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diff --git a/kmail/kmstartup.cpp b/kmail/kmstartup.cpp
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+/*
+ This file is part of KMail, the KDE mail client.
+ Copyright (c) 2000 Don Sanders <sanders@kde.org>
+
+ KMail is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License, version 2, as
+ published by the Free Software Foundation.
+
+ KMail 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 program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include <config.h>
+
+#include "kmstartup.h"
+
+#include "kmkernel.h" //control center
+#include "kcursorsaver.h"
+
+#include <klocale.h>
+#include <ksimpleconfig.h>
+#include <kstandarddirs.h>
+#include <kmessagebox.h>
+#include <dcopclient.h>
+#include <kcrash.h>
+#include <kglobal.h>
+#include <kapplication.h>
+#include <kaboutdata.h>
+#include <kiconloader.h>
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <qfile.h>
+
+#undef Status // stupid X headers
+
+extern "C" {
+
+// Crash recovery signal handler
+void kmsignalHandler(int sigId)
+{
+ kmsetSignalHandler(SIG_DFL);
+ fprintf(stderr, "*** KMail got signal %d (Exiting)\n", sigId);
+ // try to cleanup all windows
+ if (kmkernel) kmkernel->dumpDeadLetters();
+ ::exit(-1); //
+}
+
+// Crash recovery signal handler
+void kmcrashHandler(int sigId)
+{
+ kmsetSignalHandler(SIG_DFL);
+ fprintf(stderr, "*** KMail got signal %d (Crashing)\n", sigId);
+ // try to cleanup all windows
+ if (kmkernel) kmkernel->dumpDeadLetters();
+ // Return to DrKonqi.
+}
+//-----------------------------------------------------------------------------
+
+
+void kmsetSignalHandler(void (*handler)(int))
+{
+ signal(SIGKILL, handler);
+ signal(SIGTERM, handler);
+ signal(SIGHUP, handler);
+ KCrash::setEmergencySaveFunction(kmcrashHandler);
+}
+
+}
+//-----------------------------------------------------------------------------
+
+namespace {
+ QString getMyHostName() {
+ char hostNameC[256];
+ // null terminate this C string
+ hostNameC[255] = 0;
+ // set the string to 0 length if gethostname fails
+ if(gethostname(hostNameC, 255))
+ hostNameC[0] = 0;
+ return QString::fromLocal8Bit(hostNameC);
+ }
+} // anon namespace
+
+namespace KMail {
+
+void checkConfigUpdates() {
+ static const char * const updates[] = {
+ "9",
+ "3.1-update-identities",
+ "3.1-use-identity-uoids",
+ "3.1-new-mail-notification",
+ "3.2-update-loop-on-goto-unread-settings",
+ "3.1.4-dont-use-UOID-0-for-any-identity",
+ "3.2-misc",
+ "3.2-moves",
+ "3.3-use-ID-for-accounts",
+ "3.3-update-filter-rules",
+ "3.3-move-identities-to-own-file",
+ "3.3-aegypten-kpgprc-to-kmailrc",
+ "3.3-aegypten-kpgprc-to-libkleopatrarc",
+ "3.3-aegypten-emailidentities-split-sign-encr-keys",
+ "3.3-misc",
+ "3.3b1-misc",
+ "3.4-misc",
+ "3.4a",
+ "3.4b",
+ "3.4.1",
+ "3.5.4",
+ "3.5.7-imap-flag-migration"
+ };
+ static const int numUpdates = sizeof updates / sizeof *updates;
+ // Warning: do not remove entries in the above array, or the update-level check below will break
+
+ KConfig * config = KMKernel::config();
+ KConfigGroup startup( config, "Startup" );
+ const int configUpdateLevel = startup.readNumEntry( "update-level", 0 );
+ if ( configUpdateLevel == numUpdates ) // Optimize for the common case that everything is OK
+ return;
+
+ for ( int i = configUpdateLevel ; i < numUpdates ; ++i ) {
+ config->checkUpdate( updates[i], "kmail.upd" );
+ }
+ startup.writeEntry( "update-level", numUpdates );
+}
+
+void lockOrDie() {
+// Check and create a lock file to prevent concurrent access to kmail files
+ QString appName = kapp->instanceName();
+ if ( appName.isEmpty() )
+ appName = "kmail";
+
+ QString programName;
+ const KAboutData *about = kapp->aboutData();
+ if ( about )
+ programName = about->programName();
+ if ( programName.isEmpty() )
+ programName = i18n("KMail");
+
+ QString lockLocation = locateLocal("data", "kmail/lock");
+ KSimpleConfig config(lockLocation);
+ int oldPid = config.readNumEntry("pid", -1);
+ const QString oldHostName = config.readEntry("hostname");
