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1 // Copyright (c) 2011 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 CHROME_COMMON_NACL_HELPER_LINUX_H_ | |
6 #define CHROME_COMMON_NACL_HELPER_LINUX_H_ | |
7 | |
8 // A mini-zygote specifically for Native Client. This file defines | |
9 // constants used to implement communication between the nacl_helper | |
10 // process and the Chrome zygote. | |
11 | |
12 // Used by Helper to tell Zygote it has started successfully. | |
13 #define kNaClHelperStartupAck "NACLHELPER_OK" | |
14 // Used by Zygote to ask Helper to fork a new NaCl loader. | |
15 #define kNaClForkRequest "NACLFORK" | |
16 | |
17 // The next set of constants define global Linux file descriptors. | |
18 // For communications between NaCl loader and browser. | |
19 // See also content/common/zygote_main_linux.cc and | |
20 // http://code.google.com/p/chromium/wiki/LinuxZygote | |
21 | |
22 // For communications between NaCl loader and zygote. | |
23 #define kNaClZygoteDescriptor 3 | |
24 // For communications between the NaCl loader process and | |
25 // the SUID sandbox. | |
26 #define kNaClSandboxDescriptor 5 | |
27 // NOTE: kNaClSandboxDescriptor must match | |
28 // content/browser/zygote_main_linux.cc | |
29 // kMagicSandboxIPCDescriptor. | |
30 | |
31 // A fork request from the Zygote to the helper includes an array | |
32 // of three file descriptors. These constants are used as indicies | |
33 // into the array. | |
34 // Used to pass in the descriptor for talking to the Browser | |
35 #define kNaClBrowserFDIndex 0 | |
36 // The next two are used in the protocol for discovering the | |
37 // child processes real PID from within the SUID sandbox. See | |
38 // http://code.google.com/p/chromium/wiki/LinuxZygote | |
39 #define kNaClDummyFDIndex 1 | |
40 #define kNaClParentFDIndex 2 | |
41 | |
42 #endif // CHROME_COMMON_NACL_HELPER_LINUX_H_ | |
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