node-addon-landlock-run

Landlock self-restrict-then-exec launcher for confining subprocesses on Linux: this entry package resolves the per-platform prebuilt binary, runs its functional enforcement probe, and builds its grant argv — consumers never spell launcher flags or parse launcher output themselves.

import { grantArgs, launcherPath, probe } from 'node-addon-landlock-run';

const launcher = launcherPath();
if (probe(launcher) !== 'unusable') {
  const argv = [launcher, ...grantArgs({ readOnly: ['/'], readWrite: ['/tmp/work'] }), '--', 'bash', '-c', command];
}

The launcher installs a Landlock ruleset on itself and execs the wrapped command; the ruleset is inherited across execve, so the whole process tree runs confined. Everything not granted is denied, and launcher failures exit 125 without running the command — fail-closed, never fail-open. The binary contract is pinned in the repo's docs/cli-contract.md; the C source rides this tarball (src/main.c) for audit.

Platform packages (os/cpu-selected optional dependencies, no JavaScript inside): node-addon-landlock-run-linux-x64, node-addon-landlock-run-linux-arm64. On hosts without one, launcherPath() returns a deterministic nonexistent path and probe() reports 'unusable' — there is deliberately no install-time compile fallback.