+ const QString oldAppName = config.readEntry( "appName", appName );
+ const QString oldProgramName = config.readEntry( "programName", programName );
+ const QString hostName = getMyHostName();
+ bool first_instance = false;
+ if ( oldPid == -1 )
+ first_instance = true;
+ else if (hostName == oldHostName && oldPid != getpid()) {
+ // check if the lock file is stale
+#ifdef Q_OS_LINUX
+ if ( ::access("/proc", X_OK ) == 0 ) {
+ // On linux with /proc we can even check that it's really kmail and not something else
+ char path_buffer[MAXPATHLEN + 1];
+ path_buffer[MAXPATHLEN] = 0;
+ const QString procPath = QString("/proc/%1/exe").arg(oldPid);
+ const int length = readlink (procPath.latin1(), path_buffer, MAXPATHLEN);
+ if ( length == -1 ) // not such pid
+ first_instance = true;
+ else {
+ path_buffer[length] = '\0';
+ const QString path = QFile::decodeName(path_buffer);
+ kdDebug() << k_funcinfo << path << endl;
+ const int pos = path.findRev('/');
+ const QString fileName = path.mid(pos+1);
+ kdDebug() << "Found process " << oldPid << " running. It's: " << fileName << endl;
+ first_instance = fileName != "kmail" && fileName != "kontact";
+ }
+ } else
+#endif
+ {
+ // Otherwise we just check if the other pid is currently running.
+ // Not 100% correct but better safe than sorry.
+ if ( kill(oldPid, 0) == -1 )
+ first_instance = ( errno == ESRCH );
+ }
+ }
+
+ if ( !first_instance ) {
+ QString msg;
+ if ( oldHostName == hostName ) {
+ // this can only happen if the user is running this application on
+ // different displays on the same machine. All other cases will be
+ // taken care of by KUniqueApplication()
+ if ( oldAppName == appName )
+ msg = i18n("%1 already seems to be running on another display on "
+ "this machine. Running %2 more than once "
+ "can cause the loss of mail. You should not start %1 "
+ "unless you are sure that it is not already running.")
+ .arg( programName, programName );
+ // QString::arg( st ) only replaces the first occurrence of %1
+ // with st while QString::arg( s1, s2 ) replacess all occurrences
+ // of %1 with s1 and all occurrences of %2 with s2. So don't
+ // even think about changing the above to .arg( programName ).
+ else
+ msg = i18n("%1 seems to be running on another display on this "
+ "machine. Running %1 and %2 at the same "
+ "time can cause the loss of mail. You should not start %2 "
+ "unless you are sure that %1 is not running.")
+ .arg( oldProgramName, programName );
+ }
+ else {
+ if ( oldAppName == appName )
+ msg = i18n("%1 already seems to be running on %2. Running %1 more "
+ "than once can cause the loss of mail. You should not "
+ "start %1 on this computer unless you are sure that it is "
+ "not already running on %2.")
+ .arg( programName, oldHostName );
+ else
+ msg = i18n("%1 seems to be running on %3. Running %1 and %2 at the "
+ "same time can cause the loss of mail. You should not "
+ "start %2 on this computer unless you are sure that %1 is "
+ "not running on %3.")
+ .arg( oldProgramName, programName, oldHostName );
+ }
+
+ KCursorSaver idle( KBusyPtr::idle() );
+ if ( KMessageBox::No ==
+ KMessageBox::warningYesNo( 0, msg, QString::null,
+ i18n("Start %1").arg( programName ),
+ i18n("Exit") ) ) {
+ exit(1);
+ }
+ }
+
+ config.writeEntry("pid", getpid());
+ config.writeEntry("hostname", hostName);
+ config.writeEntry( "appName", appName );
+ config.writeEntry( "programName", programName );
+ config.sync();
+}
+
+void insertLibraryCataloguesAndIcons() {
+ static const char * const catalogues[] = {
+ "libkdepim",
+ "libksieve",
+ "libkleopatra",
+ "libkmime"
+ };
+
+ KLocale * l = KGlobal::locale();
+ KIconLoader * il = KGlobal::iconLoader();
+ for ( unsigned int i = 0 ; i < sizeof catalogues / sizeof *catalogues ; ++i ) {
+ l->insertCatalogue( catalogues[i] );
+ il->addAppDir( catalogues[i] );
+ }
+
+}
+
+void cleanup()
+{
+ const QString lockLocation = locateLocal("data", "kmail/lock");
+ KSimpleConfig config(lockLocation);
+ config.writeEntry("pid", -1);
+ config.sync();
+}
+}
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