is only useful
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| 188 | for profiling and might not give true results for all tests, but adds its own
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| 189 | NOTE that this should not be used in a production build.
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| 190 | </para>
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| 191 |
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| 192 | <para><parameter>--disable-static</parameter>: Prevent the static libraries
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| 193 | being built and installed.</para>
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| 194 |
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| 195 | </sect2>
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| 196 |
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| 197 | <sect2 role="configuration">
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| 198 | <title>Configuring dbus</title>
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| 199 |
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| 200 | <sect3 id="dbus-config">
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| 201 | <title>Config Files</title>
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| 202 | <para><filename>/etc/dbus-1/session.conf</filename>,
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| 203 | <filename>/etc/dbus-1/system.conf</filename> and
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| 204 | <filename>/etc/dbus-1/system.d/*</filename></para>
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| 205 |
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| 206 | <indexterm zone="dbus dbus-config">
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| 207 | <primary sortas="e-etc-dbus-1-session.conf">/etc/dbus-1/session.conf</primary>
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| 208 | </indexterm>
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| 209 |
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| 210 | <indexterm zone="dbus dbus-config">
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| 211 | <primary sortas="e-etc-dbus-1/system.conf">/etc/dbus-1/system.conf</primary>
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| 212 | </indexterm>
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| 213 |
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| 214 | <indexterm zone="dbus dbus-config">
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| 215 | <primary sortas="e-etc-dbus-1-system.d-star">/etc/dbus-1/system.d/*</primary>
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| 216 | </indexterm>
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| 217 |
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| 218 | </sect3>
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| 219 |
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| 220 | <sect3 id="dbus-session-config" xreflabel="D-Bus custom services directory">
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| 221 | <title>Configuration Information</title>
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| 222 |
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| 223 | <para>The configuration files listed above should probably not be
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| 224 | modified. If changes are required, you should create
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| 225 | <filename>/etc/dbus-1/session-local.conf</filename> and/or
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| 226 | <filename>/etc/dbus-1/system-local.conf</filename> and make any
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| 227 | desired changes to these files.</para>
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| 228 |
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| 229 | <para>If any packages install a
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| 230 | <application>D-Bus</application> <filename>.service</filename>
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| 231 | file outside of the standard <filename
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| 232 | class="directory">/usr/share/dbus-1/services</filename> directory,
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| 233 | that directory should be added to the local session configuration.
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| 234 | For instance, <filename
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| 235 | class="directory">/usr/local/share/dbus-1/services</filename> can
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| 236 | be added by performing the following commands as the
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| 237 | <systemitem class="username">root</systemitem> user:</para>
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| 238 |
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| 239 | <screen role="root"><userinput>cat > /etc/dbus-1/session-local.conf << "EOF"
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| 240 | <literal><!DOCTYPE busconfig PUBLIC
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| 241 | "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
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| 242 | "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
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| 243 | <busconfig>
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| 244 |
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| 245 | <!-- Search for .service files in /usr/local -->
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| 246 | <servicedir>/usr/local/share/dbus-1/services</servicedir>
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| 247 |
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| 248 | </busconfig></literal>
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| 249 | EOF</userinput></screen>
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| 250 |
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| 251 | <!-- <para>Many packages will refuse to run if the file
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| 252 | <literal>/var/lib/dbus/machine-id</literal> does not exist, and
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| 253 | complain that <application>dbus</application> has not been properly
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| 254 | installed. To prevent this, run the following command as the
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| 255 | <systemitem class="username">root</systemitem> user:</para>
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| 256 |
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| 257 | <screen><userinput>dbus-uuidgen - -ensure</userinput></screen>
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| 258 |
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| 259 | <para>This will create a unique identifier for the machine.</para> -->
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| 260 |
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| 261 | </sect3>
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| 262 |
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| 263 | <sect3 id="dbus-init">
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| 264 | <title>Boot Script</title>
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| 265 |
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| 266 | <para>To automatically start <command>dbus-daemon</command> when the
