From 2be3b2607fd164d18498299dbfc020ff17dd2ca9 Mon Sep 17 00:00:00 2001 From: Brian Lloyd Date: Sat, 28 Jun 2014 10:48:24 -0500 Subject: Move boot media to /media/realroot for easy access after boot. There are cases where software after boot may need to know the current boot disk. Under the current system, it is not guaranteed which disk is the boot. While /media/sda is a good guess, it isn't always right, nor is it a good assumption that only one boot disk is in the system. This gives a standard path to the original boot disk mount which can be used to, for instance, update the syslinux file on the boot media with a newer kernel, or updating the boot parameters to add user options for future boots. Knowing which disk is the boot media keeps from updating the non-boot disk when for instance multiple syslinux boot medias are plugged in (ie ensure correct syslinux is updated when the booted system is updated). Signed-off-by: Brian Lloyd Signed-off-by: Saul Wold --- meta/recipes-core/initrdscripts/files/init-live.sh | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'meta/recipes-core/initrdscripts/files') diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh index 28219641a4..d852c5737f 100644 --- a/meta/recipes-core/initrdscripts/files/init-live.sh +++ b/meta/recipes-core/initrdscripts/files/init-live.sh @@ -8,6 +8,8 @@ MOUNT="/bin/mount" UMOUNT="/bin/umount" ISOLINUX="" +ROOT_DISK="" + # Copied from initramfs-framework. The core of this script probably should be # turned into initramfs-framework modules to reduce duplication. udev_daemon() { @@ -80,6 +82,10 @@ boot_live_root() { udevadm settle --timeout=3 --quiet killall "${_UDEV_DAEMON##*/}" 2>/dev/null + # Allow for identification of the real root even after boot + mkdir -p ${ROOT_MOUNT}/media/realroot + mount -n --move "/run/media/${ROOT_DISK}" ${ROOT_MOUNT}/media/realroot + # Move the mount points of some filesystems over to # the corresponding directories under the real root filesystem. for dir in `awk '/\/dev.* \/run\/media/{print $2}' /proc/mounts`; do @@ -116,10 +122,12 @@ do for i in `ls /run/media 2>/dev/null`; do if [ -f /run/media/$i/$ROOT_IMAGE ] ; then found="yes" + ROOT_DISK="$i" break elif [ -f /run/media/$i/isolinux/$ROOT_IMAGE ]; then found="yes" ISOLINUX="isolinux" + ROOT_DISK="$i" break fi done @@ -150,7 +158,7 @@ mount_and_boot() { mkdir $ROOT_MOUNT mknod /dev/loop0 b 7 0 2>/dev/null - if ! mount -o rw,loop,noatime,nodiratime /run/media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then + if ! mount -o rw,loop,noatime,nodiratime /run/media/$ROOT_DISK/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then fatal "Could not mount rootfs image" fi -- cgit 1.2.3-korg