A.stat B.stdio C.file D.types
A.文件結構 B.硬盤 C.目錄結構 D.內存
A.intmsgget(key,flags) B.intmsgsnd(qid,buf,nbytes,flags) C.intmsgrcv(qid,buf,nbytes,mtype,flags) D.intmsgctl(qid,cmd,sbuf)