install.func

#!/usr/bin/env bash
# Copyright (c) 2021-2026 community-scripts ORG
# Author: tteck (tteckster)
# Co-Author: MickLesk
# Co-Author: michelroegl-brunner
# License: MIT | https://github.com/community-scripts/core/raw/main/LICENSE

# ==============================================================================
# INSTALL.FUNC - UNIFIED CONTAINER INSTALLATION & SETUP
# ==============================================================================

# All-in-One install.func supporting official Proxmox LXC templates:
#   - Debian, Ubuntu, Devuan (apt, systemd/sysvinit)
#   - Alpine (apk, OpenRC)
#   - Fedora, Rocky, AlmaLinux, CentOS Stream (dnf, systemd)
#   - openSUSE (zypper, systemd)
#   - Gentoo (emerge, OpenRC)
#   - openEuler (dnf, systemd)
#
# Supported templates (pveam available):
#   almalinux-9/10, alpine-3.x, centos-9-stream, debian-12/13,
#   devuan-5, fedora-42, gentoo-current, openeuler-25,
#   opensuse-15.x, rockylinux-9/10, ubuntu-22.04/24.04/25.04
#
# Features:
#   - Automatic OS detection
#   - Unified package manager abstraction
#   - Init system abstraction (systemd/OpenRC/sysvinit)
#   - Network connectivity verification
#   - MOTD and SSH configuration
#   - Container customization
#
# ==============================================================================

# ==============================================================================
# SECTION 1: INITIALIZATION & OS DETECTION
# ==============================================================================

# Global variables for OS detection

# ── Engine URL (container side) ───────────────────────────────────────────────
# Inside the container there is no _cs_source_func resolver, so names are
# folder-qualified paths relative to the repo root, same as on the host.
_cs_core_url() {
  echo "${COMMUNITY_SCRIPTS_CORE_URL:-https://raw.githubusercontent.com/community-scripts/core/main}/${1:?func path}"
}

_CS_CURL_RETRY=(--retry 3 --retry-delay 1 --retry-connrefused --connect-timeout 10)

# curl -S prints one line per failed attempt, so a download that recovers on the

_cs_curl_retry() {
  local url="${1:?url}" err rc=0
  local attempt=1 max_attempts=4 backoff=1 timeout=30

  err="$(mktemp 2>/dev/null)" || {
    curl -fsSL --connect-timeout 10 --max-time "$timeout" "$url"
    return
  }

  while [[ $attempt -le $max_attempts ]]; do
    if curl -fsSL --connect-timeout 10 --max-time "$timeout" "$url" 2>"$err"; then
      rm -f "$err"
      return 0
    else
      rc=$?
    fi
    ((attempt == max_attempts)) && break
    sleep "$backoff"
    backoff=$((backoff * 2))
    ((backoff > 30)) && backoff=30
    timeout=$((timeout * 2))
    ((attempt++))
  done

  cat "$err" >&2
  rm -f "$err"
  return "$rc"
}

# The host's prefetch cannot reach a container's filesystem, so fetch the
# engine concurrently on this side too. verify-split-files.yml checks the list.
_CS_CT_ENGINE_FILES=(
  core/core.func core/error_handler.func
  api/exitcodes.func api/errorlog.func
  lib/tools.func lib/alpine.func lib/db.func lib/forge.func
  lib/hwaccel.func lib/runtime.func lib/system.func
)

_cs_ct_prefetch_engine() {
  [[ -n "${COMMUNITY_SCRIPTS_CORE_DIR:-}" ]] && return 0
  [[ "${COMMUNITY_SCRIPTS_NO_PREFETCH:-0}" == "1" ]] && return 1
  command -v curl >/dev/null 2>&1 || return 1

  local ver major minor
  ver="$(curl --version 2>/dev/null | head -1 | awk '{print $2}')" || return 1
  major="${ver%%.*}"
  minor="${ver#*.}"
  minor="${minor%%.*}"
  [[ "$major" =~ ^[0-9]+$ && "$minor" =~ ^[0-9]+$ ]] || return 1
  ((major > 7 || (major == 7 && minor >= 66))) || return 1

  local base dir=""
  for base in /dev/shm "${TMPDIR:-/tmp}" /tmp; do
    [[ -d "$base" && -w "$base" ]] || continue
    dir="$(mktemp -d "${base}/cs-engine.XXXXXX" 2>/dev/null)" && break
    dir=""
  done
  [[ -z "$dir" ]] && return 1

  local args=() rel core_base
  core_base="${COMMUNITY_SCRIPTS_CORE_URL:-https://raw.githubusercontent.com/community-scripts/core/main}"
  mkdir -p "${dir}/core" "${dir}/api" "${dir}/lib" 2>/dev/null || true
  for rel in "${_CS_CT_ENGINE_FILES[@]}"; do
    args+=(-o "${dir}/${rel}" "${core_base}/${rel}")
  done

  curl -fsSL --parallel --parallel-immediate --parallel-max 16 \
    "${_CS_CURL_RETRY[@]}" --max-time 60 "${args[@]}" 2>/dev/null

  local kept=0
  for rel in "${_CS_CT_ENGINE_FILES[@]}"; do
    if [[ -s "${dir}/${rel}" ]]; then
      kept=$((kept + 1))
    else
      rm -f "${dir}/${rel}" 2>/dev/null
    fi
  done
  if ((kept == 0)); then
    rm -rf "$dir" 2>/dev/null
    return 1
  fi

  COMMUNITY_SCRIPTS_CORE_DIR="$dir"
  export COMMUNITY_SCRIPTS_CORE_DIR
  return 0
}

# Prefetched copy when there is one, network otherwise.
_cs_engine_read() {
  local name="${1:?func path}"
  local copy="${COMMUNITY_SCRIPTS_CORE_DIR:-}/${name}"
  if [[ -n "${COMMUNITY_SCRIPTS_CORE_DIR:-}" && -s "$copy" ]]; then
    cat "$copy"
    return 0
  fi
  if command -v curl >/dev/null 2>&1; then
    _cs_curl_retry "$(_cs_core_url "$name")"
  else
    wget -qO- "$(_cs_core_url "$name")"
  fi
}

OS_TYPE=""     # debian, ubuntu, devuan, alpine, fedora, rocky, alma, centos, opensuse, gentoo, openeuler
OS_FAMILY=""   # debian, alpine, rhel, suse, gentoo, arch
OS_VERSION=""  # Version number
PKG_MANAGER="" # apt, apk, dnf, yum, zypper, emerge
INIT_SYSTEM="" # systemd, openrc, sysvinit

# ------------------------------------------------------------------------------
# detect_os()
#
# Detects the operating system and sets global variables:
#   OS_TYPE, OS_FAMILY, OS_VERSION, PKG_MANAGER, INIT_SYSTEM
# ------------------------------------------------------------------------------
detect_os() {
  if [[ -f /etc/os-release ]]; then
    # shellcheck disable=SC1091
    . /etc/os-release
    OS_TYPE="${ID:-unknown}"
    # Normalize to lowercase: some distros ship mixed-case IDs (e.g. openEuler ID="openEuler")
    OS_TYPE="${OS_TYPE,,}"
    OS_VERSION="${VERSION_ID:-unknown}"
  elif [[ -f /etc/alpine-release ]]; then
    OS_TYPE="alpine"
    OS_VERSION=$(cat /etc/alpine-release)
  elif [[ -f /etc/debian_version ]]; then
    OS_TYPE="debian"
    OS_VERSION=$(cat /etc/debian_version)
  elif [[ -f /etc/redhat-release ]]; then
    OS_TYPE="centos"
    OS_VERSION=$(grep -oE '[0-9]+\.[0-9]+' /etc/redhat-release | head -1)
  elif [[ -f /etc/arch-release ]]; then
    OS_TYPE="arch"
    OS_VERSION="rolling"
  elif [[ -f /etc/gentoo-release ]]; then
    OS_TYPE="gentoo"
    OS_VERSION=$(cat /etc/gentoo-release | grep -oE '[0-9.]+')
  else
    OS_TYPE="unknown"
    OS_VERSION="unknown"
  fi

  # Normalize OS type and determine family
  case "$OS_TYPE" in
  debian)
    OS_FAMILY="debian"
    PKG_MANAGER="apt"
    ;;
  ubuntu)
    OS_FAMILY="debian"
    PKG_MANAGER="apt"
    ;;
  devuan)
    OS_FAMILY="debian"
    PKG_MANAGER="apt"
    ;;
  kali)
    OS_FAMILY="debian"
    PKG_MANAGER="apt"
    ;;
  # /etc/os-release says linuxmint; the image catalog and var_os say mint.
  linuxmint | mint)
    OS_TYPE="mint"
    OS_FAMILY="debian"
    PKG_MANAGER="apt"
    ;;
  alpine)
    OS_FAMILY="alpine"
    PKG_MANAGER="apk"
    ;;
  fedora)
    OS_FAMILY="rhel"
    PKG_MANAGER="dnf"
    ;;
  rocky | rockylinux)
    OS_TYPE="rocky"
    OS_FAMILY="rhel"
    PKG_MANAGER="dnf"
    ;;
  alma | almalinux)
    OS_TYPE="alma"
    OS_FAMILY="rhel"
    PKG_MANAGER="dnf"
    ;;
  centos)
    OS_FAMILY="rhel"
    # CentOS 7 uses yum, 8+ uses dnf
    if [[ "${OS_VERSION%%.*}" -ge 8 ]]; then
      PKG_MANAGER="dnf"
    else
      PKG_MANAGER="yum"
    fi
    ;;
  rhel)
    OS_FAMILY="rhel"
    PKG_MANAGER="dnf"
    ;;
  openeuler)
    OS_FAMILY="rhel"
    PKG_MANAGER="dnf"
    ;;
  # Oracle Linux reports ID=ol, Amazon Linux ID=amzn. Both normalize to the
  # name the image catalog and var_os use, so one spelling covers both ends.
  ol | oracle | oraclelinux)
    OS_TYPE="oracle"
    OS_FAMILY="rhel"
    PKG_MANAGER="dnf"
    ;;
  amzn | amazonlinux)
    OS_TYPE="amazonlinux"
    OS_FAMILY="rhel"
    PKG_MANAGER="dnf"
    ;;
  opensuse* | sles)
    OS_TYPE="opensuse"
    OS_FAMILY="suse"
    PKG_MANAGER="zypper"
    ;;
  arch | archlinux | archarm)
    OS_TYPE="arch"
    OS_FAMILY="arch"
    PKG_MANAGER="pacman"
    ;;
  gentoo)
    OS_FAMILY="gentoo"
    PKG_MANAGER="emerge"
    ;;
  *)
    OS_FAMILY="unknown"
    PKG_MANAGER="unknown"
    ;;
  esac

