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tdebase/kdesktop/lock/main.cc

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/* This file is part of the KDE project
Copyright (C) 1999 David Faure
Copyright (c) 2003 Oswald Buddenhagen <ossi@kde.org>
Copyright (c) 2010-2012 Timothy Pearson <kb9vqf@pearsoncomputing.net>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include "lockprocess.h"
#include "main.h"
#include "kdesktopsettings.h"
#include <tqfileinfo.h>
#include <tdecmdlineargs.h>
#include <tdelocale.h>
#include <tdeglobal.h>
#include <kdebug.h>
#include <tdeglobalsettings.h>
#include <dcopref.h>
#include <ksimpleconfig.h>
#include <kstandarddirs.h>
#include <tdmtsak.h>
#include <stdlib.h>
#if defined(Q_WS_X11) && defined(HAVE_XRENDER) && TQT_VERSION >= 0x030300
#define COMPOSITE
#endif
#ifdef COMPOSITE
# include <X11/Xlib.h>
# include <X11/extensions/Xrender.h>
# include <fixx11h.h>
# include <dlfcn.h>
#else
# include <X11/Xlib.h>
# include <fixx11h.h>
#endif
#define OPEN_TDMCONFIG_AND_SET_GROUP \
if( stat( KDE_CONFDIR "/tdm/tdmdistrc" , &st ) == 0) { \
tdmconfig = new KSimpleConfig( TQString::fromLatin1( KDE_CONFDIR "/tdm/tdmdistrc" )); \
} \
else { \
tdmconfig = new KSimpleConfig( TQString::fromLatin1( KDE_CONFDIR "/tdm/tdmrc" )); \
} \
tdmconfig->setGroup("X-:*-Greeter");
TQXLibWindowList trinity_desktop_lock_hidden_window_list;
// [FIXME] Add GUI configuration checkboxes for these three settings (see kdesktoprc [ScreenSaver] UseUnmanagedLockWindows, DelaySaverStart, and UseTDESAK)
bool trinity_desktop_lock_use_system_modal_dialogs = FALSE;
bool trinity_desktop_lock_delay_screensaver_start = FALSE;
bool trinity_desktop_lock_use_sak = FALSE;
bool trinity_desktop_lock_hide_active_windows = FALSE;
bool trinity_desktop_lock_hide_cancel_button = FALSE;
bool trinity_desktop_lock_forced = FALSE;
LockProcess* trinity_desktop_lock_process = NULL;
bool signalled_forcelock;
bool signalled_dontlock;
bool signalled_securedialog;
bool signalled_blank;
bool signalled_run;
bool in_internal_mode = FALSE;
bool argb_visual = FALSE;
pid_t kdesktop_pid = -1;
bool trinity_desktop_lock_settings_initialized = FALSE;
static void sigusr1_handler(int)
{
signalled_forcelock = TRUE;
}
static void sigusr2_handler(int)
{
signalled_dontlock = TRUE;
}
static void sigusr3_handler(int)
{
signalled_securedialog = TRUE;
}
static void sigusr4_handler(int)
{
signalled_blank = TRUE;
}
static void sigusr5_handler(int)
{
signalled_run = TRUE;
}
static int trapXErrors(Display *, XErrorEvent *)
{
return 0;
}
bool MyApp::x11EventFilter( XEvent *ev )
{
if (ev->type == ButtonPress || ev->type == ButtonRelease || ev->type == MotionNotify) {
emit mouseInteraction(ev);
}
if (ev->type == XKeyPress || ev->type == ButtonPress) {
emit activity();
}
else if (ev->type == MotionNotify) {
time_t tick = time( 0 );
if (tick != lastTick) {
lastTick = tick;
emit activity();
}
}
else if (ev->type == MapNotify) {
// HACK
// Hide all tooltips and notification windows
XMapEvent map_event = ev->xmap;
XWindowAttributes childAttr;
Window childTransient;
if (XGetWindowAttributes(map_event.display, map_event.window, &childAttr) && XGetTransientForHint(map_event.display, map_event.window, &childTransient)) {
if((childAttr.map_state == IsViewable) && (childAttr.override_redirect) && (childTransient)) {
if (!trinity_desktop_lock_hidden_window_list.contains(map_event.window)) {
trinity_desktop_lock_hidden_window_list.append(map_event.window);
}
XLowerWindow(map_event.display, map_event.window);
XFlush(map_event.display);
}
}
}
else if (ev->type == VisibilityNotify) {
// HACK
// Hide all tooltips and notification windows
XVisibilityEvent visibility_event = ev->xvisibility;
XWindowAttributes childAttr;
Window childTransient;
if ((visibility_event.state == VisibilityUnobscured) || (visibility_event.state == VisibilityPartiallyObscured)) {
if (XGetWindowAttributes(visibility_event.display, visibility_event.window, &childAttr) && XGetTransientForHint(visibility_event.display, visibility_event.window, &childTransient)) {
