1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/mach/_strerror.c b/sysdeps/mach/_strerror.c
new file mode 100644
index 0000000000..4740902a10
--- /dev/null
+++ b/sysdeps/mach/_strerror.c
@@ -0,0 +1,60 @@
+/* Copyright (C) 1993 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <stdio.h>
+#include <string.h>
+#include <mach/error.h>
+#include <mach/errorlib.h>
+
+/* Return a string describing the errno code in ERRNUM.  */
+char *
+DEFUN(_strerror_internal, (errnum, buf), int errnum AND char buf[1024])
+{
+  int system; 
+  int sub;
+  int code;
+  const struct error_system *es;
+  extern void __mach_error_map_compat (int *);
+
+  __mach_error_map_compat (&errnum);
+
+  system = err_get_system (errnum);
+  sub = err_get_sub (errnum);
+  code = err_get_code (errnum);
+
+  if (system > err_max_system)
+    {
+      sprintf (buf, "Unknown error system %d", system);
+      return buf;
+    }
+
+  es = &__mach_error_systems[system];
+
+  if (sub >= es->max_sub)
+    return (char *) es->bad_sub;
+
+  if (code >= es->subsystem[sub].max_code)
+    {
+      sprintf (buf, "Unknown error %d in system %d subsystem %d",
+	       code, system, sub);
+      return buf;
+    }
+
+  return (char *) es->subsystem[sub].codes[code];
+}