  # Detect init system
  if command -v systemctl &>/dev/null && [[ -d /run/systemd/system ]]; then
    INIT_SYSTEM="systemd"
  elif command -v rc-service &>/dev/null || [[ -d /etc/init.d && -f /sbin/openrc ]]; then
    INIT_SYSTEM="openrc"
  elif [[ -f /etc/inittab ]]; then
    INIT_SYSTEM="sysvinit"
  else
    INIT_SYSTEM="unknown"
  fi
}

# ------------------------------------------------------------------------------
# Bootstrap: Ensure curl is available and source core functions
# ------------------------------------------------------------------------------
# A freshly booted container may not have DNS up yet, and `source <(...)` hides
# the exit code of whatever produced the stream: a failed download used to source
# an empty script, and the first call into it failed with "command not found"
# rather than naming the file that could not be fetched. The probe catches the
# other half — a truncated response that parses but is missing what we need.
_bootstrap_die() {
  local msg="$1" url probe
  if [[ -n "${2:-}" ]] && command -v curl >/dev/null 2>&1; then
    url="$(_cs_core_url "$2")"
    probe="$(curl -sS -o /dev/null -w 'HTTP %{http_code}' --max-time 15 "$url" 2>&1 | tr '\n' ' ')"
    msg="${msg} from ${url} (${probe% })"
  fi
  if declare -f msg_error >/dev/null 2>&1; then
    msg_error "$msg"
  else
    echo "FATAL: $msg" >&2
  fi
  # core.func is not loaded yet, so nothing else writes the log the host collects
  [[ -n "${INSTALL_LOG:-}" ]] && echo "[ERROR] $msg" >>"$INSTALL_LOG" 2>/dev/null
  exit 115
}

_bootstrap_source() {
  local rel="${1:?func path}" probe="${2:?probe function}" content
  # From the file when prefetched, so the error handler can read a failing line back.
  if [[ -n "${COMMUNITY_SCRIPTS_CORE_DIR:-}" && -s "${COMMUNITY_SCRIPTS_CORE_DIR}/${rel}" ]]; then
    source "${COMMUNITY_SCRIPTS_CORE_DIR}/${rel}"
  else
    content="$(_cs_engine_read "$rel")" && [[ -n "$content" ]] ||
      _bootstrap_die "Failed to download ${rel}" "$rel"
    source /dev/stdin <<<"$content"
  fi
  declare -f "$probe" >/dev/null 2>&1 ||
    _bootstrap_die "${rel} loaded but incomplete (missing ${probe})"
}

_bootstrap() {
  # Minimal bootstrap to get curl installed
  if ! command -v curl &>/dev/null; then
    printf "\r\e[2K%b" '\033[93m Setup Source \033[m' >&2
    if command -v apt-get &>/dev/null; then
      apt-get update &>/dev/null && apt-get install -y curl &>/dev/null
    elif command -v apk &>/dev/null; then
      apk update &>/dev/null && apk add curl &>/dev/null
    elif command -v dnf &>/dev/null; then
      dnf install -y curl &>/dev/null
    elif command -v yum &>/dev/null; then
      yum install -y curl &>/dev/null
    elif command -v zypper &>/dev/null; then
      zypper install -y curl &>/dev/null
    elif command -v pacman &>/dev/null; then
      pacman -Sy --noconfirm curl &>/dev/null
    elif command -v emerge &>/dev/null; then
      # Gentoo stage3 has no curl and no portage tree on first boot.
      # Sync portage (webrsync = fast snapshot) then prefer binary package.
      emerge-webrsync --quiet &>/dev/null || emerge --sync --quiet &>/dev/null
      emerge --quiet --getbinpkg --usepkg net-misc/curl &>/dev/null ||
        emerge --quiet net-misc/curl &>/dev/null
    fi
  fi

  # _cs_engine_read picks curl or wget itself, so nothing needs to be chosen
  # here — but if the install above left neither, every fetch below returns an
  # empty stream and gets sourced as an empty script. Say so instead.
  if ! command -v curl &>/dev/null && ! command -v wget &>/dev/null; then
    echo "ERROR: neither curl nor wget available — cannot bootstrap" >&2
    exit 1
  fi

  # Two roots: the engine (core) and the scripts live in separate repos, and
  # inside the container there is no resolver — the host exports both bases.
  # Override either independently for fork/branch testing.
  COMMUNITY_SCRIPTS_URL="${COMMUNITY_SCRIPTS_URL:-https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main}"
  COMMUNITY_SCRIPTS_CORE_URL="${COMMUNITY_SCRIPTS_CORE_URL:-https://raw.githubusercontent.com/community-scripts/core/main}"

  # A TMPDIR pointing at something that does not exist kills every mktemp in the
  # engine. pam_systemd sets /tmp/user/<uid> on some hosts and the directory is
  # not there in a fresh container, so the first mktemp -d returned 1 and took
  # the install with it.
  if [[ -n "${TMPDIR:-}" && ! -d "$TMPDIR" ]]; then
    mkdir -p "$TMPDIR" 2>/dev/null || unset TMPDIR
  fi

  # Mark container context BEFORE error handling starts: error_handler/on_exit
  # must write local failure artifacts instead of talking to the telemetry API
  # (the host is the single telemetry reporter).
  export TELEMETRY_CONTEXT="container"

  # lxc-attach carries the host's engine directory over; it does not exist in here.
  if [[ -n "${COMMUNITY_SCRIPTS_CORE_DIR:-}" && ! -d "${COMMUNITY_SCRIPTS_CORE_DIR}" ]]; then
    unset COMMUNITY_SCRIPTS_CORE_DIR
  fi

  # Source core functions
  _cs_ct_prefetch_engine || true
  _bootstrap_source core/core.func load_functions
  _bootstrap_source api/exitcodes.func explain_exit_code
  _bootstrap_source api/errorlog.func _tm_focus
  _bootstrap_source core/error_handler.func catch_errors
  # The dev helpers are worth a round trip only when a flag is set: core.func's
  # timing hooks no-op without them, and error_handler's exit path asks for the
  # summary with declare -f. The host exports the parsed DEV_MODE_* flags, so
  # there is nothing to re-parse on this side.
  if [[ -n "${dev_mode:-}" ]]; then
    _bootstrap_source core/dev-mode.func parse_dev_mode
  fi
  load_functions
  catch_errors

  get_lxc_ip
}

# Run bootstrap and OS detection
_bootstrap
detect_os

# Persist diagnostics setting inside container (exported from build.func)
# so addon scripts running later can find the user's choice
if [[ ! -f /usr/local/community-scripts/diagnostics ]]; then
  mkdir -p /usr/local/community-scripts
  echo "DIAGNOSTICS=${DIAGNOSTICS:-no}" >/usr/local/community-scripts/diagnostics
fi

# ------------------------------------------------------------------------------
# post_progress_to_api()
#
# - Lightweight progress ping from inside the container
# - Updates the existing telemetry record status
# - Arguments:
#   * $1: status (optional, default: "configuring")
# - Signals that the installation is actively progressing (not stuck)
# - Fire-and-forget: never blocks or fails the script
# - Only executes if DIAGNOSTICS=yes and RANDOM_UUID is set
# ------------------------------------------------------------------------------
post_progress_to_api() {
  command -v curl &>/dev/null || return 0
  [[ "${DIAGNOSTICS:-no}" == "no" ]] && return 0
  [[ -z "${RANDOM_UUID:-}" ]] && return 0

  local progress_status="${1:-configuring}"

  # The only telemetry a container sends; terminal statuses come from the host.
  curl -fsS -m 5 -X POST "${TELEMETRY_URL:-https://telemetry.community-scripts.org/telemetry}" \
    -H "Content-Type: application/json" \
    -A "community-scripts-core/${TELEMETRY_PAYLOAD_VERSION:-3}" \
    -d "{\"payload_version\":${TELEMETRY_PAYLOAD_VERSION:-3},\"random_id\":\"${RANDOM_UUID}\",\"execution_id\":\"${EXECUTION_ID:-${RANDOM_UUID}}\",\"type\":\"lxc\",\"nsapp\":\"${app:-unknown}\",\"status\":\"${progress_status}\",\"platform\":\"${TELEMETRY_PLATFORM:-}\",\"repo_source\":\"${REPO_SOURCE:-}\",\"repo_slug\":\"${REPO_SLUG:-}\"}" &>/dev/null || true
}

# ==============================================================================
# SECTION 2: PACKAGE MANAGER ABSTRACTION
# ==============================================================================

