async function run(ctx, argv) {
  let wantDir = false
  /** @type {string | null} */
  let template = null
  for (let i = 1; i < argv.length; i++) {
    const a = argv[i]
    if (a === '-d') wantDir = true
    else if (!a.startsWith('-')) template = a
  }
  const rnd = () =>
    Math.random().toString(36).slice(2, 10) +
    Math.random().toString(36).slice(2, 6)
  const sixX = 'X'.repeat(6)
  let rel = template || `tmp.${sixX}`
  if (rel.includes(sixX)) rel = rel.replace(new RegExp(sixX, 'g'), rnd())
  else rel = `${rel.replace(/\/+$/, '')}.${rnd()}`
  const full = rel.startsWith('/') ? rel : `/tmp/${rel.replace(/^\/+/, '')}`
  try {
    if (wantDir) await ctx.vfs.mkdir(full, { recursive: false })
    else await ctx.vfs.writeFile(full, ctx.b4a.from(''))
    ctx.console.log(full)
    ctx.exitCode = 0
  } catch (e) {
    ctx.console.error('mktemp: ' + ((e && e.message) || e))
    ctx.exitCode = 1
  }
}