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ref-manual: Added DISK_SIGNATURE variable description to glossary. 

Fixes [YOCTO #6125]

(From yocto-docs rev: 5ee5433cc7799a240dd18aa20ce44b3ae978b592)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Scott Rifenbark 2014-04-08 09:01:45 -07:00 committed by Richard Purdie
parent 9680453798
commit ae64c92afc
1 changed files with 34 additions and 0 deletions
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34
documentation/ref-manual/ref-variables.xml
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@ -1609,6 +1609,40 @@
</glossdef>
</glossentry>
<glossentry id='var-DISK_SIGNATURE'><glossterm>DISK_SIGNATURE</glossterm>
<glossdef>
<para>
Automatically generated random signature that allows the
OpenEmbedded build system to create a boot
loader configuration.
<filename>DISK_SIGNATURE</filename> is different each time
a <filename>directdisk</filename> image is built.
<note>
The "live" option used with
<link linkend='var-IMAGE_FSTYPES'><filename>IMAGE_FSTYPES</filename></link>
produces an image file that can be copied directly to
a CD or USB device and run as is.
</note>
The auto-generated <filename>DISK_SIGNATURE</filename> sets
<filename>SYSLINUX_ROOT</filename> as follows:
<literallayout class='monospaced'>
SYSLINUX_ROOT = "root=PARTUUID=${DISK_SIGNATURE}-02"
</literallayout>
</para>
<para>
It is possible to set the
<filename>DISK_SIGNATURE</filename> variable in your
<filename>local.conf</filename> file to a fixed
value if you do not want <filename>syslinux.cfg</filename>
changing for each build.
You might find this useful when you want to upgrade the
root filesystem on a device without having to recreate or
modify the master boot record.
</para>
</glossdef>
</glossentry>
<glossentry id='var-DISTRO'><glossterm>DISTRO</glossterm>
<glossdef>
<para>