fromiso: add support for local ISO (ONIE)

An ONIE system on boot will uncompress a local ISO image. Handle that
case in live-boot to support it.

diff --git a/components/9990-misc-helpers.sh b/components/9990-misc-helpers.sh
index 23024eb..1b89e59 100755 (executable)
--- a/components/9990-misc-helpers.sh
+++ b/components/9990-misc-helpers.sh
@@ -120,7 +120,24 @@ check_dev ()
 
                if [ "$ISO_DEVICE" = "/" ]
                then
 
                if [ "$ISO_DEVICE" = "/" ]
                then

-                       echo "Warning: device for bootoption fromiso= ($FROMISO) not found.">>/boot.log
+                       # not a block device, check if it's an iso file, for
+                       # example an ISO when booting on an ONIE system
+                       if echo "${FROMISO}" | grep -q "\.iso$"
+                       then
+                               fs_type=$(get_fstype "${FROMISO}")
+                               if is_supported_fs ${fs_type}
+                               then
+                                       mkdir /run/live/fromiso
+                                       mount -t $fs_type "${FROMISO}" /run/live/fromiso
+                                       if [ "$?" != 0 ]
+                                       then
+                                               echo "Warning: unable to mount ${FROMISO}." >>/boot.log
+                                       fi
+                                       devname="/run/live/fromiso"
+                               fi
+                       else
+                               echo "Warning: device for bootoption fromiso= ($FROMISO) not found.">>/boot.log
+                       fi

                else
                        fs_type=$(get_fstype "${ISO_DEVICE}")
                        if is_supported_fs ${fs_type}
                else
                        fs_type=$(get_fstype "${ISO_DEVICE}")
                        if is_supported_fs ${fs_type}