KDED

khostname.cpp

00001 /*  This file is part of the KDE libraries
00002  *  Copyright (C) 2001 Waldo Bastian <bastian@kde.org>
00003  *
00004  *  This library is free software; you can redistribute it and/or
00005  *  modify it under the terms of the GNU Library General Public
00006  *  License version 2 as published by the Free Software Foundation;
00007  *
00008  *  This library is distributed in the hope that it will be useful,
00009  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00010  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011  *  Library General Public License for more details.
00012  *
00013  *  You should have received a copy of the GNU Library General Public License
00014  *  along with this library; see the file COPYING.LIB.  If not, write to
00015  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00016  *  Boston, MA 02110-1301, USA.
00017  **/
00018 
00019 #include <sys/types.h>
00020 #include <sys/stat.h>
00021 #include <unistd.h>
00022 #include <stdlib.h>
00023 #include <stdio.h>
00024 
00025 #include <qfile.h>
00026 #include <qtextstream.h>
00027 #include <qregexp.h>
00028 
00029 #include <dcopclient.h>
00030 
00031 #include <kcmdlineargs.h>
00032 #include <kapplication.h>
00033 #include <klocale.h>
00034 #include <kaboutdata.h>
00035 #include <kglobal.h>
00036 #include <kstandarddirs.h>
00037 #include <kprocess.h>
00038 #include <kde_file.h>
00039 
00040 static KCmdLineOptions options[] = {
00041    { "+old", I18N_NOOP("Old hostname"), 0 },
00042    { "+new", I18N_NOOP("New hostname"), 0 },
00043    KCmdLineLastOption
00044 };
00045 
00046 static const char appName[] = "kdontchangethehostname";
00047 static const char appVersion[] = "1.1";
00048 
00049 class KHostName
00050 {
00051 public:
00052    KHostName();
00053 
00054    void changeX();
00055    void changeDcop();
00056    void changeStdDirs(const QCString &type);
00057    void changeSessionManager();
00058 
00059 protected:
00060    QCString oldName;
00061    QCString newName;
00062    QCString display;
00063    QCString home;
00064 };
00065 
00066 KHostName::KHostName()
00067 {
00068    KCmdLineArgs *args = KCmdLineArgs::parsedArgs();
00069    if (args->count() != 2)
00070       args->usage();
00071    oldName = args->arg(0);
00072    newName = args->arg(1);
00073    if (oldName == newName)
00074       exit(0);  
00075 
00076    home = ::getenv("HOME");
00077    if (home.isEmpty())
00078    {
00079       fprintf(stderr, "%s", i18n("Error: HOME environment variable not set.\n").local8Bit().data());
00080       exit(1);
00081    }
00082 
00083    display = ::getenv("DISPLAY");
00084    // strip the screen number from the display
00085    display.replace(QRegExp("\\.[0-9]+$"), "");
00086    if (display.isEmpty())
00087    {
00088       fprintf(stderr, "%s", i18n("Error: DISPLAY environment variable not set.\n").local8Bit().data());
00089       exit(1);
00090    }
00091 }
00092 
00093 static QCStringList split(const QCString &str)
00094 {
00095    const char *s = str.data();
00096    QCStringList result;
00097    while (*s)
00098    {
00099       const char *i = strchr(s, ' ');
00100       if (!i)
00101       {
00102          result.append(QCString(s));
00103          return result;
00104       }
00105       result.append(QCString(s, i-s+1));
00106       s = i;
00107       while (*s == ' ') s++;
00108    }
00109    return result;
00110 }
00111 
00112 void KHostName::changeX()
00113 {
00114    QString cmd = "xauth list";
00115    FILE *xFile = popen(QFile::encodeName(cmd), "r");
00116    if (!xFile)
00117    {
00118       fprintf(stderr, "Warning: Can't run xauth.\n");
00119       return;   
00120    }
00121    QCStringList lines;
00122    {
00123       char buf[1024+1];
00124       while (!feof(xFile))
00125       {
00126          QCString line = fgets(buf, 1024, xFile);
00127          if (line.length())
00128             line.truncate(line.length()-1); // Strip LF.
00129          if (!line.isEmpty())
00130             lines.append(line);
00131       }
00132    }
00133    pclose(xFile);
00134 
00135    for(QCStringList::ConstIterator it = lines.begin();
