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/* Which POSIX version to conform to, for utilities.
Copyright (C) 2002-2006, 2009-2021 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Paul Eggert. */
#include <config.h>
#include "posixver.h"
#include <limits.h>
#include <stdlib.h>
#include <unistd.h>
#ifndef _POSIX2_VERSION
# define _POSIX2_VERSION 0
#endif
#ifndef DEFAULT_POSIX2_VERSION
# define DEFAULT_POSIX2_VERSION _POSIX2_VERSION
#endif
/* The POSIX version that utilities should conform to. The default is
specified by the system. */
int
posix2_version (void)
{
long int v = DEFAULT_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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