2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #if defined(LIBC_SCCS) && !defined(lint)
34 static char sccsid[] = "@(#)fopen.c 8.1 (Berkeley) 6/4/93";
35 #endif /* LIBC_SCCS and not lint */
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include "namespace.h"
40 #include <sys/types.h>
47 #include "un-namespace.h"
52 fopen(const char * __restrict file, const char * __restrict mode)
58 if ((flags = __sflags(mode, &oflags)) == 0)
60 if ((fp = __sfp()) == NULL)
62 if ((f = _open(file, oflags, DEFFILEMODE)) < 0) {
63 fp->_flags = 0; /* release */
67 * File descriptors are a full int, but _file is only a short.
68 * If we get a valid file descriptor that is greater than
69 * SHRT_MAX, then the fd will get sign-extended into an
70 * invalid file descriptor. Handle this case by failing the
74 fp->_flags = 0; /* release */
83 fp->_write = __swrite;
85 fp->_close = __sclose;
87 * When opening in append mode, even though we use O_APPEND,
88 * we need to seek to the end so that ftell() gets the right
89 * answer. If the user then alters the seek pointer, or
90 * the file extends, this will fail, but there is not much
91 * we can do about this. (We could set __SAPP and check in
94 if (oflags & O_APPEND) {
95 fp->_flags2 |= __S2OAP;
96 (void)_sseek(fp, (fpos_t)0, SEEK_END);