if((childAttr.map_state == IsViewable) && (childAttr.override_redirect) && (childTransient)) {
if (!trinity_desktop_lock_hidden_window_list.contains(visibility_event.window)) {
trinity_desktop_lock_hidden_window_list.append(visibility_event.window);
}
XLowerWindow(visibility_event.display, visibility_event.window);
XFlush(visibility_event.display);
}
}
}
}
else if (ev->type == CreateNotify) {
// HACK
// Close all tooltips and notification windows
XCreateWindowEvent create_event = ev->xcreatewindow;
XWindowAttributes childAttr;
Window childTransient;
// XGetWindowAttributes may generate BadWindow errors, so make sure they are silently ignored
int (*oldHandler)(Display *, XErrorEvent *);
oldHandler = XSetErrorHandler(trapXErrors);
if (XGetWindowAttributes(create_event.display, create_event.window, &childAttr) && XGetTransientForHint(create_event.display, create_event.window, &childTransient)) {
if ((childAttr.override_redirect) && (childTransient)) {
if (!trinity_desktop_lock_hidden_window_list.contains(create_event.window)) {
trinity_desktop_lock_hidden_window_list.append(create_event.window);
}
XLowerWindow(create_event.display, create_event.window);
XFlush(create_event.display);
}
}
XSetErrorHandler(oldHandler);
}
else if (ev->type == DestroyNotify) {
XDestroyWindowEvent destroy_event = ev->xdestroywindow;
if (trinity_desktop_lock_hidden_window_list.contains(destroy_event.window)) {
trinity_desktop_lock_hidden_window_list.remove(destroy_event.window);
}
}
#if 0
else if (ev->type == CreateNotify) {
// HACK
// Close all tooltips and notification windows
XCreateWindowEvent create_event = ev->xcreatewindow;
XWindowAttributes childAttr;
Window childTransient;
if (XGetWindowAttributes(create_event.display, create_event.window, &childAttr) && XGetTransientForHint(create_event.display, create_event.window, &childTransient)) {
if ((childAttr.override_redirect) && (childTransient)) {
XDestroyWindow(create_event.display, create_event.window);
}
}
}
#endif
return TDEApplication::x11EventFilter( ev );
}
static TDECmdLineOptions options[] =
{
{ "forcelock", I18N_NOOP("Force session locking"), 0 },
{ "dontlock", I18N_NOOP("Only start screensaver"), 0 },
{ "securedialog", I18N_NOOP("Launch the secure dialog"), 0 },
{ "blank", I18N_NOOP("Only use the blank screensaver"), 0 },
{ "internal <pid>", I18N_NOOP("TDE internal command for background process loading"), 0 },
TDECmdLineLastOption
};
void restore_hidden_override_redirect_windows() {
TQXLibWindowList::iterator it;
for (it = trinity_desktop_lock_hidden_window_list.begin(); it != trinity_desktop_lock_hidden_window_list.end(); ++it) {
Window win = *it;
XRaiseWindow(tqt_xdisplay(), win);
}
}
// -----------------------------------------------------------------------------
int main( int argc, char **argv )
{
TDELocale::setMainCatalogue("kdesktop");
TDECmdLineArgs::init( argc, argv, "kdesktop_lock", I18N_NOOP("KDesktop Locker"), I18N_NOOP("Session Locker for KDesktop"), "2.1" );
TDECmdLineArgs::addCmdLineOptions( options );
TDECmdLineArgs *args = TDECmdLineArgs::parsedArgs();
putenv(strdup("SESSION_MANAGER="));
TDEApplication::disableAutoDcopRegistration(); // not needed
XSetErrorHandler(trapXErrors);
MyApp* app = NULL;
while (1 == 1) {
signalled_forcelock = FALSE;
signalled_dontlock = FALSE;
signalled_securedialog = FALSE;
signalled_blank = FALSE;
signalled_run = FALSE;
int kdesktop_screen_number = 0;
int starting_screen = 0;
bool child = false;
int parent_connection = 0; // socket to the parent saver
TQValueList<int> child_sockets;
if (TDEGlobalSettings::isMultiHead())
{
Display *dpy = XOpenDisplay(NULL);
if (! dpy) {
fprintf(stderr,
"%s: FATAL ERROR: couldn't open display '%s'\n",
argv[0], XDisplayName(NULL));
exit(1);
}
int number_of_screens = ScreenCount(dpy);
starting_screen = kdesktop_screen_number = DefaultScreen(dpy);
int pos;
TQCString display_name = XDisplayString(dpy);
XCloseDisplay(dpy);
