libexplain: libexplain/ac/unistd.h Source File

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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2008, 2009, 2011, 2013 Peter Miller
00004  * Written by Peter Miller <pmiller@opensource.org.au>
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU Lesser General Public License as published by
00008  * the Free Software Foundation; either version 3 of the License, or (at
00009  * your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public License
00017  * along with this program. If not, see <http://www.gnu.org/licenses/>.
00018  */
00019 
00020 #ifndef LIBEXPLAIN_AC_UNISTD_H
00021 #define LIBEXPLAIN_AC_UNISTD_H
00022 
00028 #include <libexplain/config.h>
00029 
00030 /*
00031  * Need to define _BSD_SOURCE on Linux to get prototypes for the symlink
00032  * and readlink functions.
00033  */
00034 #ifdef __linux__
00035 #ifndef _BSD_SOURCE
00036 #define _BSD_SOURCE 1
00037 #endif
00038 #ifndef __USE_BSD
00039 #define __USE_BSD 1
00040 #endif
00041 #endif
00042 
00043 #ifdef HAVE_UNISTD_H
00044 #include <libexplain/ac/linux/types.h> /* Ubuntu Hardy needs this first */
00045 #include <libexplain/ac/sys/types.h>
00046 #include <unistd.h>
00047 #endif
00048 
00049 #ifndef SEEK_SET
00050 #define SEEK_SET 0
00051 #endif
00052 #ifndef F_OK
00053 #define F_OK 0
00054 #endif
00055 
00056 /*
00057  * This is supposed to be declared in <unistd.h> by modern POSIX
00058  * impelementations.  Sadly, some systems in common use get this wrong.
00059  */
00060 extern char **environ;
00061 
00062 #endif /* LIBEXPLAIN_AC_UNISTD_H */
00063 /* vim: set ts=8 sw=4 et : */