Line data    Source code

       1             : /* Which POSIX version to conform to, for utilities.
       2             : 
       3             :    Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software
       4             :    Foundation, Inc.
       5             : 
       6             :    This program is free software: you can redistribute it and/or modify
       7             :    it under the terms of the GNU General Public License as published by
       8             :    the Free Software Foundation; either version 3 of the License, or
       9             :    (at your option) any later version.
      10             : 
      11             :    This program is distributed in the hope that it will be useful,
      12             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             :    GNU General Public License for more details.
      15             : 
      16             :    You should have received a copy of the GNU General Public License
      17             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      18             : 
      19             : /* Written by Paul Eggert.  */
      20             : 
      21             : #include <config.h>
      22             : 
      23             : #include "posixver.h"
      24             : 
      25             : #include <limits.h>
      26             : #include <stdlib.h>
      27             : 
      28             : #include <unistd.h>
      29             : #ifndef _POSIX2_VERSION
      30             : # define _POSIX2_VERSION 0
      31             : #endif
      32             : 
      33             : #ifndef DEFAULT_POSIX2_VERSION
      34             : # define DEFAULT_POSIX2_VERSION _POSIX2_VERSION
      35             : #endif
      36             : 
      37             : /* The POSIX version that utilities should conform to.  The default is
      38             :    specified by the system.  */
      39             : 
      40             : int
      41         158 : posix2_version (void)
      42             : {
      43         158 :   long int v = DEFAULT_POSIX2_VERSION;
      44         158 :   char const *s = getenv ("_POSIX2_VERSION");
      45             : 
      46         158 :   if (s && *s)
      47             :     {
      48             :       char *e;
      49           0 :       long int i = strtol (s, &e, 10);
      50           0 :       if (! *e)
      51           0 :         v = i;
      52             :     }
      53             : 
      54         158 :   return v < INT_MIN ? INT_MIN : v < INT_MAX ? v : INT_MAX;
      55             : }