2 * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
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.
16 SM_RCSID("@(#)$Id: fpurge.c,v 1.20 2001/09/11 04:04:48 gshapiro Exp $")
20 #include <sm/assert.h>
24 ** SM_IO_PURGE -- purge/empty the buffer without committing buffer content
27 ** fp -- file pointer to purge
30 ** Failure: returns SM_IO_EOF and sets errno
31 ** Success: returns 0 (zero)
36 register SM_FILE_T *fp;
38 SM_REQUIRE_ISA(fp, SmFileMagic);
47 fp->f_p = fp->f_bf.smb_base;
51 fp->f_w = fp->f_flags & (SMLBF|SMNBF) ? 0 : fp->f_bf.smb_size;