+ m_strName = strName;
+
+ // we want to create the file in the same directory as strName because
+ // otherwise rename() in Commit() might not work (if the files are on
+ // different partitions for example). Unfortunately, the only standard
+ // (POSIX) temp file creation function tmpnam() can't do it.
+#if defined(__UNIX__) || defined(__WXSTUBS__)|| defined( __WXMAC__ )
+ static const wxChar *szMktempSuffix = wxT("XXXXXX");
+ m_strTemp << strName << szMktempSuffix;
+ // can use the cast because length doesn't change
+ mktemp(wxMBSTRINGCAST m_strTemp.mb_str());
+#elif defined(__WXPM__)
+ // for now just create a file
+ // future enhancements can be to set some extended attributes for file systems
+ // OS/2 supports that have them (HPFS, FAT32) and security (HPFS386)
+ static const wxChar *szMktempSuffix = wxT("XXX");
+ m_strTemp << strName << szMktempSuffix;
+ mkdir(m_strTemp.GetWriteBuf(MAX_PATH));
+#else // Windows
+ wxString strPath;
+ wxSplitPath(strName, &strPath, NULL, NULL);
+ if ( strPath.IsEmpty() )
+ strPath = wxT('.'); // GetTempFileName will fail if we give it empty string
+#ifdef __WIN32__
+ if ( !GetTempFileName(strPath, wxT("wx_"),0, m_strTemp.GetWriteBuf(MAX_PATH)) )
+#else
+ // Not sure why MSVC++ 1.5 header defines first param as BYTE - bug?
+ if ( !GetTempFileName((BYTE) (DWORD)(const wxChar*) strPath, wxT("wx_"),0, m_strTemp.GetWriteBuf(MAX_PATH)) )
+#endif
+ wxLogLastError(wxT("GetTempFileName"));
+ m_strTemp.UngetWriteBuf();
+#endif // Windows/Unix
+
+ int access = wxS_DEFAULT;
+#ifdef __UNIX__
+ // create the file with the same mode as the original one under Unix
+ mode_t umaskOld = 0; // just to suppress compiler warning
+ bool changedUmask;
+
+ struct stat st;
+ if ( stat(strName.fn_str(), &st) == 0 )
+ {
+ // this assumes that only lower bits of st_mode contain the access
+ // rights, but it's true for at least all Unices which have S_IXXXX()
+ // macros, so should not be less portable than using (not POSIX)
+ // S_IFREG &c
+ access = st.st_mode & 0777;
+
+ // we want to create the file with exactly the same access rights as
+ // the original one, so disable the user's umask for the moment
+ umaskOld = umask(0);
+ changedUmask = TRUE;
+ }
+ else
+ {
+ // file probably didn't exist, just create with default mode _using_
+ // user's umask (new files creation should respet umask)
+ changedUmask = FALSE;
+ }
+#endif // Unix
+
+ bool ok = m_file.Open(m_strTemp, wxFile::write, access);
+
+#ifdef __UNIX__
+ if ( changedUmask )
+ {
+ // restore umask now that the file is created
+ (void)umask(umaskOld);
+ }
+#endif // Unix
+
+ return ok;