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feat: hook mediator daemon into sandbox entrypoint #1586

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58 changes: 58 additions & 0 deletions scripts/nemoclaw-start.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -505,6 +505,58 @@ cleanup() {
fi
exit "$gateway_status"
}
# ── Mediator daemon ──────────────────────────────────────────────
# Start the mediator daemon if the binary is available. The mediator
# provides the syscall API (policy, fork, IPC, signal, etc.) and writes
# the root workflow token to a file for the agent to read.
MEDIATOR_DAEMON_BIN="/sandbox/mediator-daemon"
MEDIATOR_SOCKET_PATH="/run/openshell/mediator.sock"
MEDIATOR_DB_PATH="sqlite:///sandbox/.mediator/mediator.db?mode=rwc"
MEDIATOR_TOKEN_FILE="/run/openshell/mediator.sock.token"

start_mediator_daemon() {
if [ ! -x "$MEDIATOR_DAEMON_BIN" ]; then
return 0
fi

mkdir -p /run/openshell /sandbox/.mediator
rm -f "$MEDIATOR_SOCKET_PATH" "$MEDIATOR_TOKEN_FILE"

echo "[mediator] Starting mediator daemon..." >&2
MEDIATOR_SOCKET="$MEDIATOR_SOCKET_PATH" \
MEDIATOR_DB="$MEDIATOR_DB_PATH" \
nohup "$MEDIATOR_DAEMON_BIN" \
--socket "$MEDIATOR_SOCKET_PATH" \
--db "$MEDIATOR_DB_PATH" \
--token-file "$MEDIATOR_TOKEN_FILE" \
> /tmp/mediator.log 2>&1 &

local waited=0
while [ ! -S "$MEDIATOR_SOCKET_PATH" ] && [ $waited -lt 30 ]; do
sleep 0.5
waited=$((waited + 1))
done

if [ -S "$MEDIATOR_SOCKET_PATH" ]; then
export MEDIATOR_SOCKET="$MEDIATOR_SOCKET_PATH"
export MEDIATOR_TOKEN="$(cat "$MEDIATOR_TOKEN_FILE" 2>/dev/null || true)"
echo "[mediator] daemon ready (socket: $MEDIATOR_SOCKET_PATH)" >&2
else
echo "[mediator] WARNING: daemon did not start within 15s" >&2
fi

# Write to bashrc/profile so interactive sessions see the env vars.
local home="${_SANDBOX_HOME:-${HOME:-/sandbox}}"
for rc in "$home/.bashrc" "$home/.profile"; do
if [ -w "$rc" ] || [ -w "$(dirname "$rc")" ]; then
if ! grep -qF "MEDIATOR_SOCKET" "$rc" 2>/dev/null; then
printf '\n# mediator\nexport MEDIATOR_SOCKET="%s"\nexport MEDIATOR_TOKEN="%s"\nexport PATH="/sandbox:$PATH"\n' \
"$MEDIATOR_SOCKET_PATH" "$(cat "$MEDIATOR_TOKEN_FILE" 2>/dev/null || true)" >> "$rc"
fi
fi
done
}

# ── Main ─────────────────────────────────────────────────────────

echo 'Setting up NemoClaw...' >&2
Expand Down Expand Up @@ -602,6 +654,9 @@ if [ "$(id -u)" -ne 0 ]; then
touch /tmp/auto-pair.log
chmod 600 /tmp/auto-pair.log

# Start mediator daemon (before gateway so agent has syscall API)
start_mediator_daemon

# Start gateway in background, auto-pair, then wait
nohup "$OPENCLAW" gateway run >/tmp/gateway.log 2>&1 &
GATEWAY_PID=$!
Expand Down Expand Up @@ -655,6 +710,9 @@ validate_openclaw_symlinks
# Ref: https://github.com/NVIDIA/NemoClaw/issues/1019
harden_openclaw_symlinks

# Start mediator daemon (before gateway so agent has syscall API)
start_mediator_daemon

# Start the gateway as the 'gateway' user.
# SECURITY: The sandbox user cannot kill this process because it runs
# under a different UID. The fake-HOME attack no longer works because
Expand Down