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June 24, 2017 20:38
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#!/bin/bash | |
set -m | |
function start_udev() | |
{ | |
udevd & | |
} | |
function remove_buildtime_env_var() | |
{ | |
unset QEMU_CPU | |
} | |
# Send SIGTERM to child processes of PID 1. | |
function signal_handler() | |
{ | |
kill $pid | |
} | |
# On ResinOS 2.x devices, the hostname is set by the hostOS. | |
# For backward compatibility, we only update the hostname for ResinOS 1.x devices. | |
function update_hostname() | |
{ | |
if [ ${RESIN_DEVICE_UUID:0:7} != ${HOSTNAME:0:7} ]; then | |
# For 1.x Devices only. | |
HOSTNAME="$RESIN_DEVICE_TYPE-${RESIN_DEVICE_UUID:0:7}" | |
echo $HOSTNAME > /etc/hostname | |
echo "127.0.1.1 $HOSTNAME" >> /etc/hosts | |
hostname "$HOSTNAME" | |
fi | |
} | |
function mount_dev() | |
{ | |
mkdir -p /tmp | |
mount -t devtmpfs none /tmp | |
mkdir -p /tmp/shm | |
mount --move /dev/shm /tmp/shm | |
mkdir -p /tmp/mqueue | |
mount --move /dev/mqueue /tmp/mqueue | |
mkdir -p /tmp/pts | |
mount --move /dev/pts /tmp/pts | |
touch /tmp/console | |
mount --move /dev/console /tmp/console | |
umount /dev || true | |
mount --move /tmp /dev | |
# Since the devpts is mounted with -o newinstance by Docker, we need to make | |
# /dev/ptmx point to its ptmx. | |
# ref: https://www.kernel.org/doc/Documentation/filesystems/devpts.txt | |
ln -sf /dev/pts/ptmx /dev/ptmx | |
mount -t debugfs nodev /sys/kernel/debug | |
} | |
function init_systemd() | |
{ | |
GREEN='\033[0;32m' | |
echo -e "${GREEN}Systemd init system enabled." | |
for var in $(compgen -e); do | |
printf '%q="%q"\n' "$var" "${!var}" | |
done > /etc/docker.env | |
printf '#!/bin/bash\n exec ' > /etc/resinApp.sh | |
printf '%q ' "$@" >> /etc/resinApp.sh | |
chmod +x /etc/resinApp.sh | |
mkdir -p /etc/systemd/system/launch.service.d | |
cat <<-EOF > /etc/systemd/system/launch.service.d/override.conf | |
[Service] | |
WorkingDirectory=$(pwd) | |
EOF | |
exec /sbin/init quiet systemd.show_status=0 | |
} | |
function init_non_systemd() | |
{ | |
# trap the stop signal then send SIGTERM to user processes | |
trap signal_handler SIGRTMIN+3 SIGTERM | |
CMD=$(which "$1") | |
# echo error message, when executable file doesn't exist. | |
if [ $? == '0' ]; then | |
shift | |
if [ ! -z "$RESIN" ] && [ ! -z "$RESIN_DEVICE_UUID" ]; then | |
# run this on resin device only | |
start_udev | |
fi | |
tini -sg -- "$CMD" "$@" & | |
pid=$! | |
wait "$pid" | |
else | |
echo "Command not found: $1" | |
exit 1 | |
fi | |
} | |
remove_buildtime_env_var | |
INITSYSTEM=$(echo "$INITSYSTEM" | awk '{print tolower($0)}') | |
case "$INITSYSTEM" in | |
'1' | 'true') | |
INITSYSTEM='on' | |
;; | |
esac | |
if [ ! -z "$RESIN" ] && [ ! -z "$RESIN_DEVICE_UUID" ]; then | |
# run this on resin device only | |
update_hostname | |
mount_dev | |
fi | |
if [ "$INITSYSTEM" = "on" ]; then | |
init_systemd "$@" | |
else | |
init_non_systemd "$@" | |
fi |
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