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| -rw-r--r-- | documentation/ref-manual/ref-variables.xml | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml index 258ae2c..03d2034 100644 --- a/documentation/ref-manual/ref-variables.xml +++ b/documentation/ref-manual/ref-variables.xml @@ -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> |
