mirror of
https://bitbucket.org/smil3y/kde-workspace.git
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264cb151f9
if it crashes a startup error will be shown via `xmessage`, there will be not window manager (most likely) at that point and many things will not work as expected. ksmserver cannot be restarted for example, drkonqi is not option either because attempting to report a bug will open a browser but the backtrace cannot be copied (the browser window will be on top of any other window if it launches with no way to switch to the drkonqi window), etc. in other words - the best thing that can be done is log the backtrace to the system log (the ksmserver debug area has to be configured for that) Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
264 lines
8.8 KiB
C++
264 lines
8.8 KiB
C++
/*****************************************************************
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ksmserver - the KDE session management server
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Copyright 2000 Matthias Ettrich <ettrich@kde.org>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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******************************************************************/
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#include "config-ksmserver.h"
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#include "server.h"
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#include <fixx11h.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <KMessageBox>
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#include <QtDBus/QtDBus>
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#include <kapplication.h>
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#include <kcmdlineargs.h>
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#include <kconfiggroup.h>
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#include <kaboutdata.h>
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#include <kdebug.h>
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#include <klocale.h>
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#include <kglobal.h>
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#include <kconfig.h>
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#include <kselectionowner.h>
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#include <kwindowsystem.h>
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#include <kcrash.h>
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#include <QtGui/qx11info_x11.h>
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#include <QtCore/qfile.h>
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#include <X11/Xlib.h>
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static const char version[] = "0.4";
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static const char description[] = I18N_NOOP( "The reliable KDE session manager that talks the standard X11R6 \nsession management protocol (XSMP)." );
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extern KSMServer* the_server;
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void IoErrorHandler ( IceConn iceConn)
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{
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the_server->ioError( iceConn );
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}
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bool writeTest(QByteArray path)
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{
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path += "/XXXXXX";
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int fd = mkstemp(path.data());
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if (fd == -1)
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return false;
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if (write(fd, "Hello World\n", 12) == -1)
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{
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int save_errno = errno;
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close(fd);
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unlink(path.data());
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errno = save_errno;
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return false;
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}
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close(fd);
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unlink(path.data());
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return true;
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}
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void sanity_check( int argc, char* argv[], KAboutData* aboutDataPtr )
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{
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QString msg;
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QByteArray path = getenv("HOME");
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QByteArray readOnly = getenv("KDE_HOME_READONLY");
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if (path.isEmpty())
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{
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msg = QLatin1String("$HOME not set!");
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}
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if (msg.isEmpty() && access(path.data(), W_OK))
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{
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if (errno == ENOENT)
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msg = QLatin1String("$HOME directory (%1) does not exist.");
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else if (readOnly.isEmpty())
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msg = QLatin1String("No write access to $HOME directory (%1).");
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}
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if (msg.isEmpty() && access(path.data(), R_OK))
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{
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if (errno == ENOENT)
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msg = "$HOME directory (%1) does not exist.";
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else
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msg = "No read access to $HOME directory (%1).";
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}
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if (msg.isEmpty() && readOnly.isEmpty() && !writeTest(path))
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{
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if (errno == ENOSPC)
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msg = "$HOME directory (%1) is out of disk space.";
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else
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msg = QByteArray("Writing to the $HOME directory (%1) failed with\n "
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"the error '")+QByteArray(strerror(errno))+QByteArray("'");
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}
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if (msg.isEmpty())
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{
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path = getenv("ICEAUTHORITY");
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if (path.isEmpty())
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{
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path = getenv("HOME");
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path += "/.ICEauthority";
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}
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if (access(path.data(), W_OK) && (errno != ENOENT))
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msg = "No write access to '%1'.";
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else if (access(path.data(), R_OK) && (errno != ENOENT))
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msg = "No read access to '%1'.";
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}
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if (msg.isEmpty())
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{
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path = getenv("TMPDIR");
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if (path.isEmpty())
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path = "/tmp";
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if (!writeTest(path))
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{
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if (errno == ENOSPC)
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msg = "Temp directory (%1) is out of disk space.";
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else
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msg = "Writing to the temp directory (%1) failed with\n "
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"the error '"+QByteArray(strerror(errno))+QByteArray("'");
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}
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}
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if (msg.isEmpty() && (path != "/tmp"))
