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. 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.
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
37 #if defined(LIBC_SCCS) && !defined(lint)
38 static char sccsid[] = "@(#)stdio.c 8.1 (Berkeley) 6/4/93";
39 #endif /* LIBC_SCCS and not lint */
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
43 #include "namespace.h"
49 #include "un-namespace.h"
53 * Small standard I/O/seek/close functions.
56 __sread(cookie, buf, n)
63 return(_read(fp->_file, buf, (size_t)n));
67 __swrite(cookie, buf, n)
74 return (_write(fp->_file, buf, (size_t)n));
78 __sseek(cookie, offset, whence)
85 return (lseek(fp->_file, (off_t)offset, whence));
93 return (_close(((FILE *)cookie)->_file));
97 * Higher level wrappers.
107 ret = (*fp->_read)(fp->_cookie, buf, n);
109 if (fp->_flags & __SOFF) {
110 if (fp->_offset <= OFF_MAX - ret)
113 fp->_flags &= ~__SOFF;
116 fp->_flags &= ~__SOFF;
129 if (fp->_flags & __SAPP) {
131 if (_sseek(fp, (fpos_t)0, SEEK_END) == -1 &&
132 (fp->_flags & __SOPT))
136 ret = (*fp->_write)(fp->_cookie, buf, n);
137 /* __SOFF removed even on success in case O_APPEND mode is set. */
139 if ((fp->_flags & (__SAPP|__SOFF)) == (__SAPP|__SOFF) &&
140 fp->_offset <= OFF_MAX - ret)
143 fp->_flags &= ~__SOFF;
146 fp->_flags &= ~__SOFF;
151 _sseek(fp, offset, whence)
161 ret = (*fp->_seek)(fp->_cookie, offset, whence);
166 * Disallow negative seeks per POSIX.
167 * It is needed here to help upper level caller
168 * in the cases it can't detect.
172 if (offset != 0 || whence != SEEK_CUR) {
175 fp->_p = fp->_bf._base;
177 fp->_flags &= ~__SEOF;
179 fp->_flags |= __SERR;
181 } else if (errret == ESPIPE)
182 fp->_flags &= ~__SAPP;
183 fp->_flags &= ~__SOFF;
185 } else if (fp->_flags & __SOPT) {
186 fp->_flags |= __SOFF;