sonic-buildimage/files/image_config/syslog/host_umount.sh

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#!/bin/bash
# This script is invoked at the closure of syslog socket during reboot
# This will stop journal services, unmount /var/log and delete loop device
# associated to /host to ensure proper unmount of /host
journal_stop() {
systemctl stop systemd-journald.service
systemctl stop systemd-journald.socket
systemctl stop systemd-journald-audit.socket
systemctl stop systemd-journald-dev-log.socket
}
delete_loop_device() {
umount /var/log
if [[ $? -ne 0 ]]
then
exit 0
fi
losetup -d /dev/loop1
}
case "$1" in
journal_stop|delete_loop_device)
$1
;;
*)
echo "Usage: $0 {journal_stop|delete_loop_device}" >&2
exit 1
;;
esac