| 1 | /* Which POSIX version to conform to, for utilities.
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| 2 |
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| 3 | Copyright (C) 2002 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 it
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| 6 | under the terms of the GNU Library General Public License as published
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| 7 | by 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 GNU
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| 13 | Library 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 Library General Public
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| 16 | License along with this program; if not, write to the Free Software
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| 17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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| 18 | USA. */
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| 19 |
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| 20 | /* Written by Paul Eggert. */
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| 21 |
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| 22 | #if HAVE_CONFIG_H
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| 23 | # include <config.h>
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| 24 | #endif
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| 25 |
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| 26 | #include <limits.h>
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| 27 |
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| 28 | #include <stdlib.h>
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| 29 | #if !HAVE_DECL_GETENV && !defined getenv
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| 30 | char *getenv ();
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| 31 | #endif
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| 32 |
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| 33 | #if HAVE_UNISTD_H
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| 34 | # include <unistd.h>
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| 35 | #endif
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| 36 | #ifndef _POSIX2_VERSION
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| 37 | # define _POSIX2_VERSION 0
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| 38 | #endif
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| 39 |
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| 40 | /* The POSIX version that utilities should conform to. The default is
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| 41 | specified by the system. */
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| 42 |
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| 43 | int
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| 44 | posix2_version (void)
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| 45 | {
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| 46 | long int v = _POSIX2_VERSION;
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| 47 | char const *s = getenv ("_POSIX2_VERSION");
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| 48 |
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| 49 | if (s && *s)
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| 50 | {
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| 51 | char *e;
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| 52 | long int i = strtol (s, &e, 10);
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| 53 | if (! *e)
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| 54 | v = i;
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| 55 | }
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| 56 |
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| 57 | return v < INT_MIN ? INT_MIN : v < INT_MAX ? v : INT_MAX;
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| 58 | }
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