node

#!/bin/bash
#
# ZCode Remote Server Node.js Wrapper for CentOS 7
#
# This script replaces ~/.zcode/server/node to make ZCode's remote server
# use a custom glibc 2.28 without modifying any ZCode configuration.
#
# How it works:
#   ZCode client (Windows) connects to a remote Linux server via SSH and
#   executes ~/.zcode/server/node directly. Since this is a direct SSH call
#   (not through ~/.bashrc aliases), we must replace the node binary itself.
#
#   - Original node binary is renamed to node.real
#   - This wrapper uses ld-linux-x86-64.so.2 --library-path to launch node.real
#     with custom glibc 2.28
#   - ZCode client is completely unaware of the wrapper
#
# Prerequisites:
#   - glibc 2.28 installed at $HOME/opt/glibc-2.28
#   - GCC 9.5.0 installed at $HOME/opt/gcc-9.5.0
#   - ZCode remote server installed (original node at ~/.zcode/server/node)
#
# Installation (on remote Linux server):
#   cp ~/.zcode/server/node ~/.zcode/server/node.real
#   cp scripts/node ~/.zcode/server/node
#   chmod +x ~/.zcode/server/node
#
# Caution: ZCode may overwrite this file during upgrades. Re-apply if needed.
#

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
NODE_REAL="${SCRIPT_DIR}/node.real"

if [ ! -x "${NODE_REAL}" ]; then
    echo "[zcode] ERROR: Original node binary not found: ${NODE_REAL}" >&2
    echo "[zcode] Rename the original to node.real first:" >&2
    echo "[zcode]   cp ~/.zcode/server/node ~/.zcode/server/node.real" >&2
    exit 1
fi

# ─── Locate custom glibc ─────────────────────────────────────────────────────
GLIBC_LINKER="${HOME}/opt/glibc-2.28/lib/ld-linux-x86-64.so.2"
GLIBC_LIB_PATH="${HOME}/opt/glibc-2.28/lib:${HOME}/opt/gcc-9.5.0/lib64:/lib64:/usr/lib64"

if [ ! -x "${GLIBC_LINKER}" ]; then
    echo "[zcode] ERROR: Custom glibc linker not found at: ${GLIBC_LINKER}" >&2
    exit 1
fi

# ─── Save original environment ───────────────────────────────────────────────
ORIGINAL_LD_LIBRARY_PATH="${LD_LIBRARY_PATH-}"
ORIGINAL_LD_PRELOAD="${LD_PRELOAD-}"
ORIGINAL_LANG="${LANG-}"
ORIGINAL_LC_ALL="${LC_ALL-}"
ORIGINAL_LOCPATH="${LOCPATH-}"

# ─── Set safe runtime environment ────────────────────────────────────────────
export LANG="en_US.UTF-8"
export LC_ALL="en_US.UTF-8"

if [ -d "${HOME}/opt/glibc-2.28/lib/locale" ]; then
    export LOCPATH="${HOME}/opt/glibc-2.28/lib/locale"
fi

# Only GCC lib path, NOT glibc path, to avoid subprocess crashes
export LD_LIBRARY_PATH="${HOME}/opt/gcc-9.5.0/lib64${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"

# ─── Launch original node with custom glibc ──────────────────────────────────
"${GLIBC_LINKER}" \
    --library-path "${GLIBC_LIB_PATH}" \
    "${NODE_REAL}" "$@"

RETURN_CODE=$?

# ─── Restore original environment ────────────────────────────────────────────
export LD_LIBRARY_PATH="${ORIGINAL_LD_LIBRARY_PATH}"
[ -n "${ORIGINAL_LD_PRELOAD-}" ] && export LD_PRELOAD="${ORIGINAL_LD_PRELOAD}" || unset LD_PRELOAD || true
[ -n "${ORIGINAL_LANG}" ] && export LANG="${ORIGINAL_LANG}"
if [ -n "${ORIGINAL_LC_ALL}" ]; then
    export LC_ALL="${ORIGINAL_LC_ALL}"
else
    unset LC_ALL || true
fi
if [ -n "${ORIGINAL_LOCPATH}" ]; then
    export LOCPATH="${ORIGINAL_LOCPATH}"
else
    unset LOCPATH || true
fi

exit ${RETURN_CODE}