1 files changed, 53 insertions, 0 deletions
diff --git a/REORG.TODO/string/xpg-strerror.c b/REORG.TODO/string/xpg-strerror.c
new file mode 100644
index 0000000000..4a5e59d5ab
--- /dev/null
+++ b/REORG.TODO/string/xpg-strerror.c
@@ -0,0 +1,53 @@
+/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/param.h>
+
+
+/* Fill buf with a string describing the errno code in ERRNUM.  */
+int
+__xpg_strerror_r (int errnum, char *buf, size_t buflen)
+{
+  const char *estr = __strerror_r (errnum, buf, buflen);
+
+  /* We know that __strerror_r returns buf (with a dynamically computed
+     string) if errnum is invalid, otherwise it returns a string whose
+     storage has indefinite extent.  */
+  if (estr == buf)
+    {
+      assert (errnum < 0 || errnum >= _sys_nerr_internal
+	      || _sys_errlist_internal[errnum] == NULL);
+      return EINVAL;
+    }
+  else
+    {
+      assert (errnum >= 0 && errnum < _sys_nerr_internal
+	      && _sys_errlist_internal[errnum] != NULL);
+
+      size_t estrlen = strlen (estr);
+
+      /* Terminate the string in any case.  */
+      if (buflen > 0)
+	*((char *) __mempcpy (buf, estr, MIN (buflen - 1, estrlen))) = '\0';
+
+      return buflen <= estrlen ? ERANGE : 0;
+    }
+}