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/*
* Copyright Johannes Sixt
* This file is licensed under the GNU General Public License Version 2.
* See the file COPYING in the toplevel directory of the source directory.
*/
#include <ntqsocketnotifier.h>
#include <ntqpopupmenu.h>
#include "ttywnd.h"
#include <tdeglobalsettings.h>
#include <tdelocale.h>
#include "config.h"
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* open, close, etc. */
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_PTY_H
#include <pty.h> /* openpty on Linux */
#endif
#ifdef HAVE_LIBUTIL_H
#include <libutil.h> /* openpty on FreeBSD */
#endif
#ifdef HAVE_UTIL_H /* openpty on NetBSD, OpenBSD */
#include <util.h>
#endif
#include <errno.h>
#include "mydebug.h"
STTY::STTY() :
TQObject(),
m_masterfd(-1),
m_slavefd(-1),
m_outNotifier(0)
{
if (findTTY())
{
::fcntl(m_masterfd, F_SETFL, O_NDELAY);
m_outNotifier = new TQSocketNotifier(m_masterfd, TQSocketNotifier::Read);
connect(m_outNotifier, SIGNAL(activated(int)), SLOT(outReceived(int)));
} else {
m_slavetty = TQString();
}
}
STTY::~STTY()
{
if (m_outNotifier) {
::close(m_masterfd);
if (m_slavefd >= 0)
::close(m_slavefd);
delete m_outNotifier;
}
}
bool STTY::findTTY()
{
m_masterfd = -1;
#ifdef HAVE_FUNC_OPENPTY
/* use glibc2's openpty */
if (m_masterfd < 0)
{
if (::openpty(&m_masterfd, &m_slavefd, 0, 0, 0) == 0) {
const char* tname = ::ttyname(m_slavefd);
if (tname != 0) {
m_slavetty = tname;
} else {
::close(m_slavefd);
::close(m_masterfd);
m_masterfd = m_slavefd = -1;
}
}
}
#endif
// resort to BSD-style terminals
if (m_masterfd < 0)
{
const char* s3;
const char* s4;
char ptynam[] = "/dev/ptyxx";
char ttynam[] = "/dev/ttyxx";
static const char ptyc3[] = "pqrstuvwxyzabcde";
static const char ptyc4[] = "0123456789abcdef";
// Find a master pty that we can open
for (s3 = ptyc3; *s3 != 0 && m_masterfd < 0; s3++)
{
for (s4 = ptyc4; *s4 != 0; s4++)
{
ptynam[8] = ttynam[8] = *s3;
ptynam[9] = ttynam[9] = *s4;
if ((m_masterfd = ::open(ptynam,O_RDWR)) >= 0)
{
if (::geteuid() == 0 || ::access(ttynam,R_OK|W_OK) == 0)
{
m_slavetty = ttynam;
break;
}
::close(m_masterfd);
m_masterfd = -1;
}
}
}
}
return m_masterfd >= 0;
}
void STTY::outReceived(int f)
{
for (;;) {
char buf[1024];
int n = ::read(f, buf, sizeof(buf));
if (n < 0) {
if (errno != EAGAIN) { /* this is not an error */
// ugh! error! somebody disconnect this signal please!
}
break;
}
emit output(buf, n);
if (n == 0)
break;
}
}
TTYWindow::TTYWindow(TQWidget* parent, const char* name) :
TQTextEdit(parent, name),
m_tty(0),
m_hPos(0)
{
setFont(TDEGlobalSettings::fixedFont());
setReadOnly(true);
setAutoFormatting(AutoNone);
setTextFormat(PlainText);
setWordWrap(NoWrap);
}
TTYWindow::~TTYWindow()
{
if (m_tty)
deactivate();
}
TQString TTYWindow::activate()
{
// allocate a pseudo terminal
m_tty = new STTY;
TQString ttyName = m_tty->slaveTTY();
if (ttyName.isEmpty()) {
// failed to allocate terminal
delete m_tty;
m_tty = 0;
return TQString();
} else {
connect(m_tty, SIGNAL(output(char*,int)), SLOT(slotAppend(char*,int)));
return ttyName;
}
}
void TTYWindow::deactivate()
{
delete m_tty;
m_tty = 0;
}
/**
* Note that it is necessary to track the horizontal position explicitly
* since if the user modifies the selected text in the window, the cursor
* position changes, too.
*/
void TTYWindow::slotAppend(char* buffer, int count)
{
// parse off lines
char* start = buffer;
while (count > 0) {
int len = 0;
while (count > 0 && start[len] != '\n' && start[len] != '\r') {
--count;
++len;
}
if (len > 0) {
TQString str = TQString::fromLatin1(start, len);
// replace text in the last line
int para = paragraphs()-1;
// this selection is non-empty only after a '\r' that was not
// followed by a '\n'
setSelection(para, m_hPos, para, m_hPos+len, 1);
removeSelectedText(1);
insertAt(str, para, m_hPos);
m_hPos += len;
start += len;
len = 0;
}
if (count > 0 && *start == '\r') {
++start;
--count;
m_hPos = 0;
}
if (count > 0 && *start == '\n') {
++start;
--count;
append(TQString());
m_hPos = 0;
}
}
}
TQPopupMenu* TTYWindow::createPopupMenu(const TQPoint& pos)
{
TQPopupMenu* menu = TQTextEdit::createPopupMenu(pos);
menu->insertSeparator();
menu->insertItem(i18n("&Clear"), this, SLOT(slotClear()));
return menu;
}
void TTYWindow::slotClear()
{
clear();
m_hPos = 0;
}
#include "ttywnd.moc"
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