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build/pkg/release-rpi3/genimage.sh
David Oberhollenzer 7f5f64978d cleanup: restructure user directories
Instead of having an overlay mounted /root in the root filesystem,
move it to the other user directories, i.e. /usr/root.

We then overlay mount the entire /usr directory. This still allows
us to mount /usr from somewhere else if we wish, but cleans
up/simplifies the filesystem for now and implements some default
management of general user directories.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
2018-04-20 13:24:24 +02:00

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#!/bin/sh
set -u -e
FILE=$1
MOUNTED=0
LOOPATTACHED=0
function do_cleanup() {
[ $MOUNTED -ne 0 ] && umount /tmp/mnt.$$
[ $LOOPATTACHED -ne 0 ] && losetup -d ${LODEV}
rmdir /tmp/mnt.$$
}
trap do_cleanup ERR INT
cd `dirname $0`
if [ -e "$FILE" ]; then
echo "Error, $FILE exists"
exit 1
fi
truncate -s 1G $FILE
parted --script $FILE \
"mklabel msdos" \
"mkpart primary fat32 1M 256M" \
"mkpart primary btrfs 256M 100%" \
"set 1 boot on"
LODEV=$(losetup -f)
losetup -P ${LODEV} ${FILE}
LOOPATTACHED=1
mkfs.vfat ${LODEV}p1
mkfs.btrfs -f ${LODEV}p2
mkdir /tmp/mnt.$$
mount -t vfat ${LODEV}p1 /tmp/mnt.$$
MOUNTED=1
cp -r boot/* /tmp/mnt.$$/
umount /tmp/mnt.$$
MOUNTED=0
mount -t btrfs ${LODEV}p2 /tmp/mnt.$$
MOUNTED=1
mkdir /tmp/mnt.$$/etc /tmp/mnt.$$/etc_work
mkdir /tmp/mnt.$$/var_lib /tmp/mnt.$$/var_lib_work
mkdir -p /tmp/mnt.$$/usr/root /tmp/mnt.$$/usr_work
chmod 750 /tmp/mnt.$$/usr/root /tmp/mnt.$$/usr_work
chown 0:0 /tmp/mnt.$$/usr/root
umount /tmp/mnt.$$
MOUNTED=0
losetup -d ${LODEV}
LOOPATTACHED=0
rmdir /tmp/mnt.$$