OSTree mount testing

ostree-mounttest.sh

#!/bin/sh -xe

function umountcleanup() {
    umount -R $1 2>/dev/null || true
}

umountcleanup initramfs

rm -f initramfs.img
dd if=/dev/zero of=initramfs.img seek=20M bs=1 count=1
mkfs.xfs initramfs.img

rm -f rootfs.img
dd if=/dev/zero of=rootfs.img seek=100M bs=1 count=1
mkfs.xfs rootfs.img

mkdir -p initramfs
mount -o loop initramfs.img ./initramfs
mkdir -p initramfs/sysroot
mount -o loop rootfs.img ./initramfs/sysroot
mount --make-rprivate ./initramfs/sysroot
cd initramfs
mkdir -p sysroot/deploy/ostree/sysroot
mkdir -p sysroot/deploy/ostree/var
mkdir -p sysroot/deploy/var
touch in-initramfs
touch sysroot/in-physroot
touch sysroot/deploy/var/in-var
touch sysroot/deploy/ostree/in-ostree
mount -c -n --bind ./sysroot/deploy/ostree ./sysroot/deploy/ostree
mount -c -n --bind ./sysroot ./sysroot/deploy/ostree/sysroot
mount -c -n --bind ./sysroot/deploy/var ./sysroot/deploy/ostree/var

mount -c -n --move ./sysroot/deploy/ostree ./sysroot
umount --lazy .
ls -al sysroot
echo "Running fake ostree shell..."
env PS1='<ostreetest> # ' bash
echo "Exiting fake ostree shell."