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{
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path = "/tmp";
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if (!writeTest(path))
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{
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if (errno == ENOSPC)
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msg = "Temp directory (%1) is out of disk space.";
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else
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msg = "Writing to the temp directory (%1) failed with\n "
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"the error '"+QByteArray(strerror(errno))+QByteArray("'");
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}
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}
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if (msg.isEmpty())
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{
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path += "/.ICE-unix";
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if (access(path.data(), W_OK) && (errno != ENOENT))
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msg = "No write access to '%1'.";
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else if (access(path.data(), R_OK) && (errno != ENOENT))
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msg = "No read access to '%1'.";
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}
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if (!msg.isEmpty())
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{
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const char *msg_pre =
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"The following installation problem was detected\n"
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"while trying to start KDE:"
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"\n\n ";
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const char *msg_post = "\n\nKDE is unable to start.\n";
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fputs(msg_pre, stderr);
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fprintf(stderr, "%s", qPrintable(msg.arg(QFile::decodeName(path))));
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fputs(msg_post, stderr);
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QApplication a(argc, argv);
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KComponentData i(aboutDataPtr);
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QString qmsg = msg_pre+msg.arg(QFile::decodeName(path))+msg_post;
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KMessageBox::error(0, qmsg, "KDE Installation Problem!");
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exit(255);
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}
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}
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int main( int argc, char* argv[] )
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{
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KAboutData aboutData( "ksmserver", 0, ki18n("The KDE Session Manager"),
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version, ki18n(description), KAboutData::License_BSD,
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ki18n("(C) 2000, The KDE Developers"));
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aboutData.addAuthor(ki18n("Matthias Ettrich"),KLocalizedString(), "ettrich@kde.org");
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aboutData.addAuthor(ki18n("Luboš Luňák"), ki18n( "Maintainer" ), "l.lunak@kde.org" );
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sanity_check(argc, argv, &aboutData);
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KCmdLineArgs::init(argc, argv, &aboutData);
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KCmdLineOptions options;
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options.add("r");
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options.add("restore", ki18n("Restores the saved user session if available"));
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options.add("w");
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options.add("windowmanager <wm>", ki18n("Starts 'wm' in case no other window manager is \nparticipating in the session. Default is 'kwin'"));
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options.add("nolocal", ki18n("Also allow remote connections"));
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options.add("lockscreen", ki18n("Starts the session in locked mode"));
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KCmdLineArgs::addCmdLineOptions( options );
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::unsetenv("SESSION_MANAGER");
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KApplication *a = new KApplication();
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fcntl(ConnectionNumber(QX11Info::display()), F_SETFD, 1);
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a->setQuitOnLastWindowClosed(false); // #169486
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KCmdLineArgs *args = KCmdLineArgs::parsedArgs();
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if( !QDBusConnection::sessionBus().interface()->registerService( "org.kde.ksmserver", QDBusConnectionInterface::DontQueueService ) )
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{
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qWarning("Could not register with D-BUS. Aborting.");
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return 1;
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}
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QString wm = args->getOption("windowmanager");
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bool only_local = args->isSet("local");
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#ifndef HAVE__ICETRANSNOLISTEN
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/* this seems strange, but the default is only_local, so if !only_local
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* the option --nolocal was given, and we warn (the option --nolocal
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* does nothing on this platform, as here the default is reversed)
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*/
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if (!only_local) {
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qWarning("--[no]local is not supported on your platform. Sorry.");
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}
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only_local = false;
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#endif
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KSMServer *server = new KSMServer( wm, only_local, args->isSet("lockscreen") );
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KApplication::quitOnSignal();
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KCrash::setFlags(KCrash::Backtrace);
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// for the KDE-already-running check in startkde
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KSelectionOwner kde_running( "_KDE_RUNNING", 0 );
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kde_running.claim( false );
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IceSetIOErrorHandler( IoErrorHandler );
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KConfigGroup config(KGlobal::config(), "General");
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int realScreenCount = ScreenCount( QX11Info::display() );
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bool screenCountChanged =
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( config.readEntry( "screenCount", realScreenCount ) != realScreenCount );
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QString loginMode = config.readEntry( "loginMode", "restorePreviousLogout" );
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if ( args->isSet("restore") && ! screenCountChanged )
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server->restoreSession( SESSION_BY_USER );
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else if ( loginMode == "default" || screenCountChanged )
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server->startDefaultSession();
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else if ( loginMode == "restorePreviousLogout" )
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server->restoreSession( SESSION_PREVIOUS_LOGOUT );
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else if ( loginMode == "restoreSavedSession" )
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server->restoreSession( SESSION_BY_USER );
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else
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server->startDefaultSession();
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int ret = a->exec();
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kde_running.release(); // needs to be done before QApplication destruction
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delete a;
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return ret;
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}
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