Changeset 342b176 for chapter06/chapter06.xml

Timestamp:

02/09/2004 10:45:54 PM (20 years ago)

Author:

Alex Gronenwoud <alex@…>

Branches:

10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, 6.0, 6.1, 6.1.1, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.5-systemd, 7.6, 7.6-systemd, 7.7, 7.7-systemd, 7.8, 7.8-systemd, 7.9, 7.9-systemd, 8.0, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, v5_1, v5_1_1, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

418e6cc

Parents:

c76accc

Message:

Merging configaration subsections into their corresponding sections.

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3245 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:

• chapter06/chapter06.xml (modified) (1 diff)

chapter06/chapter06.xml

@@ -61 +61 @@
 </sect1>
 
-&c6-mountproc;
+
+<sect1 id="ch-system-proc">
+<title>Mounting the proc and devpts file systems</title>
+<?dbhtml filename="proc.html" dir="chapter06"?>
+
+<para>In order for certain programs to function properly, the
+<emphasis>proc</emphasis> and <emphasis>devpts</emphasis> file systems must be
+available within the chroot environment. The proc file system is the process
+information pseudo file system through which the kernel provides information
+about the status of the system. And the devpts file system is nowadays the most
+common way pseudo terminals (PTYs) are implemented. Since kernel version 2.4, a
+file system can be mounted as many times and in as many places as you like,
+thus it's not a problem that these file systems are already mounted on your
+host system, especially so because they are virtual file systems.</para>
+
+<para>First become <emphasis>root</emphasis>, as only <emphasis>root</emphasis>
+can mount file systems in unusual places. Then check again that the LFS
+environment variable is set correctly by running <userinput>echo
+$LFS</userinput> and making sure it shows the path to your LFS partition's
+mount point, which is <filename class="directory">/mnt/lfs</filename> if you
+followed our example.</para>
+
+<para>Now make the mount points for these filesystems:</para>
+
+<screen><userinput>mkdir -p $LFS/{proc,dev/pts}</userinput></screen>
+
+<para>Mount the <emphasis>proc</emphasis> file system with:</para>
+
+<screen><userinput>mount proc $LFS/proc -t proc</userinput></screen>
+
+<para>And mount the <emphasis>devpts</emphasis> file system with:</para>
+
+<screen><userinput>mount devpts $LFS/dev/pts -t devpts</userinput></screen>
+
+<para>This last command might fail with an error like:</para>
+
+<blockquote><screen>filesystem devpts not supported by kernel</screen></blockquote>
+
+<para>The most likely cause for this is that your host system's kernel was
+compiled without support for the devpts file system. You can check which file
+systems your kernel supports by peeking into its internals with
+<command>cat /proc/filesystems</command>. If a file system type named
+<emphasis>devfs</emphasis> is listed there, then we'll be able to work around
+the problem by mounting the host's devfs file system on top of the new
+<filename>/dev</filename> structure which we'll create later on in the section
+on <xref linkend="ch-system-MAKEDEV"/>. If devfs was not listed, do not worry
+because there is yet a third way to get PTYs working inside the chroot
+environment. We'll cover this shortly in the aforementioned
+<xref linkend="ch-system-MAKEDEV"/> section.</para>
+
+<para>Remember that if for any reason you stop working on your LFS, and start
+again later, it's important to check that these file systems are mounted again
+before entering the chroot environment, otherwise problems could occur.</para>
+
+</sect1>
+
 
 <sect1 id="ch-system-chroot">