blob: fd18d458da26d5e420d15dfc7e33f37f04d63085 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
/*
* Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
* All rights reserved.
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*/
#include <sm/gen.h>
SM_RCSID("@(#)$Sendmail: fpurge.c,v 1.18 2001/01/28 00:29:35 ca Exp $")
#include <stdlib.h>
#include <errno.h>
#include <sm/io.h>
#include <sm/assert.h>
#include "local.h"
/*
** SM_IO_PURGE -- purge/empty the buffer without committing buffer content
**
** Parameters:
** fp -- file pointer to purge
**
** Returns:
** Failure: returns SM_IO_EOF and sets errno
** Success: returns 0 (zero)
*/
int
sm_io_purge(fp)
register SM_FILE_T *fp;
{
SM_REQUIRE_ISA(fp, SmFileMagic);
if (!fp->f_flags)
{
errno = EBADF;
return SM_IO_EOF;
}
if (HASUB(fp))
FREEUB(fp);
fp->f_p = fp->f_bf.smb_base;
fp->f_r = 0;
/* implies SMFBF */
fp->f_w = fp->f_flags & (SMLBF|SMNBF) ? 0 : fp->f_bf.smb_size;
return 0;
}
|