kdDebug() << "screen " << number_of_screens << " " << kdesktop_screen_number << " " << display_name << " " << starting_screen << endl;
dpy = 0;
if ((pos = display_name.findRev('.')) != -1)
display_name.remove(pos, 10);
TQCString env;
if (number_of_screens != 1) {
for (int i = 0; i < number_of_screens; i++) {
if (i != starting_screen) {
int fd[2];
if (pipe(fd)) {
perror("pipe");
break;
}
if (fork() == 0) {
child = true;
kdesktop_screen_number = i;
parent_connection = fd[0];
// break here because we are the child process, we don't
// want to fork() anymore
break;
} else {
child_sockets.append(fd[1]);
}
}
}
env.sprintf("DISPLAY=%s.%d", display_name.data(),
kdesktop_screen_number);
kdDebug() << "env " << env << endl;
if (putenv(strdup(env.data()))) {
fprintf(stderr,
"%s: WARNING: unable to set DISPLAY environment variable\n",
argv[0]);
perror("putenv()");
}
}
}
if (!app) {
#ifdef COMPOSITE
app = new MyApp(TDEApplication::openX11RGBADisplay());
argb_visual = app->isX11CompositionAvailable();
#else
app = new MyApp;
#endif
}
TDELockFile lock(locateLocal("tmp", "kdesktop_lock_lockfile"));
lock.setStaleTime(0);
TDELockFile::LockResult lockRet = lock.lock();
if (lockRet != TDELockFile::LockOK) {
// Terminate existing (stale) process if needed
int pid;
TQString hostName;
TQString appName;
if (lock.getLockInfo(pid, hostName, appName)) {
// Verify that the pid in question is an instance of kdesktop_lock
int len;
char procpath[PATH_MAX];
char fullpath[PATH_MAX];
snprintf(procpath, sizeof(procpath), "/proc/%d/exe", pid);
len = readlink( procpath, fullpath, sizeof(fullpath) );
if (len >= 0) {
fullpath[len] = 0;
TQFileInfo fileInfo(fullpath);
if (fileInfo.baseName() == "kdesktop_lock") {
// Verify that pid in question is owned by current user before killing it
uid_t current_uid = geteuid();
struct stat info;
if (lstat(procpath, &info) == 0) {
if (info.st_uid == current_uid) {
kill(pid, SIGKILL);
}
}
}
}
}
}
// Force a relock as a stale lockfile or process may have been dealt with above
if (!lock.isLocked()) {
lockRet = lock.lock(TDELockFile::LockNoBlock | TDELockFile::LockForce);
}
kdDebug() << "app " << kdesktop_screen_number << " " << starting_screen << " " << child << " " << child_sockets.count() << " " << parent_connection << endl;
app->disableSessionManagement();
TDEGlobal::locale()->insertCatalogue("libdmctl");
struct stat st;
KSimpleConfig* tdmconfig;
OPEN_TDMCONFIG_AND_SET_GROUP
trinity_desktop_lock_process = new LockProcess;
// Start loading core functions, such as the desktop wallpaper interface
app->processEvents();
if (args->isSet( "internal" )) {
kdesktop_pid = atoi(args->getOption( "internal" ));
sigset_t new_mask;
sigset_t orig_mask;
struct sigaction act;
in_internal_mode = TRUE;
// handle SIGUSR1
act.sa_handler= sigusr1_handler;
sigemptyset(&(act.sa_mask));
sigaddset(&(act.sa_mask), SIGUSR1);
act.sa_flags = 0;
sigaction(SIGUSR1, &act, 0L);
// handle SIGUSR2
act.sa_handler= sigusr2_handler;
sigemptyset(&(act.sa_mask));
sigaddset(&(act.sa_mask), SIGUSR2);
act.sa_flags = 0;
sigaction(SIGUSR2, &act, 0L);
// handle SIGWINCH (an ersatz SIGUSR3)
act.sa_handler= sigusr3_handler;
sigemptyset(&(act.sa_mask));
sigaddset(&(act.sa_mask), SIGWINCH);
act.sa_flags = 0;
sigaction(SIGWINCH, &act, 0L);
// handle SIGTTIN (an ersatz SIGUSR4)
act.sa_handler= sigusr4_handler;
sigemptyset(&(act.sa_mask));
sigaddset(&(act.sa_mask), SIGTTIN);
act.sa_flags = 0;
sigaction(SIGTTIN, &act, 0L);
// handle SIGTTOU (an ersatz SIGUSR5)
act.sa_handler= sigusr5_handler;
sigemptyset(&(act.sa_mask));
sigaddset(&(act.sa_mask), SIGTTOU);
act.sa_flags = 0;
sigaction(SIGTTOU, &act, 0L);
// initialize the signal masks
sigemptyset(&new_mask);
sigaddset(&new_mask,SIGUSR1);
sigaddset(&new_mask,SIGUSR2);
sigaddset(&new_mask,SIGWINCH);
sigaddset(&new_mask,SIGTTIN);
sigaddset(&new_mask,SIGTTOU);
while (signalled_run == FALSE) {
// let kdesktop know the saver process is ready
if (kill(kdesktop_pid, SIGTTIN) < 0) {
// The controlling kdesktop process probably died. Commit suicide...
