diff options
| author | Bryan Kadzban <bryan@linuxfromscratch.org> | 2013-08-16 02:53:28 +0000 |
|---|---|---|
| committer | Bryan Kadzban <bryan@linuxfromscratch.org> | 2013-08-16 02:53:28 +0000 |
| commit | 1b40540233b2d50bce2b424e0eea4ed7cfff1f4e (patch) | |
| tree | fcc78d54700d08be871830673ec757832f42331e | |
| parent | 7cb56595fc10f2cce9d2802201bcb991f0d0020d (diff) | |
Add explanatory text for new devpts mount options
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10318 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
| -rw-r--r-- | chapter01/changelog.xml | 4 | ||||
| -rw-r--r-- | chapter06/kernfs.xml | 28 |
2 files changed, 32 insertions, 0 deletions
diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml index dc163e4ad..e61395736 100644 --- a/chapter01/changelog.xml +++ b/chapter01/changelog.xml @@ -39,6 +39,10 @@ <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> </listitem> diff --git a/chapter06/kernfs.xml b/chapter06/kernfs.xml index 76bb15412..3e8d6d332 100644 --- a/chapter06/kernfs.xml +++ b/chapter06/kernfs.xml @@ -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 |