hyperion.ng/cmake/debian/preinst

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#!/bin/sh
echo "---Hyperion ambient light preinst ---"
# search for users in system, returns first entry
FOUND_USR=`who | grep -o -m1 '^\w*\b'` || "root"
# stop running daemon before we install
if pgrep hyperiond > /dev/null 2>&1
then
if grep -m1 systemd /proc/1/comm > /dev/null
then
echo "--> stop init deamon: systemd"
# systemd
systemctl stop hyperiond"@${FOUND_USR}" 2> /dev/null
elif [ -e /sbin/initctl ]
then
echo "--> stop init deamon: upstart"
# upstart
initctl stop hyperiond
else
echo "--> stop init deamon: sysV"
# sysV
service hyperiond stop 2>/dev/null
fi
fi
# In case we don't use a service kill all instances
killall hyperiond 2> /dev/null
# overwrite last return code
exit 0
#$USR=hyperionIS;
#addToGroup()
##{
# getent group $1 && adduser $USR $1;
#}
#check if user exists
#if id $USR >/dev/null 2>&1; then
# echo "--> hyperion user exists, skip creation";
#else
## create user
# echo "--> Create Hyperion user";
# adduser --system --group $USR;
#fi
# add user to groups if required
## secondary user groups that are required to access system things
#addToGroup(dialout);
#addToGroup(video);
#addToGroup(audio);
#addToGroup(systemd-journal);
# platform specific groups
#addToGroup(i2c);
#addToGroup(spi);
#addToGroup(gpio);