1/* Copyright (C) 1991-2020 Free Software Foundation, Inc. 
2 This file is part of the GNU C Library. 
3 
4 The GNU C Library is free software; you can redistribute it and/or 
5 modify it under the terms of the GNU Lesser General Public 
6 License as published by the Free Software Foundation; either 
7 version 2.1 of the License, or (at your option) any later version. 
8 
9 The GNU C Library is distributed in the hope that it will be useful, 
10 but WITHOUT ANY WARRANTY; without even the implied warranty of 
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
12 Lesser General Public License for more details. 
13 
14 You should have received a copy of the GNU Lesser General Public 
15 License along with the GNU C Library; if not, see 
16 <https://www.gnu.org/licenses/>. */ 
17 
18/* 
19 * ISO C99 Standard: 7.5 Errors <errno.h> 
20 */ 
21 
22#ifndef _ERRNO_H 
23#define _ERRNO_H 1 
24 
25#include <features.h> 
26 
27/* The system-specific definitions of the E* constants, as macros. */ 
28#include <bits/errno.h> 
29 
30/* When included from assembly language, this header only provides the 
31 E* constants. */ 
32#ifndef __ASSEMBLER__ 
33 
34__BEGIN_DECLS 
35 
36/* The error code set by various library functions. */ 
37extern int *__errno_location (void) __THROW __attribute_const__; 
38# define errno (*__errno_location ()) 
39 
40# ifdef __USE_GNU 
41 
42/* The full and simple forms of the name with which the program was 
43 invoked. These variables are set up automatically at startup based on 
44 the value of argv[0]. */ 
45extern char *program_invocation_name; 
46extern char *program_invocation_short_name; 
47 
48#include <bits/types/error_t.h> 
49 
50# endif /* __USE_GNU */ 
51 
52__END_DECLS 
53 
54#endif /* !__ASSEMBLER__ */ 
55#endif /* errno.h */ 
56