-#ifndef __ERRNO_H
-#define __ERRNO_H
+/* Copyright (C) 1991,92,93,94,95,96,97,2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
-#include <features.h>
-#include <linux/errno.h>
+ 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.
-#ifdef __USE_BSD
-extern int sys_nerr;
-extern char *sys_errlist[];
-#endif
-#ifdef __USE_GNU
-extern int _sys_nerr;
-extern char *_sys_errlist[];
-#endif
+ 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/>. */
-extern int errno;
+/*
+ * 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>
+#endif
__BEGIN_DECLS
-extern void perror __P ((__const char* __s));
-extern char* strerror __P ((int __errno));
+/* 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
+
+#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;
+#endif
+
+#ifdef _LIBC
+# ifdef __UCLIBC_HAS___PROGNAME__
+extern const char *__progname, *__progname_full;
+# endif
+#endif
+#if defined __USE_GNU && defined __UCLIBC_HAS_PROGRAM_INVOCATION_NAME__
+
+/* 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 const char *program_invocation_name, *program_invocation_short_name;
+#endif /* __USE_GNU */
+#endif /* _ERRNO_H */
__END_DECLS
+#ifdef _LIBC
+#ifdef IS_IN_rtld
+# undef errno
+# define errno _dl_errno
+extern int _dl_errno; /* attribute_hidden */
+#elif defined __UCLIBC_HAS_TLS__
+# if !defined NOT_IN_libc || defined IS_IN_libpthread
+# undef errno
+# ifndef NOT_IN_libc
+# define errno __libc_errno
+# else
+# define errno errno /* For #ifndef errno tests. */
+# endif
+extern __thread int errno attribute_tls_model_ie;
+# endif
+#endif
+
+#ifndef __set_errno
+#define __set_errno(val) (errno = (val))
+#endif
+#endif /* _LIBC */
+
+#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
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