1N/A/*
1N/A * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
1N/A * All rights reserved.
1N/A * Copyright (c) 1990, 1993
1N/A * The Regents of the University of California. All rights reserved.
1N/A *
1N/A * This code is derived from software contributed to Berkeley by
1N/A * Chris Torek.
1N/A *
1N/A * By using this file, you agree to the terms and conditions set
1N/A * forth in the LICENSE file which can be found at the top level of
1N/A * the sendmail distribution.
1N/A */
1N/A
1N/A#pragma ident "%Z%%M% %I% %E% SMI"
1N/A
1N/A#include <sm/gen.h>
1N/ASM_RCSID("@(#)$Id: fpurge.c,v 1.18 2001/01/28 00:29:35 ca Exp $")
1N/A#include <stdlib.h>
1N/A#include <errno.h>
1N/A#include <sm/io.h>
1N/A#include <sm/assert.h>
1N/A#include "local.h"
1N/A
1N/A/*
1N/A** SM_IO_PURGE -- purge/empty the buffer without committing buffer content
1N/A**
1N/A** Parameters:
1N/A** fp -- file pointer to purge
1N/A**
1N/A** Returns:
1N/A** Failure: returns SM_IO_EOF and sets errno
1N/A** Success: returns 0 (zero)
1N/A*/
1N/A
1N/Aint
1N/Asm_io_purge(fp)
1N/A register SM_FILE_T *fp;
1N/A{
1N/A SM_REQUIRE_ISA(fp, SmFileMagic);
1N/A if (!fp->f_flags)
1N/A {
1N/A errno = EBADF;
1N/A return SM_IO_EOF;
1N/A }
1N/A
1N/A if (HASUB(fp))
1N/A FREEUB(fp);
1N/A fp->f_p = fp->f_bf.smb_base;
1N/A fp->f_r = 0;
1N/A
1N/A /* implies SMFBF */
1N/A fp->f_w = fp->f_flags & (SMLBF|SMNBF) ? 0 : fp->f_bf.smb_size;
1N/A return 0;
1N/A}