?? posixver.c
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/* Which POSIX version to conform to, for utilities. Copyright (C) 2002 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *//* Written by Paul Eggert. */#if HAVE_CONFIG_H# include <config.h>#endif#include <limits.h>#include <stdlib.h>#if !HAVE_DECL_GETENV && !defined getenvchar *getenv ();#endif#if HAVE_UNISTD_H# include <unistd.h>#endif#ifndef _POSIX2_VERSION# define _POSIX2_VERSION 0#endif/* The POSIX version that utilities should conform to. The default is specified by the system. */intposix2_version (void){ long int v = _POSIX2_VERSION; char const *s = getenv ("_POSIX2_VERSION"); if (s && *s) { char *e; long int i = strtol (s, &e, 10); if (! *e) v = i; } return v < INT_MIN ? INT_MIN : v < INT_MAX ? v : INT_MAX;}
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