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diff --git a/chapter06/sysvinit.xml b/chapter06/sysvinit.xml new file mode 100644 index 000000000..ab9dad5bd --- /dev/null +++ b/chapter06/sysvinit.xml @@ -0,0 +1,322 @@ +<?xml version="1.0" encoding="ISO-8859-1"?> +<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" + "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [ + <!ENTITY % general-entities SYSTEM "../general.ent"> + %general-entities; +]> + +<sect1 id="ch-system-sysvinit" role="wrap"> + <?dbhtml filename="sysvinit.html"?> + + <title>Sysvinit-&sysvinit-version;</title> + + <indexterm zone="ch-system-sysvinit"> + <primary sortas="a-Sysvinit">Sysvinit</primary> + </indexterm> + + <sect2 role="package"> + <title/> + + <para>The Sysvinit package contains programs for controlling the startup, + running, and shutdown of the system.</para> + + <segmentedlist> + <segtitle>&buildtime;</segtitle> + <segtitle>&diskspace;</segtitle> + + <seglistitem> + <seg>&sysvinit-ch6-sbu;</seg> + <seg>&sysvinit-ch6-du;</seg> + </seglistitem> + </segmentedlist> + + </sect2> + + <sect2 role="installation"> + <title>Installation of Sysvinit</title> + + <para>When run-levels are changed (for example, when halting the + system), <command>init</command> sends termination signals to those + processes that <command>init</command> itself started and that should + not be running in the new run-level. While doing this, + <command>init</command> outputs messages like <quote>Sending processes + the TERM signal</quote> which seem to imply that it is sending these + signals to all currently running processes. To avoid this + misinterpretation, modify the source so that these messages read like + <quote>Sending processes started by init the TERM signal</quote> + instead:</para> + +<screen><userinput>sed -i 's@Sending processes@& started by init@g' \ + src/init.c</userinput></screen> + + <para>Compile the package:</para> + +<screen><userinput>make -C src</userinput></screen> + + <para>This package does not come with a test suite.</para> + + <para>Install the package:</para> + +<screen><userinput>make -C src install</userinput></screen> + + </sect2> + + <sect2 id="conf-sysvinit" role="configuration"> + <title>Configuring Sysvinit</title> + + <indexterm zone="conf-sysvinit"> + <primary sortas="a-Sysvinit">Sysvinit</primary> + <secondary>configuring</secondary> + </indexterm> + + <indexterm zone="conf-sysvinit"> + <primary sortas="e-/etc/inittab">/etc/inittab</primary> + </indexterm> + + <para>Create a new file <filename>/etc/inittab</filename> by running the + following:</para> + +<screen><userinput>cat > /etc/inittab << "EOF" +<literal># Begin /etc/inittab + +id:3:initdefault: + +si::sysinit:/etc/rc.d/init.d/rc sysinit + +l0:0:wait:/etc/rc.d/init.d/rc 0 +l1:S1:wait:/etc/rc.d/init.d/rc 1 +l2:2:wait:/etc/rc.d/init.d/rc 2 +l3:3:wait:/etc/rc.d/init.d/rc 3 +l4:4:wait:/etc/rc.d/init.d/rc 4 +l5:5:wait:/etc/rc.d/init.d/rc 5 +l6:6:wait:/etc/rc.d/init.d/rc 6 + +ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now + +su:S016:once:/sbin/sulogin + +1:2345:respawn:/sbin/agetty tty1 9600 +2:2345:respawn:/sbin/agetty tty2 9600 +3:2345:respawn:/sbin/agetty tty3 9600 +4:2345:respawn:/sbin/agetty tty4 9600 +5:2345:respawn:/sbin/agetty tty5 9600 +6:2345:respawn:/sbin/agetty tty6 9600 + +# End /etc/inittab</literal> +EOF</userinput></screen> + + </sect2> + + <sect2 id="contents-sysvinit" role="content"> + <title>Contents of Sysvinit</title> + + <segmentedlist> + <segtitle>Installed programs</segtitle> + + <seglistitem> + <seg>bootlogd, halt, init, killall5, last, lastb (link to last), mesg, + mountpoint, pidof (link to killall5), poweroff (link to halt), + reboot (link to halt), runlevel, shutdown, sulogin, + telinit (link to init), utmpdump, and wall</seg> + </seglistitem> + </segmentedlist> + + <variablelist> + <bridgehead renderas="sect3">Short Descriptions</bridgehead> + <?dbfo list-presentation="list"?> + <?dbhtml list-presentation="table"?> + + <varlistentry id="bootlogd"> + <term><command>bootlogd</command></term> + <listitem> + <para>Logs boot messages to a log file</para> + <indexterm zone="ch-system-sysvinit bootlogd"> + <primary sortas="b-bootlogd">bootlogd</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="halt"> + <term><command>halt</command></term> + <listitem> + <para>Normally invokes <command>shutdown</command> with the + <parameter>-h</parameter> option, except when already in run-level 0, + then it tells the kernel to halt the system; it notes in the + file <filename>/var/log/wtmp</filename> that the system is being + brought down</para> + <indexterm zone="ch-system-sysvinit halt"> + <primary sortas="b-halt">halt</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="init"> + <term><command>init</command></term> + <listitem> + <para>The