[ChromeOS] Add option to set controlling terminal when launching process.

base/process_util_posix.cc

Index: base/process_util_posix.cc
diff --git a/base/process_util_posix.cc b/base/process_util_posix.cc
index 5a1d4425bbb280f1a501c6bccfa08caf33ee1bcf..47a53c2d4c16c52b2c0de0b024b4e9550b2119d7 100644
--- a/base/process_util_posix.cc
+++ b/base/process_util_posix.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -32,6 +32,10 @@
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread_restrictions.h"
 
+#if defined(OS_CHROMEOS)
+#include <sys/ioctl.h>
+#endif
+
 #if defined(OS_FREEBSD)
 #include <sys/event.h>
 #include <sys/ucontext.h>
@@ -677,6 +681,20 @@ bool LaunchProcess(const std::vector<std::string>& argv,
     // DANGER: no calls to malloc are allowed from now on:
     // http://crbug.com/36678
 
+#if defined(OS_CHROMEOS)
+    if (options.ctrl_terminal_fd >= 0) {
+      // Set process' controlling terminal.
+      if (HANDLE_EINTR(setsid()) != -1) {
+        if (HANDLE_EINTR(
+                ioctl(options.ctrl_terminal_fd, TIOCSCTTY, NULL)) == -1) {
+          RAW_LOG(WARNING, "ioctl(TIOCSCTTY), ctrl terminal not set");
+        }
+      } else {
+        RAW_LOG(WARNING, "setsid failed, ctrl terminal not set");
+      }
+    }
+#endif  // defined(OS_CHROMEOS)
+
     if (options.fds_to_remap) {
       for (file_handle_mapping_vector::const_iterator
                it = options.fds_to_remap->begin();