1 // Copyright (c) 2012 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 #ifndef CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_ 6 #define CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_ 7 8 #include "base/posix/global_descriptors.h" 9 #include "ipc/ipc_descriptors.h" 10 11 namespace content { 12 13 // Contents of the initial message sent from the zygote to the browser when it 14 // is ready to go. 15 static const char kZygoteHelloMessage[] = "ZYGOTE_OK"; 16 17 // Maximum allowable length for messages sent to the zygote. 18 const size_t kZygoteMaxMessageLength = 8192; 19 20 // File descriptors initialized by the Zygote Host 21 const int kZygoteSocketPairFd = 22 kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor; 23 // This file descriptor is special. It is passed to the Zygote and a setuid 24 // helper will be called to locate the process of the Zygote on the system. 25 // This mechanism is used when multiple PID namespaces exist because of the 26 // setuid sandbox. 27 // It is very important that this file descriptor does not exist in multiple 28 // processes. 29 // This number must be kept in sync in sandbox/linux/suid/sandbox.c 30 const int kZygoteIdFd = 7; 31 32 // These are the command codes used on the wire between the browser and the 33 // zygote. 34 enum { 35 // Fork off a new renderer. 36 kZygoteCommandFork = 0, 37 38 // Reap a renderer child. 39 kZygoteCommandReap = 1, 40 41 // Check what happened to a child process. 42 kZygoteCommandGetTerminationStatus = 2, 43 44 // Read a bitmask of kSandboxLinux* 45 kZygoteCommandGetSandboxStatus = 3 46 }; 47 48 } // namespace content 49 50 #endif // CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_ 51
