| 1 | /* Copyright (C) 1991-2016 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 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | /* |
| 19 | * ISO C99 Standard: 7.5 Errors <errno.h> |
| 20 | */ |
| 21 | |
| 22 | #ifndef _ERRNO_H |
| 23 | |
| 24 | /* The includer defined __need_Emath if he wants only the definitions |
| 25 | of EDOM and ERANGE, and not everything else. */ |
| 26 | #ifndef __need_Emath |
| 27 | # define _ERRNO_H 1 |
| 28 | # include <features.h> |
| 29 | #endif |
| 30 | |
| 31 | __BEGIN_DECLS |
| 32 | |
| 33 | /* Get the error number constants from the system-specific file. |
| 34 | This file will test __need_Emath and _ERRNO_H. */ |
| 35 | #include <bits/errno.h> |
| 36 | #undef __need_Emath |
| 37 | |
| 38 | #ifdef _ERRNO_H |
| 39 | |
| 40 | /* Declare the `errno' variable, unless it's defined as a macro by |
| 41 | bits/errno.h. This is the case in GNU, where it is a per-thread |
| 42 | variable. This redeclaration using the macro still works, but it |
| 43 | will be a function declaration without a prototype and may trigger |
| 44 | a -Wstrict-prototypes warning. */ |
| 45 | #ifndef errno |
| 46 | extern int errno; |
| 47 | #endif |
| 48 | |
| 49 | #ifdef __USE_GNU |
| 50 | |
| 51 | /* The full and simple forms of the name with which the program was |
| 52 | invoked. These variables are set up automatically at startup based on |
| 53 | the value of ARGV[0] (this works only if you use GNU ld). */ |
| 54 | extern char *program_invocation_name, *program_invocation_short_name; |
| 55 | #endif /* __USE_GNU */ |
| 56 | #endif /* _ERRNO_H */ |
| 57 | |
| 58 | __END_DECLS |
| 59 | |
| 60 | #endif /* _ERRNO_H */ |
| 61 | |
| 62 | /* The Hurd <bits/errno.h> defines `error_t' as an enumerated type so |
| 63 | that printing `error_t' values in the debugger shows the names. We |
| 64 | might need this definition sometimes even if this file was included |
| 65 | before. */ |
| 66 | #if defined __USE_GNU || defined __need_error_t |
| 67 | # ifndef __error_t_defined |
| 68 | typedef int error_t; |
| 69 | # define __error_t_defined 1 |
| 70 | # endif |
| 71 | # undef __need_error_t |
| 72 | #endif |
| 73 |