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annotate lib/posixver.c @ 12421:e8d2c6fc33ad

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Use spaces for indentation, not tabs.
author Bruno Haible <bruno@clisp.org>
date Thu, 10 Dec 2009 20:28:30 +0100
parents bbbbbf4cd1c5
children b5e42ef33b49
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1 /* Which POSIX version to conform to, for utilities.
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3 Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software
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4 Foundation, Inc.
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5
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6 This program is free software: you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3 of the License, or
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9 (at your option) any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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18
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19 /* Written by Paul Eggert. */
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20
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21 #include <config.h>
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23 #include "posixver.h"
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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 #include <unistd.h>
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29 #ifndef _POSIX2_VERSION
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30 # define _POSIX2_VERSION 0
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31 #endif
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33 #ifndef DEFAULT_POSIX2_VERSION
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34 # define DEFAULT_POSIX2_VERSION _POSIX2_VERSION
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35 #endif
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36
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37 /* The POSIX version that utilities should conform to. The default is
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38 specified by the system. */
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39
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40 int
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41 posix2_version (void)
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42 {
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43 long int v = DEFAULT_POSIX2_VERSION;
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44 char const *s = getenv ("_POSIX2_VERSION");
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45
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46 if (s && *s)
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47 {
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48 char *e;
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49 long int i = strtol (s, &e, 10);
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50 if (! *e)
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51 v = i;
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52 }
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53
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54 return v < INT_MIN ? INT_MIN : v < INT_MAX ? v : INT_MAX;
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55 }