11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* $OpenBSD: fflush.c,v 1.5 2005/08/08 08:05:36 espie Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*- 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 1990, 1993 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * The Regents of the University of California. All rights reserved. 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * This code is derived from software contributed to Berkeley by 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Chris Torek. 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 3. Neither the name of the University nor the names of its contributors 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * may be used to endorse or promote products derived from this software 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * without specific prior written permission. 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdio.h> 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "local.h" 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* Flush a single file, or (if fp is NULL) all files. */ 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectfflush(FILE *fp) 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (fp == NULL) 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (_fwalk(__sflush)); 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((fp->_flags & (__SWR | __SRW)) == 0) { 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = EBADF; 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (EOF); 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (__sflush(fp)); 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project__sflush(FILE *fp) 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project unsigned char *p; 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int n, t; 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project t = fp->_flags; 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((t & __SWR) == 0) 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (0); 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((p = fp->_bf._base) == NULL) 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (0); 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project n = fp->_p - p; /* write this much */ 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Set these immediately to avoid problems with longjmp and to allow 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * exchange buffering (via setvbuf) in user write function. 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_p = p; 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_w = t & (__SLBF|__SNBF) ? 0 : fp->_bf._size; 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (; n > 0; n -= t, p += t) { 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project t = (*fp->_write)(fp->_cookie, (char *)p, n); 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (t <= 0) { 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_flags |= __SERR; 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (EOF); 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (0); 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 83