162 lines
4.1 KiB
C++
162 lines
4.1 KiB
C++
/*
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* Copyright (C) 2002-2004,2007-2011,2013,2014-2017,2019,2020 by Jonathan Naylor G4KLX
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* Copyright (C) 1999-2001 by Thomas Sailor HB9JNX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#if !defined(_WIN32) && !defined(_WIN64)
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#include "SerialController.h"
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#include "Log.h"
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#include <cstring>
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#include <cassert>
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#include <cstdlib>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <cerrno>
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#include <fcntl.h>
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#include <unistd.h>
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#include <termios.h>
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CPseudoTTYController::CPseudoTTYController(const std::string& device, unsigned int speed, bool assertRTS) :
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CSerialController(device, speed, assertRTS)
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{
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}
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CPseudoTTYController::~CPseudoTTYController()
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{
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}
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bool CPseudoTTYController::open()
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{
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assert(m_fd == -1);
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m_fd = ::posix_openpt(O_RDWR | O_NOCTTY | O_NDELAY);
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if (m_fd < 0) {
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LogError("Cannot open device - %s", m_device.c_str());
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return false;
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}
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std::string slave = std::string(::ptsname(m_fd));
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// Remove any previous stale symlink
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::unlink(m_device.c_str());
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int ret = ::symlink(slave.c_str(), m_device.c_str());
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if (ret != 0) {
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LogError("Cannot make symlink to %s with %s", slave.c_str(), m_device.c_str());
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close();
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return false;
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}
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m_device = std::string(::ttyname(m_fd));
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if (::isatty(m_fd)) {
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termios termios;
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if (::tcgetattr(m_fd, &termios) < 0) {
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LogError("Cannot get the attributes for %s", m_device.c_str());
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::close(m_fd);
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return false;
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}
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termios.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK);
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termios.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL);
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termios.c_iflag &= ~(IXON | IXOFF | IXANY);
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termios.c_oflag &= ~(OPOST);
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termios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CRTSCTS);
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termios.c_cflag |= (CS8 | CLOCAL | CREAD);
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termios.c_lflag &= ~(ISIG | ICANON | IEXTEN);
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termios.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
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termios.c_cc[VMIN] = 0;
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termios.c_cc[VTIME] = 10;
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switch (m_speed) {
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case 1200U:
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::cfsetospeed(&termios, B1200);
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::cfsetispeed(&termios, B1200);
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break;
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case 2400U:
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::cfsetospeed(&termios, B2400);
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::cfsetispeed(&termios, B2400);
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break;
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case 4800U:
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::cfsetospeed(&termios, B4800);
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::cfsetispeed(&termios, B4800);
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break;
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case 9600U:
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::cfsetospeed(&termios, B9600);
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::cfsetispeed(&termios, B9600);
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break;
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case 19200U:
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::cfsetospeed(&termios, B19200);
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::cfsetispeed(&termios, B19200);
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break;
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case 38400U:
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::cfsetospeed(&termios, B38400);
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::cfsetispeed(&termios, B38400);
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break;
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case 115200U:
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::cfsetospeed(&termios, B115200);
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::cfsetispeed(&termios, B115200);
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break;
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case 230400U:
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::cfsetospeed(&termios, B230400);
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::cfsetispeed(&termios, B230400);
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break;
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case 460800U:
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::cfsetospeed(&termios, B460800);
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::cfsetispeed(&termios, B460800);
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break;
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default:
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LogError("Unsupported serial port speed - %u", m_speed);
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::close(m_fd);
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return false;
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}
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if (::tcsetattr(m_fd, TCSANOW, &termios) < 0) {
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LogError("Cannot set the attributes for %s", m_device.c_str());
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::close(m_fd);
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return false;
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}
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if (m_assertRTS) {
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unsigned int y;
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if (::ioctl(m_fd, TIOCMGET, &y) < 0) {
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LogError("Cannot get the control attributes for %s", m_device.c_str());
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::close(m_fd);
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return false;
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}
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y |= TIOCM_RTS;
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if (::ioctl(m_fd, TIOCMSET, &y) < 0) {
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LogError("Cannot set the control attributes for %s", m_device.c_str());
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::close(m_fd);
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return false;
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}
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}
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}
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return true;
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}
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#endif
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