/*- * Copyright (c) 1979 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that: (1) source distributions retain this entire copyright * notice and comment, and (2) distributions including binaries display * the following acknowledgement: ``This product includes software * developed by the University of California, Berkeley and its contributors'' * in the documentation or other materials provided with the distribution * and in all advertising materials mentioning features or use of this * software. Neither the name of the University nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint static char sccsid[] = "@(#)UNSYNC.c 1.5 (Berkeley) 4/9/90"; #endif /* not lint */ #include "h00vars.h" /* * push back last char read to prepare for formatted read */ UNSYNC(curfile) register struct iorec *curfile; { if (curfile->funit & FWRITE) { ERROR("%s: Attempt to read, but open for writing\n", curfile->pfname); return; } if (curfile->funit & EOFF) { ERROR("%s: Tried to read past end of file\n", curfile->pfname); return; } if ((curfile->funit & SYNC) == 0) { ungetc(*curfile->fileptr, curfile->fbuf); } curfile->funit &= ~EOLN; curfile->funit |= SYNC; }