updates

kernel/bin/seq

@@ -0,0 +1,31 @@
+/** 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 args = argv.slice(1).filter((a) => !a.startsWith('-'))
+  let a = 1
+  let step = 1
+  let b = 1
+  if (args.length === 1) {
+    b = parseInt(args[0], 10)
+  } else if (args.length === 2) {
+    a = parseInt(args[0], 10)
+    b = parseInt(args[1], 10)
+  } else if (args.length >= 3) {
+    a = parseInt(args[0], 10)
+    step = parseInt(args[1], 10)
+    b = parseInt(args[2], 10)
+  }
+  if (step === 0 || Number.isNaN(a) || Number.isNaN(b) || Number.isNaN(step)) {
+    ctx.console.error('seq: invalid arguments')
+    ctx.exitCode = 1
+    return
+  }
+  if (step > 0) {
+    for (let x = a; x <= b; x += step) ctx.console.log(String(x))
+  } else {
+    for (let x = a; x >= b; x += step) ctx.console.log(String(x))
+  }
+}