# ------------------------------------------------------------------------------
# pkg_update()
#
# Updates package manager cache/database
# ------------------------------------------------------------------------------
pkg_update() {
  # Safety: re-detect if PKG_MANAGER doesn't match available commands
  if [[ "$PKG_MANAGER" == "apt" ]] && ! command -v apt-get &>/dev/null; then
    msg_warn "PKG_MANAGER='apt' but apt-get not found (OS: ${OS_TYPE:-unknown}) — re-detecting"
    detect_os
  fi
  if [[ "$PKG_MANAGER" == "apk" ]] && ! command -v apk &>/dev/null; then
    msg_warn "PKG_MANAGER='apk' but apk not found (OS: ${OS_TYPE:-unknown}) — re-detecting"
    detect_os
  fi

  case "$PKG_MANAGER" in
  apt)
    if ! $STD apt-get update; then
      local failed_mirror
      failed_mirror=$(grep -m1 -oP '(?<=URIs: https?://)[^/]+' /etc/apt/sources.list.d/debian.sources 2>/dev/null || grep -m1 -oP '(?<=deb https?://)[^/]+' /etc/apt/sources.list 2>/dev/null || echo "unknown")
      # A mirror change cannot fix a resolver problem, and probing them all takes
      # one to two minutes before reporting "possible CDN synchronization issue".
      if ! getent hosts deb.debian.org >/dev/null 2>&1 &&
        ! getent hosts archive.ubuntu.com >/dev/null 2>&1; then
        msg_error "apt-get update failed and no Debian/Ubuntu host resolves - this is DNS, not the mirror"
        msg_custom "${INFO:-i}" "${YW:-}" "Check /etc/resolv.conf and that /etc is traversable (o+x)"
        return 1
      fi

      msg_warn "apt-get update failed (${failed_mirror}), trying alternate mirrors..."
      local distro
      distro=$(. /etc/os-release 2>/dev/null && echo "$ID" || echo "debian")

      local eu_mirrors us_mirrors ap_mirrors
      if [[ "$distro" == "ubuntu" ]]; then
        eu_mirrors="de.archive.ubuntu.com fr.archive.ubuntu.com se.archive.ubuntu.com nl.archive.ubuntu.com it.archive.ubuntu.com ch.archive.ubuntu.com mirrors.xtom.de"
        us_mirrors="us.archive.ubuntu.com archive.ubuntu.com mirrors.edge.kernel.org mirror.csclub.uwaterloo.ca mirrors.ocf.berkeley.edu mirror.math.princeton.edu"
        ap_mirrors="au.archive.ubuntu.com jp.archive.ubuntu.com kr.archive.ubuntu.com tw.archive.ubuntu.com mirror.aarnet.edu.au"
      else
        eu_mirrors="ftp.de.debian.org ftp.fr.debian.org ftp.nl.debian.org ftp.uk.debian.org ftp.ch.debian.org ftp.se.debian.org ftp.it.debian.org ftp.fau.de ftp.halifax.rwth-aachen.de debian.mirror.lrz.de mirror.init7.net debian.ethz.ch mirrors.dotsrc.org debian.mirrors.ovh.net"
        us_mirrors="ftp.us.debian.org ftp.ca.debian.org debian.csail.mit.edu mirrors.ocf.berkeley.edu mirrors.wikimedia.org debian.osuosl.org mirror.cogentco.com"
        ap_mirrors="ftp.au.debian.org ftp.jp.debian.org ftp.tw.debian.org ftp.kr.debian.org ftp.hk.debian.org ftp.sg.debian.org mirror.aarnet.edu.au mirror.nitc.ac.in"
      fi

      local tz regional others
      tz=$(cat /etc/timezone 2>/dev/null || echo "UTC")
      case "$tz" in
      Europe/* | Arctic/*)
        regional="$eu_mirrors"
        others="$us_mirrors $ap_mirrors"
        ;;
      America/*)
        regional="$us_mirrors"
        others="$eu_mirrors $ap_mirrors"
        ;;
      Asia/* | Australia/* | Pacific/*)
        regional="$ap_mirrors"
        others="$eu_mirrors $us_mirrors"
        ;;
      *)
        regional=""
        others="$eu_mirrors $us_mirrors $ap_mirrors"
        ;;
      esac

      echo 'Acquire::By-Hash "no";' >/etc/apt/apt.conf.d/99no-by-hash

      _try_apt_mirror() {
        local m=$1
        for src in /etc/apt/sources.list.d/debian.sources /etc/apt/sources.list; do
          [[ -f "$src" ]] && sed -i "s|URIs: http[s]*://[^/]*/|URIs: http://${m}/|g; s|deb http[s]*://[^/]*/|deb http://${m}/|g" "$src"
        done
        rm -rf /var/lib/apt/lists/*
        local out
        out=$(apt-get update 2>&1)
        if echo "$out" | grep -qi "hashsum\|hash sum"; then
          msg_warn "Mirror ${m} failed (hash mismatch)"
          return 1
        elif echo "$out" | grep -qi "SSL\|certificate"; then
          msg_warn "Mirror ${m} failed (SSL/certificate error)"
          return 1
        elif echo "$out" | grep -q "^E:"; then
          msg_warn "Mirror ${m} failed (apt-get update error)"
          return 1
        else
          msg_ok "CDN set to ${m}: tests passed"
          return 0
        fi
      }

      _scan_reachable() {
        local result=""
        for m in $1; do
          if timeout 2 bash -c "echo >/dev/tcp/$m/80" 2>/dev/null; then
            result="$result $m"
          fi
        done
        echo "$result" | xargs
      }

      local apt_ok=false

      # Phase 1: Scan global mirrors first (independent of local CDN issues)
      local others_ok
      others_ok=$(_scan_reachable "$others")
      local others_pick
      others_pick=$(printf '%s\n' $others_ok | shuf | head -3 | xargs)

      for mirror in $others_pick; do
        msg_custom "${INFO}" "${YW}" "Attempting mirror: ${mirror}"
        if _try_apt_mirror "$mirror"; then
          apt_ok=true
          break
        fi
      done

      # Phase 2: Try primary mirror
      if [[ "$apt_ok" != true ]]; then
        local primary
        if [[ "$distro" == "ubuntu" ]]; then
          primary="archive.ubuntu.com"
        else
          primary="ftp.debian.org"
        fi
        if timeout 2 bash -c "echo >/dev/tcp/$primary/80" 2>/dev/null; then
          msg_custom "${INFO}" "${YW}" "Attempting mirror: ${primary}"
          if _try_apt_mirror "$primary"; then
            apt_ok=true
          fi
        fi
      fi

      # Phase 3: Fall back to regional mirrors
      if [[ "$apt_ok" != true ]]; then
        local regional_ok
        regional_ok=$(_scan_reachable "$regional")
        local regional_pick
        regional_pick=$(printf '%s\n' $regional_ok | shuf | head -3 | xargs)

        for mirror in $regional_pick; do
          msg_custom "${INFO}" "${YW}" "Attempting mirror: ${mirror}"
          if _try_apt_mirror "$mirror"; then
            apt_ok=true
            break
          fi
        done
      fi

      # Phase 4: All auto mirrors failed, prompt user
      if [[ "$apt_ok" != true ]]; then
        msg_warn "Multiple mirrors failed (possible CDN synchronization issue)."
        if [[ "$distro" == "ubuntu" ]]; then
          msg_warn "Find Ubuntu mirrors at: https://launchpad.net/ubuntu/+archivemirrors"
        else
          msg_warn "Find Debian mirrors at: https://www.debian.org/mirror/list"
        fi
        # Only ask when there is someone to answer: otherwise the loop spins forever.
        local mirror_src
        while ! is_unattended; do
          mirror_src="$(_cs_stdin_source)" || break
          read -rp "  Enter a mirror hostname (or 'skip' to abort): " custom_mirror <"$mirror_src" || break
          [[ -z "$custom_mirror" ]] && continue
          [[ "$custom_mirror" == "skip" ]] && break
          [[ ! "$custom_mirror" =~ ^[a-zA-Z0-9._-]+$ ]] && {
            msg_warn "Invalid hostname format."
            continue
          }
          if _try_apt_mirror "$custom_mirror"; then
            apt_ok=true
            break
          fi
          msg_warn "Mirror '${custom_mirror}' also failed. Try another or type 'skip'."
        done
      fi

