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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9459 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
337 lines
11 KiB
XML
337 lines
11 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-system-sysvinit" role="wrap">
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<?dbhtml filename="sysvinit.html"?>
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<sect1info condition="script">
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<productname>sysvinit</productname>
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<productnumber>&sysvinit-version;</productnumber>
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<address>&sysvinit-url;</address>
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</sect1info>
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<title>Sysvinit-&sysvinit-version;</title>
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<indexterm zone="ch-system-sysvinit">
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<primary sortas="a-Sysvinit">Sysvinit</primary>
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</indexterm>
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<sect2 role="package">
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<title/>
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<para>The Sysvinit package contains programs for controlling the startup,
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running, and shutdown of the system.</para>
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<segmentedlist>
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<segtitle>&buildtime;</segtitle>
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<segtitle>&diskspace;</segtitle>
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<seglistitem>
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<seg>&sysvinit-ch6-sbu;</seg>
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<seg>&sysvinit-ch6-du;</seg>
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</seglistitem>
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</segmentedlist>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Sysvinit</title>
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<para>When run-levels are changed (for example, when halting the
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system), <command>init</command> sends termination signals to those
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processes that <command>init</command> itself started and that should
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not be running in the new run-level. While doing this,
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<command>init</command> outputs messages like <quote>Sending processes
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the TERM signal</quote> which seem to imply that it is sending these
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signals to all currently running processes. To avoid this
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misinterpretation, modify the source so that these messages read like
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<quote>Sending processes configured via /etc/inittab the TERM signal</quote>
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instead:</para>
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<screen><userinput remap="pre">sed -i 's@Sending processes@& configured via /etc/inittab@g' \
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src/init.c</userinput></screen>
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<para>A maintained version of the <command>wall</command> program was
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installed earlier by Util-linux. Suppress the installation of Sysvinit's
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version of this program and its man page:</para>
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<screen><userinput remap="make">sed -i -e 's/utmpdump wall/utmpdump/' \
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-e 's/mountpoint.1 wall.1/mountpoint.1/' src/Makefile</userinput></screen>
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<para>Compile the package:</para>
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<screen><userinput remap="make">make -C src</userinput></screen>
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<para>This package does not come with a test suite.</para>
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<para>Install the package:</para>
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<screen><userinput remap="install">make -C src install</userinput></screen>
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</sect2>
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<sect2 id="conf-sysvinit" role="configuration">
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<title>Configuring Sysvinit</title>
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<indexterm zone="conf-sysvinit">
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<primary sortas="a-Sysvinit">Sysvinit</primary>
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<secondary>configuring</secondary>
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</indexterm>
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<indexterm zone="conf-sysvinit">
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<primary sortas="e-/etc/inittab">/etc/inittab</primary>
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</indexterm>
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<para>Create a new file <filename>/etc/inittab</filename> by running the
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following:</para>
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<screen><userinput>cat > /etc/inittab << "EOF"
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<literal># Begin /etc/inittab
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id:3:initdefault:
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si::sysinit:/etc/rc.d/init.d/rc sysinit
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l0:0:wait:/etc/rc.d/init.d/rc 0
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l1:S1:wait:/etc/rc.d/init.d/rc 1
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l2:2:wait:/etc/rc.d/init.d/rc 2
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l3:3:wait:/etc/rc.d/init.d/rc 3
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l4:4:wait:/etc/rc.d/init.d/rc 4
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l5:5:wait:/etc/rc.d/init.d/rc 5
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l6:6:wait:/etc/rc.d/init.d/rc 6
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ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
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su:S016:once:/sbin/sulogin
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1:2345:respawn:/sbin/agetty tty1 9600
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2:2345:respawn:/sbin/agetty tty2 9600
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3:2345:respawn:/sbin/agetty tty3 9600
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4:2345:respawn:/sbin/agetty tty4 9600
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5:2345:respawn:/sbin/agetty tty5 9600
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6:2345:respawn:/sbin/agetty tty6 9600
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# End /etc/inittab</literal>
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EOF</userinput></screen>
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</sect2>
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<sect2 id="contents-sysvinit" role="content">
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<title>Contents of Sysvinit</title>
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<segmentedlist>
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<segtitle>Installed programs</segtitle>
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<seglistitem>
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<seg>bootlogd, fstab-decode, halt, init, killall5, last,
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lastb (link to last), mesg, mountpoint, pidof (link to killall5),
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poweroff (link to halt),
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reboot (link to halt), runlevel, shutdown, sulogin,
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telinit (link to init), and utmpdump</seg>
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</seglistitem>
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</segmentedlist>
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<variablelist>
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<bridgehead renderas="sect3">Short Descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
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<varlistentry id="bootlogd">
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<term><command>bootlogd</command></term>
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<listitem>
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<para>Logs boot messages to a log file</para>
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<indexterm zone="ch-system-sysvinit bootlogd">
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<primary sortas="b-bootlogd">bootlogd</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="fstab-decode">
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<term><command>fstab-decode</command></term>
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<listitem>
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<para>Run a command with fstab-encoded arguments</para>
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<indexterm zone="ch-system-sysvinit fstab-decode">
