sandbox/linux/suid/client/setuid_sandbox_host_unittest.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "sandbox/linux/suid/client/setuid_sandbox_host.h"
   6
   7 #include <string>
   8
   9 #include "base/environment.h"
  10 #include "base/logging.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "sandbox/linux/suid/common/sandbox.h"
  14 #include "testing/gtest/include/gtest/gtest.h"
  15
  16 namespace sandbox {
  17
  18 TEST(SetuidSandboxHost, SetupLaunchEnvironment) {
  19   const char kTestValue[] = "This is a test";
  20   scoped_ptr<base::Environment> env(base::Environment::Create());
  21   EXPECT_TRUE(env != NULL);
  22
  23   std::string saved_ld_preload;
  24   bool environment_had_ld_preload;
  25   // First, back-up the real LD_PRELOAD if any.
  26   environment_had_ld_preload = env->GetVar("LD_PRELOAD", &saved_ld_preload);
  27   // Setup environment variables to save or not save.
  28   EXPECT_TRUE(env->SetVar("LD_PRELOAD", kTestValue));
  29   EXPECT_TRUE(env->UnSetVar("LD_ORIGIN_PATH"));
  30
  31   scoped_ptr<SetuidSandboxHost> sandbox_host(SetuidSandboxHost::Create());
  32   EXPECT_TRUE(sandbox_host != NULL);
  33
  34   // Make sure the environment is clean.
  35   EXPECT_TRUE(env->UnSetVar(kSandboxEnvironmentApiRequest));
  36   EXPECT_TRUE(env->UnSetVar(kSandboxEnvironmentApiProvides));
  37
  38   sandbox_host->SetupLaunchEnvironment();
  39
  40   // Check if the requested API environment was set.
  41   std::string api_request;
  42   EXPECT_TRUE(env->GetVar(kSandboxEnvironmentApiRequest, &api_request));
  43   int api_request_num;
  44   EXPECT_TRUE(base::StringToInt(api_request, &api_request_num));
  45   EXPECT_EQ(api_request_num, kSUIDSandboxApiNumber);
  46
  47   // Now check if LD_PRELOAD was saved to SANDBOX_LD_PRELOAD.
  48   std::string sandbox_ld_preload;
  49   EXPECT_TRUE(env->GetVar("SANDBOX_LD_PRELOAD", &sandbox_ld_preload));
  50   EXPECT_EQ(sandbox_ld_preload, kTestValue);
  51
  52   // Check that LD_ORIGIN_PATH was not saved.
  53   EXPECT_FALSE(env->HasVar("SANDBOX_LD_ORIGIN_PATH"));
  54
  55   // We should not forget to restore LD_PRELOAD at the end, or this environment
  56   // variable will affect the next running tests!
  57   if (environment_had_ld_preload) {
  58     EXPECT_TRUE(env->SetVar("LD_PRELOAD", saved_ld_preload));
  59   } else {
  60     EXPECT_TRUE(env->UnSetVar("LD_PRELOAD"));
  61   }
  62 }
  63
  64 // This test doesn't accomplish much, but will make sure that analysis tools
  65 // will run this codepath.
  66 TEST(SetuidSandboxHost, GetSandboxBinaryPath) {
  67   scoped_ptr<SetuidSandboxHost> setuid_sandbox_host(
  68       SetuidSandboxHost::Create());
  69   ignore_result(setuid_sandbox_host->GetSandboxBinaryPath());
  70 }
  71
  72 }  // namespace sandbox