/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

/* Copyright (c) 2013 OmniTI Computer Consulting, Inc. All rights reserved. */

/*
 *      This routine is a special case, in that it is aware of
 *      both small and large file interfaces. It must be built
 *      in the small compilation environment.
 */

#include "lint.h"
#include "file64.h"
#include <mtlib.h>
#include <sys/types.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
#include <thread.h>
#include <synch.h>
#include "stdiom.h"
#include <errno.h>

/*
 * open UNIX file name, associate with iop
 */

FILE *
_endopen(const char *name, const char *type, FILE *iop, int largefile)
{
        int oflag, fd, fflag;

        if (iop == NULL)
                return (NULL);

        if (_stdio_flags(type, &oflag, &fflag) != 0) {
                return (NULL);
        }

        /* select small or large file open based on flag */
        if (largefile) {
                fd = open64(name, oflag, 0666);
        } else {
                fd = open(name, oflag, 0666);
        }
        if (fd < 0)
                return (NULL);

        /* As long as we make sure _flag stays != 0, we don't need to lock */
#ifdef  _LP64
        iop->_file = fd;
        iop->_flag = (iop->_flag & ~_DEF_FLAG_MASK) | fflag;
#else
        if (fd <= _FILE_FD_MAX) {
                SET_FILE(iop, fd);
        } else if (_file_set(iop, fd, type) != 0) {
                /* errno set in _file_set() */
                int err = errno;
                (void) close(fd);
                errno = err;
                return (NULL);
        }
        iop->_flag = fflag;
#endif  /*      _LP64   */

        if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) { /* type == "a" */
                if (_xseek64(iop, (off64_t)0, SEEK_END) < (off64_t)0) {
                        (void) _xclose(iop);
                        return (NULL);
                }
        }

        return (iop);
}