core utils updates

kernel/bin/tee

@@ -60,12 +60,42 @@ function barePosixBlocks(size) {
   return Math.ceil(Number(size) / 512) || 0
 }
 
+/**
+ * Raw stdout for NUL/binary when **`process.stdout.write`** is missing.
+ * If **`ctx.bareOsBinWrite(Uint8Array|string)`** is set (tests / host), use it.
+ * @param {Record<string, unknown>} ctx
+ * @param {string | Uint8Array} chunk
+ * @returns {boolean}
+ */
+function bareOsEmitRaw(ctx, chunk) {
+  if (typeof ctx.bareOsBinWrite === 'function') {
+    const b4 = ctx.b4a
+    const u8 =
+      typeof chunk === 'string'
+        ? b4 && typeof b4.from === 'function'
+          ? b4.from(chunk)
+          : new TextEncoder().encode(chunk)
+        : chunk
+    ctx.bareOsBinWrite(u8 instanceof Uint8Array ? u8 : new Uint8Array(u8))
+    return true
+  }
+  const w = globalThis.process?.stdout?.write
+  if (typeof w === 'function') {
+    w.call(globalThis.process.stdout, chunk)
+    return true
+  }
+  return false
+}
+
 async function run(ctx, argv) {
   let append = false
+  let unbuf = false
   const files = []
   for (let i = 1; i < argv.length; i++) {
-    if (argv[i] === '-a' || argv[i] === '--append') append = true
-    else if (argv[i] !== '--') files.push(argv[i])
+    const a = argv[i]
+    if (a === '-a' || a === '--append') append = true
+    else if (a === '-u') unbuf = true
+    else if (a !== '--') files.push(a)
   }
   const text = bareStdin(ctx)
   const data = ctx.b4a.from(text)
@@ -83,5 +113,11 @@ async function run(ctx, argv) {
       ctx.exitCode = 1
     }
   }
-  ctx.console.log(text.replace(/\n$/, ''))
+  const out = text.endsWith('\n') ? text : text + '\n'
+  const pw = globalThis.process?.stdout?.write
+  if (unbuf && typeof pw === 'function') {
+    pw.call(globalThis.process.stdout, out)
+  } else {
+    ctx.console.log(text.replace(/\n$/, ''))
+  }
 }