khostname.cpp
/* This file is part of the KDE libraries
* Copyright (C) 2001 Waldo Bastian <bastian@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License version 2 as published by the Free Software Foundation;
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
**/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <qfile.h>
#include <qtextstream.h>
#include <qregexp.h>
#include <dcopclient.h>
#include <kcmdlineargs.h>
#include <kapplication.h>
#include <klocale.h>
#include <kaboutdata.h>
#include <kglobal.h>
#include <kstandarddirs.h>
#include <kprocess.h>
#include <kde_file.h>
static KCmdLineOptions options[] = {
{ "+old", I18N_NOOP("Old hostname"), 0 },
{ "+new", I18N_NOOP("New hostname"), 0 },
KCmdLineLastOption
};
static const char appName[] = "kdontchangethehostname";
static const char appVersion[] = "1.1";
class KHostName
{
public:
KHostName();
void changeX();
void changeDcop();
void changeStdDirs(const QCString &type);
void changeSessionManager();
protected:
QCString oldName;
QCString newName;
QCString display;
QCString home;
};
KHostName::KHostName()
{
KCmdLineArgs *args = KCmdLineArgs::parsedArgs();
if (args->count() != 2)
args->usage();
oldName = args->arg(0);
newName = args->arg(1);
if (oldName == newName)
exit(0);
home = ::getenv("HOME");
if (home.isEmpty())
{
fprintf(stderr, "%s", i18n("Error: HOME environment variable not set.\n").local8Bit().data());
exit(1);
}
display = ::getenv("DISPLAY");
// strip the screen number from the display
display.replace(QRegExp("\\.[0-9]+$"), "");
if (display.isEmpty())
{
fprintf(stderr, "%s", i18n("Error: DISPLAY environment variable not set.\n").local8Bit().data());
exit(1);
}
}
static QCStringList split(const QCString &str)
{
const char *s = str.data();
QCStringList result;
while (*s)
{
const char *i = strchr(s, ' ');
if (!i)
{
result.append(QCString(s));
return result;
}
result.append(QCString(s, i-s+1));
s = i;
while (*s == ' ') s++;
}
return result;
}
void KHostName::changeX()
{
QString cmd = "xauth list";
FILE *xFile = popen(QFile::encodeName(cmd), "r");
if (!xFile)
{
fprintf(stderr, "Warning: Can't run xauth.\n");
return;
}
QCStringList lines;
{
char buf[1024+1];
while (!feof(xFile))
{
QCString line = fgets(buf, 1024, xFile);
if (line.length())
line.truncate(line.length()-1); // Strip LF.
if (!line.isEmpty())
lines.append(line);
}
}
pclose(xFile);
for(QCStringList::ConstIterator it = lines.begin();
it != lines.end(); ++it)
{
QCStringList entries = split(*it);
if (entries.count() != 3)
continue;
QCString netId = entries[0];
QCString authName = entries[1];
QCString authKey = entries[2];
int i = netId.findRev(':');
if (i == -1)
continue;
QCString netDisplay = netId.mid(i);
if (netDisplay != display)
continue;
i = netId.find('/');
if (i == -1)
continue;
QCString newNetId = newName+netId.mid(i);
QCString oldNetId = netId.left(i);
if(oldNetId != oldName)
continue;
cmd = "xauth remove "+KProcess::quote(netId);
system(QFile::encodeName(cmd));
cmd = "xauth add ";
cmd += KProcess::quote(newNetId);
cmd += " ";
cmd += KProcess::quote(authName);
cmd += " ";
cmd += KProcess::quote(authKey);
system(QFile::encodeName(cmd));
}
}
void KHostName::changeDcop()
{
QCString origFNameOld = DCOPClient::dcopServerFileOld(oldName);
QCString fname = DCOPClient::dcopServerFile(oldName);
QCString origFName = fname;
FILE *dcopFile = fopen(fname.data(), "r");
if (!dcopFile)
{
fprintf(stderr, "Warning: Can't open '%s' for reading.\n", fname.data());
return;
}
QCString line1, line2;
{
char buf[1024+1];
line1 = fgets(buf, 1024, dcopFile);
if (line1.length())
line1.truncate(line1.length()-1); // Strip LF.
line2 = fgets(buf, 1024, dcopFile);
if (line2.length())
line2.truncate(line2.length()-1); // Strip LF.
