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

base/process_util_posix.cc

-// 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.
 
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <sys/resource.h>
 #include <sys/time.h>
@@ skipping 13 matching lines @@
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process_util.h"
 #include "base/stringprintf.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #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>
 #endif
 
 #if defined(OS_MACOSX)
 #include <crt_externs.h>
 #include <sys/event.h>
 #else
 extern char** environ;
@@ skipping 625 matching lines @@
     // any hidden calls to malloc.
     void *malloc_thunk =
         reinterpret_cast<void*>(reinterpret_cast<intptr_t>(malloc) & ~4095);
     mprotect(malloc_thunk, 4096, PROT_READ | PROT_WRITE | PROT_EXEC);
     memset(reinterpret_cast<void*>(malloc), 0xff, 8);
 #endif  // 0
 
     // 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();
            it != options.fds_to_remap->end(); ++it) {
         fd_shuffle1.push_back(InjectionArc(it->first, it->second, false));
         fd_shuffle2.push_back(InjectionArc(it->first, it->second, false));
       }
     }
 
 #if defined(OS_MACOSX)
@@ skipping 615 matching lines @@
   if (IsChildDead(process))
     return;
 
   BackgroundReaper* reaper = new BackgroundReaper(process, 0);
   PlatformThread::CreateNonJoinable(0, reaper);
 }
 
 #endif  // !defined(OS_MACOSX)
 
 }  // namespace base