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tdelibs/kdecore/ktempfile.cpp

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/*
*
* This file is part of the KDE libraries
* Copyright (c) 1999 Waldo Bastian <bastian@kde.org>
*
* $Id$
*
* 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 <config.h>
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#ifdef HAVE_TEST
#include <test.h>
#endif
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifndef _PATH_TMP
#define _PATH_TMP "/tmp"
#endif
#include <tqdatetime.h>
#include <tqfile.h>
#include <tqdatastream.h>
#include <tqtextstream.h>
#include "kglobal.h"
#include "kapplication.h"
#include "kinstance.h"
#include "ktempfile.h"
#include "kstandarddirs.h"
#include "kde_file.h"
#include "kdebug.h"
/* antlarr: KDE 4: make the parameters const TQString & */
KTempFile::KTempFile(TQString filePrefix, TQString fileExtension, int mode)
{
bAutoDelete = false;
mFd = -1;
mStream = 0;
mFile = 0;
mTextStream = 0;
mDataStream = 0;
mError = 0;
bOpen = false;
if (fileExtension.isEmpty())
fileExtension = ".tmp";
if (filePrefix.isEmpty())
{
filePrefix = locateLocal("tmp", KGlobal::instance()->instanceName());
}
(void) create(filePrefix, fileExtension, mode);
}
KTempFile::KTempFile(bool)
{
bAutoDelete = false;
mFd = -1;
mStream = 0;
mFile = 0;
mTextStream = 0;
mDataStream = 0;
mError = 0;
bOpen = false;
}
bool
KTempFile::create(const TQString &filePrefix, const TQString &fileExtension,
int mode)
{
// make sure the random seed is randomized
(void) KApplication::random();
TQCString ext = TQFile::encodeName(fileExtension);
TQCString nme = TQFile::encodeName(filePrefix) + "XXXXXX" + ext;
if((mFd = mkstemps(nme.data(), ext.length())) < 0)
{
// Recreate it for the warning, mkstemps emptied it
TQCString nme = TQFile::encodeName(filePrefix) + "XXXXXX" + ext;
kdWarning() << "KTempFile: Error trying to create " << nme << ": " << strerror(errno) << endl;
mError = errno;
mTmpName = TQString::null;
return false;
}
// got a file descriptor. nme contains the name
mTmpName = TQFile::decodeName(nme);
mode_t tmp = 0;
mode_t umsk = umask(tmp);
umask(umsk);
fchmod(mFd, mode&(~umsk));
// Success!
bOpen = true;
// Set uid/gid (necessary for SUID programs)
fchown(mFd, getuid(), getgid());
// Set close on exec
fcntl(mFd, F_SETFD, FD_CLOEXEC);
return true;
}
KTempFile::~KTempFile()
{
close();
if (bAutoDelete)
unlink();
}
int
KTempFile::status() const
{
return mError;
}
QString
KTempFile::name() const
{
return mTmpName;
}
int
KTempFile::handle() const
{
return mFd;
}
FILE *
KTempFile::fstream()
{
if (mStream) return mStream;
if (mFd < 0) return 0;
// Create a stream
mStream = KDE_fdopen(mFd, "r+");
if (!mStream) {
kdWarning() << "KTempFile: Error trying to open " << mTmpName << ": " << strerror(errno) << endl;
mError = errno;
}
return mStream;
}
TQFile *
KTempFile::file()
{
if (mFile) return mFile;
if ( !fstream() ) return 0;
mFile = new TQFile();
mFile->setName( name() );
mFile->open(IO_ReadWrite, mStream);
return mFile;
}
TQTextStream *
KTempFile::textStream()
{
if (mTextStream) return mTextStream;
if ( !file() ) return 0; // Initialize mFile
mTextStream = new TQTextStream( mFile );
return mTextStream;
}
TQDataStream *
KTempFile::dataStream()
{
if (mDataStream) return mDataStream;
if ( !file() ) return 0; // Initialize mFile
mDataStream = new TQDataStream( mFile );
return mDataStream;
}
void
KTempFile::unlink()
{
if (!mTmpName.isEmpty())
TQFile::remove( mTmpName );
mTmpName = TQString::null;
}
#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0
#define FDATASYNC fdatasync
#else
#define FDATASYNC fsync
#endif
bool
KTempFile::sync()
{
int result = 0;
if (mStream)
{
do {
result = fflush(mStream); // We need to flush first otherwise fsync may not have our data
}
while ((result == -1) && (errno == EINTR));
if (result)
{
kdWarning() << "KTempFile: Error trying to flush " << mTmpName << ": " << strerror(errno) << endl;
mError = errno;
}
}
if (mFd >= 0)
{
if( qstrcmp( getenv( "KDE_EXTRA_FSYNC" ), "1" ) == 0 )
{
result = FDATASYNC(mFd);
if (result)
{
kdWarning() << "KTempFile: Error trying to sync " << mTmpName << ": " << strerror(errno) << endl;
mError = errno;
}
}
}
return (mError == 0);
}
#undef FDATASYNC
bool
KTempFile::close()
{
int result = 0;
delete mTextStream; mTextStream = 0;
delete mDataStream; mDataStream = 0;
delete mFile; mFile = 0;
if (mStream)
{
result = ferror(mStream);
if (result)
mError = ENOSPC; // Assume disk full.
result = fclose(mStream);
mStream = 0;
mFd = -1;
if (result != 0) {
kdWarning() << "KTempFile: Error trying to close " << mTmpName << ": " << strerror(errno) << endl;
mError = errno;
}
}
if (mFd >= 0)
{
result = ::close(mFd);
mFd = -1;
if (result != 0) {
kdWarning() << "KTempFile: Error trying to close " << mTmpName << ": " << strerror(errno) << endl;
mError = errno;
}
}
bOpen = false;
return (mError == 0);
}