1 /** @file
2
3 Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
4 This program and the accompanying materials are licensed and made available under
5 the terms and conditions of the BSD License that accompanies this distribution.
6 The full text of the license may be found at
7 http://opensource.org/licenses/bsd-license.
8
9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
11
12 * Copyright (c) 1990, 1993
13 * The Regents of the University of California. All rights reserved.
14 *
15 * This code is derived from software contributed to Berkeley by
16 * Chris Torek.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * SUCH DAMAGE.
41
42 NetBSD: fdopen.c,v 1.14 2003/08/07 16:43:22 agc Exp
43 fdopen.c 8.1 (Berkeley) 6/4/93
44 **/
45 #include <LibConfig.h>
46 #include <sys/EfiCdefs.h>
47
48 #include "namespace.h"
49 #include <sys/types.h>
50
51 #include <assert.h>
52 #include <errno.h>
53 #include <fcntl.h>
54 #include <stdio.h>
55 #include <unistd.h>
56
57 #include "reentrant.h"
58 #include "local.h"
59
60 #ifdef __weak_alias
__weak_alias(fdopen,_fdopen)61 __weak_alias(fdopen,_fdopen)
62 #endif
63
64 FILE *
65 fdopen(int fd, const char *mode)
66 {
67 FILE *fp;
68 int flags, oflags, fdflags, tmp;
69
70 _DIAGASSERT(fd != -1);
71
72 if ((flags = __sflags(mode, &oflags)) == 0)
73 return (NULL);
74
75 /* Make sure the mode the user wants is a subset of the actual mode. */
76 if ((fdflags = fcntl(fd, F_GETFL, 0)) < 0)
77 return (NULL);
78 tmp = fdflags & O_ACCMODE;
79 if (tmp != O_RDWR && (tmp != (oflags & O_ACCMODE))) {
80 errno = EINVAL;
81 return (NULL);
82 }
83
84 if (oflags & O_NONBLOCK) {
85 struct stat st;
86 if (fstat(fd, &st) == -1) {
87 return (NULL);
88 }
89 if (!S_ISREG(st.st_mode)) {
90 errno = EFTYPE;
91 return (NULL);
92 }
93 }
94
95 if ((fp = __sfp()) == NULL)
96 return (NULL);
97 fp->_flags = (unsigned short)flags;
98 /*
99 * If opened for appending, but underlying descriptor does not have
100 * O_APPEND bit set, assert __SAPP so that __swrite() will lseek to
101 * end before each write.
102 */
103 if ((oflags & O_APPEND) && !(fdflags & O_APPEND))
104 fp->_flags |= __SAPP;
105 fp->_file = (short)fd;
106 fp->_cookie = fp;
107 fp->_read = __sread;
108 fp->_write = __swrite;
109 fp->_seek = __sseek;
110 fp->_close = __sclose;
111 return (fp);
112 }
113