      if [[ "$apt_ok" != true ]]; then
        msg_error "All mirrors failed. Check network or try again later."
        return 1
      fi
    fi
    ;;
  apk)
    if ! $STD apk update; then
      msg_warn "apk update failed (dl-cdn.alpinelinux.org), trying alternate mirrors..."
      local alpine_mirrors="mirror.init7.net ftp.halifax.rwth-aachen.de mirrors.edge.kernel.org alpine.mirror.wearetriple.com mirror.leaseweb.com uk.alpinelinux.org dl-2.alpinelinux.org dl-4.alpinelinux.org"
      local apk_ok=false
      # Fall back to the fixed order if shuf is absent: an empty list here would
      # skip every mirror and report "all mirrors failed" without trying one.
      for m in $(printf '%s\n' $alpine_mirrors | shuf 2>/dev/null || printf '%s\n' $alpine_mirrors); do
        if timeout 2 bash -c "echo >/dev/tcp/$m/80" 2>/dev/null; then
          msg_custom "${INFO}" "${YW}" "Attempting mirror: ${m}"
          cat <<EOF >/etc/apk/repositories
http://$m/alpine/latest-stable/main
http://$m/alpine/latest-stable/community
EOF
          if $STD apk update; then
            msg_ok "CDN set to ${m}: tests passed"
            apk_ok=true
            break
          else
            msg_warn "Mirror ${m} failed"
          fi
        fi
      done
      if [[ "$apk_ok" != true ]]; then
        msg_error "All Alpine mirrors failed. Check network or try again later."
        return 1
      fi
    fi
    ;;
  dnf)
    # Speed up DNF: enable parallel downloads if not already configured
    if [[ -f /etc/dnf/dnf.conf ]] && ! grep -q 'max_parallel_downloads' /etc/dnf/dnf.conf; then
      echo 'max_parallel_downloads=10' >>/etc/dnf/dnf.conf
    fi
    # openEuler: default repos point to repo.openeuler.org (China).
    # Pick the fastest reachable mirror based on timezone to avoid cross-continent latency.
    if [[ "${OS_TYPE:-}" == "openeuler" ]] && ls /etc/yum.repos.d/*.repo &>/dev/null 2>&1; then
      if grep -ql 'repo\.openeuler\.org\|repo\.openeuler\.openatom\.cn' /etc/yum.repos.d/*.repo 2>/dev/null; then
        local _oe_tz _oe_mirror _oe_candidates=()
        _oe_tz=$(cat /etc/timezone 2>/dev/null || timedatectl show --property=Timezone --value 2>/dev/null || echo "UTC")
        # Build candidate list, best-first for the region
        case "$_oe_tz" in
        Europe/* | Arctic/*)
          _oe_candidates=(
            "https://ftp.agdsn.de/openeuler/"               # Germany (TU Dresden)
            "https://mirrors.dotsrc.org/openeuler/"         # Denmark
            "https://mirror.accum.se/mirror/openeuler.org/" # Sweden
            "https://ftp.belnet.be/mirror/openeuler/"       # Belgium
          )
          ;;
        America/*)
          # No dedicated Americas mirror yet — European mirrors still beat China
          _oe_candidates=(
            "https://ftp.agdsn.de/openeuler/"
            "https://mirrors.dotsrc.org/openeuler/"
            "https://ftp.belnet.be/mirror/openeuler/"
          )
          ;;
        Asia/Singapore | Asia/Kuala_Lumpur | Asia/Jakarta | Asia/Bangkok | Asia/Ho_Chi_Minh)
          _oe_candidates=(
            "https://mirror.freedif.org/openEuler/"   # Singapore
            "https://linux.domainesia.com/openeuler/" # Indonesia
            "https://mirrors.aliyun.com/openeuler/"   # China (fast in SEA)
          )
          ;;
        Asia/* | Australia/* | Pacific/*)
          _oe_candidates=(
            "https://mirrors.aliyun.com/openeuler/"
            "https://mirrors.huaweicloud.com/openeuler/"
            "https://mirror.freedif.org/openEuler/"
          )
          ;;
        *)
          # Unknown timezone — try EU mirrors before falling back to origin
          _oe_candidates=(
            "https://ftp.agdsn.de/openeuler/"
            "https://mirrors.dotsrc.org/openeuler/"
          )
          ;;
        esac
        # Pick first mirror that responds within 3 s
        _oe_mirror=""
        for _m in "${_oe_candidates[@]}"; do
          if curl -sf --head --max-time 3 "$_m" &>/dev/null; then
            _oe_mirror="$_m"
            break
          fi
        done
        if [[ -n "$_oe_mirror" ]]; then
          sed -i -E \
            "s|https?://repo\.openeuler\.org/|${_oe_mirror}|g;
             s|https?://repo\.openeuler\.openatom\.cn/|${_oe_mirror}|g" \
            /etc/yum.repos.d/*.repo
        fi
      fi
    fi
    $STD dnf makecache
    ;;
  yum)
    $STD yum makecache
    ;;
  zypper)
    $STD zypper refresh
    ;;
  pacman)
    $STD pacman -Sy --noconfirm
    ;;
  emerge)
    $STD emerge --sync
    ;;
  *)
    msg_error "Unknown package manager: $PKG_MANAGER"
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# pkg_upgrade()
#
# Upgrades all installed packages
# ------------------------------------------------------------------------------
pkg_upgrade() {
  # Safety: re-detect if PKG_MANAGER doesn't match available commands
  if [[ "$PKG_MANAGER" == "apt" ]] && ! command -v apt-get &>/dev/null; then
    msg_warn "PKG_MANAGER='apt' but apt-get not found (OS: ${OS_TYPE:-unknown}) — re-detecting"
    detect_os
  fi

  case "$PKG_MANAGER" in
  apt)
    $STD apt-get -o Dpkg::Options::="--force-confold" -y dist-upgrade
    ;;
  apk)
    $STD apk -U upgrade
    ;;
  dnf)
    $STD dnf -y upgrade
    ;;
  yum)
    $STD yum -y update
    ;;
  zypper)
    $STD zypper -n update
    ;;
  pacman)
    $STD pacman -Su --noconfirm
    ;;
  emerge)
    # A full source-based @world rebuild fails under the unprivileged-LXC emerge
    # sandbox ("Operation not permitted") and OOMs a base container. The stage3
    # template is recent enough; the portage tree is already synced in pkg_update.
    # Skip the world rebuild so the base container provisions reliably.
    :
    ;;
  *)
    msg_error "Unknown package manager: $PKG_MANAGER"
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# pkg_install(packages...)
#
# Installs one or more packages
# Arguments:
#   packages - List of packages to install
# ------------------------------------------------------------------------------
pkg_install() {
  local packages=("$@")
  [[ ${#packages[@]} -eq 0 ]] && return 0

  case "$PKG_MANAGER" in
  apt)
    $STD apt-get install -y "${packages[@]}"
    ;;
  apk)
    $STD apk add --no-cache "${packages[@]}"
    ;;
  dnf)
    $STD dnf install -y "${packages[@]}"
    ;;
  yum)
    $STD yum install -y "${packages[@]}"
    ;;
  zypper)
    $STD zypper install -y "${packages[@]}"
    ;;
  pacman)
    $STD pacman -S --noconfirm "${packages[@]}"
    ;;
  emerge)
    $STD emerge --quiet "${packages[@]}"
    ;;
  *)
    msg_error "Unknown package manager: $PKG_MANAGER"
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# pkg_remove(packages...)
#
# Removes one or more packages
# ------------------------------------------------------------------------------
pkg_remove() {
  local packages=("$@")
  [[ ${#packages[@]} -eq 0 ]] && return 0

  case "$PKG_MANAGER" in
  apt)
    $STD apt-get remove -y "${packages[@]}"
    ;;
  apk)
    $STD apk del "${packages[@]}"
    ;;
  dnf)
    $STD dnf remove -y "${packages[@]}"
    ;;
  yum)
    $STD yum remove -y "${packages[@]}"
    ;;
  zypper)
    $STD zypper remove -y "${packages[@]}"
    ;;
  pacman)
    $STD pacman -R --noconfirm "${packages[@]}"
    ;;
  emerge)
    $STD emerge --quiet --unmerge "${packages[@]}"
    ;;
  *)
    msg_error "Unknown package manager: $PKG_MANAGER"
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# pkg_clean()
#
# Cleans package manager cache to free space
# ------------------------------------------------------------------------------
pkg_clean() {
  case "$PKG_MANAGER" in
  apt)
    $STD apt-get autoremove -y
    $STD apt-get autoclean
    ;;
  apk)
    $STD apk cache clean
    ;;
  dnf)
    $STD dnf autoremove -y
    $STD dnf clean all
    ;;
  yum)
    $STD yum clean all
    ;;
  zypper)
    $STD zypper clean
    ;;
  pacman)
    $STD pacman -Sc --noconfirm
    ;;
  emerge)
    # Skip depclean on a base container: it requires a full @world update first
    # (which we skip) and can unmerge needed packages or fail ("Operation not
    # permitted") under the unprivileged-LXC emerge sandbox.
    :
    ;;
  *)
    return 0
    ;;
  esac
}

# ==============================================================================
# SECTION 3: SERVICE/INIT SYSTEM ABSTRACTION
# ==============================================================================

# ------------------------------------------------------------------------------
# svc_enable(service)
#
# Enables a service to start at boot
# ------------------------------------------------------------------------------
svc_enable() {
  local service="$1"
  [[ -z "$service" ]] && return 1

  case "$INIT_SYSTEM" in
  systemd)
    $STD systemctl enable "$service"
    ;;
  openrc)
    $STD rc-update add "$service" default
    ;;
  sysvinit)
    if command -v update-rc.d &>/dev/null; then
      $STD update-rc.d "$service" defaults
    elif command -v chkconfig &>/dev/null; then
      $STD chkconfig "$service" on
    fi
    ;;
  *)
    msg_warn "Unknown init system, cannot enable $service"
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# svc_disable(service)
#
# Disables a service from starting at boot
# ------------------------------------------------------------------------------
svc_disable() {
  local service="$1"
  [[ -z "$service" ]] && return 1

  case "$INIT_SYSTEM" in
  systemd)
    $STD systemctl disable "$service"
    ;;
  openrc)
    $STD rc-update del "$service" default 2>/dev/null || true
    ;;
  sysvinit)
    if command -v update-rc.d &>/dev/null; then
      $STD update-rc.d "$service" remove
    elif command -v chkconfig &>/dev/null; then
      $STD chkconfig "$service" off
    fi
    ;;
  *)
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# svc_start(service)
#
# Starts a service immediately
# ------------------------------------------------------------------------------
svc_start() {
  local service="$1"
  [[ -z "$service" ]] && return 1

  case "$INIT_SYSTEM" in
  systemd)
    $STD systemctl start "$service"
    ;;
  openrc)
    $STD rc-service "$service" start
    ;;
  sysvinit)
    $STD /etc/init.d/"$service" start
    ;;
  *)
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# svc_stop(service)
#
# Stops a running service
# ------------------------------------------------------------------------------
svc_stop() {
  local service="$1"
  [[ -z "$service" ]] && return 1

  case "$INIT_SYSTEM" in
  systemd)
    $STD systemctl stop "$service"
    ;;
  openrc)
    $STD rc-service "$service" stop
    ;;
  sysvinit)
    $STD /etc/init.d/"$service" stop
    ;;
  *)
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# svc_restart(service)
#
# Restarts a service
# ------------------------------------------------------------------------------
svc_restart() {
  local service="$1"
  [[ -z "$service" ]] && return 1

  case "$INIT_SYSTEM" in
  systemd)
    $STD systemctl restart "$service"
    ;;
  openrc)
    $STD rc-service "$service" restart
    ;;
  sysvinit)
    $STD /etc/init.d/"$service" restart
    ;;
  *)
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# svc_status(service)
#
# Gets service status (returns 0 if running)
# ------------------------------------------------------------------------------
svc_status() {
  local service="$1"
  [[ -z "$service" ]] && return 1

  case "$INIT_SYSTEM" in
  systemd)
    systemctl is-active --quiet "$service"
    ;;
  openrc)
    rc-service "$service" status &>/dev/null
    ;;
  sysvinit)
    /etc/init.d/"$service" status &>/dev/null
    ;;
  *)
    return 1
    ;;
  esac
}

