1*1652Smckusick /* Copyright (c) 1979 Regents of the University of California */ 2*1652Smckusick 3*1652Smckusick static char sccsid[] = "@(#)FNIL.c 1.1 10/30/80"; 4*1652Smckusick 5*1652Smckusick #include "h00vars.h" 6*1652Smckusick #include "h01errs.h" 7*1652Smckusick 8*1652Smckusick char * 9*1652Smckusick FNIL(curfile) 10*1652Smckusick 11*1652Smckusick register struct iorec *curfile; 12*1652Smckusick { 13*1652Smckusick if (curfile->fblk >= MAXFILES || _actfile[curfile->fblk] != curfile) { 14*1652Smckusick ERROR(ENOFILE, 0); 15*1652Smckusick return; 16*1652Smckusick } 17*1652Smckusick if (curfile->funit & FDEF) { 18*1652Smckusick ERROR(EREFINAF, curfile->pfname); 19*1652Smckusick return; 20*1652Smckusick } 21*1652Smckusick if (curfile->funit & FREAD) { 22*1652Smckusick IOSYNC(curfile); 23*1652Smckusick if (curfile->funit & EOFF) { 24*1652Smckusick ERROR(EPASTEOF, curfile->pfname); 25*1652Smckusick return; 26*1652Smckusick } 27*1652Smckusick } 28*1652Smckusick return curfile->fileptr; 29*1652Smckusick } 30