usr/src/cmd/sendmail/libsm/rewind.c

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