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/* Copyright (C) 2002-2004 RealVNC Ltd. All Rights Reserved.
*
* This 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.
*
* This software 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 this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
//
// All-new VNC viewer for X.
//
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <rfb/Logger_stdio.h>
#include <rfb/LogWriter.h>
#include <network/TcpSocket.h>
#include "TXWindow.h"
#include "CConn.h"
rfb::LogWriter vlog("main");
using namespace network;
using namespace rfb;
IntParameter pointerEventInterval("PointerEventInterval",
"Time in milliseconds to rate-limit"
" successive pointer events", 0);
IntParameter wmDecorationWidth("WMDecorationWidth", "Width of window manager "
"decoration around a window", 6);
IntParameter wmDecorationHeight("WMDecorationHeight", "Height of window "
"manager decoration around a window", 24);
StringParameter passwordFile("PasswordFile",
"Password file for VNC authentication", "");
AliasParameter rfbauth("passwd", "Alias for PasswordFile", &passwordFile);
BoolParameter useLocalCursor("UseLocalCursor",
"Render the mouse cursor locally", true);
BoolParameter dotWhenNoCursor("DotWhenNoCursor",
"Show the dot cursor when the server sends an "
"invisible cursor", true);
BoolParameter autoSelect("AutoSelect",
"Auto select pixel format and encoding", true);
BoolParameter fullColour("FullColour",
"Use full colour - otherwise low colour level is used"
" until AutoSelect decides the link is fast enough",
false);
AliasParameter fullColor("FullColor", "Alias for FullColour", &fullColour);
IntParameter lowColourLevel("LowColourLevel",
"Colour level to use on slow connections. "
"0 = Very Low (8 colours), 1 = Low (64 colours), "
"2 = Medium (256 colours)", 1);
StringParameter preferredEncoding("PreferredEncoding",
"Preferred encoding to use (ZRLE, hextile or"
" raw) - implies AutoSelect=0", "");
BoolParameter fullScreen("FullScreen", "Full screen mode", false);
BoolParameter viewOnly("ViewOnly",
"Don't send any mouse or keyboard events to the server",
false);
BoolParameter shared("Shared",
"Don't disconnect other viewers upon connection - "
"share the desktop instead",
false);
BoolParameter acceptClipboard("AcceptClipboard",
"Accept clipboard changes from the server",
true);
BoolParameter sendClipboard("SendClipboard",
"Send clipboard changes to the server", true);
BoolParameter sendPrimary("SendPrimary",
"Send the primary selection and cut buffer to the "
"server as well as the clipboard selection",
true);
BoolParameter listenMode("listen", "Listen for connections from VNC servers",
false);
StringParameter geometry("geometry", "X geometry specification", "");
StringParameter displayname("display", "The X display", "");
IntParameter qualityLevel("QualityLevel",
"JPEG quality level. "
"0 = Low, 9 = High",
5);
char aboutText[256];
char* programName;
extern char buildtime[];
static void CleanupSignalHandler(int sig)
{
// CleanupSignalHandler allows C++ object cleanup to happen because it calls
// exit() rather than the default which is to abort.
vlog.info("CleanupSignalHandler called");
exit(1);
}
// XLoginIconifier is a class which iconifies the XDM login window when it has
// grabbed the keyboard, thus releasing the grab, allowing the viewer to use
// the keyboard. It remaps the xlogin window on exit.
class XLoginIconifier {
public:
Display* dpy;
Window xlogin;
XLoginIconifier() : dpy(0), xlogin(0) {}
void iconify(Display* dpy_) {
dpy = dpy_;
if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), False, GrabModeSync,
GrabModeSync, CurrentTime) == GrabSuccess) {
XUngrabKeyboard(dpy, CurrentTime);
} else {
xlogin = TXWindow::windowWithName(dpy, DefaultRootWindow(dpy), "xlogin");
if (xlogin) {
XIconifyWindow(dpy, xlogin, DefaultScreen(dpy));
XSync(dpy, False);
}
}
}
~XLoginIconifier() {
if (xlogin) {
fprintf(stderr,"~XLoginIconifier remapping xlogin\n");
XMapWindow(dpy, xlogin);
XFlush(dpy);
sleep(1);
}
}
};
static XLoginIconifier xloginIconifier;
static void usage()
{
fprintf(stderr,
"\nusage: %s [parameters] [host:displayNum] [parameters]\n"
" %s [parameters] -listen [port] [parameters]\n",
programName,programName);
fprintf(stderr,"\n"
"Parameters can be turned on with -<param> or off with -<param>=0\n"
"Parameters which take a value can be specified as "
"-<param> <value>\n"
"Other valid forms are <param>=<value> -<param>=<value> "
"--<param>=<value>\n"
"Parameter names are case-insensitive. The parameters are:\n\n");
Configuration::listParams(79, 14);
exit(1);
}
int main(int argc, char** argv)
{
sprintf(aboutText, "VNC viewer for X version 4.0 - built %s\n"
"Copyright (C) 2002-2004 RealVNC Ltd.\n"
"See http://www.realvnc.com for information on VNC.",
buildtime);
fprintf(stderr,"\n%s\n", aboutText);
rfb::initStdIOLoggers();
rfb::LogWriter::setLogParams("*:stderr:30");
signal(SIGHUP, CleanupSignalHandler);
signal(SIGINT, CleanupSignalHandler);
signal(SIGTERM, CleanupSignalHandler);
programName = argv[0];
char* vncServerName = 0;
Display* dpy;
for (int i = 1; i < argc; i++) {
if (Configuration::setParam(argv[i]))
continue;
if (argv[i][0] == '-') {
if (i+1 < argc) {
if (Configuration::setParam(&argv[i][1], argv[i+1])) {
i++;
continue;
}
}
usage();
}
if (vncServerName)
usage();
vncServerName = argv[i];
}
try {
TcpSocket::initTcpSockets();
Socket* sock = 0;
if (listenMode) {
int port = 5500;
if (vncServerName && isdigit(vncServerName[0]))
port = atoi(vncServerName);
TcpListener listener(port);
vlog.info("Listening on port %d\n",port);
while (true) {
sock = listener.accept();
int pid = fork();
if (pid < 0) { perror("fork"); exit(1); }
if (pid == 0) break; // child
delete sock;
int status;
while (wait3(&status, WNOHANG, 0) > 0) ;
}
}
CharArray displaynameStr(displayname.getData());
if (!(dpy = XOpenDisplay(TXWindow::strEmptyToNull(displaynameStr.buf)))) {
fprintf(stderr,"%s: unable to open display \"%s\"\n",
programName, XDisplayName(displaynameStr.buf));
exit(1);
}
TXWindow::init(dpy, "Vncviewer");
xloginIconifier.iconify(dpy);
CConn cc(dpy, argc, argv, sock, vncServerName);
// X events are processed whenever reading from the socket would block.
while (true) {
cc.getInStream()->check(1);
cc.processMsg();
}
} catch (rdr::Exception &e) {
vlog.error(e.str());
}
return 0;
}
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