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 |
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8 | <sect1 id="ch-system-sysvinit" role="wrap">
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9 | <?dbhtml filename="sysvinit.html"?>
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10 |
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11 | <sect1info condition="script">
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12 | <productname>sysvinit</productname>
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13 | <productnumber>&sysvinit-version;</productnumber>
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14 | <address>&sysvinit-url;</address>
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15 | </sect1info>
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16 |
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17 | <title>Sysvinit-&sysvinit-version;</title>
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18 |
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19 | <indexterm zone="ch-system-sysvinit">
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20 | <primary sortas="a-Sysvinit">Sysvinit</primary>
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21 | </indexterm>
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22 |
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23 | <sect2 role="package">
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24 | <title/>
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25 |
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26 | <para>The Sysvinit package contains programs for controlling the startup,
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27 | running, and shutdown of the system.</para>
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28 |
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29 | <segmentedlist>
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30 | <segtitle>&buildtime;</segtitle>
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31 | <segtitle>&diskspace;</segtitle>
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32 |
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33 | <seglistitem>
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34 | <seg>&sysvinit-ch6-sbu;</seg>
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35 | <seg>&sysvinit-ch6-du;</seg>
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36 | </seglistitem>
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37 | </segmentedlist>
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38 |
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39 | </sect2>
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40 |
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41 | <sect2 role="installation">
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42 | <title>Installation of Sysvinit</title>
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43 |
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44 | <para>When run-levels are changed (for example, when halting the
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45 | system), <command>init</command> sends termination signals to those
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46 | processes that <command>init</command> itself started and that should
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47 | not be running in the new run-level. While doing this,
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48 | <command>init</command> outputs messages like <quote>Sending processes
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49 | the TERM signal</quote> which seem to imply that it is sending these
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50 | signals to all currently running processes. To avoid this
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51 | misinterpretation, modify the source so that these messages read like
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52 | <quote>Sending processes configured via /etc/inittab the TERM signal</quote>
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53 | instead:</para>
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54 |
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55 | <screen><userinput remap="pre">sed -i 's@Sending processes@& configured via /etc/inittab@g' src/init.c</userinput></screen>
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56 |
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57 | <para>Maintained versions of the <command>wall</command>,
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58 | <command>mountpoint</command>, and <command>utmpdump</command> programs were
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59 | installed earlier by Util-linux. Suppress the installation of Sysvinit's
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60 | versions of these programs and their man pages:</para>
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61 |
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62 | <screen><userinput remap="make">sed -i -e '/utmpdump/d' \
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63 | -e '/mountpoint/d' src/Makefile</userinput></screen>
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64 |
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65 | <para>Compile the package:</para>
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66 |
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67 | <screen><userinput remap="make">make -C src</userinput></screen>
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68 |
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69 | <para>This package does not come with a test suite.</para>
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70 |
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71 | <para>Install the package:</para>
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72 |
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73 | <screen><userinput remap="install">make -C src install</userinput></screen>
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74 |
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75 | </sect2>
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76 |
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77 | <sect2 id="contents-sysvinit" role="content">
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78 | <title>Contents of Sysvinit</title>
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79 |
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80 | <segmentedlist>
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81 | <segtitle>Installed programs</segtitle>
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82 |
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83 | <seglistitem>
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84 | <seg>bootlogd, fstab-decode, halt, init, killall5, last,
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85 | lastb (link to last), mesg, pidof (link to killall5),
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86 | poweroff (link to halt), reboot (link to halt), runlevel, shutdown,
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87 | sulogin, and telinit (link to init)</seg>
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88 | </seglistitem>
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89 | </segmentedlist>
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90 |
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91 | <variablelist>
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92 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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93 | <?dbfo list-presentation="list"?>
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94 | <?dbhtml list-presentation="table"?>
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95 |
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96 | <varlistentry id="bootlogd">
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97 | <term><command>bootlogd</command></term>
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98 | <listitem>
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99 | <para>Logs boot messages to a log file</para>
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100 | <indexterm zone="ch-system-sysvinit bootlogd">
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101 | <primary sortas="b-bootlogd">bootlogd</primary>
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102 | </indexterm>
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103 | </listitem>
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104 | </varlistentry>
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105 |
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106 | <varlistentry id="fstab-decode">
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107 | <term><command>fstab-decode</command></term>
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108 | <listitem>
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109 | <para>Run a command with fstab-encoded arguments</para>
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110 | <indexterm zone="ch-system-sysvinit fstab-decode">
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111 | <primary sortas="b-fstab-decode">fstab-decode</primary>
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112 | </indexterm>
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113 | </listitem>
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114 | </varlistentry>
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115 |
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116 | <varlistentry id="halt">
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117 | <term><command>halt</command></term>
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118 | <listitem>
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119 | <para>Normally invokes <command>shutdown</command> with the
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120 | <parameter>-h</parameter> option, except when already in run-level 0,
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121 | then it tells the kernel to halt the system; it notes in the
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122 | file <filename>/var/log/wtmp</filename> that the system is being
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123 | brought down</para>
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124 | <indexterm zone="ch-system-sysvinit halt">
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125 | <primary sortas="b-halt">halt</primary>
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126 | </indexterm>
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127 | </listitem>
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128 | </varlistentry>
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129 |
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130 | <varlistentry id="init">
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131 | <term><command>init</command></term>
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132 | <listitem>
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133 | <para>The first process to be started when the kernel has initialized
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134 | the hardware which takes over the boot process and starts all the
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135 | proceses it is instructed to</para>
