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-rw-r--r--lib/posixver.c58
-rw-r--r--lib/posixver.h1
2 files changed, 59 insertions, 0 deletions
diff --git a/lib/posixver.c b/lib/posixver.c
new file mode 100644
index 000000000..c45ac315b
--- /dev/null
+++ b/lib/posixver.c
@@ -0,0 +1,58 @@
+/* Which POSIX version to conform to, for utilities.
+
+ Copyright (C) 2002 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Library General Public License as published
+ by the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ USA. */
+
+/* Written by Paul Eggert. */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <limits.h>
+
+#include <stdlib.h>
+#if !HAVE_DECL_GETENV && !defined getenv
+char *getenv ();
+#endif
+
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#ifndef _POSIX2_VERSION
+# define _POSIX2_VERSION 0
+#endif
+
+/* The POSIX version that utilities should conform to. The default is
+ specified by the system. */
+
+int
+posix2_version (void)
+{
+ long int v = _POSIX2_VERSION;
+ char const *s = getenv ("_POSIX2_VERSION");
+
+ if (s && *s)
+ {
+ char *e;
+ long int i = strtol (s, &e, 10);
+ if (! *e)
+ v = i;
+ }
+
+ return v < INT_MIN ? INT_MIN : v < INT_MAX ? v : INT_MAX;
+}
diff --git a/lib/posixver.h b/lib/posixver.h
new file mode 100644
index 000000000..b64f6a2ea
--- /dev/null
+++ b/lib/posixver.h
@@ -0,0 +1 @@
+int posix2_version (void);