| /* Which POSIX version to conform to, for utilities. |
| |
| Copyright (C) 2002-2006, 2009-2020 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; |
| } |