xref: /illumos-gate/usr/src/cmd/sendmail/libsm/rewind.c (revision 7c478bd95313f5f23a4c958a745db2134aa0324)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
3*7c478bd9Sstevel@tonic-gate  *      All rights reserved.
4*7c478bd9Sstevel@tonic-gate  * Copyright (c) 1990, 1993
5*7c478bd9Sstevel@tonic-gate  *	The Regents of the University of California.  All rights reserved.
6*7c478bd9Sstevel@tonic-gate  *
7*7c478bd9Sstevel@tonic-gate  * This code is derived from software contributed to Berkeley by
8*7c478bd9Sstevel@tonic-gate  * Chris Torek.
9*7c478bd9Sstevel@tonic-gate  *
10*7c478bd9Sstevel@tonic-gate  * By using this file, you agree to the terms and conditions set
11*7c478bd9Sstevel@tonic-gate  * forth in the LICENSE file which can be found at the top level of
12*7c478bd9Sstevel@tonic-gate  * the sendmail distribution.
13*7c478bd9Sstevel@tonic-gate  */
14*7c478bd9Sstevel@tonic-gate 
15*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
16*7c478bd9Sstevel@tonic-gate 
17*7c478bd9Sstevel@tonic-gate #include <sm/gen.h>
18*7c478bd9Sstevel@tonic-gate SM_RCSID("@(#)$Id: rewind.c,v 1.16 2001/04/03 01:46:40 ca Exp $")
19*7c478bd9Sstevel@tonic-gate #include <errno.h>
20*7c478bd9Sstevel@tonic-gate #include <sm/io.h>
21*7c478bd9Sstevel@tonic-gate #include <sm/assert.h>
22*7c478bd9Sstevel@tonic-gate #include "local.h"
23*7c478bd9Sstevel@tonic-gate 
24*7c478bd9Sstevel@tonic-gate /*
25*7c478bd9Sstevel@tonic-gate **  SM_IO_REWIND -- rewind the file
26*7c478bd9Sstevel@tonic-gate **
27*7c478bd9Sstevel@tonic-gate **	Seeks the file to the begining and clears any outstanding errors.
28*7c478bd9Sstevel@tonic-gate **
29*7c478bd9Sstevel@tonic-gate **	Parameters:
30*7c478bd9Sstevel@tonic-gate **		fp -- the flie pointer for rewind
31*7c478bd9Sstevel@tonic-gate **		timeout -- time to complete the rewind
32*7c478bd9Sstevel@tonic-gate **
33*7c478bd9Sstevel@tonic-gate **	Returns:
34*7c478bd9Sstevel@tonic-gate **		none.
35*7c478bd9Sstevel@tonic-gate */
36*7c478bd9Sstevel@tonic-gate 
37*7c478bd9Sstevel@tonic-gate void
38*7c478bd9Sstevel@tonic-gate sm_io_rewind(fp, timeout)
39*7c478bd9Sstevel@tonic-gate 	register SM_FILE_T *fp;
40*7c478bd9Sstevel@tonic-gate 	int timeout;
41*7c478bd9Sstevel@tonic-gate {
42*7c478bd9Sstevel@tonic-gate 	SM_REQUIRE_ISA(fp, SmFileMagic);
43*7c478bd9Sstevel@tonic-gate 	(void) sm_io_seek(fp, timeout, 0L, SM_IO_SEEK_SET);
44*7c478bd9Sstevel@tonic-gate 	(void) sm_io_clearerr(fp);
45*7c478bd9Sstevel@tonic-gate 	errno = 0;      /* not required, but seems reasonable */
46*7c478bd9Sstevel@tonic-gate }
47