#! /bin/bash

#
## DESCRIPTION:
#   returning current username if privileged rights are exist
#   or
#   returning error, if privileged rights are not exist
#

#
## DEPENDENCIES: sudo apt|yum install -y whoami
#

#
## FUNCTIONS
#

execpause() {
	read -p "Press [ENTER] to continue... "
}
execquite() {
	echo "$(date +'%Y.%m.%d-%H:%M:%S') execution time is $(($(date +%s)-$time)) seconds, exit" | tee -a $logs
	if [ "${show}" != "qn" ];then
		execpause
	fi
	exit
}
execerror() {
	echo "$(date +'%Y.%m.%d-%H:%M:%S') error: $1" | tee -a $logs
	execquite
}
getconfig() {
	logs=$(cat $conf | grep "logs=" | cut -d= -f2)
}
checkroot() {
	if [ "${EUID}" -ne 0 ];then
		return 1 # false
	else
		return 0 # true
	fi
}

#
## PARAMETERS
#

show=${1}
conf=${2}
if [ -z "${conf}" ] || [ "${conf}" == "-" ];then
	conf=$(dirname $(realpath $0))/$(basename -s .sh $0).conf
fi

#
## VARIABLES
#

time=$(date +%s)
if [ ! -e ${conf} ];then
	:
else
	getconfig
fi
if [ -z "${logs}" ];then
	logs=/dev/null
elif [ ! -e ${logs} ];then
	touch ${logs}
fi

#
## RUN
#

checkroot && echo "Running as $(whoami)" && execquite || execerror "Restart this as root!"