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-rw-r--r--include/errno.h70
1 files changed, 60 insertions, 10 deletions
diff --git a/include/errno.h b/include/errno.h
index aa7e6bcae..645a439db 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -1,23 +1,73 @@
-#ifndef _ERRNO_H
-#define _ERRNO_H
+/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/*
+ * ISO C99 Standard: 7.5 Errors <errno.h>
+ */
+
+#ifndef _ERRNO_H
+
+/* The includer defined __need_Emath if he wants only the definitions
+ of EDOM and ERANGE, and not everything else. */
+#ifndef __need_Emath
+#define _ERRNO_H 1
#include <features.h>
-#include <bits/errno.h>
+#endif
__BEGIN_DECLS
-extern int sys_nerr;
-extern const char *const sys_errlist[];
+/* Get the error number constants from the system-specific file.
+ This file will test __need_Emath and _ERRNO_H. */
+#include <bits/errno.h>
+#undef __need_Emath
-#define _sys_nerr sys_nerr
-#define _sys_errlist sys_errlist
+#ifdef _ERRNO_H
+/* Declare the `errno' variable, unless it's defined as a macro by
+ bits/errno.h. This is the case in GNU, where it is a per-thread
+ variable. This redeclaration using the macro still works, but it
+ will be a function declaration without a prototype and may trigger
+ a -Wstrict-prototypes warning. */
#ifndef errno
-extern int errno;
+extern int errno;
#endif
-extern void perror __P ((__const char* __s));
-extern char* strerror __P ((int __errno));
+
+#ifdef __USE_GNU
+
+/* The full and simple forms of the name with which the program was
+ invoked. These variables are set up automatically at startup based on
+ the value of ARGV[0] (this works only if you use GNU ld). */
+extern char *program_invocation_name, *program_invocation_short_name;
+#endif /* __USE_GNU */
+#endif /* _ERRNO_H */
__END_DECLS
+#endif /* _ERRNO_H */
+
+/* The Hurd <bits/errno.h> defines `error_t' as an enumerated type so
+ that printing `error_t' values in the debugger shows the names. We
+ might need this definition sometimes even if this file was included
+ before. */
+#if defined __USE_GNU || defined __need_error_t
+# ifndef __error_t_defined
+typedef int error_t;
+# define __error_t_defined 1
+# endif
+# undef __need_error_t
#endif