public int ioctl(int fd, int cmd, int[] arg) {
Port port = getPort(fd);
if (port == null) return -1;
try {
if (cmd == FIONREAD) {
clearCommErrors(port);
arg[0] = port.m_COMSTAT.cbInQue;
return 0;
} else if (cmd == TIOCMSET) {
int a = arg[0];
if ((a & TIOCM_DTR) != 0) port.MSR |= TIOCM_DTR;
else port.MSR &= ~TIOCM_DTR;
if (!EscapeCommFunction(port.m_Comm, ((a & TIOCM_DTR) != 0) ? SETDTR : CLRDTR)) port.fail();
if ((a & TIOCM_RTS) != 0) port.MSR |= TIOCM_RTS;
else port.MSR &= ~TIOCM_RTS;
if (!EscapeCommFunction(port.m_Comm, ((a & TIOCM_RTS) != 0) ? SETRTS : CLRRTS)) port.fail();
return 0;
} else if (cmd == TIOCMGET) {
int[] stat = {0};
if (!GetCommModemStatus(port.m_Comm, stat)) port.fail();
int s = stat[0];
int a = arg[0];
if ((s & MS_RLSD_ON) != 0) a |= TIOCM_CAR;
else a &= ~TIOCM_CAR;
if ((s & MS_RING_ON) != 0) a |= TIOCM_RNG;
else a &= ~TIOCM_RNG;
if ((s & MS_DSR_ON) != 0) a |= TIOCM_DSR;
else a &= ~TIOCM_DSR;
if ((s & MS_CTS_ON) != 0) a |= TIOCM_CTS;
else a &= ~TIOCM_CTS;
if ((port.MSR & TIOCM_DTR) != 0) a |= TIOCM_DTR;
else a &= ~TIOCM_DTR;
if ((port.MSR & TIOCM_RTS) != 0) a |= TIOCM_RTS;
else a &= ~TIOCM_RTS;
arg[0] = a;
return 0;
} else {
m_ErrNo = ENOTSUP;
return -1;
}
} catch (Fail f) {
return -1;
}
}
