1/*-
2 * Copyright (c) 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <ktypes.h>
38//#include <sys/types.h>
39#include <sys/stat.h>
40#include <fcntl.h>
41#include <stdio.h>
42#include <errno.h>
43
44#include <errno_private.h>
45
46#include "local.h"
47
48FILE *
49fopen(file, mode)
50	const char *file;
51	const char *mode;
52{
53	register FILE *fp;
54	register int f;
55	int flags, oflags;
56
57	if ((flags = __sflags(mode, &oflags)) == 0) {
58		fprintf(stderr, "flags == 0\n");
59		return (NULL);
60	}
61	if ((fp = __sfp()) == NULL) {
62		fprintf(stderr, "__sfp == NULL()\n");
63		return (NULL);
64	}
65	if ((f = open(file, oflags, DEFFILEMODE)) < 0) {
66		fp->_flags = 0;			/* release */
67/* XXX - temporary hack */
68		__set_errno(f);
69		return (NULL);
70	}
71	fp->_file = f;
72	fp->_flags = flags;
73	fp->_cookie = fp;
74	fp->_read = __sread;
75	fp->_write = __swrite;
76	fp->_seek = __sseek;
77	fp->_close = __sclose;
78
79	/*
80	 * When opening in append mode, even though we use O_APPEND,
81	 * we need to seek to the end so that ftell() gets the right
82	 * answer.  If the user then alters the seek pointer, or
83	 * the file extends, this will fail, but there is not much
84	 * we can do about this.  (We could set __SAPP and check in
85	 * fseek and ftell.)
86	 */
87	if (oflags & O_APPEND)
88		(void) __sseek((void *)fp, (fpos_t)0, SEEK_END);
89	return (fp);
90}
91