2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #if defined(LIBC_SCCS) && !defined(lint)
36 static char sccsid[] = "@(#)stdio.c 8.1 (Berkeley) 6/4/93";
37 #endif /* LIBC_SCCS and not lint */
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include "namespace.h"
48 #include "un-namespace.h"
52 * Small standard I/O/seek/close functions.
55 __sread(void *cookie, char *buf, int n)
59 return(_read(fp->_file, buf, (size_t)n));
63 __swrite(void *cookie, char const *buf, int n)
67 return (_write(fp->_file, buf, (size_t)n));
71 __sseek(void *cookie, fpos_t offset, int whence)
75 return (lseek(fp->_file, (off_t)offset, whence));
79 __sclose(void *cookie)
82 return (_close(((FILE *)cookie)->_file));
86 * Higher level wrappers.
89 _sread(FILE *fp, char *buf, int n)
93 ret = (*fp->_read)(fp->_cookie, buf, n);
95 if (fp->_flags & __SOFF) {
96 if (fp->_offset <= OFF_MAX - ret)
99 fp->_flags &= ~__SOFF;
102 fp->_flags &= ~__SOFF;
107 _swrite(FILE *fp, char const *buf, int n)
112 if (fp->_flags & __SAPP) {
114 if (_sseek(fp, (fpos_t)0, SEEK_END) == -1 &&
115 (fp->_flags & __SOPT))
119 ret = (*fp->_write)(fp->_cookie, buf, n);
120 /* __SOFF removed even on success in case O_APPEND mode is set. */
122 if ((fp->_flags & __SOFF) && !(fp->_flags2 & __S2OAP) &&
123 fp->_offset <= OFF_MAX - ret)
126 fp->_flags &= ~__SOFF;
129 fp->_flags &= ~__SOFF;
134 _sseek(FILE *fp, fpos_t offset, int whence)
141 ret = (*fp->_seek)(fp->_cookie, offset, whence);
146 * Disallow negative seeks per POSIX.
147 * It is needed here to help upper level caller
148 * in the cases it can't detect.
152 if (offset != 0 || whence != SEEK_CUR) {
155 fp->_p = fp->_bf._base;
157 fp->_flags &= ~__SEOF;
159 fp->_flags |= __SERR;
161 } else if (errret == ESPIPE)
162 fp->_flags &= ~__SAPP;
163 fp->_flags &= ~__SOFF;
165 } else if (fp->_flags & __SOPT) {
166 fp->_flags |= __SOFF;
173 __stdio_cancel_cleanup(void * arg)
177 _funlockfile((FILE *)arg);