Author: jim
Date: 2006-05-29 05:58:52 -0600 (Mon, 29 May 2006)
New Revision: 1676
Modified:
/
trunk/BOOK/chroot/common/devices.xml
trunk/BOOK/chroot/common/kernfs.xml
Log:
[EMAIL PROTECTED] (orig r1724): jeremy | 2006-05-29 02:45:38 -0700
Mount --bind host /dev to LFS's dev on chroot builds - fixes ticket #27
Property changes on:
___________________________________________________________________
Name: svk:merge
- b6734a72-470d-0410-b049-f317dca95413:/:1723
+ b6734a72-470d-0410-b049-f317dca95413:/:1724
Modified: trunk/BOOK/chroot/common/devices.xml
===================================================================
--- trunk/BOOK/chroot/common/devices.xml 2006-05-29 11:58:42 UTC (rev
1675)
+++ trunk/BOOK/chroot/common/devices.xml 2006-05-29 11:58:52 UTC (rev
1676)
@@ -8,69 +8,16 @@
<sect1 id="ch-chroot-devices">
<?dbhtml filename="devices.html"?>
- <title>Populating /dev</title>
+ <title>Mounting Kernel Filesystems</title>
<indexterm zone="ch-chroot-devices">
<primary sortas="e-/dev/*">/dev/*</primary>
</indexterm>
<sect2>
- <title>Creating Initial Device Nodes</title>
+ <title>Mounting Additional Kernel Filesystems</title>
- <xi:include xmlns:xi="http://www.w3.org/2003/XInclude";
- href="../../boot/common/devices.xml"
- xpointer="xpointer(//[EMAIL PROTECTED]'b'])"/>
-
-<screen><userinput>mknod -m 600 /dev/console c 5 1
-mknod -m 666 /dev/null c 1 3</userinput></screen>
-
- </sect2>
-
- <sect2>
- <title>Mounting tmpfs and Populating /dev</title>
-
- <para>The recommended method of populating the <filename
- class="directory">/dev</filename> directory with devices is to
- mount a virtual filesystem (such as <systemitem
- class="filesystem">tmpfs</systemitem>) on the <filename
- class="directory">/dev</filename> directory, and allow the devices
- to be created dynamically on that virtual filesystem as they are
- detected or accessed. This is generally done during the boot process.
- Since this new system has not been booted, it is necessary to do what
- the LFS-Bootscripts package would otherwise do by mounting <filename
- class="directory">/dev</filename>:</para>
-
-<screen><userinput>mount -n -vt tmpfs none /dev</userinput></screen>
-
- <para>The Udev package is what actually creates the devices in the
- <filename class="directory">/dev</filename> directory. Since it will
- not be installed until later on in the process, manually create the
- minimal set of device nodes needed to complete the building of this
- system:</para>
-
-<screen><userinput>mknod -m 622 /dev/console c 5 1
-mknod -m 666 /dev/null c 1 3
-mknod -m 666 /dev/zero c 1 5
-mknod -m 666 /dev/ptmx c 5 2
-mknod -m 666 /dev/tty c 5 0
-mknod -m 444 /dev/random c 1 8
-mknod -m 444 /dev/urandom c 1 9
-chown -v root:tty /dev/{console,ptmx,tty}</userinput></screen>
-
- <para>There are some symlinks and directories required by LFS that
- are created during system startup by the LFS-Bootscripts package. Since
- this is a chroot environment and not a booted environment, those symlinks
- and directories need to be created here:</para>
-
-<screen><userinput>ln -sv /proc/self/fd /dev/fd
-ln -sv /proc/self/fd/0 /dev/stdin
-ln -sv /proc/self/fd/1 /dev/stdout
-ln -sv /proc/self/fd/2 /dev/stderr
-ln -sv /proc/kcore /dev/core
-mkdir -v /dev/pts
-mkdir -v /dev/shm</userinput></screen>
-
- <para>Finally, mount the proper virtual (kernel) file systems on the
+ <para>Mount the proper virtual (kernel) file systems on the
newly-created directories:</para>
<screen><userinput>mount -vt devpts -o gid=4,mode=620 none /dev/pts
Modified: trunk/BOOK/chroot/common/kernfs.xml
===================================================================
--- trunk/BOOK/chroot/common/kernfs.xml 2006-05-29 11:58:42 UTC (rev 1675)
+++ trunk/BOOK/chroot/common/kernfs.xml 2006-05-29 11:58:52 UTC (rev 1676)
@@ -33,12 +33,27 @@
and start again later, it is important to check that these file systems
are mounted again before entering the chroot environment.</para>
- <para>Additional file systems will soon be mounted from within the
- chroot environment. To keep the host up to date, perform a <quote>fake
- mount</quote> for each of these now:</para>
+ <para>Two device nodes, /dev/console and /dev/null, are required to be
+ present on the filesystem. These are needed by the kernel even before
+ starting Udev early in the boot process, so we create them here:</para>
-<screen><userinput>mount -f -vt tmpfs tmpfs $LFS/dev
-mount -f -vt tmpfs tmpfs $LFS/dev/shm
+<screen><userinput>mknod -m 600 $LFS/dev/console c 5 1
+mknod -m 666 $LFS/dev/null c 1 3</userinput></screen>
+
+ <para>Once the system is complete and booting, the rest of our device
+ nodes are created by the Udev package. Since this package is not
+ available to us right now, we must take other steps to provide device
+ nodes under on the LFS filesystem. We will use the <quote>bind</quote>
+ option in the mount command to make our host system's /dev structure
+ appear in the new LFS filesystem:</para>
+
+<screen><userinput>/tools/bin/mount -o bind /dev $LFS/dev</userinput></screen>
+
+ <para>Additional file systems will soon be mounted from within the chroot
+ environment. To keep the host up to date, perform a <quote>fake mount</quote>
+ for each of these now:</para>
+
+<screen><userinput>mount -f -vt tmpfs tmpfs $LFS/dev/shm
mount -f -vt devpts -o gid=10,mode=620 devpts $LFS/dev/pts</userinput></screen>
</sect1>
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