From 0cda8984a835f37a573c0e2eb31676ff52773d16 Mon Sep 17 00:00:00 2001
From: Bruce Dubbs <bdubbs@linuxfromscratch.org>
Date: Tue, 2 Aug 2011 02:15:42 +0000
Subject: Rewrite bootscripts and Chaper 7

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9574 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
---
 chapter07/usage.xml | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 77 insertions(+), 2 deletions(-)

(limited to 'chapter07/usage.xml')

diff --git a/chapter07/usage.xml b/chapter07/usage.xml
index 334c471b7..a679381c5 100644
--- a/chapter07/usage.xml
+++ b/chapter07/usage.xml
@@ -37,7 +37,80 @@
 5: same as 4, it is usually used for GUI login (like X's <command>xdm</command> or KDE's <command>kdm</command>)
 6: reboot the computer</literallayout>
 
-  <para>The command used to change run-levels is <command>init
+  <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>During the kernel initialization, the first program that is run
+  is either specified on the command line or, by default 
+  <command>init</command>.  This program reads the initialization file
+  <filename>/etc/inittab</filename>.  Create this file with:</para>
+
+<screen><userinput>cat &gt; /etc/inittab &lt;&lt; "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>
+
+  <para>An explanation of this initialization file is in the man page for
+  <emphasis>inittab</emphasis>.  For LFS, the key command that is run is
+  <command>rc</command>. The intialization file above will instruct
+  <command>rc</command> to run all the scripts starting with an S in the
+  <filename class="directory">/etc/rc.d/rcsysinit.d</filename> directory
+  followed by all the scripts starting with an S in the <filename
+  class="directory">/etc/rc.d/rc?.d</filename> directory where the question
+  mark is specified by the initdefault value.</para>
+
+  <para>As a convenience, the <command>rc</command> script reads a library of
+  functions in <filename class="directory">/lib/boot/functions</filename>.
+  This library also reads an optional configuration file,
+  <filename>/etc/sysconfig/init_params</filename>.  Any of the system
+  configuration file parameters described in subsequent sections can be
+  alternatively placed in this file allowing consolidation of all system
+  parameters in thsi one file.</para>
+
+  <para>As a debugging convenience, the functions script also logs all output
+  to <filename>/run/var/bootlog</filename>.  Since the <filename
+  class="directory">/run</filename> directory is a tmpfs, this file is not
+  persistent across boots.</para>
+
+  </sect2>
+
+  <sect2 id="init-levels" >
+  <title>Changing Run Levels</title>
+
+  <para>Changing run-levels is done with <command>init
   <replaceable>&lt;runlevel&gt;</replaceable></command>, where
   <replaceable>&lt;runlevel&gt;</replaceable> is the target run-level. For example, to
   reboot the computer, a user could issue the <command>init 6</command> command,
@@ -59,7 +132,7 @@
 
   <para>The real scripts are in <filename
   class="directory">/etc/rc.d/init.d</filename>. They do the actual work, and
-  the symlinks all point to them. Killing links and starting links point to
+  the symlinks all point to them. K links and S links point to
   the same script in <filename class="directory">/etc/rc.d/init.d</filename>.
   This is because the scripts can be called with different parameters like
   <parameter>start</parameter>, <parameter>stop</parameter>,
@@ -126,4 +199,6 @@
   it is your own LFS system). The files given here are an example of how
   it can be done.</para>
 
+  </sect2>
+
 </sect1>
-- 
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