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136 | <indexterm zone="ch-system-sysvinit init">
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137 | <primary sortas="b-init">init</primary>
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138 | </indexterm>
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139 | </listitem>
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140 | </varlistentry>
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141 |
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142 | <varlistentry id="killall5">
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143 | <term><command>killall5</command></term>
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144 | <listitem>
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145 | <para>Sends a signal to all processes, except the processes in its own
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146 | session so it will not kill the shell running the script that called
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147 | it</para>
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148 | <indexterm zone="ch-system-sysvinit killall5">
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149 | <primary sortas="b-killall5">killall5</primary>
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150 | </indexterm>
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151 | </listitem>
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152 | </varlistentry>
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153 |
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154 | <varlistentry id="last">
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155 | <term><command>last</command></term>
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156 | <listitem>
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157 | <para>Shows which users last logged in (and out), searching back
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158 | through the <filename>/var/log/wtmp</filename> file; it also shows
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159 | system boots, shutdowns, and run-level changes</para>
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160 | <indexterm zone="ch-system-sysvinit last">
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161 | <primary sortas="b-last">last</primary>
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162 | </indexterm>
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163 | </listitem>
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164 | </varlistentry>
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165 |
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166 | <varlistentry id="lastb">
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167 | <term><command>lastb</command></term>
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168 | <listitem>
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169 | <para>Shows the failed login attempts, as logged in
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170 | <filename>/var/log/btmp</filename></para>
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171 | <indexterm zone="ch-system-sysvinit lastb">
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172 | <primary sortas="b-lastb">lastb</primary>
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173 | </indexterm>
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174 | </listitem>
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175 | </varlistentry>
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176 |
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177 | <varlistentry id="mesg">
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178 | <term><command>mesg</command></term>
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179 | <listitem>
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180 | <para>Controls whether other users can send messages to the current
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181 | user's terminal</para>
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182 | <indexterm zone="ch-system-sysvinit mesg">
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183 | <primary sortas="b-mesg">mesg</primary>
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184 | </indexterm>
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185 | </listitem>
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186 | </varlistentry>
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187 |
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188 | <varlistentry id="pidof">
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189 | <term><command>pidof</command></term>
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190 | <listitem>
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191 | <para>Reports the PIDs of the given programs</para>
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192 | <indexterm zone="ch-system-sysvinit pidof">
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193 | <primary sortas="b-pidof">pidof</primary>
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194 | </indexterm>
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195 | </listitem>
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196 | </varlistentry>
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197 |
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198 | <varlistentry id="poweroff">
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199 | <term><command>poweroff</command></term>
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200 | <listitem>
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201 | <para>Tells the kernel to halt the system and switch off the computer
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202 | (see <command>halt</command>)</para>
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203 | <indexterm zone="ch-system-sysvinit poweroff">
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204 | <primary sortas="b-poweroff">poweroff</primary>
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205 | </indexterm>
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206 | </listitem>
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207 | </varlistentry>
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208 |
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209 | <varlistentry id="reboot">
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210 | <term><command>reboot</command></term>
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211 | <listitem>
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212 | <para>Tells the kernel to reboot the system (see
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213 | <command>halt</command>)</para>
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214 | <indexterm zone="ch-system-sysvinit reboot">
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215 | <primary sortas="b-reboot">reboot</primary>
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216 | </indexterm>
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217 | </listitem>
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218 | </varlistentry>
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219 |
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220 | <varlistentry id="runlevel">
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221 | <term><command>runlevel</command></term>
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222 | <listitem>
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223 | <para>Reports the previous and the current run-level, as noted in the
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224 | last run-level record in <filename>/var/run/utmp</filename></para>
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225 | <indexterm zone="ch-system-sysvinit runlevel">
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226 | <primary sortas="b-runlevel">runlevel</primary>
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227 | </indexterm>
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228 | </listitem>
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229 | </varlistentry>
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230 |
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231 | <varlistentry id="shutdown">
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232 | <term><command>shutdown</command></term>
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233 | <listitem>
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234 | <para>Brings the system down in a secure way, signaling all processes
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235 | and notifying all logged-in users</para>
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236 | <indexterm zone="ch-system-sysvinit shutdown">
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237 | <primary sortas="b-shutdown">shutdown</primary>
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238 | </indexterm>
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239 | </listitem>
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240 | </varlistentry>
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241 |
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242 | <varlistentry id="sulogin">
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243 | <term><command>sulogin</command></term>
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244 | <listitem>
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245 | <para>Allows <systemitem class="username">root</systemitem> to log in;
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246 | it is normally invoked by <command>init</command> when the system goes
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247 | into single user mode</para>
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248 | <indexterm zone="ch-system-sysvinit sulogin">
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249 | <primary sortas="b-sulogin">sulogin</primary>
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250 | </indexterm>
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251 | </listitem>
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252 | </varlistentry>
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253 |
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254 | <varlistentry id="telinit">
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255 | <term><command>telinit</command></term>
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256 | <listitem>
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257 | <para>Tells <command>init</command> which run-level to change to</para>
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258 | <indexterm zone="ch-system-sysvinit telinit">
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259 | <primary sortas="b-telinit">telinit</primary>
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260 | </indexterm>
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261 | </listitem>
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262 | </varlistentry>
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263 |
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264 | </variablelist>
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265 |
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266 | </sect2>
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267 |
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268 | </sect1>
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