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<primary sortas="b-fstab-decode">fstab-decode</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="halt">
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<term><command>halt</command></term>
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<listitem>
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<para>Normally invokes <command>shutdown</command> with the
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<parameter>-h</parameter> option, except when already in run-level 0,
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then it tells the kernel to halt the system; it notes in the
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file <filename>/var/log/wtmp</filename> that the system is being
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brought down</para>
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<indexterm zone="ch-system-sysvinit halt">
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<primary sortas="b-halt">halt</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="init">
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<term><command>init</command></term>
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<listitem>
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<para>The first process to be started when the kernel has initialized
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the hardware which takes over the boot process and starts all the
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proceses it is instructed to</para>
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<indexterm zone="ch-system-sysvinit init">
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<primary sortas="b-init">init</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="killall5">
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<term><command>killall5</command></term>
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<listitem>
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<para>Sends a signal to all processes, except the processes in its own
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session so it will not kill the shell running the script that called
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it</para>
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<indexterm zone="ch-system-sysvinit killall5">
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<primary sortas="b-killall5">killall5</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="last">
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<term><command>last</command></term>
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<listitem>
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<para>Shows which users last logged in (and out), searching back
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through the <filename>/var/log/wtmp</filename> file; it also shows
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system boots, shutdowns, and run-level changes</para>
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<indexterm zone="ch-system-sysvinit last">
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<primary sortas="b-last">last</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="lastb">
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<term><command>lastb</command></term>
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<listitem>
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<para>Shows the failed login attempts, as logged in
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<filename>/var/log/btmp</filename></para>
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<indexterm zone="ch-system-sysvinit lastb">
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<primary sortas="b-lastb">lastb</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="mesg">
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<term><command>mesg</command></term>
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<listitem>
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<para>Controls whether other users can send messages to the current
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user's terminal</para>
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<indexterm zone="ch-system-sysvinit mesg">
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<primary sortas="b-mesg">mesg</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="mountpoint">
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<term><command>mountpoint</command></term>
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<listitem>
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<para>Checks if the directory is a mountpoint</para>
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<indexterm zone="ch-system-sysvinit mountpoint">
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<primary sortas="b-mountpoint">mountpoint</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="pidof">
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<term><command>pidof</command></term>
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<listitem>
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<para>Reports the PIDs of the given programs</para>
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<indexterm zone="ch-system-sysvinit pidof">
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<primary sortas="b-pidof">pidof</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="poweroff">
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<term><command>poweroff</command></term>
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<listitem>
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<para>Tells the kernel to halt the system and switch off the computer
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(see <command>halt</command>)</para>
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<indexterm zone="ch-system-sysvinit poweroff">
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<primary sortas="b-poweroff">poweroff</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="reboot">
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<term><command>reboot</command></term>
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<listitem>
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<para>Tells the kernel to reboot the system (see
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<command>halt</command>)</para>
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<indexterm zone="ch-system-sysvinit reboot">
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<primary sortas="b-reboot">reboot</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="runlevel">
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<term><command>runlevel</command></term>
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<listitem>
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<para>Reports the previous and the current run-level, as noted in the
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last run-level record in <filename>/var/run/utmp</filename></para>
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<indexterm zone="ch-system-sysvinit runlevel">
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<primary sortas="b-runlevel">runlevel</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="shutdown">
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<term><command>shutdown</command></term>
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<listitem>
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<para>Brings the system down in a secure way, signaling all processes
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and notifying all logged-in users</para>
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<indexterm zone="ch-system-sysvinit shutdown">
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<primary sortas="b-shutdown">shutdown</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="sulogin">
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<term><command>sulogin</command></term>
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<listitem>
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<para>Allows <systemitem class="username">root</systemitem> to log in;
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it is normally invoked by <command>init</command> when the system goes
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into single user mode</para>
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<indexterm zone="ch-system-sysvinit sulogin">
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<primary sortas="b-sulogin">sulogin</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="telinit">
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<term><command>telinit</command></term>
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<listitem>
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<para>Tells <command>init</command> which run-level to change to</para>
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<indexterm zone="ch-system-sysvinit telinit">
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<primary sortas="b-telinit">telinit</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="utmpdump">
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<term><command>utmpdump</command></term>
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<listitem>
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<para>Displays the content of the given login file in a more
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user-friendly format</para>
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<indexterm zone="ch-system-sysvinit utmpdump">
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<primary sortas="b-utmpdump">utmpdump</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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