add os.Getenv()

R=rsc
DELTA=51  (50 added, 0 deleted, 1 changed)
OCL=15665
CL=15667
diff --git a/test/env.go b/test/env.go
new file mode 100644
index 0000000..8b995f5
--- /dev/null
+++ b/test/env.go
@@ -0,0 +1,26 @@
+// $G $F.go && $L $F.$A && ./$A.out
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import os "os"
+
+func main() {
+	ga, e0 := os.Getenv("GOARCH");
+	if e0 != nil {
+		print("$GOARCH: ", e0.String(), "\n");
+		sys.exit(1);
+	}
+	if ga != "amd64" {
+		print("$GOARCH=", ga, "\n");
+		sys.exit(1);
+	}
+	xxx, e1 := os.Getenv("DOES_NOT_EXIST");
+	if e1 != os.ENOENV {
+		print("$DOES_NOT_EXIST=", xxx, "; err = ", e1.String(), "\n");
+		sys.exit(1);
+	}
+}