glibc (2.38)
1 /* Copyright (C) 1991-2023 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. */
37 extern 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]. */
45 extern char *program_invocation_name;
46 extern 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 */
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