Extend toolbox with SE Android support.

Add -Z option to ls and ps for displaying security contexts.
Modify id to display security context.
Add new SELinux commands: chcon, getenforce, getsebool, load_policy, restorecon, runcon, setenforce, setsebool.

Change-Id: Ia20941be4a6cd706fe392fed6e38a37d880ec5f1
diff --git a/toolbox/getenforce.c b/toolbox/getenforce.c
new file mode 100644
index 0000000..9e7589a
--- /dev/null
+++ b/toolbox/getenforce.c
@@ -0,0 +1,30 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <selinux/selinux.h>
+
+int getenforce_main(int argc, char **argv)
+{
+    int rc;
+
+    rc = is_selinux_enabled();
+    if (rc <= 0) {
+        printf("Disabled\n");
+        return 0;
+    }
+
+    rc = security_getenforce();
+    if (rc < 0) {
+        fprintf(stderr, "Could not get enforcing status:  %s\n",
+                strerror(errno));
+        return 2;
+    }
+
+    if (rc)
+        printf("Enforcing\n");
+    else
+        printf("Permissive\n");
+
+    return 0;
+}