Function tryCreateExclusive

src/utils/computerUse/computerUseLock.ts:79–87

* Attempt to create the lock file atomically with O_EXCL. * Returns true on success, false if the file already exists. * Throws for other errors.

(lock: ComputerUseLock)

 * Throws for other errors.
 */
async function tryCreateExclusive(lock: ComputerUseLock): Promise<boolean> {
  try {
    await writeFile(getLockPath(), jsonStringify(lock), { flag: 'wx' })
    return true
  } catch (e: unknown) {
    if (getErrnoCode(e) === 'EEXIST') return false
    throw e
  }
}

/**
 * Register a shutdown cleanup handler so the lock is released even if