1 files changed, 70 insertions, 0 deletions
diff --git a/tools/android/common/daemon.cc b/tools/android/common/daemon.cc
new file mode 100644
index 0000000..c332b1f
--- /dev/null
+++ b/tools/android/common/daemon.cc
@@ -0,0 +1,70 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "tools/android/common/daemon.h"
+
+#include <signal.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "base/command_line.h"
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+
+namespace {
+
+const char kNoSpawnDaemon[] = "D";
+
+int g_exit_status = 0;
+
+void Exit(int unused) {
+  _exit(g_exit_status);
+}
+
+}  // namespace
+
+namespace tools {
+
+bool HasHelpSwitch(const CommandLine& command_line) {
+  return command_line.HasSwitch("h") || command_line.HasSwitch("help");
+}
+
+bool HasNoSpawnDaemonSwitch(const CommandLine& command_line) {
+  return command_line.HasSwitch(kNoSpawnDaemon);
+}
+
+void ShowHelp(const char* program,
+              const char* extra_title,
+              const char* extra_descriptions) {
+  printf("Usage: %s [-%s] %s\n"
+         " -%s  stops from spawning a daemon process\n%s",
+         program, kNoSpawnDaemon, extra_title, kNoSpawnDaemon,
+         extra_descriptions);
+}
+
+void SpawnDaemon(int exit_status) {
+  g_exit_status = exit_status;
+  signal(SIGUSR1, Exit);
+
+  if (fork()) {
+    // In parent process.
+    sleep(10);  // Wait for the child process to finish setsid().
+    NOTREACHED();
+  }
+
+  // In child process.
+  setsid();  // Detach the child process from its parent.
+  kill(getppid(), SIGUSR1);  // Inform the parent process to exit.
+
+  // Close the standard input and outputs, otherwise the process may block
+  // adbd when the shell exits.
+  // Comment out these lines if you want to see outputs for debugging.
+  HANDLE_EINTR(close(0));
+  HANDLE_EINTR(close(1));
+  HANDLE_EINTR(close(2));
+}
+
+}  // namespace tools
+