#!/bin/sh
_daemon_user='ukrainealarm-client'
_daemon_group='ukrainealarm-client'
_var_dir='/var/ukrainealarm-client'

post_install() {
    # create daemon group, if not existing
    if
        getent group ${_daemon_group} >/dev/null
    then
        : OK group ${_daemon_group} already present
    else
        groupadd --system ${_daemon_group} 2> /dev/null || :
    fi

    # create daemon user, if not existing
    if
        getent passwd ${_daemon_user} >/dev/null
    then
       : OK user ${_daemon_user} already present
    else
        useradd --system --no-log-init --home ${_var_dir} --create-home --skel /dev/null \
            --shell /usr/bin/nologin --comment "Linux client for receiving alarms in Ukraine" \
            --group audio --gid ${_daemon_group} ${_daemon_user} 2> /dev/null || :
    fi
}

post_upgrade() {
    post_install $1
}

post_remove() {
    userdel --force ${_daemon_user} 2> /dev/null
    rm --dir ${_var_dir} 2> /dev/null
}