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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 "kkernel_mac.h"
00021 
00022 #include <config.h>
00023 
00024 #ifdef Q_OS_MACX
00025 
00026 #include <unistd.h>
00027 #include <string.h>
00028 #include <stdio.h>
00029 #include <stdlib.h>
00030 #include <sys/param.h>
00031 #include <crt_externs.h>
00032 #include <mach-o/dyld.h>
00033 
00034 #include <CoreFoundation/CFBundle.h>
00035 #include <CoreFoundation/CFString.h>
00036 #include <CoreFoundation/CFURL.h>
00037 #include <QtCore/QFile>
00038 #include <QtCore/QProcess>
00039 #include <QtCore/QStringList>
00040 #include <QtCore/qvarlengtharray.h>
00041 #include <kstandarddirs.h>
00042 #include <ksharedconfig.h>
00043 #include <kconfig.h>
00044 #include <kdebug.h>
00045 
00046 int timeout = 3000; // msec
00047 
00048 bool dbus_initialized = false;
00049 
00054 static QString convert_CFString_to_QString(CFStringRef str) {
00055     CFIndex length = CFStringGetLength(str);
00056     const UniChar *chars = CFStringGetCharactersPtr(str);
00057     if (chars)
00058         return QString(reinterpret_cast<const QChar *>(chars), length);
00059 
00060     QVarLengthArray<UniChar> buffer(length);
00061     CFStringGetCharacters(str, CFRangeMake(0, length), buffer.data());
00062     return QString(reinterpret_cast<const QChar *>(buffer.constData()), length);
00063 }
00064 
00074 void
00075 mac_fork_and_reexec_self()
00076 {
00077     int argc = *_NSGetArgc();
00078     char ** argv = *_NSGetArgv();
00079     char * newargv[argc+2];
00080     char progname[PATH_MAX];
00081     uint32_t buflen = PATH_MAX;
00082     _NSGetExecutablePath(progname, &buflen);
00083     bool found_psn = false;
00084 
00085     for (int i = 0; i < argc; i++) {
00086         newargv[i] = argv[i];
00087     }
00088 
00089     newargv[argc] = "--nofork";
00090     newargv[argc+1] = NULL;
00091 
00092     int x_fork_result = fork();
00093     switch(x_fork_result) {
00094 
00095         case -1:
00096 #ifndef NDEBUG
00097             fprintf(stderr, "Mac OS X workaround fork() failed!\n");
00098 #endif
00099             ::_exit(255);
00100             break;
00101 
00102         case 0:
00103             // Child
00104             execvp(progname, newargv);
00105             break;
00106 
00107         default:
00108             // Parent
00109             _exit(0);
00110             break;
00111 
00112     }
00113 }
00114 
00119 bool mac_set_dbus_address(QString value)
00120 {
00121     if (!value.isEmpty() && QFile::exists(value) && (QFile::permissions(value) & QFile::WriteUser)) {
00122         value = "unix:path=" + value;
00123         ::setenv("DBUS_SESSION_BUS_ADDRESS", value.toLocal8Bit(), 1);
00124         kDebug() << "set session bus address to" << value;
00125         return true;
00126     }
00127     return false;
00128 }
00129 
00134 void mac_initialize_dbus()
00135 {
00136     if (dbus_initialized)
00137         return;
00138 
00139     QString dbusVar = qgetenv("DBUS_SESSION_BUS_ADDRESS");
00140     if (!dbusVar.isEmpty()) {
00141         dbus_initialized = true;
00142         return;
00143     }
00144 
00145     dbusVar = QFile::decodeName(qgetenv("DBUS_LAUNCHD_SESSION_BUS_SOCKET"));
00146     if (mac_set_dbus_address(dbusVar)) {
00147         dbus_initialized = true;
00148         return;
00149     }
00150 
00151     QString externalProc;
00152     QStringList path = QFile::decodeName(qgetenv("KDEDIRS")).split(':').replaceInStrings(QRegExp("$"), "/bin");
00153     path << QFile::decodeName(qgetenv("PATH")).split(':') << "/usr/local/bin";
00154 
00155     for (int i = 0; i < path.size(); ++i) {
00156         QString testLaunchctl = QString(path.at(i)).append("/launchctl");
00157         if (QFile(testLaunchctl).exists()) {
00158             externalProc = testLaunchctl;
00159             break;
00160         }
00161     }
00162 
00163     if (!externalProc.isEmpty()) {
00164                 QProcess qp;
00165                 qp.setTextModeEnabled(true);
00166 
00167         qp.start(externalProc, QStringList() << "getenv" << "DBUS_LAUNCHD_SESSION_BUS_SOCKET");
00168                 if (!qp.waitForFinished(timeout)) {
00169                     kDebug() << "error running" << externalProc << qp.errorString();
00170                     return;
00171                 }
00172                 if (qp.exitCode() != 0) {
00173                     kDebug() << externalProc << "unsuccessful:" << qp.readAllStandardError();
00174                     return;
00175                 }
00176 
00177                 QString line = qp.readLine().trimmed(); // read the first line
00178                 if (mac_set_dbus_address(line))
00179                     dbus_initialized = true; // hooray
00180     }
00181 
00182     if (dbus_initialized == false) {
00183         kDebug() << "warning: unable to initialize D-Bus environment!";
00184     }
00185 
00186 }
00187 
00188 QString mac_app_filename() {
00189     static QString appFileName;
00190     if (appFileName.isEmpty()) {
00191         CFURLRef bundleURL = NULL;
00192         CFBundleRef bundle = NULL;
00193         CFStringRef bundlePath = NULL;
00194 
00195         bundle = CFBundleGetMainBundle();
00196         if (bundle) {
00197             bundleURL = CFBundleCopyBundleURL(bundle);
00198             bundlePath = CFURLCopyFileSystemPath(bundleURL, kCFURLPOSIXPathStyle);
00199 
00200             if (bundleURL) {
00201                 CFRelease(bundleURL);
00202             }
00203 
00204             if (bundlePath) {
00205                 appFileName = convert_CFString_to_QString(bundlePath);
00206                 CFRelease(bundlePath);
00207             }
00208         }
00209     }
00210     return appFileName;
00211 }
00212 
00213 #endif

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