Replace home made temp file creation with safer (and cleaner) Qt' solution. Should fix http://bugzilla.lyx.org/show_bug.cgi?id=4693

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@25822 a592a061-630c-0410-9148-cb99ea01b6c8

src/graphics/GraphicsCacheItem.cpp

@@ -422,10 +422,6 @@ void CacheItem::Impl::convertToDisplayFormat()
 	FileName const to_file_base = FileName::tempName("CacheItem");
 	remove_loaded_file_ = true;
 
-	// Remove the temp file, we only want the name...
-	// FIXME: This is unsafe!
-	to_file_base.removeFile();
-
 	// Connect a signal to this->imageConverted and pass this signal to
 	// the graphics converter so that we can load the modified file
 	// on completion of the conversion process.

src/graphics/GraphicsConverter.cpp

@@ -295,7 +295,6 @@ static void build_script(FileName const & from_file,
 	static int counter = 0;
 	string const tmp = "gconvert" + convert<string>(counter++);
 	FileName const to_base = FileName::tempName(tmp);
-	to_base.removeFile();
 
 	// Create a copy of the file in case the original name contains
 	// problematic characters like ' or ". We can work around that problem

src/insets/InsetExternal.cpp

@@ -69,8 +69,6 @@ namespace external {
 TempName::TempName()
 {
 	FileName const tempname = FileName::tempName("lyxext");
-	// FIXME: This is unsafe
-	tempname.removeFile();
 	// must have an extension for the converter code to work correctly.
 	tempname_ = FileName(tempname.absFilename() + ".tmp");
 }

src/support/FileName.cpp

@@ -26,6 +26,7 @@
 #include <QFile>
 #include <QFileInfo>
 #include <QList>
+#include <QTemporaryFile>
 #include <QTime>
 
 #include "support/lassert.h"
@@ -308,14 +309,8 @@ bool FileName::isWritable() const
 bool FileName::isDirWritable() const
 {
 	LYXERR(Debug::FILES, "isDirWriteable: " << *this);
-
 	FileName const tmpfl = FileName::tempName(absFilename() + "/lyxwritetest");
-
-	if (tmpfl.empty())
-		return false;
-
-	tmpfl.removeFile();
-	return true;
+	return !tmpfl.empty();
 }
 
 
@@ -352,32 +347,6 @@ FileNameList FileName::dirList(string const & ext) const
 }
 
 
-static int make_tempfile(char * templ)
-{
-#if defined(HAVE_MKSTEMP)
-	return ::mkstemp(templ);
-#elif defined(HAVE_MKTEMP)
-	// This probably just barely works...
-	::mktemp(templ);
-# if defined (HAVE_OPEN)
-# if (!defined S_IRUSR)
-#   define S_IRUSR S_IREAD
-#   define S_IWUSR S_IWRITE
-# endif
-	return ::open(templ, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
-# elif defined (HAVE__OPEN)
-	return ::_open(templ,
-		       _O_RDWR | _O_CREAT | _O_EXCL,
-		       _S_IREAD | _S_IWRITE);
-# else
-#  error No open() function.
-# endif
-#else
-#error FIX FIX FIX
-#endif
-}
-
-
 FileName FileName::tempName(string const & mask)
 {
 	FileName tmp_name(mask);
@@ -387,33 +356,11 @@ FileName FileName::tempName(string const & mask)
 	else
 		tmpfl = package().temp_dir().absFilename() + "/" + mask;
 
-#if defined (HAVE_GETPID)
-	tmpfl += convert<string>(getpid());
-#elif defined (HAVE__GETPID)
-	tmpfl += convert<string>(_getpid());
-#else
-# error No getpid() function
-#endif
-	tmpfl += "XXXXXX";
-
-	// The supposedly safe mkstemp version
-	// FIXME: why not using std::string directly?
-	boost::scoped_array<char> tmpl(new char[tmpfl.length() + 1]); // + 1 for '\0'
-	tmpfl.copy(tmpl.get(), string::npos);
-	tmpl[tmpfl.length()] = '\0'; // terminator
-
-	int const tmpf = make_tempfile(tmpl.get());
-	if (tmpf != -1) {
-		string const t(to_utf8(from_filesystem8bit(tmpl.get())));
-#if defined (HAVE_CLOSE)
-		::close(tmpf);
-#elif defined (HAVE__CLOSE)
-		::_close(tmpf);
-#else
-# error No x() function.
-#endif
-		LYXERR(Debug::FILES, "Temporary file `" << t << "' created.");
-		return FileName(t);
+	QTemporaryFile qt_tmp(toqstr(tmpfl));
+	if (qt_tmp.open()) {
+		tmp_name.d->fi.setFile(qt_tmp.fileName());
+		LYXERR(Debug::FILES, "Temporary file `" << tmp_name << "' created.");
+		return tmp_name;
 	}
 	LYXERR(Debug::FILES, "LyX Error: Unable to create temporary file.");
 	return FileName();

src/support/filetools.cpp

@@ -323,11 +323,6 @@ static FileName createTmpDir(FileName const & tempdir, string const & mask)
 
 	string const tmp_dir = tempdir.absFilename() + "/" + mask;
 	FileName const tmpfl = FileName::tempName(tmp_dir);
-	// FileName::tempName actually creates a file to make sure that it
-	// stays unique. So we have to delete it before we can create
-	// a dir with the same name. Note also that we are not thread
-	// safe because of the gap between unlink and mkdir. (Lgb)
-	tmpfl.removeFile();
 
 	if (tmpfl.empty() || !tmpfl.createDirectory(0700)) {
 		LYXERR0("LyX could not create the temporary directory '" << tmp_dir