1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32/*
33 *	This routine is a special case, in that it is aware of
34 *	both small and large file interfaces. It must be built
35 *	in the small compilation environment.
36 */
37
38#include "lint.h"
39#include "file64.h"
40#include <mtlib.h>
41#include <sys/types.h>
42#include <stdio.h>
43#include <fcntl.h>
44#include <unistd.h>
45#include <limits.h>
46#include <thread.h>
47#include <synch.h>
48#include "stdiom.h"
49#include <errno.h>
50
51/*
52 * open UNIX file name, associate with iop
53 */
54
55FILE *
56_endopen(const char *name, const char *type, FILE *iop, int largefile)
57{
58	int oflag, fd, fflag;
59	char plus;
60
61	if (iop == NULL)
62		return (NULL);
63	switch (type[0]) {
64	default:
65		errno = EINVAL;
66		return (NULL);
67	case 'r':
68		oflag = O_RDONLY;
69		fflag = _IOREAD;
70		break;
71	case 'w':
72		oflag = O_WRONLY | O_TRUNC | O_CREAT;
73		fflag = _IOWRT;
74		break;
75	case 'a':
76		oflag = O_WRONLY | O_APPEND | O_CREAT;
77		fflag = _IOWRT;
78		break;
79	}
80	/* UNIX ignores 'b' and treats text and binary the same */
81	if ((plus = type[1]) == 'b')
82		plus = type[2];
83	if (plus == '+') {
84		oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
85		fflag = _IORW;
86	}
87
88	/* select small or large file open based on flag */
89	if (largefile) {
90		fd = open64(name, oflag, 0666);
91	} else {
92		fd = open(name, oflag, 0666);
93	}
94	if (fd < 0)
95		return (NULL);
96
97	/* As long as we make sure _flag stays != 0, we don't need to lock */
98#ifdef	_LP64
99	iop->_file = fd;
100	iop->_flag = (iop->_flag & ~0377) | fflag;
101#else
102	if (fd <= _FILE_FD_MAX) {
103		SET_FILE(iop, fd);
104	} else if (_file_set(iop, fd, type) != 0) {
105		/* errno set in _file_set() */
106		(void) close(fd);
107		return (NULL);
108	}
109	iop->_flag = fflag;
110#endif	/*	_LP64	*/
111
112	if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) {	/* type == "a" */
113		if (lseek64(fd, (off64_t)0, SEEK_END) < (off64_t)0) {
114			(void) close(fd);
115			return (NULL);
116		}
117	}
118
119	return (iop);
120}
121