1 files changed, 0 insertions, 208 deletions
diff --git a/sandbox/linux/services/namespace_sandbox.cc b/sandbox/linux/services/namespace_sandbox.cc
deleted file mode 100644
index 23796446f3..0000000000
--- a/sandbox/linux/services/namespace_sandbox.cc
+++ /dev/null
@@ -1,208 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "sandbox/linux/services/namespace_sandbox.h"
-
-#include <sched.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "base/command_line.h"
-#include "base/environment.h"
-#include "base/files/scoped_file.h"
-#include "base/logging.h"
-#include "base/macros.h"
-#include "base/posix/eintr_wrapper.h"
-#include "base/process/launch.h"
-#include "base/process/process.h"
-#include "sandbox/linux/services/credentials.h"
-#include "sandbox/linux/services/namespace_utils.h"
-
-namespace sandbox {
-
-namespace {
-
-const char kSandboxUSERNSEnvironmentVarName[] = "SBX_USER_NS";
-const char kSandboxPIDNSEnvironmentVarName[] = "SBX_PID_NS";
-const char kSandboxNETNSEnvironmentVarName[] = "SBX_NET_NS";
-
-#if !defined(OS_NACL_NONSFI)
-class WriteUidGidMapDelegate : public base::LaunchOptions::PreExecDelegate {
- public:
-  WriteUidGidMapDelegate()
-      : uid_(getuid()),
-        gid_(getgid()),
-        supports_deny_setgroups_(
-            NamespaceUtils::KernelSupportsDenySetgroups()) {}
-
-  ~WriteUidGidMapDelegate() override {}
-
-  void RunAsyncSafe() override {
-    if (supports_deny_setgroups_) {
-      RAW_CHECK(NamespaceUtils::DenySetgroups());
-    }
-    RAW_CHECK(NamespaceUtils::WriteToIdMapFile("/proc/self/uid_map", uid_));
-    RAW_CHECK(NamespaceUtils::WriteToIdMapFile("/proc/self/gid_map", gid_));
-  }
-
- private:
-  const uid_t uid_;
-  const gid_t gid_;
-  const bool supports_deny_setgroups_;
-  DISALLOW_COPY_AND_ASSIGN(WriteUidGidMapDelegate);
-};
-
-void SetEnvironForNamespaceType(base::EnvironmentMap* environ,
-                                base::NativeEnvironmentString env_var,
-                                bool value) {
-  // An empty string causes the env var to be unset in the child process.
-  (*environ)[env_var] = value ? "1" : "";
-}
-
-// Linux supports up to 64 signals. This should be updated if that ever changes.
-int g_signal_exit_codes[64];
-
-void TerminationSignalHandler(int sig) {
-  // Return a special exit code so that the process is detected as terminated by
-  // a signal.
-  const size_t sig_idx = static_cast<size_t>(sig);
-  if (sig_idx < arraysize(g_signal_exit_codes)) {
-    _exit(g_signal_exit_codes[sig_idx]);
-  }
-
-  _exit(NamespaceSandbox::kDefaultExitCode);
-}
-#endif  // !defined(OS_NACL_NONSFI)
-
-}  // namespace
-
-#if !defined(OS_NACL_NONSFI)
-// static
-base::Process NamespaceSandbox::LaunchProcess(
-    const base::CommandLine& cmdline,
-    const base::LaunchOptions& options) {
-  return LaunchProcess(cmdline.argv(), options);
-}
-
-// static
-base::Process NamespaceSandbox::LaunchProcess(
-    const std::vector<std::string>& argv,
-    const base::LaunchOptions& options) {
-  int clone_flags = 0;
-  int ns_types[] = {CLONE_NEWUSER, CLONE_NEWPID, CLONE_NEWNET};
-  for (const int ns_type : ns_types) {
-    if (NamespaceUtils::KernelSupportsUnprivilegedNamespace(ns_type)) {
-      clone_flags |= ns_type;
-    }
-  }
-  CHECK(clone_flags & CLONE_NEWUSER);
-
-  // These fields may not be set by the caller.
