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 namespace content { 9 10 // Contents of the initial message sent from the zygote to the browser when it 11 // is ready to go. 12 static const char kZygoteHelloMessage[] = "ZYGOTE_OK"; 13 14 // Maximum allowable length for messages sent to the zygote. 15 const size_t kZygoteMaxMessageLength = 8192; 16 17 // File descriptors initialized by the Zygote Host 18 const int kZygoteSocketPairFd = 3; 19 const int kZygoteRendererSocketFd = 5; 20 // This file descriptor is special. It is passed to the Zygote and a setuid 21 // helper will be called to locate the process of the Zygote on the system. 22 // This mechanism is used when multiple PID namespaces exist because of the 23 // setuid sandbox. 24 // It is very important that this file descriptor does not exist in multiple 25 // processes. 26 // This number must be kept in sync in sandbox/linux/suid/sandbox.c 27 const int kZygoteIdFd = 7; 28 29 // These are the command codes used on the wire between the browser and the 30 // zygote. 31 enum { 32 // Fork off a new renderer. 33 kZygoteCommandFork = 0, 34 35 // Reap a renderer child. 36 kZygoteCommandReap = 1, 37 38 // Check what happened to a child process. 39 kZygoteCommandGetTerminationStatus = 2, 40 41 // Read a bitmask of kSandboxLinux* 42 kZygoteCommandGetSandboxStatus = 3 43 }; 44 45 } // namespace content 46 47 #endif // CONTENT_COMMON_ZYGOTE_COMMANDS_LINUX_H_ 48
