fcntl and vs2008

[dancvogel]

Currently porting code written with vs6 to vs2008, and running in to problems with fcntl (among others).

with fcntl.h included I am getting errors such as:

error C2027: use of undefined type 'main::flock'
error C2065: 'F_RDLCK' : undeclared identifier

So I looked at the fcntl.h file and the flock structure is not defined, F_RDLCK isn't either.

Why is this? Is fcntl outdated and should not be use? What should I use instead? Where can I find a copy of fcntl.h that has what I need?

[S_M_A]

Hm, don't have 2008 but are you sure it fcntl.h that causes this? Try declaring what you need yourself instead and comment the fcntl include (just to get the file to compile).

[dancvogel]

I've done as you suggested and declared the flock structure myself and have commented out the fcntl include. With this, I no longer get the:

error C2027: use of undefined type 'main::flock'

This still leads me to believe that there is something wrong with the copy of fcntl.h i have.

the fcntl.h file found in C:\Program Files\Microsoft Visual Studio 9.0\VC\include reads as follows:

/***
*fcntl.h - file control options used by open()
*
* Copyright (c) Microsoft Corporation. All rights reserved.
*
*Purpose:
* This file defines constants for the file control options used
* by the _open() function.
* [System V]
*
* [Public]
*
****/

#if _MSC_VER > 1000
#pragma once
#endif

#include <crtdefs.h>

#ifndef _INC_FCNTL
#define _INC_FCNTL


#define _O_RDONLY 0x0000 /* open for reading only */
#define _O_WRONLY 0x0001 /* open for writing only */
#define _O_RDWR 0x0002 /* open for reading and writing */
#define _O_APPEND 0x0008 /* writes done at eof */

#define _O_CREAT 0x0100 /* create and open file */
#define _O_TRUNC 0x0200 /* open and truncate */
#define _O_EXCL 0x0400 /* open only if file doesn't already exist */

/* O_TEXT files have <cr><lf> sequences translated to <lf> on read()'s,
** and <lf> sequences translated to <cr><lf> on write()'s
*/

#define _O_TEXT 0x4000 /* file mode is text (translated) */
#define _O_BINARY 0x8000 /* file mode is binary (untranslated) */
#define _O_WTEXT 0x10000 /* file mode is UTF16 (translated) */
#define _O_U16TEXT 0x20000 /* file mode is UTF16 no BOM (translated) */
#define _O_U8TEXT 0x40000 /* file mode is UTF8 no BOM (translated) */

/* macro to translate the C 2.0 name used to force binary mode for files */

#define _O_RAW _O_BINARY

/* Open handle inherit bit */

#define _O_NOINHERIT 0x0080 /* child process doesn't inherit file */

/* Temporary file bit - file is deleted when last handle is closed */

#define _O_TEMPORARY 0x0040 /* temporary file bit */

/* temporary access hint */

#define _O_SHORT_LIVED 0x1000 /* temporary storage file, try not to flush */

/* sequential/random access hints */

#define _O_SEQUENTIAL 0x0020 /* file access is primarily sequential */
#define _O_RANDOM 0x0010 /* file access is primarily random */

#if !__STDC__ || defined(_POSIX_)
/* Non-ANSI names for compatibility */
#define O_RDONLY _O_RDONLY
#define O_WRONLY _O_WRONLY
#define O_RDWR _O_RDWR
#define O_APPEND _O_APPEND
#define O_CREAT _O_CREAT
#define O_TRUNC _O_TRUNC
#define O_EXCL _O_EXCL
#define O_TEXT _O_TEXT
#define O_BINARY _O_BINARY
#define O_RAW _O_BINARY
#define O_TEMPORARY _O_TEMPORARY
#define O_NOINHERIT _O_NOINHERIT
#define O_SEQUENTIAL _O_SEQUENTIAL
#define O_RANDOM _O_RANDOM
#endif /* __STDC__ */

#endif /* _INC_FCNTL */



Clearly there is a lot missing in this file.

Is fcntl not part of c++ standard and thus only a reduced version is used with vs2008?