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