Function killProcessTree

packages/cli/src/utils/orphanCleanup.ts:40–66

(pid: number, signal: NodeJS.Signals = "SIGTERM")

 * the pgrep/ps utilities are not available.
 */
export function killProcessTree(pid: number, signal: NodeJS.Signals = "SIGTERM"): void {
  if (process.platform === "win32") return;

  const descendants = getDescendants(pid);
  const allPids = [...descendants.reverse(), pid];

  for (const p of allPids) {
    try {
      process.kill(p, signal);
    } catch {
      // Already exited.
    }
  }

  // Escalate to SIGKILL after a short grace period for any survivors.
  if (signal !== "SIGKILL") {
    setTimeout(() => {
      for (const p of allPids) {
        try {
          process.kill(p, "SIGKILL");
        } catch {
          // Already exited.
        }
      }
    }, 500).unref();
  }
}

function getDescendants(pid: number): number[] {
  let children: number[];