XUSR               59 maint/gnulib/lib/modechange.c            && S_IRUSR == RUSR && S_IWUSR == WUSR && S_IXUSR == XUSR
XUSR               68 maint/gnulib/lib/modechange.c                       | (octal & XUSR ? S_IXUSR : 0)