updates

kernel/bin/printenv

@@ -0,0 +1,19 @@
+/** 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 e = ctx.vfs.env
+  const names = argv.slice(1).filter((a) => !a.startsWith('-'))
+  if (!names.length) {
+    for (const k of Object.keys(e).sort()) {
+      ctx.console.log(k + '=' + (e[k] ?? ''))
+    }
+    return
+  }
+  for (const n of names) {
+    if (e[n] != null) ctx.console.log(e[n])
+    else ctx.exitCode = 1
+  }
+}