1 /*- 2 * Copyright (c) 1979, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)FNIL.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 #include "h00vars.h" 13 14 char * 15 FNIL(curfile) 16 17 register struct iorec *curfile; 18 { 19 if (curfile->fblk >= MAXFILES || _actfile[curfile->fblk] != curfile) { 20 ERROR("Reference to an inactive file\n", 0); 21 } 22 if (curfile->funit & FDEF) { 23 ERROR("%s: Reference to an inactive file\n", curfile->pfname); 24 } 25 if (curfile->funit & FREAD) { 26 IOSYNC(curfile); 27 } 28 return curfile->fileptr; 29 } 30