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. 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.
19 *
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
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)wsetup.c 8.1 (Berkeley) 6/4/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
| 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. 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.
19 *
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
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)wsetup.c 8.1 (Berkeley) 6/4/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
|
38
39#include <errno.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include "local.h"
43
44/*
45 * Various output routines call wsetup to be sure it is safe to write,
46 * because either _flags does not include __SWR, or _buf is NULL.
47 * _wsetup returns 0 if OK to write; otherwise, it returns EOF and sets errno.
48 */
49int
| 38
39#include <errno.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include "local.h"
43
44/*
45 * Various output routines call wsetup to be sure it is safe to write,
46 * because either _flags does not include __SWR, or _buf is NULL.
47 * _wsetup returns 0 if OK to write; otherwise, it returns EOF and sets errno.
48 */
49int
|
52{
53 /* make sure stdio is set up */
54 if (!__sdidinit)
55 __sinit();
56
57 /*
58 * If we are not writing, we had better be reading and writing.
59 */
60 if ((fp->_flags & __SWR) == 0) {
61 if ((fp->_flags & __SRW) == 0) {
62 errno = EBADF;
63 fp->_flags |= __SERR;
64 return (EOF);
65 }
66 if (fp->_flags & __SRD) {
67 /* clobber any ungetc data */
68 if (HASUB(fp))
69 FREEUB(fp);
70 fp->_flags &= ~(__SRD|__SEOF);
71 fp->_r = 0;
72 fp->_p = fp->_bf._base;
73 }
74 fp->_flags |= __SWR;
75 }
76
77 /*
78 * Make a buffer if necessary, then set _w.
79 */
80 if (fp->_bf._base == NULL)
81 __smakebuf(fp);
82 if (fp->_flags & __SLBF) {
83 /*
84 * It is line buffered, so make _lbfsize be -_bufsize
85 * for the putc() macro. We will change _lbfsize back
86 * to 0 whenever we turn off __SWR.
87 */
88 fp->_w = 0;
89 fp->_lbfsize = -fp->_bf._size;
90 } else
91 fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size;
92 return (0);
93}
| 51{
52 /* make sure stdio is set up */
53 if (!__sdidinit)
54 __sinit();
55
56 /*
57 * If we are not writing, we had better be reading and writing.
58 */
59 if ((fp->_flags & __SWR) == 0) {
60 if ((fp->_flags & __SRW) == 0) {
61 errno = EBADF;
62 fp->_flags |= __SERR;
63 return (EOF);
64 }
65 if (fp->_flags & __SRD) {
66 /* clobber any ungetc data */
67 if (HASUB(fp))
68 FREEUB(fp);
69 fp->_flags &= ~(__SRD|__SEOF);
70 fp->_r = 0;
71 fp->_p = fp->_bf._base;
72 }
73 fp->_flags |= __SWR;
74 }
75
76 /*
77 * Make a buffer if necessary, then set _w.
78 */
79 if (fp->_bf._base == NULL)
80 __smakebuf(fp);
81 if (fp->_flags & __SLBF) {
82 /*
83 * It is line buffered, so make _lbfsize be -_bufsize
84 * for the putc() macro. We will change _lbfsize back
85 * to 0 whenever we turn off __SWR.
86 */
87 fp->_w = 0;
88 fp->_lbfsize = -fp->_bf._size;
89 } else
90 fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size;
91 return (0);
92}
|