OSX: Close ipc channel if we're writing to a closed pipe.

chrome/common/ipc_channel_posix.cc

 // Copyright (c) 2008 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 "chrome/common/ipc_channel_posix.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <sys/types.h>
@@ skipping 589 matching lines @@
       msgh.msg_controllen = cmsg->cmsg_len;
 
       msg->header()->num_fds = num_fds;
     }
 
     ssize_t bytes_written = HANDLE_EINTR(sendmsg(pipe_, &msgh, MSG_DONTWAIT));
     if (bytes_written > 0)
       msg->file_descriptor_set()->CommitAll();
 
     if (bytes_written < 0 && errno != EAGAIN) {
+#if defined(OS_MACOSX)
+      // On OSX writing to a pipe with no listener returns EPERM.
+      if (errno == EPERM) {
+        Close();
+        return false;
+      }
+#endif  // OS_MACOSX
       LOG(ERROR) << "pipe error: " << strerror(errno);
       return false;
     }
 
     if (static_cast<size_t>(bytes_written) != amt_to_write) {
       if (bytes_written > 0) {
         // If write() fails with EAGAIN then bytes_written will be -1.
         message_send_bytes_written_ += bytes_written;
       }
 
@@ skipping 174 matching lines @@
 
 bool Channel::Send(Message* message) {
   return channel_impl_->Send(message);
 }
 
 void Channel::GetClientFileDescriptorMapping(int *src_fd, int *dest_fd) const {
   return channel_impl_->GetClientFileDescriptorMapping(src_fd, dest_fd);
 }
 
 }  // namespace IPC