# ------------------------------------------------------------------------------
# svc_reload_daemon()
#
# Reloads init system daemon configuration (for systemd)
# ------------------------------------------------------------------------------
svc_reload_daemon() {
  case "$INIT_SYSTEM" in
  systemd)
    $STD systemctl daemon-reload
    ;;
  *)
    # Other init systems don't need this
    return 0
    ;;
  esac
}

# ==============================================================================
# SECTION 4: NETWORK & CONNECTIVITY
# ==============================================================================

# ------------------------------------------------------------------------------
# get_ip()
#
# Gets the primary IPv4 address of the container
# Returns: IP address string
# ------------------------------------------------------------------------------
get_ip() {
  local ip=""

  # Try hostname -I first (most common)
  if command -v hostname &>/dev/null; then
    ip=$(hostname -I 2>/dev/null | awk '{print $1}' || true)
  fi

  # Fallback to ip command
  if [[ -z "$ip" ]] && command -v ip &>/dev/null; then
    ip=$(ip -4 addr show scope global | awk '/inet /{print $2}' | cut -d/ -f1 | head -1)
  fi

  # Fallback to ifconfig
  if [[ -z "$ip" ]] && command -v ifconfig &>/dev/null; then
    ip=$(ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1' | head -1)
  fi

  echo "$ip"
}

# ------------------------------------------------------------------------------
# verb_ip6()
#
# Configures IPv6 based on IPV6_METHOD variable
# If IPV6_METHOD=disable: disables IPv6 via sysctl
# ------------------------------------------------------------------------------
verb_ip6() {
  set_std_mode # Set STD mode based on VERBOSE

  if [[ "${IPV6_METHOD:-}" == "disable" ]]; then
    if [[ ! -d /proc/sys/net/ipv6 ]]; then
      msg_ok "IPv6 is already disabled by the host kernel"
      return 0
    fi
    msg_info "Disabling IPv6 (this may affect some services)"
    mkdir -p /etc/sysctl.d
    cat >/etc/sysctl.d/99-disable-ipv6.conf <<EOF
# Disable IPv6 (set by community-scripts)
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
EOF
    $STD sysctl -p /etc/sysctl.d/99-disable-ipv6.conf

    # For OpenRC, ensure sysctl runs at boot
    if [[ "$INIT_SYSTEM" == "openrc" ]]; then
      $STD rc-update add sysctl default 2>/dev/null || true
    fi
    msg_ok "Disabled IPv6"
  fi
}

# ------------------------------------------------------------------------------
# setting_up_container()
#
# Initial container setup:
#   - Verifies network connectivity
#   - Removes Python EXTERNALLY-MANAGED restrictions
#   - Disables network wait services
# ------------------------------------------------------------------------------
setting_up_container() {
  msg_info "Setting up Container OS"

  # Fix Debian 13 LXC template bug where / is owned by nobody
  # Only attempt in privileged containers (unprivileged cannot chown /)
  if [[ "$(stat -c '%U' /)" != "root" ]]; then
    (chown root:root / 2>/dev/null) || true
  fi

  # apt fetches as the _apt user, so /etc without o+x means _apt cannot reach
  # resolv.conf: root pings fine while apt reports "Temporary failure resolving".
  # A host umask of 027 leaves new containers like this; the PVE GUI's own
  # containers get 755, so it is collateral rather than intent.
  local _etc_mode
  _etc_mode="$(stat -c '%a' /etc 2>/dev/null || echo 755)"
  if [[ "$_etc_mode" =~ ^[0-7]+$ ]] && (( (8#$_etc_mode & 1) == 0 )); then
    chmod o+x /etc 2>/dev/null || true
    msg_warn "/etc was ${_etc_mode}, which stops apt and every other service resolving names - set to $(stat -c '%a' /etc)"
  fi

  # Debian records the zone name in /etc/timezone, and install scripts read it
  # (immich, tracearr). PVE templates ship it, the linuxcontainers images used
  # on Incus ship only the /etc/localtime symlink - so `cat /etc/timezone`
  # aborted the install after everything else had already been built. Only
  # fills the gap: where the file exists, nothing here runs.
  if [[ ! -s /etc/timezone ]]; then
    local _tz="${tz:-}"
    if [[ -n "$_tz" && "$_tz" != "host" && -f "/usr/share/zoneinfo/$_tz" ]]; then
      ln -sf "/usr/share/zoneinfo/$_tz" /etc/localtime 2>/dev/null || true
    else
      _tz="$(readlink -f /etc/localtime 2>/dev/null | sed -n 's#.*/zoneinfo/##p')"
      [[ -z "$_tz" ]] && _tz="Etc/UTC"
    fi
    echo "$_tz" >/etc/timezone 2>/dev/null || true
  fi

  # Wait for network
  local i
  for ((i = RETRY_NUM; i > 0; i--)); do
    if [[ -n "$(get_ip)" ]]; then
      break
    fi
    echo 1>&2 -en "${CROSS}${RD} No Network! "
    sleep "$RETRY_EVERY"
  done

  if [[ -z "$(get_ip)" ]]; then
    echo 1>&2 -e "\n${CROSS}${RD} No Network After $RETRY_NUM Tries${CL}"
    echo -e "${NETWORK}Check Network Settings"
    exit 1
  fi

  # Remove Python EXTERNALLY-MANAGED restriction (Debian 12+, Ubuntu 23.04+)
  rm -rf /usr/lib/python3.*/EXTERNALLY-MANAGED 2>/dev/null || true

  # Fix locale warnings from perl/apt (e.g. Devuan inherits host locale but hasn't generated it)
  # C.UTF-8 is always available without locale-gen on any Linux system
  if [[ "$PKG_MANAGER" == "apt" ]]; then
    export DEBIAN_FRONTEND=noninteractive
    export LC_ALL=C.UTF-8
    export LANG=C.UTF-8
    export LANGUAGE=C.UTF-8
    grep -qxF 'LC_ALL=C.UTF-8' /etc/environment 2>/dev/null || echo -e 'LC_ALL=C.UTF-8\nLANG=C.UTF-8' >>/etc/environment
  fi

  # Arch Linux: pacman 7+ uses Landlock sandboxing for the 'alpm' user, which
  # requires kernel features unavailable in unprivileged LXC containers.
  # Disabling DownloadUser falls back to running as root (safe inside an LXC).
  if [[ "$PKG_MANAGER" == "pacman" && -f /etc/pacman.conf ]]; then
    sed -i 's/^\s*DownloadUser\s*=.*/#&/' /etc/pacman.conf
    grep -q '^DisableSandbox' /etc/pacman.conf || sed -i '/^\[options\]/a DisableSandbox' /etc/pacman.conf

    # Initialize pacman keyring (required for signature verification on first
    # upgrade). The Arch base template ships without an initialized keyring.
    if [[ ! -f /etc/pacman.d/gnupg/pubring.gpg ]] || [[ ! -s /etc/pacman.d/gnupg/pubring.gpg ]]; then
      $STD pacman-key --init
      $STD pacman-key --populate
    fi
  fi

  # Disable network wait services for faster boot
  case "$INIT_SYSTEM" in
  systemd)
    systemctl disable -q --now systemd-networkd-wait-online.service 2>/dev/null || true
    ;;
  esac

  msg_ok "Set up Container OS"
  msg_ok "Network Connected: ${BL}$(get_ip)"
  post_progress_to_api
}

# ------------------------------------------------------------------------------
# network_check()
#
# Comprehensive network connectivity check for IPv4 and IPv6
# Tests connectivity to DNS servers and verifies DNS resolution
# ------------------------------------------------------------------------------
network_check() {
  set +e
  trap - ERR
  local ipv4_connected=false
  local ipv6_connected=false
  sleep 1

  # ICMP is not connectivity. A firewall that permits outbound 80/443 and drops
  # ping is an ordinary setup, and apt works perfectly behind it -- one reporter
  # watched this branch condemn a container while the DNS check below resolved
  # deb.debian.org without complaint. Ping first because it is fast, then ask
  # the question that matters: can we reach what an install actually needs?
  _net_tcp_reachable() {
    local hp host port
    for hp in "deb.debian.org 443" "github.com 443" "1.1.1.1 443"; do
      host="${hp% *}"
      port="${hp#* }"
      timeout 3 bash -c "exec 3<>/dev/tcp/${host}/${port}" 2>/dev/null && return 0
    done
    return 1
  }

  if ping -c 1 -W 1 1.1.1.1 &>/dev/null || ping -c 1 -W 1 8.8.8.8 &>/dev/null || ping -c 1 -W 1 9.9.9.9 &>/dev/null; then
    msg_ok "IPv4 Internet Connected"
    ipv4_connected=true
  elif _net_tcp_reachable; then
    msg_ok "IPv4 Internet Connected (TCP reachable; ICMP is filtered)"
    ipv4_connected=true
  else
    msg_error "IPv4 Internet Not Connected"
  fi

  # Debian's iputils no longer ships a ping6 binary; and missing IPv6 is not an error.
  local -a _ping6=(ping6)
  command -v ping6 &>/dev/null || _ping6=(ping -6)
  if "${_ping6[@]}" -c 1 -W 1 2606:4700:4700::1111 &>/dev/null || "${_ping6[@]}" -c 1 -W 1 2001:4860:4860::8888 &>/dev/null || "${_ping6[@]}" -c 1 -W 1 2620:fe::fe &>/dev/null; then
    msg_ok "IPv6 Internet Connected"
    ipv6_connected=true
  else
    msg_custom "ℹ️" "${YW}" "No IPv6 Internet (IPv4 is enough)"
  fi

