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 the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #if defined(LIBC_SCCS) && !defined(lint) 19 static char sccsid[] = "@(#)rewind.c 5.4 (Berkeley) 06/27/88"; 20 #endif /* LIBC_SCCS and not lint */ 21 22 #include <sys/types.h> 23 #include <sys/file.h> 24 #include <stdio.h> 25 26 rewind(iop) 27 register FILE *iop; 28 { 29 off_t lseek(); 30 31 (void)fflush(iop); 32 (void)lseek(fileno(iop), 0L, L_SET); 33 iop->_cnt = 0; 34 iop->_ptr = iop->_base; 35 iop->_flag &= ~(_IOERR|_IOEOF); 36 if (iop->_flag & _IORW) 37 iop->_flag &= ~(_IOREAD|_IOWRT); 38 } 39