new file mode 100644
--- /dev/null
+++ b/lib/xstrtoumax.c
@@ -0,0 +1,99 @@
+/* xstrtoumax.c -- A more useful interface to strtoumax.
+   Copyright 1999 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU 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 General Public License for more details.
+
+   You should have received a copy of the GNU 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
+
+#if HAVE_STRTOUMAX
+# define __strtol strtoumax
+#else
+# define __strtol my_strtoumax
+
+  /* Define a temporary implementation, intended to hold the fort only
+     until glibc has an implementation of the C9x standard function
+     strtoumax.  When glibc implements strtoumax, we can remove the
+     following function in favor of a replacement file strtoumax.c taken
+     from glibc.  */
+
+# if HAVE_INTTYPES_H
+#  include <inttypes.h>
+# endif
+
+# if HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+
+# ifndef PARAMS
+#  if defined PROTOTYPES || defined __STDC__
+#   define PARAMS(Args) Args
+#  else
+#   define PARAMS(Args) ()
+#  endif
+# endif
+
+static uintmax_t my_strtoumax PARAMS ((char const *, char **, int));
+#endif
+
+#define __strtol_t uintmax_t
+#define __xstrtol xstrtoumax
+#include "xstrtol.c"
+
+#if !HAVE_STRTOUMAX
+
+static uintmax_t
+my_strtoumax (char const *ptr, char **endptr, int base)
+{
+# define USE_IF_EQUIVALENT(function) \
+    if (sizeof (uintmax_t) == sizeof function (ptr, endptr, base)) \
+      return function (ptr, endptr, base);
+
+  USE_IF_EQUIVALENT (strtoul)
+
+# if HAVE_STRTOULL
+    USE_IF_EQUIVALENT (strtoull)
+# endif
+
+# if HAVE_STRTOUQ
+    USE_IF_EQUIVALENT (strtouq)
+# endif
+
+  {
+    /* An implementation with uintmax_t longer than long, but with no
+       known way to convert it.  Do it by hand.  Assume base 10.  */
+    uintmax_t n = 0;
+    int overflow = 0;
+    for (;  '0' <= *ptr && *ptr <= '9';  ptr++)
+      {
+	uintmax_t n10 = n * 10;
+	int digit = *ptr - '0';
+	overflow |= ! (n10 / 10 == n && n10 < n10 + digit);
+	n = n10 + digit;
+      }
+    if (endptr)
+      *endptr = (char *) ptr;
+    if (overflow)
+      {
+	errno = ERANGE;
+	n = (uintmax_t) -1;
+      }
+    return n;
+  }
+}
+#endif /* HAVE_STRTOUMAX */