/* 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 getenv char *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. */ int posix2_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; }