-  CHECK(options.pre_exec_delegate == nullptr);
-  CHECK_EQ(0, options.clone_flags);
-
-  WriteUidGidMapDelegate write_uid_gid_map_delegate;
-
-  base::LaunchOptions launch_options = options;
-  launch_options.pre_exec_delegate = &write_uid_gid_map_delegate;
-  launch_options.clone_flags = clone_flags;
-
-  const std::pair<int, const char*> clone_flag_environ[] = {
-      std::make_pair(CLONE_NEWUSER, kSandboxUSERNSEnvironmentVarName),
-      std::make_pair(CLONE_NEWPID, kSandboxPIDNSEnvironmentVarName),
-      std::make_pair(CLONE_NEWNET, kSandboxNETNSEnvironmentVarName),
-  };
-
-  base::EnvironmentMap* environ = &launch_options.environ;
-  for (const auto& entry : clone_flag_environ) {
-    const int flag = entry.first;
-    const char* environ_name = entry.second;
-    SetEnvironForNamespaceType(environ, environ_name, clone_flags & flag);
-  }
-
-  return base::LaunchProcess(argv, launch_options);
-}
-
-// static
-pid_t NamespaceSandbox::ForkInNewPidNamespace(bool drop_capabilities_in_child) {
-  const pid_t pid =
-      base::ForkWithFlags(CLONE_NEWPID | SIGCHLD, nullptr, nullptr);
-  if (pid < 0) {
-    return pid;
-  }
-
-  if (pid == 0) {
-    DCHECK_EQ(1, getpid());
-    if (drop_capabilities_in_child) {
-      // Since we just forked, we are single-threaded, so this should be safe.
-      CHECK(Credentials::DropAllCapabilitiesOnCurrentThread());
-    }
-    return 0;
-  }
-
-  return pid;
-}
-
-// static
-void NamespaceSandbox::InstallDefaultTerminationSignalHandlers() {
-  static const int kDefaultTermSignals[] = {
-      SIGHUP, SIGINT, SIGABRT, SIGQUIT, SIGPIPE, SIGTERM, SIGUSR1, SIGUSR2,
-  };
-
-  for (const int sig : kDefaultTermSignals) {
-    InstallTerminationSignalHandler(sig, kDefaultExitCode);
-  }
-}
-
-// static
-bool NamespaceSandbox::InstallTerminationSignalHandler(
-    int sig,
-    int exit_code) {
-  struct sigaction old_action;
-  PCHECK(sigaction(sig, nullptr, &old_action) == 0);
-
-  if (old_action.sa_flags & SA_SIGINFO &&
-      old_action.sa_sigaction != nullptr) {
-    return false;
-  } else if (old_action.sa_handler != SIG_DFL) {
-    return false;
-  }
-
-  const size_t sig_idx = static_cast<size_t>(sig);
-  CHECK_LT(sig_idx, arraysize(g_signal_exit_codes));
-
-  DCHECK_GE(exit_code, 0);
-  DCHECK_LT(exit_code, 256);
-
-  g_signal_exit_codes[sig_idx] = exit_code;
-
-  struct sigaction action = {};
-  action.sa_handler = &TerminationSignalHandler;
-  PCHECK(sigaction(sig, &action, nullptr) == 0);
-  return true;
-}
-#endif  // !defined(OS_NACL_NONSFI)
-
-// static
-bool NamespaceSandbox::InNewUserNamespace() {
-  return getenv(kSandboxUSERNSEnvironmentVarName) != nullptr;
-}
-
-// static
-bool NamespaceSandbox::InNewPidNamespace() {
-  return getenv(kSandboxPIDNSEnvironmentVarName) != nullptr;
-}
-
-// static
-bool NamespaceSandbox::InNewNetNamespace() {
-  return getenv(kSandboxNETNSEnvironmentVarName) != nullptr;
-}
-
-}  // namespace sandbox