bool
nsTemporaryFileInputStream::Deserialize(const InputStreamParams& aParams,
const FileDescriptorArray& aFileDescriptors)
{
const TemporaryFileInputStreamParams& params = aParams.get_TemporaryFileInputStreamParams();
uint32_t fileDescriptorIndex = params.fileDescriptorIndex();
FileDescriptor fd;
if (fileDescriptorIndex < aFileDescriptors.Length()) {
fd = aFileDescriptors[fileDescriptorIndex];
NS_WARN_IF_FALSE(fd.IsValid(), "Received an invalid file descriptor!");
} else {
NS_WARNING("Received a bad file descriptor index!");
}
if (fd.IsValid()) {
auto rawFD = fd.ClonePlatformHandle();
PRFileDesc* fileDesc = PR_ImportFile(PROsfd(rawFD.release()));
if (!fileDesc) {
NS_WARNING("Failed to import file handle!");
return false;
}
mFileDescOwner = new FileDescOwner(fileDesc);
} else {
mClosed = true;
}
mStartPos = mCurPos = params.startPos();
mEndPos = params.endPos();
return true;
}
mozilla::ipc::IPCResult
TemporaryIPCBlobParent::RecvOperationDone(const nsCString& aContentType,
const FileDescriptor& aFD)
{
MOZ_ASSERT(mActive);
mActive = false;
// We have received a file descriptor because in this way we have kept the
// file locked on windows during the IPC communication. After the creation of
// the TemporaryFileBlobImpl, this prfile can be closed.
auto rawFD = aFD.ClonePlatformHandle();
PRFileDesc* prfile = PR_ImportFile(PROsfd(rawFD.release()));
// Let's create the BlobImpl.
nsCOMPtr<nsIFile> file = Move(mFile);
RefPtr<TemporaryFileBlobImpl> blobImpl =
new TemporaryFileBlobImpl(file, NS_ConvertUTF8toUTF16(aContentType));
PR_Close(prfile);
IPCBlob ipcBlob;
nsresult rv = IPCBlobUtils::Serialize(blobImpl, Manager(), ipcBlob);
if (NS_WARN_IF(NS_FAILED(rv))) {
Unused << Send__delete__(this, NS_ERROR_FAILURE);
return IPC_OK();
}
Unused << Send__delete__(this, ipcBlob);
return IPC_OK();
}
bool
nsFileInputStream::Deserialize(const InputStreamParams& aParams,
const FileDescriptorArray& aFileDescriptors)
{
NS_ASSERTION(!mFD, "Already have a file descriptor?!");
NS_ASSERTION(!mDeferredOpen, "Deferring open?!");
NS_ASSERTION(!mFile, "Should never have a file here!");
NS_ASSERTION(!mPerm, "This should always be 0!");
if (aParams.type() != InputStreamParams::TFileInputStreamParams) {
NS_WARNING("Received unknown parameters from the other process!");
return false;
}
const FileInputStreamParams& params = aParams.get_FileInputStreamParams();
uint32_t fileDescriptorIndex = params.fileDescriptorIndex();
FileDescriptor fd;
if (fileDescriptorIndex < aFileDescriptors.Length()) {
fd = aFileDescriptors[fileDescriptorIndex];
NS_WARNING_ASSERTION(fd.IsValid(),
"Received an invalid file descriptor!");
} else {
NS_WARNING("Received a bad file descriptor index!");
}
if (fd.IsValid()) {
auto rawFD = fd.ClonePlatformHandle();
PRFileDesc* fileDesc = PR_ImportFile(PROsfd(rawFD.release()));
if (!fileDesc) {
NS_WARNING("Failed to import file handle!");
return false;
}
mFD = fileDesc;
}
mBehaviorFlags = params.behaviorFlags();
if (!XRE_IsParentProcess()) {
// A child process shouldn't close when it reads the end because it will
// not be able to reopen the file later.
mBehaviorFlags &= ~nsIFileInputStream::CLOSE_ON_EOF;
// A child process will not be able to reopen the file so this flag is
// meaningless.
mBehaviorFlags &= ~nsIFileInputStream::REOPEN_ON_REWIND;
}
mIOFlags = params.ioFlags();
return true;
}
UniquePtr<Transport>
OpenDescriptor(const FileDescriptor& aFd, Transport::Mode aMode)
{
auto rawFD = aFd.ClonePlatformHandle();
return MakeUnique<Transport>(rawFD.release(), aMode, nullptr);
}
