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
32 * @(#)stdio.c 8.1 (Berkeley) 6/4/93
33 * $FreeBSD: src/lib/libc/stdio/stdio.c,v 1.28 2008/05/05 16:14:02 jhb Exp $
36 #include "namespace.h"
43 #include "un-namespace.h"
47 * Small standard I/O/seek/close functions.
50 __sread(void *cookie, char *buf, int n)
54 return(_read(fp->pub._fileno, buf, (size_t)n));
58 __swrite(void *cookie, const char *buf, int n)
62 return (_write(fp->pub._fileno, buf, (size_t)n));
66 __sseek(void *cookie, fpos_t offset, int whence)
70 return (lseek(fp->pub._fileno, (off_t)offset, whence));
74 __sclose(void *cookie)
77 return (_close(((FILE *)cookie)->pub._fileno));
81 * Higher level wrappers.
84 _sread(FILE *fp, char *buf, int n)
88 ret = (*fp->_read)(fp->_cookie, buf, n);
90 if (fp->pub._flags & __SOFF) {
91 if (fp->_offset <= OFF_MAX - ret)
94 fp->pub._flags &= ~__SOFF;
97 fp->pub._flags &= ~__SOFF;
102 _swrite(FILE *fp, const char *buf, int n)
107 if (fp->pub._flags & __SAPP) {
109 if (_sseek(fp, (fpos_t)0, SEEK_END) == -1 &&
110 (fp->pub._flags & __SOPT))
114 ret = (*fp->_write)(fp->_cookie, buf, n);
115 /* __SOFF removed even on success in case O_APPEND mode is set. */
117 if ((fp->pub._flags & (__SAPP|__SOFF)) == (__SAPP|__SOFF) &&
118 fp->_offset <= OFF_MAX - ret)
121 fp->pub._flags &= ~__SOFF;
124 fp->pub._flags &= ~__SOFF;
129 _sseek(FILE *fp, fpos_t offset, int whence)
136 ret = (*fp->_seek)(fp->_cookie, offset, whence);
141 * Disallow negative seeks per POSIX.
142 * It is needed here to help upper level caller
143 * in the cases it can't detect.
147 if (offset != 0 || whence != SEEK_CUR) {
150 fp->pub._p = fp->_bf._base;
152 fp->pub._flags &= ~__SEOF;
154 fp->pub._flags |= __SERR;
156 } else if (errret == ESPIPE)
157 fp->pub._flags &= ~__SAPP;
158 fp->pub._flags &= ~__SOFF;
160 } else if (fp->pub._flags & __SOPT) {
161 fp->pub._flags |= __SOFF;