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ptyiface.cpp
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/*
Copyright 2011-2012 Heikki Holstila <heikki.holstila@gmail.com>
This file is part of FingerTerm.
FingerTerm is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
FingerTerm is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FingerTerm. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QCoreApplication>
extern "C" {
#include <pty.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/wait.h>
}
#include "terminal.h"
#include "ptyiface.h"
static bool childProcessQuit = false;
static int childProcessPid = 0;
void sighandler(int sig)
{
if(sig==SIGCHLD) {
int pid = wait(NULL);
if(pid > 0 && childProcessPid > 0 && pid==childProcessPid) {
childProcessQuit = true;
childProcessPid = 0;
qApp->quit();
}
}
}
PtyIFace::PtyIFace(int pid, int masterFd, Terminal *term, QString charset, QObject *parent) :
QObject(parent),
iTerm(term),
iPid(pid),
iMasterFd(masterFd),
iFailed(false),
iReadNotifier(0),
iTextCodec(0)
{
childProcessPid = iPid;
if(!iTerm || childProcessQuit) {
iFailed = true;
qFatal("PtyIFace: null Terminal pointer");
}
iTerm->setPtyIFace(this);
resize(iTerm->termSize());
connect(iTerm,SIGNAL(termSizeChanged(QSize)),this,SLOT(resize(QSize)));
iReadNotifier = new QSocketNotifier(iMasterFd, QSocketNotifier::Read, this);
connect(iReadNotifier,SIGNAL(activated(int)),this,SLOT(readActivated()));
signal(SIGCHLD,&sighandler);
fcntl(iMasterFd, F_SETFL, O_NONBLOCK); // reads from the descriptor should be non-blocking
if (!charset.isEmpty())
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iTextCodec = QTextCodec::codecForName(charset.toLatin1());
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if (!iTextCodec)
iTextCodec = QTextCodec::codecForName("UTF-8");
if (!iTextCodec)
qFatal("No valid text codec");
}
PtyIFace::~PtyIFace()
{
if(!childProcessQuit) {
// make the process quit
kill(iPid, SIGHUP);
kill(iPid, SIGTERM);
int status=0;
waitpid(-1,&status,0);
}
}
void PtyIFace::readActivated()
{
QByteArray data;
readTerm(data);
if(iTerm)
iTerm->insertInBuffer( iTextCodec->toUnicode(data) );
}
void PtyIFace::resize(QSize newSize)
{
if(childProcessQuit)
return;
winsize winp;
winp.ws_col = newSize.width();
winp.ws_row = newSize.height();
ioctl(iMasterFd, TIOCSWINSZ, &winp);
}
void PtyIFace::writeTerm(const QString &chars)
{
writeTerm( iTextCodec->fromUnicode(chars) );
}
void PtyIFace::writeTerm(const QByteArray &chars)
{
if(childProcessQuit)
return;
int ret = write(iMasterFd, chars, chars.size());
if(ret != chars.size())
qDebug() << "write error!";
}
void PtyIFace::readTerm(QByteArray &chars)
{
if(childProcessQuit)
return;
int ret = 0;
char ch[64];
while(ret != -1) {
ret = read(iMasterFd, &ch, 64);
if(ret > 0)
chars.append((char*)&ch, ret);
}
}