TermiosHelper::~TermiosHelper()
{
// It is good practice to reset a serial port back to the state in
// which you found it. This is why we saved the original termios struct
// The constant TCSANOW (defined in termios.h) indicates that
// the change should take effect immediately.
restoreTermios();
delete originalAttrs_;
delete currentAttrs_;
}
void
parent(int pid, int pty)
{
unsigned char buf[BUFFER_SIZE];
int i;
int val;
int rc;
if(verbose) {
reportIso2022(outputState);
}
#ifdef SIGWINCH
installHandler(SIGWINCH, sigwinchHandler);
#endif
installHandler(SIGCHLD, sigchldHandler);
rc = copyTermios(0, pty);
if(rc < 0)
FatalError("Couldn't copy terminal settings\n");
rc = setRawTermios();
if(rc < 0)
FatalError("Couldn't set terminal to raw\n");
val = fcntl(0, F_GETFL, 0);
if(val >= 0) {
fcntl(0, F_SETFL, val | O_NONBLOCK);
}
val = fcntl(pty, F_GETFL, 0);
if(val >= 0) {
fcntl(pty, F_SETFL, val | O_NONBLOCK);
}
setWindowSize(0, pty);
for(;;) {
rc = waitForInput(0, pty);
if(sigwinch_queued) {
sigwinch_queued = 0;
setWindowSize(0, pty);
}
if(sigchld_queued && exitOnChild)
break;
if(rc > 0) {
if(rc & 2) {
i = read(pty, buf, BUFFER_SIZE);
if((i == 0) || ((i < 0) && (errno != EAGAIN)))
break;
if(i > 0)
copyOut(outputState, 0, buf, i);
}
if(rc & 1) {
i = read(0, buf, BUFFER_SIZE);
if((i == 0) || ((i < 0) && (errno != EAGAIN)))
break;
if(i > 0)
copyIn(inputState, pty, buf, i);
}
}
}
restoreTermios();
}
