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Current File : //var/lib/dpkg/info/rmmagent.preinst

#!/bin/sh

# Reference: https://wiki.debian.org/MaintainerScripts

set -e

if [ -n "${RMM_DEBUG}" ]; then
    echo "Running: $0 $@"
    set -x
fi

RMM_BASE="/usr/local/rmmagent"
SVC_NAME="rmmagent"
LOG_DIR="/var/log/rmmagent"

SYSTEM_CTL="$(command -v systemctl 2>/dev/null || true)"
INVOKE_RC="$(command -v invoke-rc.d 2>/dev/null || true)"

# Init logs, if not available
mkdir -p "${LOG_DIR}"

logInfo() # message
{
    logMessage "$1" false
    if [ -n "${RMM_DEBUG}" ]; then
        echo "$1"
    fi
}

logWarning() # message
{
    logMessage "$1" true
    echo "$1"
}

logMessage() # message, isWarning
{
    if [ -d "${LOG_DIR}" ]; then
        Prefix="I"
        if ${2}; then
            Prefix="W"
        fi
        echo "[`date '+%Y-%m-%d %H:%M:%S'`] [${Prefix}] $1" >> "${LOG_DIR}/package_script.log"
    fi
}

stopService()
{
    logInfo "Stop service"
    if [ -x "${SYSTEM_CTL}" ]; then
        logInfo "Stopping with systemd"
        "${SYSTEM_CTL}" stop "${SVC_NAME}.service"
    elif [ -x "/etc/init.d/${SVC_NAME}" ]; then
        logInfo "Stopping with init.d"
        if [ -x "${INVOKE_RC}" ]; then
            "${INVOKE_RC}" "${SVC_NAME}" stop
        else
            "/etc/init.d/${SVC_NAME}" stop
        fi
    fi
}

migrateFromLegacyAgent()
{
    if "${RMM_BASE}/rmmagentd" --version 2>&1 >/dev/null | grep -q "Undefined argument '--version'"; then
        logInfo "Legacy Agent detected. Terminating."
        "${RMM_BASE}/rmmagentd" --terminate >/dev/null 2>&1 || logInfo "Legacy Agent was not installed"
    fi
}

logInfo "preinst script is executing: $1 command"

case "$1" in
    upgrade)
        stopService
        migrateFromLegacyAgent
        ;;
    install|abort-upgrade)
        ;;
    *)
        logWarning "preinst called with unknown argument '$1'" >&2
        exit 1
        ;;
esac

exit 0