140266059SGregory Neil Shapiro /* 25dd76dd0SGregory Neil Shapiro * Copyright (c) 2000-2001 Proofpoint, Inc. and its suppliers. 340266059SGregory Neil Shapiro * All rights reserved. 440266059SGregory Neil Shapiro * Copyright (c) 1990, 1993 540266059SGregory Neil Shapiro * The Regents of the University of California. All rights reserved. 640266059SGregory Neil Shapiro * 740266059SGregory Neil Shapiro * This code is derived from software contributed to Berkeley by 840266059SGregory Neil Shapiro * Chris Torek. 940266059SGregory Neil Shapiro * 1040266059SGregory Neil Shapiro * By using this file, you agree to the terms and conditions set 1140266059SGregory Neil Shapiro * forth in the LICENSE file which can be found at the top level of 1240266059SGregory Neil Shapiro * the sendmail distribution. 1340266059SGregory Neil Shapiro */ 1440266059SGregory Neil Shapiro 1540266059SGregory Neil Shapiro #include <sm/gen.h> 16*4313cc83SGregory Neil Shapiro SM_RCSID("@(#)$Id: fpurge.c,v 1.21 2013-11-22 20:51:42 ca Exp $") 1740266059SGregory Neil Shapiro #include <stdlib.h> 1840266059SGregory Neil Shapiro #include <errno.h> 1940266059SGregory Neil Shapiro #include <sm/io.h> 2040266059SGregory Neil Shapiro #include <sm/assert.h> 2140266059SGregory Neil Shapiro #include "local.h" 2240266059SGregory Neil Shapiro 2340266059SGregory Neil Shapiro /* 2440266059SGregory Neil Shapiro ** SM_IO_PURGE -- purge/empty the buffer without committing buffer content 2540266059SGregory Neil Shapiro ** 2640266059SGregory Neil Shapiro ** Parameters: 2740266059SGregory Neil Shapiro ** fp -- file pointer to purge 2840266059SGregory Neil Shapiro ** 2940266059SGregory Neil Shapiro ** Returns: 3040266059SGregory Neil Shapiro ** Failure: returns SM_IO_EOF and sets errno 3140266059SGregory Neil Shapiro ** Success: returns 0 (zero) 3240266059SGregory Neil Shapiro */ 3340266059SGregory Neil Shapiro 3440266059SGregory Neil Shapiro int 3540266059SGregory Neil Shapiro sm_io_purge(fp) 3640266059SGregory Neil Shapiro register SM_FILE_T *fp; 3740266059SGregory Neil Shapiro { 3840266059SGregory Neil Shapiro SM_REQUIRE_ISA(fp, SmFileMagic); 3940266059SGregory Neil Shapiro if (!fp->f_flags) 4040266059SGregory Neil Shapiro { 4140266059SGregory Neil Shapiro errno = EBADF; 4240266059SGregory Neil Shapiro return SM_IO_EOF; 4340266059SGregory Neil Shapiro } 4440266059SGregory Neil Shapiro 4540266059SGregory Neil Shapiro if (HASUB(fp)) 4640266059SGregory Neil Shapiro FREEUB(fp); 4740266059SGregory Neil Shapiro fp->f_p = fp->f_bf.smb_base; 4840266059SGregory Neil Shapiro fp->f_r = 0; 4940266059SGregory Neil Shapiro 5040266059SGregory Neil Shapiro /* implies SMFBF */ 5140266059SGregory Neil Shapiro fp->f_w = fp->f_flags & (SMLBF|SMNBF) ? 0 : fp->f_bf.smb_size; 5240266059SGregory Neil Shapiro return 0; 5340266059SGregory Neil Shapiro } 54