1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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4 | %general-entities;
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5 | ]>
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6 | <sect1 id="ch-system-hotplug" xreflabel="Hotplug" role="wrap">
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7 | <title>Hotplug-&hotplug-version;</title>
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8 | <?dbhtml filename="hotplug.html"?>
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9 |
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10 | <indexterm zone="ch-system-hotplug"><primary sortas="a-Hotplug">Hotplug</primary></indexterm>
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11 |
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12 | <sect2 role="package"><title/>
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13 |
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14 | <para>The Hotplug package contains scripts that react upon various changes
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15 | in the kernel state, in particular, addition and removal of hardware. This
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16 | package also detects existing hardware during boot and inserts the relevant
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17 | modules into the running kernel.
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18 | </para>
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19 | <segmentedlist>
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20 | <segtitle>&buildtime;</segtitle>
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21 | <segtitle>&diskspace;</segtitle>
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22 | <seglistitem><seg>0.01 SBU</seg><seg>0.1 MB</seg></seglistitem>
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23 | </segmentedlist>
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24 |
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25 | </sect2>
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26 |
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27 | <sect2 role="installation">
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28 | <title>Installation of Hotplug</title>
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29 |
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30 | <para>
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31 | Apply the patch that avoids bogus dependencies of the
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32 | <filename>usb.rc</filename> script
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33 | upon <application>which</application> and
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34 | <application>usbutils</application> packages:
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35 | </para>
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36 |
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37 | <screen><userinput>patch -Np1 -i ../hotplug-&hotplug-version;-bogus-deps-1.patch</userinput></screen>
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38 |
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39 | <para>
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40 | USB coldplugging is somewhat broken in Hotplug by default. Fix this with the
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41 | following patch:
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42 | </para>
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43 |
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44 | <screen><userinput>patch -Np1 -i ../hotplug-&hotplug-version;-device-2.patch</userinput></screen>
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45 |
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46 | <para>
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47 | At last, there is an optional patch that adds ISAPNP hardware detection
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48 | capabilities to hotplug. It is not well tested. If you chose to apply it,
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49 | run the following command:
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50 | </para>
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51 |
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52 | <screen><userinput>patch -Np1 -i ../hotplug-&hotplug-version;-isapnp-2.patch</userinput></screen>
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53 |
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54 |
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55 | <para>And finally install the hotplug package:</para>
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56 |
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57 | <screen><userinput>make install</userinput></screen>
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58 |
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59 | <para>Remove hotplug's not-so-clean init script, since we're going to be using
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60 | the script including with LFS-Bootscripts:</para>
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61 |
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62 | <screen><userinput>rm -rf /etc/init.d</userinput></screen>
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63 |
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64 | <para>
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65 | If you have applied the ISAPNP patch, add some required entries to
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66 | <filename>/etc/modprobe.conf</filename>:</para>
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67 |
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68 | <screen><userinput>cat >>/etc/modprobe.conf <<"EOF"</userinput>
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69 | # Begin /etc/modprobe.conf entries for ISAPNP hardware detection script
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70 | # by Marco d'Itri
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71 | alias pnp:dPNP0511 irtty-sir
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72 | alias pnp:dPNP0700 floppy
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73 | alias pnp:dPNP0800 pcspkr
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74 | alias pnp:dPNP0B00 rtc
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75 | alias pnp:dPNP0303 atkbd
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76 | alias pnp:dPNP0F13 psmouse
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77 | alias pnp:dPNPB02F analog
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78 | # End /etc/modprobe.conf entries for ISAPNP hardware detection script
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79 | <userinput>EOF</userinput></screen>
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80 |
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81 | <para>These entries may become unneded for newer versions of Linux kernel,
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82 | since Marco d'Itri will try to convince developers to put them into the
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83 | corresponding modules themselves.</para>
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84 |
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85 | </sect2>
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86 |
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87 |
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88 | <sect2 id="contents-hotplug" role="content"><title>Contents of Hotplug</title>
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89 |
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90 | <variablelist>
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91 | <varlistentry id="hotplug">
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92 | <term><command>/sbin/hotplug</command></term>
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93 | <listitem>
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94 | <indexterm zone="ch-system-hotplug hotplug"><primary
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95 | sortas="b-hotplug">hotplug</primary></indexterm>
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96 | <para>This script is called by default by Linux kernel when something
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97 | changes in its internal state (e.g. a new device is added or removed).</para>
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98 | </listitem>
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99 | </varlistentry>
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100 |
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101 | <varlistentry id="hotplug-rc">
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102 | <term><command>*.rc</command> files in
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103 | <filename class="directory">/etc/hotplug</filename> directory</term>
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104 | <listitem>
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105 | <para>These scripts are used for cold plugging, i.e. detection and other
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106 | specific actions upon hardware already present during system startup.
