1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "sandbox/linux/syscall_broker/broker_channel.h"
6 
7 #include <sys/socket.h>
8 #include <sys/types.h>
9 
10 #include "base/logging.h"
11 
12 namespace sandbox {
13 
14 namespace syscall_broker {
15 
16 // static
CreatePair(EndPoint * reader,EndPoint * writer)17 void BrokerChannel::CreatePair(EndPoint* reader, EndPoint* writer) {
18   DCHECK(reader);
19   DCHECK(writer);
20   int socket_pair[2];
21   // Use SOCK_SEQPACKET, to preserve message boundaries but we also want to be
22   // notified (recvmsg should return and not block) when the connection has
23   // been broken which could mean that the other end has been closed.
24   PCHECK(0 == socketpair(AF_UNIX, SOCK_SEQPACKET, 0, socket_pair));
25 
26   reader->reset(socket_pair[0]);
27   PCHECK(0 == shutdown(reader->get(), SHUT_WR));
28 
29   writer->reset(socket_pair[1]);
30   PCHECK(0 == shutdown(writer->get(), SHUT_RD));
31 }
32 
33 }  // namespace syscall_broker
34 
35 }  // namespace sandbox
36