55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
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/* Which POSIX version to conform to, for utilities.
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Copyright (C) 2002-2006, 2009-2020 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Paul Eggert. */
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#include <config.h>
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#include "posixver.h"
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#include <limits.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifndef _POSIX2_VERSION
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# define _POSIX2_VERSION 0
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#endif
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#ifndef DEFAULT_POSIX2_VERSION
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# define DEFAULT_POSIX2_VERSION _POSIX2_VERSION
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#endif
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/* The POSIX version that utilities should conform to. The default is
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specified by the system. */
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int
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posix2_version (void)
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{
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long int v = DEFAULT_POSIX2_VERSION;
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char const *s = getenv ("_POSIX2_VERSION");
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if (s && *s)
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{
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char *e;
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long int i = strtol (s, &e, 10);
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if (! *e)
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v = i;
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}
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return v < INT_MIN ? INT_MIN : v < INT_MAX ? v : INT_MAX;
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}
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