Add CFile::Sync()

This adds a simple wrapper for fsync() to CFileUtils.


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1431 726aef4b-f618-498e-8847-2d620e286838

FileUtils.cpp

@@ -254,6 +254,14 @@ bool CFile::Truncate() {
 	return false;
 }
 
+bool CFile::Sync() {
+	if (m_iFD != -1 && fsync(m_iFD) == 0) {
+		return true;
+	}
+
+	return false;
+}
+
 bool CFile::Open(const CString& sFileName, int iFlags, mode_t iMode) {
 	SetFileName(sFileName);
 	return Open(iFlags, iMode);