}
fclose(dcopFile);
QCString oldNetId = line1;
if (!newName.isEmpty())
{
int i = line1.findRev(':');
if (i == -1)
{
fprintf(stderr, "Warning: File '%s' has unexpected format.\n", fname.data());
return;
}
line1 = "local/"+newName+line1.mid(i);
QCString newNetId = line1;
fname = DCOPClient::dcopServerFile(newName);
unlink(fname.data());
dcopFile = fopen(fname.data(), "w");
if (!dcopFile)
{
fprintf(stderr, "Warning: Can't open '%s' for writing.\n", fname.data());
return;
}
fputs(line1.data(), dcopFile);
fputc('\n', dcopFile);
fputs(line2.data(), dcopFile);
fputc('\n', dcopFile);
fclose(dcopFile);
QCString compatLink = DCOPClient::dcopServerFileOld(newName);
::symlink(fname.data(), compatLink.data()); // Compatibility link
// Update .ICEauthority
QString cmd = "iceauth list "+KProcess::quote("netid="+oldNetId);
FILE *iceFile = popen(QFile::encodeName(cmd), "r");
if (!iceFile)
{
fprintf(stderr, "Warning: Can't run iceauth.\n");
return;
}
QCStringList lines;
{
char buf[1024+1];
while (!feof(iceFile))
{
QCString line = fgets(buf, 1024, iceFile);
if (line.length())
line.truncate(line.length()-1); // Strip LF.
if (!line.isEmpty())
lines.append(line);
}
}
pclose(iceFile);
for(QCStringList::ConstIterator it = lines.begin();
it != lines.end(); ++it)
{
QCStringList entries = split(*it);
if (entries.count() != 5)
continue;
QCString protName = entries[0];
QCString netId = entries[2];
QCString authName = entries[3];
QCString authKey = entries[4];
if (netId != oldNetId)
continue;
cmd = "iceauth add ";
cmd += KProcess::quote(protName);
cmd += " '' ";
cmd += KProcess::quote(newNetId);
cmd += " ";
cmd += KProcess::quote(authName);
cmd += " ";
cmd += KProcess::quote(authKey);
system(QFile::encodeName(cmd));
}
}
// Remove old entries
{
QString cmd = "iceauth remove "+KProcess::quote("netid="+oldNetId);
system(QFile::encodeName(cmd));
unlink(origFName.data());
origFName = DCOPClient::dcopServerFileOld(oldName); // Compatibility link
unlink(origFName.data());
}
}
void KHostName::changeStdDirs(const QCString &type)
{
// We make links to the old dirs cause we can't delete the old dirs.
QCString oldDir = QFile::encodeName(QString("%1%2-%3").arg(KGlobal::dirs()->localkdedir()).arg(type).arg(oldName));
QCString newDir = QFile::encodeName(QString("%1%2-%3").arg(KGlobal::dirs()->localkdedir()).arg(type).arg(newName));
KDE_struct_stat st_buf;
int result = KDE_lstat(oldDir.data(), &st_buf);
if (result == 0)
{
if (S_ISLNK(st_buf.st_mode))
{
char buf[4096+1];
result = readlink(oldDir.data(), buf, 4096);
if (result >= 0)
{
buf[result] = 0;
result = symlink(buf, newDir.data());
}
}
else if (S_ISDIR(st_buf.st_mode))
{
result = symlink(oldDir.data(), newDir.data());
}
else
{
result = -1;
}
}
if (result != 0)
{
system(("lnusertemp "+type).data());
}
}
void KHostName::changeSessionManager()
{
QCString sm = ::getenv("SESSION_MANAGER");
if (sm.isEmpty())
{
fprintf(stderr, "Warning: No session management specified.\n");
return;
}
int i = sm.findRev(':');
if ((i == -1) || (sm.left(6) != "local/"))
{
fprintf(stderr, "Warning: Session Management socket '%s' has unexpected format.\n", sm.data());
return;
}
sm = "local/"+newName+sm.mid(i);
QCString name = "SESSION_MANAGER";
QByteArray params;
QDataStream stream(params, IO_WriteOnly);
stream << name << sm;
DCOPClient *client = new DCOPClient();
if (!client->attach())
{
fprintf(stderr, "Warning: DCOP communication problem, can't fix Session Management.\n");
delete client;
return;
}
QCString launcher = KApplication::launcher();
client->send(launcher, launcher, "setLaunchEnv(QCString,QCString)", params);
delete client;
}
int main(int argc, char **argv)
{
KLocale::setMainCatalogue("kdelibs");
KAboutData d(appName, I18N_NOOP("KDontChangeTheHostName"), appVersion,
I18N_NOOP("Informs KDE about a change in hostname"),
KAboutData::License_GPL, "(c) 2001 Waldo Bastian");
d.addAuthor("Waldo Bastian", I18N_NOOP("Author"), "bastian@kde.org");
KCmdLineArgs::init(argc, argv, &d);
KCmdLineArgs::addCmdLineOptions(options);
KInstance k(&d);
KHostName hn;
if(!getenv("XAUTHLOCALHOSTNAME"))
hn.changeX();
hn.changeDcop();
hn.changeStdDirs("socket");
hn.changeStdDirs("tmp");
hn.changeSessionManager();
}

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