/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 as published by the Free Software Foundation** and appearing in the file LICENSE.GPL included in the packaging of** this file.  Please review the following information to ensure GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#include "qplatformdefs.h"#include "qtemporaryfile.h"#include "qabstractfileengine.h"#include "private/qfile_p.h"#include "private/qabstractfileengine_p.h"#include "private/qfsfileengine_p.h"#include <stdlib.h>#include <errno.h>#include <sys/stat.h>#include <sys/types.h>#include <stdlib.h>#include <time.h>#include <ctype.h>#include <sys/types.h>#ifdef Q_OS_WIN#include <process.h>#if defined(_MSC_VER) && _MSC_VER >= 1400#include <share.h>#endif#endif/* * Copyright (c) 1987, 1993 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */static int _gettemp(char *path, int *doopen, int domkdir, int slen){	char *start, *trv, *suffp;	struct stat sbuf;	int rval;#ifdef Q_OS_WIN    int pid;#else	pid_t pid;#endif	if (doopen && domkdir) {		errno = EINVAL;		return(0);	}	for (trv = path; *trv; ++trv)		;	trv -= slen;	suffp = trv;	--trv;	if (trv < path) {		errno = EINVAL;		return (0);	}#if defined(Q_OS_WIN) && defined(_MSC_VER) && _MSC_VER >= 1400        pid = _getpid();#else        pid = getpid();#endif	while (trv >= path && *trv == 'X' && pid != 0) {		*trv-- = (pid % 10) + '0';		pid /= 10;        }#ifndef S_ISDIR#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)#endif        while (trv >= path && *trv == 'X') {            char c;            // CHANGE arc4random() -> random()            pid = (qrand() & 0xffff) % (26+26);		if (pid < 26)			c = pid + 'A';		else			c = (pid - 26) + 'a';		*trv-- = c;	}	start = trv + 1;	/*	 * check the target directory; if you have six X's and it	 * doesn't exist this runs for a *very* long time.	 */	if (doopen || domkdir) {		for (;; --trv) {			if (trv <= path)				break;			if (*trv == '/') {				*trv = '\0';				rval = stat(path, &sbuf);				*trv = '/';				if (rval != 0)					return(0);				if (!S_ISDIR(sbuf.st_mode)) {					errno = ENOTDIR;					return(0);				}				break;			}		}	}	for (;;) {		if (doopen) {#if defined(Q_OS_WIN) && defined(_MSC_VER) && _MSC_VER >= 1400                        if (_sopen_s(doopen, path, O_CREAT|O_EXCL|O_RDWR|O_BINARY, _SH_DENYNO, _S_IREAD | _S_IWRITE)== 0)#else                        if ((*doopen =                            open(path, O_CREAT|O_EXCL|O_RDWR#  if defined(Q_OS_WIN)                                 |O_BINARY#  endif                                 , 0600)) >= 0)#endif				return(1);			if (errno != EEXIST)				return(0);		} else if (domkdir) {#ifdef Q_OS_WIN                    if (QT_MKDIR(path) == 0)#else                    if (mkdir(path, 0700) == 0)#endif				return(1);			if (errno != EEXIST)				return(0);            }#ifndef Q_OS_WIN            else if (lstat(path, &sbuf))			return(errno == ENOENT ? 1 : 0);#endif		/* tricky little algorwwithm for backward compatibility */		for (trv = start;;) {			if (!*trv)				return (0);			if (*trv == 'Z') {				if (trv == suffp)					return (0);				*trv++ = 'a';			} else {				if (isdigit(*trv))					*trv = 'a';				else if (*trv == 'z')	/* inc from z to A */					*trv = 'A';				else {					if (trv == suffp)						return (0);					++*trv;				}				break;			}		}	}	/*NOTREACHED*/}static int qt_mkstemps(char *path, int slen){	int fd;	return (_gettemp(path, &fd, 0, slen) ? fd : -1);}//************* QTemporaryFileEngineclass QTemporaryFileEngine : public QFSFileEngine{    Q_DECLARE_PRIVATE(QFSFileEngine)public:    QTemporaryFileEngine(const QString &file) : QFSFileEngine(file) { }    ~QTemporaryFileEngine();    bool open(QIODevice::OpenMode flags);    bool remove();    bool close();};QTemporaryFileEngine::~QTemporaryFileEngine(){}bool QTemporaryFileEngine::open(QIODevice::OpenMode){    Q_D(QFSFileEngine);    QString qfilename = d->file;    if(!qfilename.contains(QLatin1String("XXXXXX")))        qfilename += QLatin1String(".XXXXXX");    int suffixLength = qfilename.length() - (qfilename.lastIndexOf(QLatin1String("XXXXXX"), -1, Qt::CaseSensitive) + 6);    d->closeFileHandle = true;    char *filename = qstrdup(qfilename.toLocal8Bit());    d->fd = qt_mkstemps(filename, suffixLength);    if(d->fd != -1) {        d->file = QString::fromLocal8Bit(filename); //changed now!        delete [] filename;        d->sequential = 0;        return true;    }    delete [] filename;    setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError, qt_error_string(errno));    return false;}bool QTemporaryFileEngine::remove(){    Q_D(QFSFileEngine);    // Since the QTemporaryFileEngine::close() does not really close the file,    // we must explicitly call QFSFileEngine::close() before we remove it.    QFSFileEngine::close();    bool removed = QFSFileEngine::remove();    d->file.clear();    return removed;}bool QTemporaryFileEngine::close(){    // Don't close the file, just seek to the front.    seek(0);    setError(QFile::UnspecifiedError, QString());    return true;}//************* QTemporaryFilePrivateclass QTemporaryFilePrivate : public QFilePrivate{    Q_DECLARE_PUBLIC(QTemporaryFile)protected:    QTemporaryFilePrivate();    ~QTemporaryFilePrivate();    bool autoRemove;    QString templateName;    mutable QTemporaryFileEngine *fileEngine;};QTemporaryFilePrivate::QTemporaryFilePrivate() : autoRemove(true), fileEngine(0){}QTemporaryFilePrivate::~QTemporaryFilePrivate(){    delete fileEngine;    fileEngine = 0;}//************* QTemporaryFile/*!    \class QTemporaryFile    \reentrant    \brief The QTemporaryFile class is an I/O device that operates on temporary files.    \ingroup io