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1 /* Which POSIX version to conform to, for utilities. |
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2 |
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3 Copyright (C) 2002, 2003 Free Software Foundation, Inc. |
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4 |
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5 This program is free software; you can redistribute it and/or modify |
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6 it under the terms of the GNU General Public License as published by |
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7 the Free Software Foundation; either version 2, or (at your option) |
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8 any later version. |
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9 |
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10 This program is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 GNU General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU General Public License along |
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16 with this program; if not, write to the Free Software Foundation, |
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17 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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18 |
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19 /* Written by Paul Eggert. */ |
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20 |
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21 #if HAVE_CONFIG_H |
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22 # include <config.h> |
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23 #endif |
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24 |
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25 #include <limits.h> |
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26 #include <stdlib.h> |
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27 |
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28 #if HAVE_UNISTD_H |
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29 # include <unistd.h> |
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30 #endif |
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31 #ifndef _POSIX2_VERSION |
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32 # define _POSIX2_VERSION 0 |
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33 #endif |
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34 |
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35 /* The POSIX version that utilities should conform to. The default is |
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36 specified by the system. */ |
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37 |
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38 int |
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39 posix2_version (void) |
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40 { |
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41 long int v = _POSIX2_VERSION; |
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42 char const *s = getenv ("_POSIX2_VERSION"); |
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43 |
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44 if (s && *s) |
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45 { |
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46 char *e; |
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47 long int i = strtol (s, &e, 10); |
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48 if (! *e) |
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49 v = i; |
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50 } |
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51 |
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52 return v < INT_MIN ? INT_MIN : v < INT_MAX ? v : INT_MAX; |
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53 } |
