Mercurial > hg > octave-lojdl > gnulib-hg

annotate lib/posixver.c @ 17476:6057744acd2c default tip master

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author Karl Berry <karl@freefriends.org>
date Fri, 16 Aug 2013 06:32:22 -0700
parents e542fd46ad6f
children
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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) 2002-2006, 2009-2013 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 3 of the License, or
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8 (at your option) 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
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 /* Written by Paul Eggert. */
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19
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20 #include <config.h>
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21
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22 #include "posixver.h"
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23
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24 #include <limits.h>
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25 #include <stdlib.h>
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26
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27 #include <unistd.h>
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28 #ifndef _POSIX2_VERSION
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29 # define _POSIX2_VERSION 0
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30 #endif
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32 #ifndef DEFAULT_POSIX2_VERSION
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33 # define DEFAULT_POSIX2_VERSION _POSIX2_VERSION
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34 #endif
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35
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36 /* The POSIX version that utilities should conform to. The default is
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37 specified by the system. */
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38
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39 int
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40 posix2_version (void)
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41 {
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42 long int v = DEFAULT_POSIX2_VERSION;
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43 char const *s = getenv ("_POSIX2_VERSION");
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45 if (s && *s)
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46 {
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47 char *e;
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48 long int i = strtol (s, &e, 10);
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49 if (! *e)
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50 v = i;
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51 }
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52
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53 return v < INT_MIN ? INT_MIN : v < INT_MAX ? v : INT_MAX;
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54 }