//ZK2(wr1){QC(x)x=jc(x,0);QC(y)unlink(x);I d=open(x,0102,06…
//ZK2(wr1){QC(x)x=jc(x,0);QC(y)unlink(x);I d=open(x,0102,0666);Qs(0>d,x)ftruncate(d,yn);R x=X0(ma(1,d,0,yn)),dsn(x,y,yn),mu(x,yn),Y0(NL);}
//ZK2(wr1){QC(x)x=jc(x,0);QC(y)unlink(x);I d=open(x,0102,0666);Qs(0>d,x)ftruncate(d,yn);R x=X0(ma(1,d,0,yn)),dsn(x,y,yn),mu(x,yn),Y0(NL);}