11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* $OpenBSD: fdopen.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 <sys/types.h> 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <fcntl.h> 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <unistd.h> 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdio.h> 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include "local.h" 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source ProjectFILE * 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectfdopen(int fd, const char *mode) 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project FILE *fp; 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int flags, oflags, fdflags, tmp; 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((flags = __sflags(mode, &oflags)) == 0) 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* Make sure the mode the user wants is a subset of the actual mode. */ 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((fdflags = fcntl(fd, F_GETFL, 0)) < 0) 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project tmp = fdflags & O_ACCMODE; 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (tmp != O_RDWR && (tmp != (oflags & O_ACCMODE))) { 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = EINVAL; 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((fp = __sfp()) == NULL) 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_flags = flags; 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * If opened for appending, but underlying descriptor does not have 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * O_APPEND bit set, assert __SAPP so that __swrite() will lseek to 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * end before each write. 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((oflags & O_APPEND) && !(fdflags & O_APPEND)) 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_flags |= __SAPP; 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_file = fd; 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_cookie = fp; 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_read = __sread; 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_write = __swrite; 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_seek = __sseek; 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fp->_close = __sclose; 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (fp); 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 77