/********************************************************************** * Copyright (c) Digital Equipment Corporation 1984, 1985, 1986. * * All Rights Reserved. * * Reference "/usr/src/COPYRIGHT" for applicable restrictions. * **********************************************************************/ /* * SCCSID: @(#)findiop.c 3.0 4/22/86 */ #include <stdio.h> FILE * _findiop() { extern FILE *_lastbuf; register FILE *iop; for(iop = _iob; iop->_flag & (_IOREAD|_IOWRT|_IORW); iop++) if (iop >= _lastbuf) return(NULL); return(iop); }