Simplify and modernize strerror substitute, partly to fix Solaris 8 bug.

[gnulib.git] / lib / strerror.c

diff --git a/lib/strerror.c b/lib/strerror.c
index 7c17f1f..9b9ffd1 100644 (file)
--- a/lib/strerror.c
+++ b/lib/strerror.c
@@ -1,12 +1,11 @@
-/* strerror.c --- ANSI C compatible system error routine
+/* strerror.c --- POSIX compatible system error routine
 
-   Copyright (C) 1986, 1988, 1989, 1991, 2002, 2003 Free Software
-   Foundation, Inc.
+   Copyright (C) 2007 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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.
+   the Free Software Foundation; either version 3 of the License, 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
@@ -14,36 +13,37 @@
    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.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
+
+#include <string.h>
+
+#if REPLACE_STRERROR
+
+# include <stdio.h>
 
-#include <limits.h>
+# include "intprops.h"
 
-/* Don't include <stdio.h>, since it may or may not declare
-   sys_errlist and its declarations may collide with ours.  Just
-   declare the stuff that we need directly.  Standard hosted C89
-   implementations define strerror and they don't need this strerror
-   function, so take some liberties with the standard to cater to
-   ancient or limited freestanding implementations.  */
-int sprintf (char *, char const *, ...);
-extern int sys_nerr;
-extern char *sys_errlist[];
+# undef strerror
+# if ! HAVE_DECL_STRERROR
+#  define strerror(n) NULL
+# endif
 
 char *
-strerror (int n)
+rpl_strerror (int n)
 {
-  static char const fmt[] = "Unknown error (%d)";
-  static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3];
+  char *result = strerror (n);
 
-  if (n < 0 || n >= sys_nerr)
+  if (! result)
     {
+      static char const fmt[] = "Unknown error (%d)";
+      static char mesg[sizeof fmt + INT_STRLEN_BOUND (n)];
       sprintf (mesg, fmt, n);
       return mesg;
     }
-  else
-    return sys_errlist[n];
+
+  return result;
 }
+
+#endif