Function pickFreeDisplay

browse/src/xvfb.ts:72–80

(
  rangeStart: number = DISPLAY_RANGE_START,
  rangeEnd: number = DISPLAY_RANGE_END,
)

 * displays in the range are taken.
 */
export function pickFreeDisplay(
  rangeStart: number = DISPLAY_RANGE_START,
  rangeEnd: number = DISPLAY_RANGE_END,
): number | null {
  for (let n = rangeStart; n <= rangeEnd; n++) {
    if (isDisplayFree(n)) return n;
  }
  return null;
}

/**
 * Read the wall-clock start time of a PID via `ps -o lstart=`. Stable across