Squash commits for public release

test/kernel/env/BUILD.gn

@@ -0,0 +1,8 @@
+import("//build/test/TEMPLATE.gni")
+
+xOS_test("env") {
+  test_bundle = "kernel/env"
+  sources = [ "main.c" ]
+  configs = [ "//build/userland:userland_flags" ]
+  deplibs = [ "libc" ]
+}

test/kernel/env/main.c

@@ -0,0 +1,28 @@
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(int argc, char** argv)
+{
+    if (getenv("OSTEST")) {
+        char* res = getenv("GO");
+        if (!res) {
+            TestErr("Empty GO env var.");
+        }
+        if (strncmp(res, "go", 2)) {
+            TestErr("Different value in GO env var.");
+        }
+        return 0;
+    }
+
+    if (argc > 1) {
+        TestErr("Loop while executing test.");
+    }
+
+    setenv("OSTEST", "1", 1);
+    setenv("GO", "go", 1);
+    execlp(argv[0], argv[0], "loop", NULL);
+    return 1;
+}