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[] = "@(#)stdio.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"
46 #include "un-namespace.h"
50 * Small standard I/O/seek/close functions.
53 __sread(void *cookie, char *buf, int n)
57 return(_read(fp->_file, buf, (size_t)n));
61 __swrite(void *cookie, char const *buf, int n)
65 return (_write(fp->_file, buf, (size_t)n));
69 __sseek(void *cookie, fpos_t offset, int whence)
73 return (lseek(fp->_file, (off_t)offset, whence));
77 __sclose(void *cookie)
80 return (_close(((FILE *)cookie)->_file));
84 * Higher level wrappers.
87 _sread(FILE *fp, char *buf, int n)
91 ret = (*fp->_read)(fp->_cookie, buf, n);
93 if (fp->_flags & __SOFF) {
94 if (fp->_offset <= OFF_MAX - ret)
97 fp->_flags &= ~__SOFF;
100 fp->_flags &= ~__SOFF;
105 _swrite(FILE *fp, char const *buf, int n)
110 if (fp->_flags & __SAPP) {
112 if (_sseek(fp, (fpos_t)0, SEEK_END) == -1 &&
113 (fp->_flags & __SOPT))
117 ret = (*fp->_write)(fp->_cookie, buf, n);
118 /* __SOFF removed even on success in case O_APPEND mode is set. */
120 if ((fp->_flags & __SOFF) && !(fp->_flags2 & __S2OAP) &&
121 fp->_offset <= OFF_MAX - ret)
124 fp->_flags &= ~__SOFF;
127 fp->_flags &= ~__SOFF;
132 _sseek(FILE *fp, fpos_t offset, int whence)
139 ret = (*fp->_seek)(fp->_cookie, offset, whence);
144 * Disallow negative seeks per POSIX.
145 * It is needed here to help upper level caller
146 * in the cases it can't detect.
150 if (offset != 0 || whence != SEEK_CUR) {
153 fp->_p = fp->_bf._base;
155 fp->_flags &= ~__SEOF;
157 fp->_flags |= __SERR;
159 } else if (errret == ESPIPE)
160 fp->_flags &= ~__SAPP;
161 fp->_flags &= ~__SOFF;
163 } else if (fp->_flags & __SOPT) {
164 fp->_flags |= __SOFF;