void
VolumeManager::OnLineRead(int aFd, nsDependentCSubstring& aMessage)
{
MOZ_ASSERT(aFd == mSocket.get());
char* endPtr;
int responseCode = strtol(aMessage.Data(), &endPtr, 10);
if (*endPtr == ' ') {
endPtr++;
}
// Now fish out the rest of the line after the response code
nsDependentCString responseLine(endPtr, aMessage.Length() - (endPtr - aMessage.Data()));
DBG("Rcvd: %d '%s'", responseCode, responseLine.Data());
if (responseCode >= ::ResponseCode::UnsolicitedInformational) {
// These are unsolicited broadcasts. We intercept these and process
// them ourselves
HandleBroadcast(responseCode, responseLine);
} else {
// Everything else is considered to be part of the command response.
if (mCommands.size() > 0) {
VolumeCommand* cmd = mCommands.front();
cmd->HandleResponse(responseCode, responseLine);
if (responseCode >= ::ResponseCode::CommandOkay) {
// That's a terminating response. We can remove the command.
mCommands.pop();
mCommandPending = false;
// Start the next command, if there is one.
WriteCommandData();
}
} else {
ERR("Response with no command");
}
}
}
void
VolumeManager::OnFileCanWriteWithoutBlocking(int aFd)
{
MOZ_ASSERT(aFd == mSocket.get());
WriteCommandData();
}
void
VolumeManager::OnFileCanReadWithoutBlocking(int aFd)
{
MOZ_ASSERT(aFd == mSocket.get());
while (true) {
ssize_t bytesRemaining = read(aFd, &mRcvBuf[mRcvIdx], sizeof(mRcvBuf) - mRcvIdx);
if (bytesRemaining < 0) {
if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) {
return;
}
if (errno == EINTR) {
continue;
}
ERR("Unknown read error: %d (%s) - restarting", errno, strerror(errno));
Restart();
return;
}
if (bytesRemaining == 0) {
// This means that vold probably crashed
ERR("Vold appears to have crashed - restarting");
Restart();
return;
}
// We got some data. Each line is terminated by a null character
DBG("Read %ld bytes", bytesRemaining);
while (bytesRemaining > 0) {
bytesRemaining--;
if (mRcvBuf[mRcvIdx] == '\0') {
// We found a line terminator. Each line is formatted as an
// integer response code followed by the rest of the line.
// Fish out the response code.
char *endPtr;
int responseCode = strtol(mRcvBuf, &endPtr, 10);
if (*endPtr == ' ') {
endPtr++;
}
// Now fish out the rest of the line after the response code
nsDependentCString responseLine(endPtr, &mRcvBuf[mRcvIdx] - endPtr);
DBG("Rcvd: %d '%s'", responseCode, responseLine.Data());
if (responseCode >= ResponseCode::UnsolicitedInformational) {
// These are unsolicited broadcasts. We intercept these and process
// them ourselves
HandleBroadcast(responseCode, responseLine);
} else {
// Everything else is considered to be part of the command response.
if (mCommands.size() > 0) {
VolumeCommand *cmd = mCommands.front();
cmd->HandleResponse(responseCode, responseLine);
if (responseCode >= ResponseCode::CommandOkay) {
// That's a terminating response. We can remove the command.
mCommands.pop();
mCommandPending = false;
// Start the next command, if there is one.
WriteCommandData();
}
} else {
ERR("Response with no command");
}
}
if (bytesRemaining > 0) {
// There is data in the receive buffer beyond the current line.
// Shift it down to the beginning.
memmove(&mRcvBuf[0], &mRcvBuf[mRcvIdx + 1], bytesRemaining);
}
mRcvIdx = 0;
} else {
mRcvIdx++;
}
}
}
}
