taglinefilesource code
F_UNLCK61fs/locks.cif (flock.l_type == F_UNLCK)
F_UNLCK79fs/locks.cflock.l_type = F_UNLCK;      /* no conflict found */
F_UNLCK113fs/locks.ccase F_UNLCK :
F_UNLCK121fs/locks.cif (file_lock.fl_type == F_UNLCK)
F_UNLCK184fs/locks.cif (l->l_type != F_UNLCK && l->l_type != F_RDLCK && l->l_type != F_WRLCK)