Function toUnixTimestamp

lib/internal/fs/utils.js:783–799

(time, name = 'time')

// converts Date or number to a fractional UNIX timestamp
function toUnixTimestamp(time, name = 'time') {
  // eslint-disable-next-line eqeqeq
  if (typeof time === 'string' && +time == time) {
    return +time;
  }
  if (NumberIsFinite(time)) {
    if (time < 0) {
      return DateNow() / 1000;
    }
    return time;
  }
  if (isDate(time)) {
    // Convert to 123.456 UNIX timestamp
    return DatePrototypeGetTime(time) / 1000;
  }
  throw new ERR_INVALID_ARG_TYPE(name, ['Date', 'Time in seconds'], time);
}

const validateOffsetLengthRead = hideStackFrames(
  (offset, length, bufferLength) => {