add directory gnu

gnu/glibc/glibc-1.03/string/strerror.c

@@ -0,0 +1,50 @@
+/* Copyright (C) 1991 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>
+
+#ifndef HAVE_GNU_LD
+#define _sys_errlist sys_errlist
+#define _sys_nerr sys_nerr
+#endif
+
+/* Defined in stdio/sys_errlist.c.  */
+extern CONST char *CONST _sys_errlist[];
+extern CONST int _sys_nerr;
+
+/* Return a string descibing the errno code in ERRNUM.
+   The storage is good only until the next call to strerror.
+   Writing to the storage causes undefined behavior.  */
+char *
+DEFUN(strerror, (errnum), int errnum)
+{
+  if (errnum < 0 || errnum > _sys_nerr)
+    {
+      static char unknown_error[] = "Unknown error 000000000000000000";
+      static char fmt[] = "Unknown error %d";
+      size_t len = sprintf(unknown_error, fmt, errnum);
+      if (len < sizeof(fmt) - 2)
+	return NULL;
+      unknown_error[len - 1] = '\0';
+      return unknown_error;
+    }
+
+  return (char *) _sys_errlist[errnum];
+}