fdopen.c - vx32 - Local 9vx git repository for patches.
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---
fdopen.c (3091B)
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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 rcsid[] = "$OpenBSD: fdopen.c,v 1.2 1996/08/19 08:32:20 tholo Exp $";
39 #endif /* LIBC_SCCS and not lint */
40
41 #include <sys/types.h>
42 #include <fcntl.h>
43 #include <unistd.h>
44 #include <stdio.h>
45 #include <errno.h>
46 #include "local.h"
47
48 FILE *
49 fdopen(fd, mode)
50 int fd;
51 const char *mode;
52 {
53 register FILE *fp;
54 int flags, oflags, fdflags, tmp;
55
56 if ((flags = __sflags(mode, &oflags)) == 0)
57 return (NULL);
58
59 /* Make sure the mode the user wants is a subset of the actual mode. */
60 /*
61 if ((fdflags = fcntl(fd, F_GETFL, 0)) < 0)
62 return (NULL);
63 tmp = fdflags & O_ACCMODE;
64 if (tmp != O_RDWR && (tmp != (oflags & O_ACCMODE))) {
65 errno = EINVAL;
66 return (NULL);
67 }
68 */
69
70 if ((fp = __sfp()) == NULL)
71 return (NULL);
72 fp->_flags = flags;
73 /*
74 * If opened for appending, but underlying descriptor does not have
75 * O_APPEND bit set, assert __SAPP so that __swrite() will lseek to
76 * end before each write.
77 */
78 if ((oflags & O_APPEND) && !(fdflags & O_APPEND))
79 fp->_flags |= __SAPP;
80 fp->_file = fd;
81 fp->_cookie = fp;
82 fp->_read = __sread;
83 fp->_write = __swrite;
84 fp->_seek = __sseek;
85 fp->_close = __sclose;
86 return (fp);
87 }