return 12;
}
// Get root window attributes
XWindowAttributes rootAttr;
XGetWindowAttributes(tqt_xdisplay(), RootWindow(tqt_xdisplay(), tqt_xscreen()), &rootAttr);
// Disable reception of all X11 events on the root window
XSelectInput( tqt_xdisplay(), tqt_xrootwin(), 0 );
app->processEvents();
// wait for SIGUSR1, SIGUSR2, SIGWINCH, SIGTTIN, or SIGTTOU
sigprocmask(SIG_BLOCK, &new_mask, &orig_mask);
if (signalled_run != TRUE) {
sigsuspend(&orig_mask);
}
sigprocmask(SIG_UNBLOCK, &new_mask, NULL);
// Reenable reception of X11 events on the root window
XSelectInput( tqt_xdisplay(), tqt_xrootwin(), rootAttr.your_event_mask );
}
// Block reception of all signals in this thread
sigprocmask(SIG_BLOCK, &new_mask, NULL);
}
// (re)load settings here so that they actually reflect reality
// we need to read from the right rc file - possibly taking screen number in account
if (!trinity_desktop_lock_settings_initialized) {
KDesktopSettings::instance("kdesktoprc");
trinity_desktop_lock_settings_initialized = true;
}
else {
KDesktopSettings::self()->readConfig();
}
trinity_desktop_lock_use_system_modal_dialogs = !KDesktopSettings::useUnmanagedLockWindows();
trinity_desktop_lock_delay_screensaver_start = KDesktopSettings::delaySaverStart();
if (trinity_desktop_lock_use_system_modal_dialogs) {
#ifdef BUILD_TSAK
trinity_desktop_lock_use_sak = tdmconfig->readBoolEntry("UseSAK", false) && KDesktopSettings::useTDESAK();
#else
trinity_desktop_lock_use_sak = false;
#endif
}
else {
trinity_desktop_lock_use_sak = false; // If SAK is enabled with unmanaged windows, the SAK dialog will never close and will "burn in" the screen
trinity_desktop_lock_delay_screensaver_start = false; // If trinity_desktop_lock_delay_screensaver_start is true with unmanaged windows, the lock dialog may never appear
}
trinity_desktop_lock_hide_active_windows = KDesktopSettings::hideActiveWindowsFromSaver();
trinity_desktop_lock_hide_cancel_button = KDesktopSettings::hideCancelButton();
delete tdmconfig;
if (args->isSet( "forcelock" ) || (signalled_forcelock == TRUE)) {
trinity_desktop_lock_forced = TRUE;
}
trinity_desktop_lock_process->init(child, (args->isSet( "blank" ) || (signalled_blank == TRUE)));
if (!child) {
trinity_desktop_lock_process->setChildren(child_sockets);
}
else {
trinity_desktop_lock_process->setParent(parent_connection);
}
bool rt;
if( (((!child) && (args->isSet( "forcelock" ))) || (signalled_forcelock == TRUE))) {
rt = trinity_desktop_lock_process->lock();
}
else if( child || (args->isSet( "dontlock" ) || (signalled_dontlock == TRUE))) {
rt = trinity_desktop_lock_process->dontLock();
}
else if( child || (args->isSet( "securedialog" ) || (signalled_securedialog == TRUE))) {
int retcode = tde_sak_verify_calling_process();
if (retcode == 0) {
rt = trinity_desktop_lock_process->runSecureDialog();
}
else {
return 1;
}
}
else {
rt = trinity_desktop_lock_process->defaultSave();
}
if (!rt) {
return 0;
}
if (in_internal_mode == FALSE) {
trinity_desktop_lock_hidden_window_list.clear();
int ret = app->exec();
restore_hidden_override_redirect_windows();
return ret;
}
else {
if (kill(kdesktop_pid, 0) < 0) {
// The controlling kdesktop process probably died. Commit suicide...
return 12;
}
trinity_desktop_lock_hidden_window_list.clear();
app->exec();
restore_hidden_override_redirect_windows();
if (kill(kdesktop_pid, SIGUSR1) < 0) {
// The controlling kdesktop process probably died. Commit suicide...
return 12;
}
delete trinity_desktop_lock_process;
trinity_desktop_lock_process = NULL;
// FIXME
// We should not have to return (restart) at all,
// but it seems that some X11 connections are left active,
// preventing the lock process from restarting properly in the while() loop above.
return 0;
}
}
}
#include "main.moc"
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