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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /ipc/glue/Transport_posix.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'ipc/glue/Transport_posix.cpp')
-rw-r--r--ipc/glue/Transport_posix.cpp93
1 files changed, 93 insertions, 0 deletions
diff --git a/ipc/glue/Transport_posix.cpp b/ipc/glue/Transport_posix.cpp
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+++ b/ipc/glue/Transport_posix.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <unistd.h>
+
+#include <string>
+
+#include "base/eintr_wrapper.h"
+
+#include "mozilla/ipc/Transport.h"
+#include "mozilla/ipc/FileDescriptor.h"
+#include "ProtocolUtils.h"
+
+using namespace std;
+
+using base::ProcessHandle;
+
+namespace mozilla {
+namespace ipc {
+
+nsresult
+CreateTransport(base::ProcessId aProcIdOne,
+ TransportDescriptor* aOne,
+ TransportDescriptor* aTwo)
+{
+ wstring id = IPC::Channel::GenerateVerifiedChannelID(std::wstring());
+ // Use MODE_SERVER to force creation of the socketpair
+ Transport t(id, Transport::MODE_SERVER, nullptr);
+ int fd1 = t.GetFileDescriptor();
+ int fd2, dontcare;
+ t.GetClientFileDescriptorMapping(&fd2, &dontcare);
+ if (fd1 < 0 || fd2 < 0) {
+ return NS_ERROR_TRANSPORT_INIT;
+ }
+
+ // The Transport closes these fds when it goes out of scope, so we
+ // dup them here
+ fd1 = dup(fd1);
+ if (fd1 < 0) {
+ AnnotateCrashReportWithErrno("IpcCreateTransportDupErrno", errno);
+ }
+ fd2 = dup(fd2);
+ if (fd2 < 0) {
+ AnnotateCrashReportWithErrno("IpcCreateTransportDupErrno", errno);
+ }
+
+ if (fd1 < 0 || fd2 < 0) {
+ HANDLE_EINTR(close(fd1));
+ HANDLE_EINTR(close(fd2));
+ return NS_ERROR_DUPLICATE_HANDLE;
+ }
+
+ aOne->mFd = base::FileDescriptor(fd1, true/*close after sending*/);
+ aTwo->mFd = base::FileDescriptor(fd2, true/*close after sending*/);
+ return NS_OK;
+}
+
+UniquePtr<Transport>
+OpenDescriptor(const TransportDescriptor& aTd, Transport::Mode aMode)
+{
+ return MakeUnique<Transport>(aTd.mFd.fd, aMode, nullptr);
+}
+
+UniquePtr<Transport>
+OpenDescriptor(const FileDescriptor& aFd, Transport::Mode aMode)
+{
+ auto rawFD = aFd.ClonePlatformHandle();
+ return MakeUnique<Transport>(rawFD.release(), aMode, nullptr);
+}
+
+TransportDescriptor
+DuplicateDescriptor(const TransportDescriptor& aTd)
+{
+ TransportDescriptor result = aTd;
+ result.mFd.fd = dup(aTd.mFd.fd);
+ if (result.mFd.fd == -1) {
+ AnnotateSystemError();
+ }
+ MOZ_RELEASE_ASSERT(result.mFd.fd != -1, "DuplicateDescriptor failed");
+ return result;
+}
+
+void
+CloseDescriptor(const TransportDescriptor& aTd)
+{
+ close(aTd.mFd.fd);
+}
+
+} // namespace ipc
+} // namespace mozilla