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KDECore

kkernel_mac.cpp

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00001 /*
00002    This file is part of the KDE libraries
00003    Copyright (C) 2008 Benjamin Reed <rangerrick@befunk.com>
00004 
00005    This library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Library General Public
00007    License version 2 as published by the Free Software Foundation.
00008 
00009    This library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Library General Public License for more details.
00013 
00014    You should have received a copy of the GNU Library General Public License
00015    along with this library; see the file COPYING.LIB.  If not, write to
00016    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017    Boston, MA 02110-1301, USA.
00018 */
00019 
00020 #include <config.h>
00021 #include <QtCore/qglobal.h>
00022 
00023 #include "kkernel_mac.h"
00024 
00025 #ifdef Q_OS_MACX
00026 
00027 #include <unistd.h>
00028 #include <string.h>
00029 #include <stdio.h>
00030 #include <stdlib.h>
00031 #include <sys/param.h>
00032 #include <crt_externs.h>
00033 #include <mach-o/dyld.h>
00034 
00035 #include <CoreFoundation/CFBundle.h>
00036 #include <CoreFoundation/CFString.h>
00037 #include <CoreFoundation/CFURL.h>
00038 #include <QtCore/QFile>
00039 #include <QtCore/QProcess>
00040 #include <QtCore/QStringList>
00041 #include <QtCore/qvarlengtharray.h>
00042 #include <kstandarddirs.h>
00043 #include <ksharedconfig.h>
00044 #include <kconfig.h>
00045 #include <kdebug.h>
00046 
00047 int timeout = 3000; // msec
00048 
00049 bool dbus_initialized = false;
00050 
00055 static QString convert_CFString_to_QString(CFStringRef str) {
00056     CFIndex length = CFStringGetLength(str);
00057     const UniChar *chars = CFStringGetCharactersPtr(str);
00058     if (chars)
00059         return QString(reinterpret_cast<const QChar *>(chars), length);
00060 
00061     QVarLengthArray<UniChar> buffer(length);
00062     CFStringGetCharacters(str, CFRangeMake(0, length), buffer.data());
00063     return QString(reinterpret_cast<const QChar *>(buffer.constData()), length);
00064 }
00065 
00075 void
00076 mac_fork_and_reexec_self()
00077 {
00078     int argc = *_NSGetArgc();
00079     char ** argv = *_NSGetArgv();
00080     char * newargv[argc+2];
00081     char progname[PATH_MAX];
00082     uint32_t buflen = PATH_MAX;
00083     _NSGetExecutablePath(progname, &buflen);
00084     bool found_psn = false;
00085 
00086     for (int i = 0; i < argc; i++) {
00087         newargv[i] = argv[i];
00088     }
00089 
00090     newargv[argc] = "--nofork";
00091     newargv[argc+1] = NULL;
00092 
00093     int x_fork_result = fork();
00094     switch(x_fork_result) {
00095 
00096         case -1:
00097 #ifndef NDEBUG
00098             fprintf(stderr, "Mac OS X workaround fork() failed!\n");
00099 #endif
00100             ::_exit(255);
00101             break;
00102 
00103         case 0:
00104             // Child
00105             execvp(progname, newargv);
00106             break;
00107 
00108         default:
00109             // Parent
00110             _exit(0);
00111             break;
00112 
00113     }
00114 }
00115 
00120 bool mac_set_dbus_address(QString value)
00121 {
00122     if (!value.isEmpty() && QFile::exists(value) && (QFile::permissions(value) & QFile::WriteUser)) {
00123         value = "unix:path=" + value;
00124         ::setenv("DBUS_SESSION_BUS_ADDRESS", value.toLocal8Bit(), 1);
00125         kDebug() << "set session bus address to" << value;
00126         return true;
00127     }
00128     return false;
00129 }
00130 
00135 void mac_initialize_dbus()
00136 {
00137     if (dbus_initialized)
00138         return;
00139 
00140     QString dbusVar = qgetenv("DBUS_SESSION_BUS_ADDRESS");
00141     if (!dbusVar.isEmpty()) {
00142         dbus_initialized = true;
00143         return;
00144     }
00145 
00146     dbusVar = QFile::decodeName(qgetenv("DBUS_LAUNCHD_SESSION_BUS_SOCKET"));
00147     if (mac_set_dbus_address(dbusVar)) {
00148         dbus_initialized = true;
00149         return;
00150     }
00151 
00152     QString externalProc;
00153     QStringList path = QFile::decodeName(qgetenv("KDEDIRS")).split(':').replaceInStrings(QRegExp("$"), "/bin");
00154     path << QFile::decodeName(qgetenv("PATH")).split(':') << "/usr/local/bin";
00155 
00156     for (int i = 0; i < path.size(); ++i) {
00157         QString testLaunchctl = QString(path.at(i)).append("/launchctl");
00158         if (QFile(testLaunchctl).exists()) {
00159             externalProc = testLaunchctl;
00160             break;
00161         }
00162     }
00163 
00164     QString line;
00165     QProcess qp;
00166     qp.setTextModeEnabled(true);
00167 
00168     if (!externalProc.isEmpty()) {
00169         qp.start(externalProc, QStringList() << "getenv" << "DBUS_LAUNCHD_SESSION_BUS_SOCKET");
00170         if (!qp.waitForStarted(timeout)) {
00171             kDebug() << externalProc << "never started";
00172         } else {
00173             if (!qp.waitForReadyRead(timeout)) {
00174                 kDebug() << externalProc << "never wrote anything";
00175             } else {
00176                 while (qp.atEnd() == false) {
00177                     line = qp.readLine().trimmed();
00178                     if (mac_set_dbus_address(line)) {
00179                         dbus_initialized = true;
00180                     }
00181                 }
00182             }
00183             qp.waitForFinished(timeout);
00184         }
00185     }
00186 
00187     if (dbus_initialized == false) {
00188         kDebug() << "warning: unable to initialize D-Bus environment!";
00189     }
00190 
00191 }
00192 
00193 QString mac_app_filename() {
00194     static QString appFileName;
00195     if (appFileName.isEmpty()) {
00196         CFURLRef bundleURL = NULL;
00197         CFBundleRef bundle = NULL;
00198         CFStringRef bundlePath = NULL;
00199 
00200         bundle = CFBundleGetMainBundle();
00201         if (bundle) {
00202             bundleURL = CFBundleCopyBundleURL(bundle);
00203             bundlePath = CFURLCopyFileSystemPath(bundleURL, kCFURLPOSIXPathStyle);
00204 
00205             if (bundleURL) {
00206                 CFRelease(bundleURL);
00207             }
00208 
00209             if (bundlePath) {
00210                 appFileName = convert_CFString_to_QString(bundlePath);
00211                 CFRelease(bundlePath);
00212             }
00213         }
00214     }
00215     return appFileName;
00216 }
00217 
00218 #endif

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