1 /* 2 * Copyright (c) 1987 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific written prior permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 */ 12 13 #if defined(LIBC_SCCS) && !defined(lint) 14 static char sccsid[] = "@(#)rewind.c 5.3 (Berkeley) 12/02/87"; 15 #endif /* LIBC_SCCS and not lint */ 16 17 #include <sys/types.h> 18 #include <sys/file.h> 19 #include <stdio.h> 20 21 rewind(iop) 22 register FILE *iop; 23 { 24 off_t lseek(); 25 26 (void)fflush(iop); 27 (void)lseek(fileno(iop), 0L, L_SET); 28 iop->_cnt = 0; 29 iop->_ptr = iop->_base; 30 iop->_flag &= ~(_IOERR|_IOEOF); 31 if (iop->_flag & _IORW) 32 iop->_flag &= ~(_IOREAD|_IOWRT); 33 } 34