1 files changed, 0 insertions, 81 deletions
diff --git a/test/util/capability_util.cc b/test/util/capability_util.cc
deleted file mode 100644
index 5d733887b..000000000
--- a/test/util/capability_util.cc
+++ /dev/null
@@ -1,81 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "test/util/capability_util.h"
-
-#include <linux/capability.h>
-#include <sched.h>
-#include <sys/mman.h>
-#include <sys/wait.h>
-
-#include <iostream>
-
-#include "absl/strings/str_cat.h"
-#include "test/util/memory_util.h"
-#include "test/util/posix_error.h"
-#include "test/util/save_util.h"
-#include "test/util/test_util.h"
-
-namespace gvisor {
-namespace testing {
-
-PosixErrorOr<bool> CanCreateUserNamespace() {
-  // The most reliable way to determine if userns creation is possible is by
-  // trying to create one; see below.
-  ASSIGN_OR_RETURN_ERRNO(
-      auto child_stack,
-      MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
-  int const child_pid =
-      clone(+[](void*) { return 0; },
-            reinterpret_cast<void*>(child_stack.addr() + kPageSize),
-            CLONE_NEWUSER | SIGCHLD, /* arg = */ nullptr);
-  if (child_pid > 0) {
-    int status;
-    int const ret = waitpid(child_pid, &status, /* options = */ 0);
-    MaybeSave();
-    if (ret < 0) {
-      return PosixError(errno, "waitpid");
-    }
-    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
-      return PosixError(
-          ESRCH, absl::StrCat("child process exited with status ", status));
-    }
-    return true;
-  } else if (errno == EPERM) {
-    // Per clone(2), EPERM can be returned if:
-    //
-    // - "CLONE_NEWUSER was specified in flags, but either the effective user ID
-    // or the effective group ID of the caller does not have a mapping in the
-    // parent namespace (see user_namespaces(7))."
-    //
-    // - "(since Linux 3.9) CLONE_NEWUSER was specified in flags and the caller
-    // is in a chroot environment (i.e., the caller's root directory does
-    // not match the root directory of the mount namespace in which it
-    // resides)."
-    std::cerr << "clone(CLONE_NEWUSER) failed with EPERM";
-    return false;
-  } else if (errno == EUSERS) {
-    // "(since Linux 3.11) CLONE_NEWUSER was specified in flags, and the call
-    // would cause the limit on the number of nested user namespaces to be
-    // exceeded. See user_namespaces(7)."
-    std::cerr << "clone(CLONE_NEWUSER) failed with EUSERS";
-    return false;
-  } else {
-    // Unexpected error code; indicate an actual error.
-    return PosixError(errno, "clone(CLONE_NEWUSER)");
-  }
-}
-
-}  // namespace testing
-}  // namespace gvisor