Symbol: ISDOTDOT
sbin/umount/umount.c
736
if (ISDOT(name + 1) || ISDOTDOT(name + 1))
sbin/umount/umount.c
745
if (ISDOT(name) || ISDOTDOT(name))
sbin/umount/umount.c
761
} else if (ISDOTDOT(dirname)) {