/** Shared helpers for drive-resident /bin scripts (prepended before each command). */
function bareStdin(ctx) {
  return typeof ctx.shellStdin === 'string' ? ctx.shellStdin : ''
}

async function run(ctx, argv) {
  const vfs = ctx.vfs
  const files = argv.slice(1).filter((a) => !a.startsWith('-'))
  /** @type {string[]} */
  let lines = []
  if (!files.length) {
    const s = bareStdin(ctx)
    lines = s.length ? s.split('\n') : []
    if (lines.length && lines[lines.length - 1] === '') lines.pop()
  } else {
    for (const f of files) {
      const buf = await vfs.readFile(f)
      if (!buf) {
        ctx.console.error('sort: ' + f + ': No such file')
        ctx.exitCode = 1
        continue
      }
      const part = ctx.b4a.toString(buf).split('\n')
      if (part.length && part[part.length - 1] === '') part.pop()
      lines.push(...part)
    }
  }
  lines.sort((x, y) => (x < y ? -1 : x > y ? 1 : 0))
  if (lines.length) ctx.console.log(lines.join('\n'))
}