00136       it != lines.end(); ++it)
00137    {
00138       QCStringList entries = split(*it);
00139       if (entries.count() != 3)
00140          continue;
00141 
00142       QCString netId = entries[0];
00143       QCString authName = entries[1];
00144       QCString authKey = entries[2];
00145 
00146       int i = netId.findRev(':');
00147       if (i == -1)
00148          continue;
00149       QCString netDisplay = netId.mid(i);
00150       if (netDisplay != display)
00151          continue;
00152 
00153       i = netId.find('/');
00154       if (i == -1)
00155          continue;
00156 
00157       QCString newNetId = newName+netId.mid(i);
00158       QCString oldNetId = netId.left(i);
00159 
00160       if(oldNetId != oldName)
00161          continue;
00162 
00163       cmd = "xauth remove "+KProcess::quote(netId);
00164       system(QFile::encodeName(cmd));
00165       cmd = "xauth add ";
00166       cmd += KProcess::quote(newNetId);
00167       cmd += " ";
00168       cmd += KProcess::quote(authName);
00169       cmd += " ";
00170       cmd += KProcess::quote(authKey);
00171       system(QFile::encodeName(cmd));
00172    }
00173 }
00174 
00175 void KHostName::changeDcop()
00176 {
00177    QCString origFNameOld = DCOPClient::dcopServerFileOld(oldName);
00178    QCString fname = DCOPClient::dcopServerFile(oldName);
00179    QCString origFName = fname;
00180    FILE *dcopFile = fopen(fname.data(), "r");
00181    if (!dcopFile)
00182    {
00183       fprintf(stderr, "Warning: Can't open '%s' for reading.\n", fname.data());
00184       return;
00185    }
00186 
00187    QCString line1, line2;
00188    {
00189      char buf[1024+1];
00190      line1 = fgets(buf, 1024, dcopFile);
00191      if (line1.length())
00192             line1.truncate(line1.length()-1); // Strip LF.
00193 
00194      line2 = fgets(buf, 1024, dcopFile);
00195      if (line2.length())
00196             line2.truncate(line2.length()-1); // Strip LF.
00197    }
00198    fclose(dcopFile);
00199 
00200    QCString oldNetId = line1;
00201 
00202    if (!newName.isEmpty())
00203    {
00204       int i = line1.findRev(':');
00205       if (i == -1)
00206       {
00207          fprintf(stderr, "Warning: File '%s' has unexpected format.\n", fname.data());
00208          return;
00209       }
00210       line1 = "local/"+newName+line1.mid(i);
00211       QCString newNetId = line1;
00212       fname = DCOPClient::dcopServerFile(newName);
00213       unlink(fname.data());
00214       dcopFile = fopen(fname.data(), "w");
00215       if (!dcopFile)
00216       {
00217          fprintf(stderr, "Warning: Can't open '%s' for writing.\n", fname.data());
00218          return;
00219       }
00220 
00221       fputs(line1.data(), dcopFile);
00222       fputc('\n', dcopFile);
00223       fputs(line2.data(), dcopFile);
00224       fputc('\n', dcopFile);
00225 
00226       fclose(dcopFile);
00227 
00228       QCString compatLink = DCOPClient::dcopServerFileOld(newName);
00229       ::symlink(fname.data(), compatLink.data()); // Compatibility link
00230 
00231       // Update .ICEauthority
00232       QString cmd = "iceauth list "+KProcess::quote("netid="+oldNetId);
00233       FILE *iceFile = popen(QFile::encodeName(cmd), "r");
00234       if (!iceFile)
00235       {
00236          fprintf(stderr, "Warning: Can't run iceauth.\n");
00237          return;   
00238       }
00239       QCStringList lines;
00240       {
00241          char buf[1024+1];
00242          while (!feof(iceFile))
00243          {
00244             QCString line = fgets(buf, 1024, iceFile);
00245             if (line.length())
00246                line.truncate(line.length()-1); // Strip LF.
00247             if (!line.isEmpty())
00248                lines.append(line);
00249          }
00250       }
00251       pclose(iceFile);
00252 
00253       for(QCStringList::ConstIterator it = lines.begin();
00254          it != lines.end(); ++it)
00255       {
00256          QCStringList entries = split(*it);
00257          if (entries.count() != 5)
00258             continue;
00259 
00260          QCString protName = entries[0];
