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/chcon.c b/toolbox/chcon.c
new file mode 100644
index 0000000..d594b9b
--- /dev/null
+++ b/toolbox/chcon.c
@@ -0,0 +1,25 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <selinux/selinux.h>
+
+int chcon_main(int argc, char **argv)
+{
+    int rc, i;
+
+    if (argc < 3) {
+        fprintf(stderr, "usage:  %s context path...\n", argv[0]);
+        exit(1);
+    }
+
+    for (i = 2; i < argc; i++) {
+        rc = setfilecon(argv[i], argv[1]);
+        if (rc < 0) {
+            fprintf(stderr, "%s:  Could not label %s with %s:  %s\n",
+                    argv[0], argv[i], argv[1], strerror(errno));
+            exit(2);
+        }
+    }
+    exit(0);
+}