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| 267 | system is rebooted, install the
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| 268 | <filename>/etc/rc.d/init.d/dbus</filename> bootscript from the
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| 269 | <xref linkend="bootscripts"/> package.</para>
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| 270 |
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| 271 | <indexterm zone="dbus dbus-init">
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| 272 | <primary sortas="f-dbus">dbus</primary>
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| 273 | </indexterm>
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| 274 |
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| 275 | <screen role="root"><userinput>make install-dbus</userinput></screen>
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| 276 |
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| 277 | <para>Note that this boot script only starts the system-wide
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| 278 | <application>D-BUS</application> daemon. Each user requiring access to
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| 279 | <application>D-BUS</application> services will also need to run a
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| 280 | session daemon as well. There are many methods you can use to start a
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| 281 | session daemon using the <command>dbus-launch</command> command. Review
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| 282 | the <command>dbus-launch</command> man page for details about the
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| 283 | available parameters and options. Here are some suggestions and
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| 284 | examples:</para>
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| 285 |
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| 286 | <itemizedlist spacing="compact">
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| 287 | <listitem>
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| 288 | <para>Add <command>dbus-launch</command> to the line in the
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| 289 | <filename>~/.xinitrc</filename> file that starts your graphical
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| 290 | desktop environment as shown in <xref linkend="gnome-config"/>.</para>
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| 291 | </listitem>
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| 292 | <listitem>
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| 293 | <para>If you use <command>xdm</command> or some other display manager
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| 294 | that calls the <filename>~/.xsession</filename> file, you can add
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| 295 | <command>dbus-launch</command> to the line in your
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| 296 | <filename>~/.xsession</filename> file that starts your graphical
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| 297 | desktop environment. The syntax would be similar to the example in
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| 298 | the <filename>~/.xinitrc</filename> file.</para>
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| 299 | </listitem>
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| 300 | <listitem>
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| 301 | <para>If you use <command>gdm</command> or some other display manager
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| 302 | that utilizes custom files to initiate sessions, use the example in
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| 303 | <xref linkend="gdm-config-dbus"/> of the
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| 304 | <application>GDM</application> instructions to create a file
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| 305 | containing <command>dbus-launch</command>.</para>
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| 306 | </listitem>
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| 307 | <listitem>
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| 308 | <para>The examples shown previously use
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| 309 | <command>dbus-launch</command> to specify a program to be run. This
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| 310 | has the benefit (when also using the
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| 311 | <parameter>--exit-with-session</parameter> parameter) of stopping the
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| 312 | session daemon when the specified program is stopped. You can also
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| 313 | start the session daemon in your system or personal startup scripts
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| 314 | by adding the following lines:</para>
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| 315 |
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| 316 | <screen><userinput><literal># Start the D-BUS session daemon
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| 317 | eval `dbus-launch`
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| 318 | export DBUS_SESSION_BUS_ADDRESS</literal></userinput></screen>
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| 319 |
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| 320 | <para>This method will not stop the session daemon when you exit
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| 321 | your shell, therefore you should add the following line to your
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| 322 | <filename>~/.bash_logout</filename> file:</para>
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| 323 |
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| 324 | <screen><userinput><literal># Kill the D-BUS session daemon
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| 325 | kill $DBUS_SESSION_BUS_PID</literal></userinput></screen>
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| 326 | </listitem>
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| 327 |
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| 328 | <listitem>
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| 329 | <para>A hint has been written that provides ways to start scripts
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| 330 | using the KDM session manager of KDE. The concepts in this hint could
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| 331 | possibly used with other session managers as well. The hint is
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| 332 | located at <ulink
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| 333 | url="&hints-root;/downloads/files/execute-session-scripts-using-kdm.txt"/>.
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| 334 | </para>
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| 335 | </listitem>
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| 336 |
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| 337 | </itemizedlist>
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| 338 |
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| 339 | </sect3>
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| 340 |
|
