RGRP               60 maint/gnulib/lib/modechange.c            && S_IRGRP == RGRP && S_IWGRP == WGRP && S_IXGRP == XGRP
RGRP               69 maint/gnulib/lib/modechange.c                       | (octal & RGRP ? S_IRGRP : 0)