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<?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>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="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>
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