Add build and package support to minijail

src/platform/minijail/minijail.cc

 // Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // Some portions Copyright (c) 2009 The Chromium Authors.
 //
 // Implements MiniJail jailing logic.
 
 #include "minijail.h"
 
 #include <errno.h>
 
 namespace chromeos {
 
 bool MiniJail::Jail() const {
   // XXX This is a very early implementation of the jailing logic.
   // XXX Many features are missing or will be made more tunable.
   const minijail::Options *opts = options();
+  if (!opts) {
+    LOG(ERROR) << "No Options given. Initialize must be called first "
+               << "with a valid Option pointer.";
+    return false;
+  }
   const minijail::Env *env = opts->env();
 
   int namespaces = 0;
   if (opts->namespace_pid())
     namespaces |= CLONE_NEWPID;
   if (opts->namespace_vfs())
     namespaces |= CLONE_NEWNS;
   // Dumb forced exit on failure.
   LOG_IF(FATAL, !env->EnterNamespace(namespaces));
 
@@ skipping 29 matching lines @@
 
   if (opts->use_capabilities()) {
     // TODO(wad) use helpers to read caps from flags
     LOG_IF(FATAL, !env->SanitizeCapabilities(0));
     LOG_IF(FATAL, !env->SanitizeBoundingSet(0));
   }
   return true;
 }
 
 }  // namespace chromeos