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The previous patch in this series creates a new directory service entry specifically for obtaining the content process temp directory. This patch converts everything else to reference that entry. It also sets appropriate environment variables in the content processes so that system APIs automatically pick up the directory. This is necessary for the crash reporter to be able to call those APIs in exception handling contexts. MozReview-Commit-ID: DF6aNKrWnWp --HG-- extra : rebase_source : 3cc914f5d369dbc70f03fa4cb68a7eab0cc1be59
144 lines
4.0 KiB
C++
144 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ipc/IOThreadChild.h"
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#include "ContentProcess.h"
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#if defined(XP_WIN) && defined(MOZ_CONTENT_SANDBOX)
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#include "mozilla/WindowsVersion.h"
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#endif
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#if defined(XP_MACOSX) && defined(MOZ_CONTENT_SANDBOX)
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#include <stdlib.h>
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#endif
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#if (defined(XP_WIN) || defined(XP_MACOSX)) && defined(MOZ_CONTENT_SANDBOX)
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#include "mozilla/Preferences.h"
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#include "nsAppDirectoryServiceDefs.h"
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#include "nsDirectoryService.h"
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#include "nsDirectoryServiceDefs.h"
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#endif
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using mozilla::ipc::IOThreadChild;
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namespace mozilla {
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namespace dom {
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#if defined(XP_WIN) && defined(MOZ_CONTENT_SANDBOX)
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static bool
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IsSandboxTempDirRequired()
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{
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// On Windows, a sandbox-writable temp directory is only used
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// for Vista or later with sandbox pref level >= 1.
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return (IsVistaOrLater() &&
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(Preferences::GetInt("security.sandbox.content.level") >= 1));
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}
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static void
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SetTmpEnvironmentVariable(nsIFile* aValue)
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{
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// Save the TMP environment variable so that is is picked up by GetTempPath().
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// Note that we specifically write to the TMP variable, as that is the first
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// variable that is checked by GetTempPath() to determine its output.
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nsAutoString fullTmpPath;
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nsresult rv = aValue->GetPath(fullTmpPath);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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NS_WARN_IF(!SetEnvironmentVariableW(L"TMP", fullTmpPath.get()));
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// We also set TEMP in case there is naughty third-party code that is
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// referencing the environment variable directly.
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NS_WARN_IF(!SetEnvironmentVariableW(L"TEMP", fullTmpPath.get()));
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}
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#endif
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#if defined(XP_MACOSX) && defined(MOZ_CONTENT_SANDBOX)
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static bool
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IsSandboxTempDirRequired()
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{
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// On OSX, use the sandbox-writable temp when the pref level >= 1.
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return (Preferences::GetInt("security.sandbox.content.level") >= 1);
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}
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static void
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SetTmpEnvironmentVariable(nsIFile* aValue)
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{
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nsAutoCString fullTmpPath;
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nsresult rv = aValue->GetNativePath(fullTmpPath);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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NS_WARN_IF(setenv("TMPDIR", fullTmpPath.get(), 1) != 0);
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}
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#endif
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#if (defined(XP_WIN) || defined(XP_MACOSX)) && defined(MOZ_CONTENT_SANDBOX)
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static void
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SetUpSandboxEnvironment()
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{
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MOZ_ASSERT(nsDirectoryService::gService,
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"SetUpSandboxEnvironment relies on nsDirectoryService being initialized");
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if (!IsSandboxTempDirRequired()) {
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return;
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}
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nsCOMPtr<nsIFile> sandboxedContentTemp;
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nsresult rv =
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nsDirectoryService::gService->Get(NS_APP_CONTENT_PROCESS_TEMP_DIR,
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NS_GET_IID(nsIFile),
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getter_AddRefs(sandboxedContentTemp));
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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// Change the gecko defined temp directory to our sandbox-writable one.
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// Undefine returns a failure if the property is not already set.
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Unused << nsDirectoryService::gService->Undefine(NS_OS_TEMP_DIR);
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rv = nsDirectoryService::gService->Set(NS_OS_TEMP_DIR, sandboxedContentTemp);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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SetTmpEnvironmentVariable(sandboxedContentTemp);
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}
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#endif
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void
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ContentProcess::SetAppDir(const nsACString& aPath)
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{
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mXREEmbed.SetAppDir(aPath);
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}
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bool
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ContentProcess::Init()
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{
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mContent.Init(IOThreadChild::message_loop(),
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ParentPid(),
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IOThreadChild::channel());
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mXREEmbed.Start();
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mContent.InitXPCOM();
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mContent.InitGraphicsDeviceData();
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#if (defined(XP_WIN) || defined(XP_MACOSX)) && defined(MOZ_CONTENT_SANDBOX)
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SetUpSandboxEnvironment();
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#endif
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return true;
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}
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// Note: CleanUp() never gets called in non-debug builds because we exit early
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// in ContentChild::ActorDestroy().
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void
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ContentProcess::CleanUp()
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{
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mXREEmbed.Stop();
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}
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} // namespace dom
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} // namespace mozilla
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