Subversion Repositories shark

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 pj 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
static char sccsid[] = "@(#)funopen.c   8.1 (Berkeley) 6/4/93";
39
#endif /* LIBC_SCCS and not lint */
40
 
41
#include <stdio.h>
42
#include <errno.h>
43
#include "local.h"
44
 
45
FILE *
46
funopen(cookie, readfn, writefn, seekfn, closefn)
47
        const void *cookie;
48
        int (*readfn)(), (*writefn)();
49
#if __STDC__
50
        fpos_t (*seekfn)(void *cookie, fpos_t off, int whence);
51
#else
52
        fpos_t (*seekfn)();
53
#endif
54
        int (*closefn)();
55
{
56
        register FILE *fp;
57
        int flags;
58
 
59
        if (readfn == NULL) {
60
                if (writefn == NULL) {          /* illegal */
61
                        errno = EINVAL;
62
                        return (NULL);
63
                } else
64
                        flags = __SWR;          /* write only */
65
        } else {
66
                if (writefn == NULL)
67
                        flags = __SRD;          /* read only */
68
                else
69
                        flags = __SRW;          /* read-write */
70
        }
71
        if ((fp = __sfp()) == NULL)
72
                return (NULL);
73
        fp->_flags = flags;
74
        fp->_file = -1;
75
        fp->_cookie = (void *)cookie;
76
        fp->_read = readfn;
77
        fp->_write = writefn;
78
        fp->_seek = seekfn;
79
        fp->_close = closefn;
80
        return (fp);
81
}