  # If both IPv4 and IPv6 checks fail, prompt the user
  if [[ $ipv4_connected == false && $ipv6_connected == false ]]; then
    # The installer runs under lxc-attach, where stdin is never a terminal, so
    # this question cannot be asked here at all -- prompt_confirm applied its
    # "n" default and the exit was reported as "user declined to continue" to
    # people who were never asked. The host already decided to continue after
    # its own failed test; contradicting that by destroying the container is the
    # wrong way to resolve a question nobody could answer.
    if [[ ! -t 0 ]]; then
      msg_warn "No Internet detected and no terminal to ask - continuing anyway"
      echo -e "${INFO}${RD}Expect Issues Without Internet${CL}"
    elif prompt_confirm "No Internet detected, would you like to continue anyway?" "n"; then
      echo -e "${INFO}${RD}Expect Issues Without Internet${CL}"
    else
      echo -e "${NETWORK}Check Network Settings"
      exit 122
    fi
  fi

  # DNS resolution checks for GitHub-related domains (IPv4 and/or IPv6)
  local GIT_HOSTS=("github.com" "raw.githubusercontent.com" "api.github.com")
  local GIT_STATUS="Git DNS:"
  local DNS_FAILED=false

  for HOST in "${GIT_HOSTS[@]}"; do
    local RESOLVEDIP
    RESOLVEDIP=$(getent hosts "$HOST" 2>/dev/null | awk '{ print $1 }' | grep -E '(^([0-9]{1,3}\.){3}[0-9]{1,3}$)|(^[a-fA-F0-9:]+$)' | head -n1)
    if [[ -z "$RESOLVEDIP" ]]; then
      GIT_STATUS+="$HOST:(${DNSFAIL:-FAIL})"
      DNS_FAILED=true
    else
      GIT_STATUS+=" $HOST:(${DNSOK:-OK})"
    fi
  done

  if [[ "$DNS_FAILED" == true ]]; then
    fatal "$GIT_STATUS"
  else
    msg_ok "$GIT_STATUS"
  fi

  # Verify APT repository DNS resolution (detect Tailscale MagicDNS / broken resolver)
  if command -v apt-get &>/dev/null; then
    local APT_DNS_OK=true
    for REPO_HOST in "deb.debian.org" "archive.ubuntu.com"; do
      if ! getent hosts "$REPO_HOST" &>/dev/null; then
        APT_DNS_OK=false
        break
      fi
    done
    if [[ "$APT_DNS_OK" == false ]]; then
      msg_warn "APT repository DNS resolution failed, injecting public DNS servers"
      echo -e "nameserver 8.8.8.8\nnameserver 1.1.1.1" >/etc/resolv.conf
    fi
  fi

  set -e
  trap 'error_handler' ERR
}

# ==============================================================================
# SECTION 5: OS UPDATE & PACKAGE MANAGEMENT
# ==============================================================================

# ------------------------------------------------------------------------------
# update_os()
#
# Updates container OS and sources appropriate tools.func
# ------------------------------------------------------------------------------
update_os() {
  msg_info "Updating Container OS"
  configure_http_proxy

  # Configure APT cacher proxy if enabled (Debian/Ubuntu only)
  if [[ "$PKG_MANAGER" == "apt" && "${CACHER:-}" == "yes" && -z "${HTTP_PROXY:-${http_proxy:-}}" ]]; then
    echo 'Acquire::http::Proxy-Auto-Detect "/usr/local/bin/apt-proxy-detect.sh";' >/etc/apt/apt.conf.d/00aptproxy
    local _proxy_raw="${CACHER_IP}"
    local _proxy_host _proxy_port _proxy_url
    # Parse host and port from URL or plain IP/hostname
    _proxy_host=$(echo "$_proxy_raw" | sed -e 's|https\?://||' -e 's|/.*||' | cut -d: -f1)
    _proxy_port=$(echo "$_proxy_raw" | sed -e 's|https\?://||' -e 's|/.*||' | cut -s -d: -f2)
    if [[ "$_proxy_raw" =~ ^https?:// ]]; then
      # Full URL provided — use as-is for proxy output, extract port for nc check
      _proxy_url="$_proxy_raw"
      _proxy_port="${_proxy_port:-80}"
    else
      # Legacy: plain IP or hostname — default to http + port 3142
      _proxy_port="${_proxy_port:-3142}"
      _proxy_url="http://${_proxy_raw}:${_proxy_port}"
    fi
    cat <<EOF >/usr/local/bin/apt-proxy-detect.sh
#!/bin/bash
if nc -w1 -z "${_proxy_host}" ${_proxy_port}; then
  echo -n "${_proxy_url}"
else
  echo -n "DIRECT"
fi
EOF
    chmod +x /usr/local/bin/apt-proxy-detect.sh
  fi

  # Re-detect OS to ensure PKG_MANAGER is correct (guards against stale env)
  detect_os

  # Update and upgrade
  pkg_update
  pkg_upgrade

  # PID 1 pins its executor at boot; a systemd upgrade removes the
  # libsystemd-shared that pinned binary links against, and every service
  # start then exits 127 (journald, getty) until PID 1 re-executes. Debian's
  # postinst only tries via deb-systemd-invoke, which policy-rc.d can veto.
  if [[ -d /run/systemd/system && "$(readlink /proc/1/exe 2>/dev/null)" == *"(deleted)"* ]]; then
    systemctl daemon-reexec &>/dev/null || true
    systemctl reset-failed &>/dev/null || true
    systemctl start systemd-journald.service &>/dev/null || true
  fi

  # Remove Python EXTERNALLY-MANAGED restriction
  rm -rf /usr/lib/python3.*/EXTERNALLY-MANAGED 2>/dev/null || true

  msg_ok "Updated Container OS"
  post_progress_to_api

  # Source appropriate tools.func based on OS. Fetch with curl OR wget: Gentoo
  # stage3 ships wget but not curl (the curl bootstrap can fall back to wget and
  # leave curl absent), so a hard curl call fails with "command not found".
  local tools_content tools_name
  case "$OS_FAMILY" in
  alpine) tools_name="lib/alpine.func" ;;
  *) tools_name="lib/tools.func" ;;
  esac
  if [[ -n "${COMMUNITY_SCRIPTS_CORE_DIR:-}" && -s "${COMMUNITY_SCRIPTS_CORE_DIR}/${tools_name}" ]]; then
    source "${COMMUNITY_SCRIPTS_CORE_DIR}/${tools_name}"
  else
    tools_content=$(_cs_engine_read "${tools_name}")
    if [[ -z "$tools_content" ]]; then
      msg_error "Failed to download ${tools_name}"
      exit 115
    fi
    source /dev/stdin <<<"$tools_content"
  fi
  if ! declare -f fetch_and_deploy_gh_release >/dev/null 2>&1; then
    msg_error "tools.func loaded but incomplete — missing expected functions"
    exit 115
  fi
}

# ==============================================================================
# SECTION 6: MOTD & SSH CONFIGURATION
# ==============================================================================

# ------------------------------------------------------------------------------
# motd_ssh()
#
# Configures Message of the Day and SSH settings
# ------------------------------------------------------------------------------
motd_ssh() {
  # Set 256-color mode only for SSH sessions; LXC console gets TERM from agetty.
  # Forcing TERM=xterm-256color on the LXC noVNC console can break readline's
  # window-size detection and cause CSI 6n response leaks ("R;80R" garbage).
  if ! grep -q '__cs_term_setup' /root/.bashrc 2>/dev/null; then
    cat >>/root/.bashrc <<'EOF'

# __cs_term_setup: community-scripts terminal init
if [ -n "${SSH_CONNECTION:-}${SSH_TTY:-}" ]; then
  export TERM='xterm-256color'
fi
EOF
  fi

  # For LXC login shells (bash_profile runs before readline initialises):
  # lock TERM=linux on the physical console so readline never queries CPR.
  # This must run in bash_profile, not bashrc, because login shells source
  # bash_profile first — readline reads TERM before any profile.d script runs.
  if ! grep -q '__cs_console_term' /root/.bash_profile 2>/dev/null; then
    cat >>/root/.bash_profile <<'EOF'

# __cs_console_term: lock TERM=linux on LXC noVNC console to prevent R;80R garbage
# (readline 8.2+ sends ESC[6n if TERM supports CPR; linux terminfo has no CPR cap)
if [ -z "${SSH_CONNECTION:-}${SSH_TTY:-}" ]; then
  _ct=$(tty 2>/dev/null)
  case "$_ct" in
    /dev/console|/dev/tty[0-9]*)
      export TERM=linux ;;
  esac
  unset _ct

  # readline 8.3 emits a cursor-position query (ESC[6n) on the noVNC console
  # whose response leaks into the prompt as "R;80R". TERM=linux does not stop it
  # on Fedora 43 / Arch, so drain pending input at login, before each prompt and
  # on window resize.
  case "$-" in
  *i*)
    __cs_drain() {
      local _j
      while IFS= read -rst 0.06 -N 128 _j 2>/dev/null; do :; done
    }
    __cs_drain
    trap '__cs_drain' WINCH
    case "${PROMPT_COMMAND:-}" in
    *__cs_drain*) : ;;
    *) PROMPT_COMMAND="__cs_drain${PROMPT_COMMAND:+;$PROMPT_COMMAND}" ;;
    esac
    ;;
  esac
fi
EOF
  fi

  # No & or \: update_motd_ip puts this into a sed replacement.
  local os_line='$(if [ -r /etc/os-release ]; then . /etc/os-release; fi; echo "${NAME:-Linux} - Version: ${VERSION_ID:-rolling}")'