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| 341 | </sect2>
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| 342 |
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| 343 | <sect2 role="content">
|
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| 344 | <title>Contents</title>
|
|---|
| 345 |
|
|---|
| 346 | <segmentedlist>
|
|---|
| 347 | <segtitle>Installed Programs</segtitle>
|
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| 348 | <segtitle>Installed Library</segtitle>
|
|---|
| 349 | <segtitle>Installed Directories</segtitle>
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| 350 |
|
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| 351 | <seglistitem>
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| 352 | <seg>dbus-cleanup-sockets, dbus-daemon, dbus-launch, dbus-monitor,
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| 353 | dbus-send, dbus-uuidgen</seg>
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| 354 | <seg>libdbus-1.{so,a}</seg>
|
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| 355 | <seg>/etc/dbus-1, /usr/include/dbus-1.0, /usr/lib/dbus-1.0,
|
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| 356 | /usr/share/dbus-1, /usr/share/doc/dbus-&dbus-version;,
|
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| 357 | /usr/share/man/man3dbus, /var/lib/dbus and /var/run/dbus</seg>
|
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| 358 | </seglistitem>
|
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| 359 | </segmentedlist>
|
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| 360 |
|
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| 361 | <variablelist>
|
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| 362 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
|---|
| 363 | <?dbfo list-presentation="list"?>
|
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| 364 | <?dbhtml list-presentation="table"?>
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| 365 |
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| 366 | <varlistentry id="dbus-cleanup-sockets">
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| 367 | <term><command>dbus-cleanup-sockets</command></term>
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| 368 | <listitem>
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| 369 | <para>is used to clean up leftover sockets in a directory.</para>
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| 370 | <indexterm zone="dbus dbus-cleanup-sockets">
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| 371 | <primary sortas="b-dbus-cleanup-sockets">dbus-cleanup-sockets</primary>
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| 372 | </indexterm>
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| 373 | </listitem>
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| 374 | </varlistentry>
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| 375 |
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| 376 | <varlistentry id="dbus-daemon">
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| 377 | <term><command>dbus-daemon</command></term>
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| 378 | <listitem>
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| 379 | <para>is the <application>D-BUS</application> message bus
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| 380 | daemon.</para>
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| 381 | <indexterm zone="dbus dbus-daemon">
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| 382 | <primary sortas="b-dbus-daemon">dbus-daemon</primary>
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| 383 | </indexterm>
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| 384 | </listitem>
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| 385 | </varlistentry>
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| 386 |
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| 387 | <varlistentry id="dbus-launch">
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| 388 | <term><command>dbus-launch</command></term>
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| 389 | <listitem>
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| 390 | <para>is used to start <command>dbus-daemon</command> from a shell
|
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| 391 | script. It would normally be called from a user's login
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| 392 | scripts.</para>
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| 393 | <indexterm zone="dbus dbus-launch">
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| 394 | <primary sortas="b-dbus-launch">dbus-launch</primary>
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| 395 | </indexterm>
|
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| 396 | </listitem>
|
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| 397 | </varlistentry>
|
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| 398 |
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| 399 | <varlistentry id="dbus-monitor">
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| 400 | <term><command>dbus-monitor</command></term>
|
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| 401 | <listitem>
|
|---|
| 402 | <para>is used to monitor messages going through a
|
|---|
| 403 | <application>D-BUS</application> message bus.</para>
|
|---|
| 404 | <indexterm zone="dbus dbus-monitor">
|
|---|
| 405 | <primary sortas="b-dbus-monitor">dbus-monitor</primary>
|
|---|
| 406 | </indexterm>
|
|---|
| 407 | </listitem>
|
|---|
| 408 | </varlistentry>
|
|---|
| 409 |
|
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| 410 | <varlistentry id="dbus-send">
|
|---|
| 411 | <term><command>dbus-send</command></term>
|
|---|
| 412 | <listitem>
|
|---|
| 413 | <para>is used to send a message to a <application>D-BUS</application>
|
|---|
| 414 | message bus.</para>
|
|---|
| 415 | <indexterm zone="dbus dbus-send">
|
|---|
| 416 | <primary sortas="b-dbus-send">dbus-send</primary>
|
|---|
| 417 | </indexterm>
|
|---|
| 418 | </listitem>
|
|---|
| 419 | </varlistentry>
|
|---|
| 420 |
|
|---|
| 421 | <varlistentry id="dbus-uuidgen">
|
|---|
| 422 | <term><command>dbus-uuidgen</command></term>
|
|---|
| 423 | <listitem>
|
|---|
| 424 | <para>is used to generate or read a universally unique ID.</para>
|
|---|
| 425 | <indexterm zone="dbus dbus-uuidgen">
|
|---|
| 426 | <primary sortas="b-dbus-uuidgen">dbus-uuidgen</primary>
|
|---|
| 427 | </indexterm>
|
|---|
| 428 | </listitem>
|
|---|
| 429 | </varlistentry>
|
|---|
| 430 |
|
|---|
| 431 | <varlistentry id="libdbus-1">
|
|---|
| 432 | <term><filename class='libraryfile'>libdbus-1.{so,a}</filename></term>
|
|---|
| 433 | <listitem>
|
|---|
| 434 | <para>contains the API functions used by the
|
|---|
| 435 | <application>D-BUS</application> message daemon.
|
|---|
| 436 | <application>D-BUS</application> is first a library that provides
|
|---|
| 437 | one-to-one communication between any two applications;
|
|---|
| 438 | <command>dbus-daemon</command> is an application that uses this
|
|---|
| 439 | library to implement a message bus daemon.</para>
|
|---|
| 440 | <indexterm zone="dbus libdbus-1">
|
|---|
| 441 | <primary sortas="c-libdbus-1">libdbus-1.{so,a}</primary>
|
|---|
| 442 | </indexterm>
|
|---|
| 443 | </listitem>
|
|---|
| 444 | </varlistentry>
|
|---|
| 445 |
|
|---|
| 446 | </variablelist>
|
|---|
| 447 |
|
|---|
| 448 | </sect2>
|
|---|
| 449 |
|
|---|
| 450 | </sect1>
|
|---|
