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Add explanatory text for new devpts mount options

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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10318 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
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Bryan Kadzban 2013-08-16 02:53:28 +00:00
parent 7cb56595fc
commit 1b40540233
2 changed files with 32 additions and 0 deletions
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4
chapter01/changelog.xml
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@ -38,6 +38,10 @@
<listitem>
<para>2013-08-15</para>
<itemizedlist>
<listitem>
<para>[bryan] - Add explanation for new devpts mount
options</para>
</listitem>
<listitem>
<para>[bdubbs] - Update several pages to fix regression
test failures.</para>

28
chapter06/kernfs.xml
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@ -72,6 +72,34 @@ mknod -m 666 $LFS/dev/null c 1 3</userinput></screen>
mount -vt proc proc $LFS/proc
mount -vt sysfs sysfs $LFS/sys</userinput></screen>
<variablelist>
<title>The meaning of the mount options for devpts:</title>
<varlistentry>
<term><parameter>gid=5</parameter></term>
<listitem>
<para>This ensures that all devpts-created device nodes are owned by
group ID 5. This is the ID we will use later on for the <systemitem
class="groupname">tty</systemitem> group. We use the group ID instead
of a name, since the host system might use a different ID for its
<systemitem class="groupname">tty</systemitem> group.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>mode=0620</parameter></term>
<listitem>
<para>This ensures that all devpts-created device nodes have mode 0620
(user readable and writable, group writable). Together with the
option above, this ensures that devpts will create device nodes that
meet the requirements of grantpt(), meaning the Glibc
<command>pt_chown</command> helper binary (which is not installed by
default) is not necessary.</para>
</listitem>
</varlistentry>
</variablelist>
<para>In some host systems, <filename>/dev/shm</filename> is a
symbolic link to <filename class="directory">/run/shm</filename>.
Inside a chroot environment, this temporary file system needs