1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
35 */
36
37#if defined(LIBC_SCCS) && !defined(lint)
38#if 0
39static char sccsid[] = "@(#)stdio.c 8.1 (Berkeley) 6/4/93";
40#endif
41static const char rcsid[] =
| 1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
35 */
36
37#if defined(LIBC_SCCS) && !defined(lint)
38#if 0
39static char sccsid[] = "@(#)stdio.c 8.1 (Berkeley) 6/4/93";
40#endif
41static const char rcsid[] =
|
42 "$FreeBSD: head/lib/libc/stdio/stdio.c 71579 2001-01-24 13:01:12Z deischen $";
| 42 "$FreeBSD: head/lib/libc/stdio/stdio.c 81666 2001-08-15 02:07:47Z ache $";
|
43#endif /* LIBC_SCCS and not lint */
44
45#include "namespace.h"
| 43#endif /* LIBC_SCCS and not lint */
44
45#include "namespace.h"
|
| 46#include <errno.h>
|
46#include <fcntl.h>
47#include <unistd.h>
48#include <stdio.h>
49#include "un-namespace.h"
50#include "local.h"
51
52/*
53 * Small standard I/O/seek/close functions.
54 * These maintain the `known seek offset' for seek optimisation.
55 */
56int
57__sread(cookie, buf, n)
58 void *cookie;
59 char *buf;
60 int n;
61{
62 register FILE *fp = cookie;
63 register int ret;
64
65 ret = _read(fp->_file, buf, (size_t)n);
66 /* if the read succeeded, update the current offset */
67 if (ret >= 0)
68 fp->_offset += ret;
69 else
70 fp->_flags &= ~__SOFF; /* paranoia */
71 return (ret);
72}
73
74int
75__swrite(cookie, buf, n)
76 void *cookie;
77 char const *buf;
78 int n;
79{
80 register FILE *fp = cookie;
81
82 if (fp->_flags & __SAPP)
83 (void) lseek(fp->_file, (off_t)0, SEEK_END);
84 fp->_flags &= ~__SOFF; /* in case FAPPEND mode is set */
85 return (_write(fp->_file, buf, (size_t)n));
86}
87
88fpos_t
89__sseek(cookie, offset, whence)
90 void *cookie;
91 fpos_t offset;
92 int whence;
93{
94 register FILE *fp = cookie;
95 register off_t ret;
96
| 47#include <fcntl.h>
48#include <unistd.h>
49#include <stdio.h>
50#include "un-namespace.h"
51#include "local.h"
52
53/*
54 * Small standard I/O/seek/close functions.
55 * These maintain the `known seek offset' for seek optimisation.
56 */
57int
58__sread(cookie, buf, n)
59 void *cookie;
60 char *buf;
61 int n;
62{
63 register FILE *fp = cookie;
64 register int ret;
65
66 ret = _read(fp->_file, buf, (size_t)n);
67 /* if the read succeeded, update the current offset */
68 if (ret >= 0)
69 fp->_offset += ret;
70 else
71 fp->_flags &= ~__SOFF; /* paranoia */
72 return (ret);
73}
74
75int
76__swrite(cookie, buf, n)
77 void *cookie;
78 char const *buf;
79 int n;
80{
81 register FILE *fp = cookie;
82
83 if (fp->_flags & __SAPP)
84 (void) lseek(fp->_file, (off_t)0, SEEK_END);
85 fp->_flags &= ~__SOFF; /* in case FAPPEND mode is set */
86 return (_write(fp->_file, buf, (size_t)n));
87}
88
89fpos_t
90__sseek(cookie, offset, whence)
91 void *cookie;
92 fpos_t offset;
93 int whence;
94{
95 register FILE *fp = cookie;
96 register off_t ret;
97
|
| 98 /*
99 * Disallow negative seeks per POSIX.
100 * It is needed here to help upper level caller
101 * (fseek) in the cases it can't detect.
102 */
103 if (whence == SEEK_SET && (off_t)offset < 0) {
104 errno = EINVAL;
105 return (-1);
106 }
|
97 ret = lseek(fp->_file, (off_t)offset, whence);
| 107 ret = lseek(fp->_file, (off_t)offset, whence);
|
98 if (ret == -1)
| 108 if (ret < 0) {
109 if (ret != -1) {
110 /* Resulting seek is negative! */
111 ret = -1;
112 errno = EINVAL;
113 }
|
99 fp->_flags &= ~__SOFF;
| 114 fp->_flags &= ~__SOFF;
|
100 else {
| 115 } else {
|
101 fp->_flags |= __SOFF;
102 fp->_offset = ret;
103 }
104 return (ret);
105}
106
107int
108__sclose(cookie)
109 void *cookie;
110{
111
112 return (_close(((FILE *)cookie)->_file));
113}
| 116 fp->_flags |= __SOFF;
117 fp->_offset = ret;
118 }
119 return (ret);
120}
121
122int
123__sclose(cookie)
124 void *cookie;
125{
126
127 return (_close(((FILE *)cookie)->_file));
128}
|