Fix wrong character 'X' to 'x' in lib_mode2oflags function
@@ -213,7 +213,7 @@ static int lib_mode2oflags(FAR const char *mode)
/* Open for exclusive access ("{r|w|a|b|+}x") */
- case 'X':
+ case 'x':
if ((state & MODE_MASK) != MODE_NONE) {
/* The file is opened in exclusive mode */