  # Create MOTD profile script. The testing block is conditional -- printed
  # unconditionally it told every Incus container it was a DevScripts build.
  local PROFILE_FILE="/etc/profile.d/00_lxc-details.sh"
  cat >"$PROFILE_FILE" <<EOF
[ -z "\${SSH_CONNECTION:-}\${SSH_TTY:-}" ] && [ -t 1 ] && printf '\033[3J\033[H\033[2J'
echo ""
EOF

  # A script that names a feedback thread does not name a repository: it may
  # already have been promoted out of DevScripts and still be collecting
  # feedback, and saying "DevScripts" there would be wrong.
  if [[ -n "${CS_TESTING_URL:-}" ]]; then
    cat >>"$PROFILE_FILE" <<EOF
echo -e "${BOLD:-}${YW:-}${APPLICATION:-Container} LXC Container - TESTING BUILD${CL:-}"
echo -e "${RD:-}This script is still being tested. Without feedback it cannot be finished.${CL:-}"
EOF
  elif [[ "${CS_TESTING:-}" == "yes" ]]; then
    cat >>"$PROFILE_FILE" <<EOF
echo -e "${BOLD:-}${YW:-}${APPLICATION:-Container} LXC Container - DEV Repository${CL:-}"
echo -e "${RD:-}WARNING: This is a DEVELOPMENT version (DevScripts). Do NOT use in production!${CL:-}"
EOF
  else
    cat >>"$PROFILE_FILE" <<EOF
echo -e "${BOLD:-}${YW:-}${APPLICATION:-Container} LXC Container${CL:-}"
EOF
  fi

  cat >>"$PROFILE_FILE" <<EOF
echo -e "${GATEWAY:-}${YW:-}Provided by: ${GN:-}community-scripts ORG ${YW:-}| GitHub: ${GN:-}https://github.com/community-scripts/ProxmoxVE${CL:-}"
echo ""
echo -e "${OS:-}${YW:-}OS: ${GN:-}${os_line}${CL:-}"
echo -e "${HOSTNAME:-}${YW:-}Hostname: ${GN:-}\$(uname -n)${CL:-}"
echo -e "${INFO:-}${YW:-}IP Address: ${GN:-}\$(ip -4 route get 1 2>/dev/null | sed -n 's/.* src \\([0-9.]\\+\\).*/\\1/p' | head -1)${CL:-}"
EOF

  if [[ -n "${CS_TESTING_URL:-}" ]]; then
    cat >>"$PROFILE_FILE" <<EOF
echo ""
echo -e "${YW:-} Report back: ${GN:-}${CS_TESTING_URL}${CL:-}"
echo -e "${YW:-} Works, broken, or anything odd - one line is enough.${CL:-}"
EOF
  elif [[ "${CS_TESTING:-}" == "yes" ]]; then
    cat >>"$PROFILE_FILE" <<EOF
echo -e "${YW:-} Repository: ${GN:-}https://github.com/community-scripts/DevScripts${CL:-}"
EOF
  fi

  cat >>"$PROFILE_FILE" <<EOF
echo ""
EOF
  # openSUSE's /etc/bash.bashrc sources profile.d via `[ -x ]`, not `[ -r ]`,
  # so the MOTD script must be executable to be loaded on every distro.
  chmod +x "$PROFILE_FILE"

  # Also a static /etc/motd: pam_motd reads it on every login regardless of how
  # profile.d is sourced. Static fields only, the dynamic ones come from the
  # profile.d script above.
  if [[ -n "${CS_TESTING_URL:-}" ]]; then
    cat >/etc/motd <<EOF

${APPLICATION:-Container} LXC Container - TESTING BUILD
This script is still being tested. Without feedback it cannot be finished.

 Report back: ${CS_TESTING_URL}
 Works, broken, or anything odd - one line is enough.

EOF
  elif [[ "${CS_TESTING:-}" == "yes" ]]; then
    cat >/etc/motd <<EOF

${APPLICATION:-Container} LXC Container - DEV Repository
WARNING: This is a DEVELOPMENT version (DevScripts). Do NOT use in production!
 Repository: https://github.com/community-scripts/DevScripts

EOF
  else
    cat >/etc/motd <<EOF

${APPLICATION:-Container} LXC Container

EOF
  fi

  # Disable default MOTD scripts (Debian/Ubuntu)
  [[ -d /etc/update-motd.d ]] && chmod -x /etc/update-motd.d/* 2>/dev/null || true

  # Configure SSH root access if requested
  if [[ "${SSH_ROOT:-}" == "yes" ]]; then
    # Ensure SSH server is installed
    if [[ ! -f /etc/ssh/sshd_config ]]; then
      msg_info "Installing SSH server"
      case "$PKG_MANAGER" in
      apt)
        pkg_install openssh-server
        ;;
      apk)
        pkg_install openssh
        rc-update add sshd default 2>/dev/null || true
        ;;
      dnf | yum)
        pkg_install openssh-server
        ;;
      zypper)
        pkg_install openssh
        ;;
      pacman)
        pkg_install openssh
        ;;
      emerge)
        pkg_install net-misc/openssh
        ;;
      esac
      msg_ok "Installed SSH server"
    fi

    local sshd_config="/etc/ssh/sshd_config"
    if [[ -f "$sshd_config" ]]; then
      sed -i "s/#PermitRootLogin prohibit-password/PermitRootLogin yes/g" "$sshd_config"
      sed -i "s/PermitRootLogin prohibit-password/PermitRootLogin yes/g" "$sshd_config"

      case "$INIT_SYSTEM" in
      systemd)
        svc_restart sshd 2>/dev/null || svc_restart ssh 2>/dev/null || true
        ;;
      openrc)
        svc_enable sshd 2>/dev/null || true
        svc_start sshd 2>/dev/null || true
        ;;
      *)
        svc_restart sshd 2>/dev/null || true
        ;;
      esac
    fi
  fi
  post_progress_to_api
}

# ==============================================================================
# SECTION 7: CONTAINER CUSTOMIZATION
# ==============================================================================

# ------------------------------------------------------------------------------
# customize()
#
# Customizes container for passwordless login and creates update script
# ------------------------------------------------------------------------------
customize() {
  # debugfs and configfs belong to the host, so an unprivileged container is
  # refused and boots degraded. Proxmox's Debian and Ubuntu templates mask them
  # already; the others (openSUSE, linuxcontainers.org images) do not.
  if [[ "$INIT_SYSTEM" == "systemd" ]]; then
    local _unit
    for _unit in sys-kernel-debug.mount sys-kernel-config.mount sys-kernel-tracing.mount; do
      if systemctl is-failed --quiet "$_unit" 2>/dev/null; then
        systemctl mask "$_unit" &>/dev/null || true
        systemctl reset-failed "$_unit" &>/dev/null || true
      fi
    done
    # netplan-configure (Ubuntu 26.04) reloads udev after writing its config,
    # and an unprivileged container has no udev to reload.
    if systemctl is-failed --quiet netplan-configure.service 2>/dev/null; then
      mkdir -p /etc/systemd/system/netplan-configure.service.d
      cat >/etc/systemd/system/netplan-configure.service.d/no-udev.conf <<'EOF'
[Service]
ExecStartPost=
ExecStartPost=-udevadm control --reload
ExecStartPost=-udevadm trigger --action=add --subsystem-match=net
EOF
      systemctl daemon-reload &>/dev/null || true
      systemctl reset-failed netplan-configure.service &>/dev/null || true
    fi
  fi

  if [[ "${PASSWORD:-}" == "" ]]; then
    msg_info "Customizing Container"

    # Remove root password for auto-login
    passwd -d root &>/dev/null || true

    case "$INIT_SYSTEM" in
    systemd)
      # Mask services that block boot in LXC containers
      # systemd-homed-firstboot.service hangs waiting for user input on Fedora
      systemctl mask systemd-homed-firstboot.service &>/dev/null || true
      systemctl mask systemd-homed.service &>/dev/null || true

      # In LXC there are TWO possible getty paths:
      #   - container-getty@1.service  -> /dev/tty1 (Proxmox web noVNC console)
      #   - console-getty.service       -> /dev/console (pct console / serial)
      # We configure both with --autologin --noissue (prevents banner spam from
      # rapid respawns) so whichever one the user opens works.
      # No --noclear: agetty clears tty1 before autologin so leftover boot output
      # (Fedora 43 systemd prints to the console) doesn't leave a big blank gap
      # above the login. --noissue keeps it from reprinting the issue on respawn.
      local _agetty_opts='--autologin root --noissue --keep-baud'

      # container-getty@ hands agetty its pty as stdin (TTYPath=/dev/pts/%I,
      # since systemd 252), so the line is "-" exactly like the stock unit; on
      # Proxmox the instances are pts/1 and pts/2, i.e. tty1 and tty2. The
      # override covers every instance. TERM=linux keeps readline from probing.
      # A dead getty leaves systemd's own size probe (ESC[6n) echoing on the
      # console as "24;80R"; the cause of the death was the executor, see update_os.
      if [[ -f /usr/lib/systemd/system/container-getty@.service ]]; then
        rm -f /etc/systemd/system/container-getty@1.service.d/override.conf
        rmdir /etc/systemd/system/container-getty@1.service.d 2>/dev/null || true
        mkdir -p /etc/systemd/system/container-getty@.service.d
        cat >/etc/systemd/system/container-getty@.service.d/override.conf <<EOF
[Service]
Environment=TERM=linux
ExecStart=
ExecStart=-/sbin/agetty ${_agetty_opts} - 115200,38400,9600 linux
EOF
      fi

      if [[ -f /usr/lib/systemd/system/console-getty.service ]]; then
        # LXC's drop-in of the same name in /run has agetty open the console
        # itself, because systemd 258+ cannot set /dev/console up as stdin in a
        # container. Ours replaces it, so it has to keep doing that.
        local _console_port="-" _console_stdio=""
        if grep -qs '^StandardInput=null' /run/systemd/system/console-getty.service.d/override.conf; then
          _console_port="console"
          _console_stdio=$'StandardInput=null\nStandardOutput=null'
        fi
        mkdir -p /etc/systemd/system/console-getty.service.d
        cat >/etc/systemd/system/console-getty.service.d/override.conf <<EOF
[Service]
Environment=TERM=linux
ExecStart=
ExecStart=-/sbin/agetty ${_agetty_opts} 115200,38400,9600 ${_console_port} linux
${_console_stdio}
EOF
        # Enable console-getty for pct console (not enabled by default on Fedora/RHEL)
        systemctl enable console-getty.service &>/dev/null || true
      fi

