| #!/bin/sh |
| |
| echo "Preparing /etc overlay" |
| /bin/mount -t tmpfs tmpfs /.ov -o mode=0700 |
| /bin/mkdir /.ov/etc-u |
| /bin/mkdir /.ov/etc-w |
| /bin/mount overlay -t overlay /etc -olowerdir=/etc,upperdir=/.ov/etc-u,workdir=/.ov/etc-w |
| |
| /bin/mount -t proc proc /proc -o rw,nosuid,nodev,noexec,relatime |
| if grep -q rauc.slot=A /proc/cmdline; then |
| RAUC_SLOT_NO=0 |
| RAUC_SLOT_NAME=A |
| elif grep -q rauc.slot=B /proc/cmdline; then |
| RAUC_SLOT_NO=1 |
| RAUC_SLOT_NAME=B |
| else |
| echo "Cannot determine active RAUC rootfs slot" |
| #exit 1 |
| fi |
| /bin/umount /proc |
| echo "RAUC: active slot ${RAUC_SLOT_NAME}" |
| |
| # sed magic: |
| # 1) use `sed -n` so that we only print what's explicitly printed |
| # 2) anchor the search between the "[slot.cfg.$RAUC_SLOT_NO]" and any other section |
| # 3) look for a line beginning with "device=" |
| # 4) take stuff which is behind the "=" |
| # 5) print it |
| DEVICE=$(sed -n "/\[slot\.cfg\.${RAUC_SLOT_NO}\]/,/\[.*\]/{/^device=/s/\(.*\)=\(.*\)/\\2/p}" /etc/rauc/system.conf) |
| |
| if [ x$DEVICE = x ]; then |
| echo "Cannot determine device for /cfg from RAUC" |
| #exit 1 |
| fi |
| |
| if [ ! -b $DEVICE ]; then |
| echo "Device ${DEVICE} is not a block device" |
| #exit 1 |
| fi |
| |
| echo "Mounting /cfg" |
| /bin/mount ${DEVICE} /cfg -t auto -o relatime,nosuid,nodev |
| |
| if [ -d /cfg/etc ]; then |
| echo "Restoring /etc from /cfg" |
| /bin/cp -a /cfg/etc/* /etc/ |
| fi |
| |
| exec /sbin/init |