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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_COMMON_ZYGOTE_ZYGOTE_COMMANDS_LINUX_H_
#define CONTENT_COMMON_ZYGOTE_ZYGOTE_COMMANDS_LINUX_H_
#include <stddef.h>
#include "base/posix/global_descriptors.h"
namespace content {
// Contents of the initial message sent from the zygote to the browser right
// after it starts.
static const char kZygoteBootMessage[] = "ZYGOTE_BOOT";
// Contents of the initial message sent from the zygote to the browser when it
// is ready to go.
static const char kZygoteHelloMessage[] = "ZYGOTE_OK";
// Message sent by zygote children to the browser so the browser can discover
// the sending child's process ID.
static const char kZygoteChildPingMessage[] = "CHILD_PING";
// Maximum allowable length for messages sent to the zygote.
const size_t kZygoteMaxMessageLength = 64 * 1024;
static_assert(kZygoteMaxMessageLength < 200 * 1024,
"Raising kZygoteMaxMessageLength past the maximum single "
"datagram size for a Unix domain socket will cause long "
"messages to be silently truncated. See "
"https://crbug.com/1278226. Values as low as 212992 have "
"been observed in the wild.");
// File descriptors initialized by the Zygote Host
const int kZygoteSocketPairFd = base::GlobalDescriptors::kBaseDescriptor;
// These are the command codes used on the wire between the browser and the
// zygote.
enum {
// Fork off a new renderer.
kZygoteCommandFork = 0,
// Reap a renderer child.
kZygoteCommandReap = 1,
// Check what happened to a child process.
kZygoteCommandGetTerminationStatus = 2,
// Read a bitmask of kSandboxLinux*
kZygoteCommandGetSandboxStatus = 3,
// Not a real zygote command, but a subcommand used during the zygote fork
// protocol. Sends the child's PID as seen from the browser process.
kZygoteCommandForkRealPID = 4,
// Reinitialize logging. Needed on ChromeOS, which switches to a log file
// in the user's home directory once they log in.
kZygoteCommandReinitializeLogging = 5
};
} // namespace content
#endif // CONTENT_COMMON_ZYGOTE_ZYGOTE_COMMANDS_LINUX_H_
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