fcntl.h

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/* @(#)fcntl.h  1.19 11/10/19 Copyright 1996-2011 J. Schilling */
/*
 *  Generic header for users of open(), creat() and chmod()
 *
 *  Copyright (c) 1996-2011 J. Schilling
 */
/*
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * See the file CDDL.Schily.txt in this distribution for details.
 * A copy of the CDDL is also available via the Internet at
 * http://www.opensource.org/licenses/cddl1.txt
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file CDDL.Schily.txt from this distribution.
 */
 
#ifndef _SCHILY_FCNTL_H
#define _SCHILY_FCNTL_H
 
#ifndef _SCHILY_MCONFIG_H
#include <schily/mconfig.h>
#endif
 
#ifndef _SCHILY_TYPES_H
#include <schily/types.h>   /* Needed for fcntl.h           */
#endif
 
#ifndef _SCHILY_STAT_H
#include <schily/stat.h>    /* For 3rd arg of open() and chmod()    */
#endif
 
#ifdef  HAVE_SYS_FILE_H
/*
 * Historical systems with flock() only need sys/file.h
 */
#   ifndef  _INCL_SYS_FILE_H
#   include <sys/file.h>
#   define  _INCL_SYS_FILE_H
#   endif
#endif
#ifdef  HAVE_FCNTL_H
#   ifndef  _INCL_FCNTL_H
#   include <fcntl.h>
#   define  _INCL_FCNTL_H
#endif
#endif
 
/*
 * Do not define more than O_RDONLY / O_WRONLY / O_RDWR / O_BINARY
 * The values may differ.
 *
 * O_BINARY is defined here to allow all applications to compile on a non DOS
 * environment without repeating this definition.
 * O_SEARCH, O_DIRECTORY and NOFOLLOW are defined here to allow to compile on
 * older platforms.
 * open(name, O_SEARCH) is like UNOS open(name, "") (open neither for read nor
 * for write). This allows to call fstat() and to get an fd for openat(fd, ...)
 */
#ifndef O_RDONLY
#   define  O_RDONLY    0
#endif
#ifndef O_WRONLY
#   define  O_WRONLY    1
#endif
#ifndef O_RDWR
#   define  O_RDWR      2
#endif
#ifndef O_BINARY            /* Only present on DOS or similar */
#   define  O_BINARY    0
#endif
#ifndef O_NDELAY            /* This is undefined on BeOS :-( */
#   define  O_NDELAY    0
#endif
#ifndef O_EXEC              /* Open for exec only (non-directory) */
#   define  O_EXEC      O_RDONLY
#endif
#ifndef O_SEARCH            /* Open for search only. */
#   define  O_SEARCH    O_RDONLY
#endif
#ifndef O_DIRECTORY         /* Fail if not a directory */
#   define  O_DIRECTORY 0
#endif
#ifndef O_NOFOLLOW          /* Fail if a symlink */
#   define  O_NOFOLLOW  0
#endif
 
#ifndef O_ACCMODE
#define O_ACCMODE       (O_RDONLY|O_WRONLY|O_RDWR|O_EXEC|O_SEARCH)
#endif
 
#ifdef  O_NOATIME           /* Allow #ifdef O_NOATIME */
#define _O_NOATIME      O_NOATIME
#else
#define _O_NOATIME      0
#endif
 
#ifndef FD_CLOEXEC
#define FD_CLOEXEC      1   /* close on exec flag */
#endif
 
/*
 * The following definitions are used for emulating the *at() functions.
 * We use higher numbers for our definitions, to allow to add emulations
 * for missing functions without causing a clash with system definitions.
 */
#ifndef HAVE_OPENAT
#ifndef AT_FDCWD
#define AT_FDCWD        0xffd19553 /* *at() to working dir */
#endif
#endif
#ifndef HAVE_FSTATAT
#ifndef AT_SYMLINK_NOFOLLOW
#define AT_SYMLINK_NOFOLLOW 0x10000 /* emulate lstat() */
#endif
#endif
#ifndef HAVE_UNLINKAT
#ifndef AT_REMOVEDIR
#define AT_REMOVEDIR        0x20000 /* emulate rmdir() */
#endif
#endif
#ifndef HAVE_FACCESSAT
#ifndef AT_EACCESS
#define AT_EACCESS      0x40000 /* EUID access() */
#endif
#endif
#ifndef HAVE_LINKAT
#ifndef AT_SYMLINK_FOLLOW
#define AT_SYMLINK_FOLLOW   0x80000 /* follow symlinks before link() */
#endif
#endif
 
#endif  /* _SCHILY_FCNTL_H */