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107 | They are called by the <filename>hotplug</filename> initscript that comes
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108 | from the lfs-bootscripts package.
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109 | The <command>*.rc</command>
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110 | scripts try to find kernel modules corresponding to your hardware and insert
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111 | them into the running kernel.
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112 | </para>
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113 | </listitem>
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114 | </varlistentry>
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115 |
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116 | <varlistentry id="hotplug-agent">
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117 | <term><command>*.agent</command> files in
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118 | <filename class="directory">/etc/hotplug</filename> directory</term>
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119 | <listitem>
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120 | <para>These scripts are called by <command>/sbin/hotplug</command>
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121 | in response to different types of hotplug events generated by the kernel.
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122 | Their action is to insert corresponding kernel modules and call user-provided
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123 | scripts, if any.
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124 | </para>
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125 | </listitem>
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126 | </varlistentry>
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127 |
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128 | <varlistentry id="hotplug-functions">
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129 | <term><filename>/etc/hotplug/hotplug.functions</filename></term>
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130 | <listitem>
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131 | <para>This file contains common functions used by other scripts in hotplug
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132 | package.
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133 | </para>
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134 | </listitem>
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135 | </varlistentry>
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136 |
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137 | <varlistentry id="hotplug-blacklist">
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138 | <term><filename>/etc/hotplug/blacklist</filename></term>
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139 | <listitem>
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140 | <indexterm zone="ch-system-hotplug hotplug-blacklist"><primary
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141 | sortas="e-/etc/hotplug/blacklist">/etc/hotplug/blacklist</primary></indexterm>
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142 | <para>This file contains the list of modules that should never be
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143 | inserted into the kernel by hotplug scripts.
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144 | </para>
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145 | </listitem>
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146 | </varlistentry>
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147 |
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148 | <varlistentry id="hotplug-subdirs">
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149 | <term><filename class="directory">/etc/hotplug/{pci,usb}</filename></term>
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150 | <listitem>
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151 | <para>These directories are supposed to contain user-written handlers for
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152 | hotplug events.
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153 | </para>
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154 | </listitem>
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155 | </varlistentry>
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156 |
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157 | <varlistentry id="hotplug-usb.usermap">
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158 | <term><filename>/etc/hotplug/usb.usermap</filename></term>
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159 | <listitem>
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160 | <indexterm zone="ch-system-hotplug hotplug-usb.usermap"><primary
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161 | sortas="e-/etc/hotplug/usb.usermap">/etc/hotplug/usb.usermap</primary></indexterm>
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162 | <para>This file contains rules that determine which user-defined handlers to
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163 | call for each USB device, based on its vendor, id and other attributes.
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164 | </para>
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165 | </listitem>
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166 | </varlistentry>
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167 |
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168 | <varlistentry id="hotplug-hotplug.d">
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169 | <term><filename class="directory">/etc/hotplug.d</filename></term>
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170 | <listitem>
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171 | <para>This directory contains programs (or symlinks to them)
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172 | that are interested in receiving all hotplug events. E.g.,
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173 | <application>udev</application> puts its symlink here during installation.
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174 | </para>
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175 | </listitem>
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176 | </varlistentry>
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177 | </variablelist>
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178 | </sect2>
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179 | </sect1>
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