00261          QCString netId = entries[2];
00262          QCString authName = entries[3];
00263          QCString authKey = entries[4];
00264          if (netId != oldNetId)
00265             continue;
00266 
00267          cmd = "iceauth add ";
00268          cmd += KProcess::quote(protName);
00269          cmd += " '' ";
00270          cmd += KProcess::quote(newNetId);
00271          cmd += " ";
00272          cmd += KProcess::quote(authName);
00273          cmd += " ";
00274          cmd += KProcess::quote(authKey);
00275          system(QFile::encodeName(cmd));
00276       }
00277    }
00278 
00279    // Remove old entries
00280    {
00281       QString cmd = "iceauth remove "+KProcess::quote("netid="+oldNetId);
00282       system(QFile::encodeName(cmd));
00283       unlink(origFName.data());
00284       origFName = DCOPClient::dcopServerFileOld(oldName); // Compatibility link
00285       unlink(origFName.data());
00286    }
00287 }
00288 
00289 void KHostName::changeStdDirs(const QCString &type)
00290 {
00291    // We make links to the old dirs cause we can't delete the old dirs.
00292    QCString oldDir = QFile::encodeName(QString("%1%2-%3").arg(KGlobal::dirs()->localkdedir()).arg(type).arg(oldName));
00293    QCString newDir = QFile::encodeName(QString("%1%2-%3").arg(KGlobal::dirs()->localkdedir()).arg(type).arg(newName));
00294 
00295    KDE_struct_stat st_buf;
00296 
00297    int result = KDE_lstat(oldDir.data(), &st_buf);
00298    if (result == 0)
00299    {
00300       if (S_ISLNK(st_buf.st_mode))
00301       {
00302          char buf[4096+1];
00303          result = readlink(oldDir.data(), buf, 4096);
00304          if (result >= 0)
00305          {
00306             buf[result] = 0;
00307             result = symlink(buf, newDir.data());
00308          }
00309       }
00310       else if (S_ISDIR(st_buf.st_mode))
00311       {
00312          result = symlink(oldDir.data(), newDir.data());
00313       }
00314       else
00315       {
00316          result = -1;
00317       }
00318    }
00319    if (result != 0)
00320    {
00321       system(("lnusertemp "+type).data());
00322    }
00323 }
00324 
00325 void KHostName::changeSessionManager()
00326 {
00327    QCString sm = ::getenv("SESSION_MANAGER");
00328    if (sm.isEmpty())
00329    {
00330       fprintf(stderr, "Warning: No session management specified.\n");
00331       return;
00332    }
00333    int i = sm.findRev(':');
00334    if ((i == -1) || (sm.left(6) != "local/"))
00335    {
00336       fprintf(stderr, "Warning: Session Management socket '%s' has unexpected format.\n", sm.data());
00337       return;
00338    }
00339    sm = "local/"+newName+sm.mid(i);
00340    QCString name = "SESSION_MANAGER";
00341    QByteArray params;
00342    QDataStream stream(params, IO_WriteOnly);
00343    stream << name << sm;
00344    DCOPClient *client = new DCOPClient();
00345    if (!client->attach())
00346    {
00347       fprintf(stderr, "Warning: DCOP communication problem, can't fix Session Management.\n");
00348       delete client;
00349       return;
00350    }
00351    QCString launcher = KApplication::launcher();
00352    client->send(launcher, launcher, "setLaunchEnv(QCString,QCString)", params);
00353    delete client;
00354 }
00355 
00356 int main(int argc, char **argv)
00357 {
00358    KLocale::setMainCatalogue("kdelibs");
00359    KAboutData d(appName, I18N_NOOP("KDontChangeTheHostName"), appVersion,
00360                 I18N_NOOP("Informs KDE about a change in hostname"),
00361                 KAboutData::License_GPL, "(c) 2001 Waldo Bastian");
00362    d.addAuthor("Waldo Bastian", I18N_NOOP("Author"), "bastian@kde.org");
00363 
00364    KCmdLineArgs::init(argc, argv, &d);
00365    KCmdLineArgs::addCmdLineOptions(options);
00366 
00367    KInstance k(&d);
00368 
00369    KHostName hn;
00370 
00371    if(!getenv("XAUTHLOCALHOSTNAME"))
00372        hn.changeX();
00373 
00374    hn.changeDcop();
00375    hn.changeStdDirs("socket");
00376    hn.changeStdDirs("tmp");
00377    hn.changeSessionManager();
00378 }
00379
KDED

khostname.cpp

KDED

API Reference