      # Fedora/RHEL: /etc/profile.d/vte*.sh sets a PROMPT_COMMAND that, combined
      # with broken TIOCGWINSZ in LXC noVNC, causes CSI 6n responses to leak as
      # "R;80R" garbage at the shell prompt. Disable by renaming (chmod -x is
      # ineffective; /etc/profile sources by readability, not executable bit).
      # Versioned names exist on Fedora 43+ (vte-2.91.sh).
      shopt -s nullglob
      for _f in /etc/profile.d/vte*.sh /etc/profile.d/vte*.csh; do
        mv "$_f" "${_f}.disabled" 2>/dev/null || true
      done
      shopt -u nullglob

      # LXC pseudo-tty often reports winsize 0x0; bash readline then falls back
      # to CSI 6n cursor-position queries whose responses leak as input.
      # Setting COLUMNS/LINES + stty makes readline skip the query entirely.
      cat >/etc/profile.d/00-lxc-term-size.sh <<'EOF'
# community-scripts: ensure sane terminal size in LXC console
if [ -t 0 ] && [ -t 1 ]; then
  _sz=$(stty size 2>/dev/null)
  if [ -z "$_sz" ] || [ "${_sz% *}" = "0" ]; then
    stty rows 24 cols 80 2>/dev/null
    export LINES=24 COLUMNS=80
  fi
  unset _sz
fi
EOF
      chmod +x /etc/profile.d/00-lxc-term-size.sh

      systemctl daemon-reload
      # Each instance owns its own pty; a failed one (Kali) needs reset-failed first.
      systemctl reset-failed 'container-getty@*.service' &>/dev/null || true
      # The instances come from container_ttys (pts/1 pts/2 on Proxmox, i.e.
      # tty1 and tty2); a dead one is unloaded and no glob finds it, so name each.
      local _t
      for _t in $(tr '\0' '\n' </proc/1/environ 2>/dev/null | sed -n 's/^container_ttys=//p'); do
        systemctl restart "container-getty@${_t#pts/}.service" &>/dev/null || true
      done
      systemctl is-active console-getty.service &>/dev/null && systemctl restart console-getty.service &>/dev/null || true
      touch /root/.hushlogin
      ;;

    openrc)
      # Alpine ships BusyBox getty, not agetty, and the rewrite below names
      # /sbin/agetty explicitly. Without util-linux the new inittab line points
      # at a binary that does not exist and the console never comes back.
      # --force-broken-world: the minirootfs world file can disagree with what is
      # actually installed, which would otherwise abort the add.
      if [[ "$PKG_MANAGER" == "apk" ]] && ! command -v agetty &>/dev/null; then
        $STD apk add --no-cache --force-broken-world util-linux || true
      fi

      # Alpine/Gentoo inittab formats differ: Alpine uses
      #   "tty1::respawn:/sbin/getty 38400 tty1"
      # Gentoo uses
      #   "1::respawn:/sbin/agetty 38400 tty1"
      # Match any respawn line running a getty/agetty on tty1 (resp. console) and
      # rewrite it with --autologin, preserving the original inittab id.
      if [[ -f /etc/inittab ]]; then
        if command -v agetty &>/dev/null; then
          # Re-applied on every boot: a one-time edit does not survive one, which
          # is why autologin worked on a fresh container and was gone afterwards.
          mkdir -p /etc/local.d
          cat >/etc/local.d/autologin.start <<'EOF'
#!/bin/sh
sed -i -E 's#^([A-Za-z0-9]*:[0-9]*:respawn:).*[ag]etty.*tty1.*#\1/sbin/agetty --autologin root --noclear tty1 38400 linux#' /etc/inittab
sed -i -E 's#^([A-Za-z0-9]*:[0-9]*:respawn:).*[ag]etty.*console.*#\1/sbin/agetty --autologin root --noclear console 115200 linux#' /etc/inittab
kill -HUP 1
EOF
          chmod +x /etc/local.d/autologin.start
          $STD rc-update add local default 2>/dev/null || true
          /etc/local.d/autologin.start &>/dev/null || true
          sleep 1
          pkill -f 'agetty.*tty1' &>/dev/null || true
          pkill -f 'agetty.*console' &>/dev/null || true
        else
          msg_warn "agetty is unavailable — leaving /etc/inittab alone rather than pointing it at a binary that does not exist"
        fi
      fi
      touch /root/.hushlogin
      ;;

    sysvinit)
      # Devuan/older SysVinit systems: modify inittab for auto-login on tty1 + console
      if [[ -f /etc/inittab ]]; then
        cp /etc/inittab /etc/inittab.bak 2>/dev/null || true

        # Replace the tty1 getty line with an autologin version.
        # Devuan 5 ships: 1:2345:respawn:/sbin/agetty --noclear tty1 38400 linux
        sed -i 's|^\(1:[0-9]*:respawn:\).*[ag]etty.*tty1.*|1:2345:respawn:/sbin/agetty --autologin root --noclear tty1 38400 linux|' /etc/inittab

        # Add/replace console entry (pct console maps to /dev/console in some configs)
        sed -i '/^[^#]*:.*:respawn:.*[ag]etty.*console/d' /etc/inittab
        sed -i '/^# LXC console autologin/d' /etc/inittab
        cat >>/etc/inittab <<'EOF'

# LXC console autologin (added by community-scripts)
co:2345:respawn:/sbin/agetty --autologin root --noclear console 115200 linux
EOF

        # IMPORTANT: signal init to load the new inittab into memory FIRST,
        # then kill the running getty — init will respawn it using the new config.
        # (Killing first causes init to respawn with the OLD in-memory config.)
        telinit q &>/dev/null || init q &>/dev/null || kill -HUP 1 &>/dev/null || true
        sleep 1
        pkill -f '[ag]etty.*tty1' &>/dev/null || true
        pkill -f '[ag]etty.*console' &>/dev/null || true
      fi
      touch /root/.hushlogin
      ;;
    esac

    msg_ok "Customized Container"
  fi

  # Disable readline bracketed-paste on the PVE noVNC console (TERM=linux only):
  # bash 5.3+/readline 8.3 emit a cursor-position query (ESC[6n) around
  # bracketed-paste setup whose response leaks into the first prompt as
  # "R;80R" garbage. Scoped to term=linux so SSH sessions (xterm) keep it.
  if [[ -d /etc || -f /etc/inputrc ]] && ! grep -q 'enable-bracketed-paste off' /etc/inputrc 2>/dev/null; then
    cat >>/etc/inputrc <<'EOF'

$if term=linux
set enable-bracketed-paste off
$endif
EOF
  fi

  # Update entrypoint. write_update_entrypoint (core.func) generates a bootstrap
  # that pulls the shared update helper, so a script removed upstream explains
  # itself instead of failing `update` with a raw 404.
  # $app (NSAPP), not var_os: var_os is set on every container, so an app
  # container wrote UPDATE_SCRIPT_NAME=debian and `update` pulled ct/debian.sh --
  # which reported "no update available" for Vaultwarden.
  local update_script_name="${app:-${var_os:-}}"
  if declare -f write_update_entrypoint >/dev/null 2>&1; then
    write_update_entrypoint "$app" "$update_script_name"
  else
    # Defensive fallback if core.func is not loaded: legacy direct-pull entrypoint.
    echo "bash -c \"\$(curl -fsSL ${COMMUNITY_SCRIPTS_URL:-https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main}/ct/${update_script_name}.sh)\"" >/usr/bin/update
    chmod +x /usr/bin/update
  fi

  # Inject SSH authorized keys if provided
  if [[ -n "${SSH_AUTHORIZED_KEY:-}" ]]; then
    mkdir -p /root/.ssh
    echo "${SSH_AUTHORIZED_KEY}" >/root/.ssh/authorized_keys
    chmod 700 /root/.ssh
    chmod 600 /root/.ssh/authorized_keys
  fi
  post_progress_to_api
}

# ==============================================================================
# SECTION 8: UTILITY FUNCTIONS
# ==============================================================================

# ------------------------------------------------------------------------------
# validate_tz(timezone)
#
# Validates if a timezone is valid
# Returns: 0 if valid, 1 if invalid
# ------------------------------------------------------------------------------
validate_tz() {
  local tz="$1"
  [[ -f "/usr/share/zoneinfo/$tz" ]]
}

# ------------------------------------------------------------------------------
# set_timezone(timezone)
#
# Sets container timezone
# ------------------------------------------------------------------------------
set_timezone() {
  local tz="$1"
  if validate_tz "$tz"; then
    ln -sf "/usr/share/zoneinfo/$tz" /etc/localtime
    echo "$tz" >/etc/timezone 2>/dev/null || true

    # Update tzdata if available
    case "$PKG_MANAGER" in
    apt)
      dpkg-reconfigure -f noninteractive tzdata 2>/dev/null || true
      ;;
    esac
    msg_ok "Timezone set to $tz"
  else
    msg_warn "Invalid timezone: $tz"
  fi
}

# ------------------------------------------------------------------------------
# os_info()
#
# Prints detected OS information (for debugging)
# ------------------------------------------------------------------------------
os_info() {
  echo "OS Type:      $OS_TYPE"
  echo "OS Family:    $OS_FAMILY"
  echo "OS Version:   $OS_VERSION"
  echo "Pkg Manager:  $PKG_MANAGER"
  echo "Init System:  $INIT_SYSTEM"
}