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#!/bin/sh
set -eu
# -------------------------------------------
log_info() { echo "$0[$$]: $*" >&2; }
log_error() { echo "$0[$$]: ERROR $*" >&2; }
do_mount_fs() {
log_info "mounting FS: $*"
[[ -e /proc/filesystems ]] && { grep -q "$1" /proc/filesystems || { log_error "Unknown filesystem"; return 1; } }
[[ -d "$2" ]] || mkdir -p "$2"
[[ -e /proc/mounts ]] && { grep -q -e "^$1 $2 $1" /proc/mounts && { log_info "$2 ($1) already mounted"; return 0; } }
mount -t "$1" "$1" "$2"
}
bail_out() {
log_error "$@"
log_info "Rebooting..."
#exec reboot -f
exec sh
}
get_ostree_sysroot() {
for opt in $(cat /proc/cmdline); do
arg=$(echo "$opt" | cut -d'=' -f1)
if [ "$arg" == "ostree_root" ]; then
echo "$opt" | cut -d'=' -f2-
return
fi
done
echo "LABEL=otaroot"
}
export PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/lib/ostree
log_info "Starting OSTree initrd script"
do_mount_fs proc /proc
do_mount_fs sysfs /sys
do_mount_fs devtmpfs /dev
do_mount_fs devpts /dev/pts
do_mount_fs tmpfs /dev/shm
do_mount_fs tmpfs /tmp
do_mount_fs tmpfs /run
# check if smack is active (and if so, mount smackfs)
grep -q smackfs /proc/filesystems && {
do_mount_fs smackfs /sys/fs/smackfs
# adjust current label and network label
echo System >/proc/self/attr/current
echo System >/sys/fs/smackfs/ambient
}
mkdir -p /sysroot
ostree_sysroot=$(get_ostree_sysroot)
mount $ostree_sysroot /sysroot || bail_out "Unable to mount $ostree_sysroot as physical sysroot"
ostree-prepare-root /sysroot
# move mounted devices to new root
cd /sysroot
for x in dev proc; do
log_info "Moving /$x to new rootfs"
mount -o move "/$x" "$x"
done
# switch to new rootfs
log_info "Switching to new rootfs"
mkdir -p run/initramfs
pivot_root . run/initramfs || bail_out "pivot_root failed."
log_info "Launching target init"
exec chroot . sh -c 'umount /run/initramfs; exec /sbin/init' \
<dev/console >dev/console 2>&1
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