Mini Shell

#!/bin/bash
# Starts/stops redis user services
# Parameters start|stop $USER
if (( $# < 2 )); then
    echo "You must specify an action and a user"
    exit 1
fi

ACTION=$1
USER=$2
HOMEDIR=$(/usr/bin/getent passwd "$USER" | /usr/bin/cut -d: -f6)

if [[ -f "/etc/cloudlinux-release" ]] ; then
  SOCKDIR1="${HOMEDIR}/.cagefs"
  SOCKDIR="${HOMEDIR}/.cagefs/tmp"
  REDISDIR="${HOMEDIR}/.cagefs/tmp/redis"
else
  SOCKDIR1="${HOMEDIR}/.lsns"
  SOCKDIR="${HOMEDIR}/.lsns/tmp"
  REDISDIR="${HOMEDIR}/.lsns/tmp/redis"
fi

if [ "$ACTION" == "start" ]; then

    if [ ! -d "$REDISDIR" ]; then
        mkdir -p "$SOCKDIR1" -m 0777
        chown -R "$USER" "$SOCKDIR1"
        mkdir -p "$SOCKDIR" -m 0777
        chown -R "$USER" "$SOCKDIR"
        mkdir -p "$REDISDIR" -m 0777
        chown -R "$USER" "$REDISDIR"
    fi

    DIR="$(dirname "$0")"
    PACKAGE_SIZES="${DIR}/../conf/redis_package_size.conf"
    if [ -e "${DIR}/../conf/use-valkey" ]; then
        USE_VALKEY="Y"
        REDIS="valkey"
    else
        REDIS="redis"
    fi

    if [ -e "${REDISDIR}/redis.size" ] && \
       SIZEMB=$(cat "${REDISDIR}/redis.size") ; 
    then
        echo "SIZEMB from size file: ${SIZEMB}"
    elif [ -e "${REDISDIR}/redis.package" ] && \
        PACKAGE=$(cat "${REDISDIR}/redis.package") && \
        PKGLINE=$(grep "${PACKAGE}", < "${PACKAGE_SIZES}") && \
        SIZEMB=$(echo "${PKGLINE}" | cut -d',' -f2 | tr -d '\r')
    then
        echo "SIZEMB from package ${PACKAGE}: ${SIZEMB}"
    elif SIZEMB=$("cat" "${DIR}/../conf/redis_default_size.conf") ; then
        echo "SIZEMB from default file: ${SIZEMB}"
    else
        SIZEMB="64"
        echo "SIZEMB final default: ${SIZEMB}"
    fi
    rm -f "${REDISDIR}"/*.rdb

    "/usr/bin/${REDIS}-server" --port 0 --unixsocketperm 700 --unixsocket "${SOCKDIR}"/redis.sock --dir "${REDISDIR}" --maxmemory "${SIZEMB}"mb --supervised systemd
elif [ "$ACTION" == "stop" ]; then
    echo "Stopping redis for ${USER}"
else
    echo "Undefined action: ${ACTION}"
    exit 1
fi