first process to be started when the kernel has initialized + the hardware which takes over the boot process and starts all the + proceses it is instructed to</para> + <indexterm zone="ch-system-sysvinit init"> + <primary sortas="b-init">init</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="killall5"> + <term><command>killall5</command></term> + <listitem> + <para>Sends a signal to all processes, except the processes in its own + session so it will not kill the shell running the script that called + it</para> + <indexterm zone="ch-system-sysvinit killall5"> + <primary sortas="b-killall5">killall5</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="last"> + <term><command>last</command></term> + <listitem> + <para>Shows which users last logged in (and out), searching back + through the <filename>/var/log/wtmp</filename> file; it also shows + system boots, shutdowns, and run-level changes</para> + <indexterm zone="ch-system-sysvinit last"> + <primary sortas="b-last">last</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="lastb"> + <term><command>lastb</command></term> + <listitem> + <para>Shows the failed login attempts, as logged in + <filename>/var/log/btmp</filename></para> + <indexterm zone="ch-system-sysvinit lastb"> + <primary sortas="b-lastb">lastb</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="mesg"> + <term><command>mesg</command></term> + <listitem> + <para>Controls whether other users can send messages to the current + user's terminal</para> + <indexterm zone="ch-system-sysvinit mesg"> + <primary sortas="b-mesg">mesg</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="mountpoint"> + <term><command>mountpoint</command></term> + <listitem> + <para>Checks if the directory is a mountpoint</para> + <indexterm zone="ch-system-sysvinit mountpoint"> + <primary sortas="b-mountpoint">mountpoint</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="pidof"> + <term><command>pidof</command></term> + <listitem> + <para>Reports the PIDs of the given programs</para> + <indexterm zone="ch-system-sysvinit pidof"> + <primary sortas="b-pidof">pidof</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="poweroff"> + <term><command>poweroff</command></term> + <listitem> + <para>Tells the kernel to halt the system and switch off the computer + (see <command>halt</command>)</para> + <indexterm zone="ch-system-sysvinit poweroff"> + <primary sortas="b-poweroff">poweroff</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="reboot"> + <term><command>reboot</command></term> + <listitem> + <para>Tells the kernel to reboot the system (see + <command>halt</command>)</para> + <indexterm zone="ch-system-sysvinit reboot"> + <primary sortas="b-reboot">reboot</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="runlevel"> + <term><command>runlevel</command></term> + <listitem> + <para>Reports the previous and the current run-level, as noted in the + last run-level record in <filename>/var/run/utmp</filename></para> + <indexterm zone="ch-system-sysvinit runlevel"> + <primary sortas="b-runlevel">runlevel</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="shutdown"> + <term><command>shutdown</command></term> + <listitem> + <para>Brings the system down in a secure way, signaling all processes + and notifying all logged-in users</para> + <indexterm zone="ch-system-sysvinit shutdown"> + <primary sortas="b-shutdown">shutdown</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="sulogin"> + <term><command>sulogin</command></term> + <listitem> + <para>Allows <systemitem class="username">root</systemitem> to log in; + it is normally invoked by <command>init</command> when the system goes + into single user mode</para> + <indexterm zone="ch-system-sysvinit sulogin"> + <primary sortas="b-sulogin">sulogin</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="telinit"> + <term><command>telinit</command></term> + <listitem> + <para>Tells <command>init</command> which run-level to change to</para> + <indexterm zone="ch-system-sysvinit telinit"> + <primary sortas="b-telinit">telinit</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="utmpdump"> + <term><command>utmpdump</command></term> + <listitem> + <para>Displays the content of the given login file in a more + user-friendly format</para> + <indexterm zone="ch-system-sysvinit utmpdump"> + <primary sortas="b-utmpdump">utmpdump</primary> + </indexterm> + </listitem> + </varlistentry> + + <varlistentry id="wall"> + <term><command>wall</command></term> + <listitem> + <para>Writes a message to all logged-in users</para> + <indexterm zone="ch-system-sysvinit wall"> + <primary sortas="b-wall">wall</primary> + </indexterm> + </listitem> + </varlistentry> + + </variablelist> + + </sect2> + +</sect1> |