| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1991,92,93,94,95,96,97,2002 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, write to the Free |
| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 17 | 02111-1307 USA. */ |
| 18 | |
| 19 | /* |
| 20 | * ISO C99 Standard: 7.5 Errors <errno.h> |
| 21 | */ |
| 22 | |
| 23 | #ifndef _ERRNO_H |
| 24 | |
| 25 | /* The includer defined __need_Emath if he wants only the definitions |
| 26 | of EDOM and ERANGE, and not everything else. */ |
| 27 | #ifndef __need_Emath |
| 28 | # define _ERRNO_H 1 |
| 29 | # include <features.h> |
| 30 | #endif |
| 31 | |
| 32 | __BEGIN_DECLS |
| 33 | |
| 34 | /* Get the error number constants from the system-specific file. |
| 35 | This file will test __need_Emath and _ERRNO_H. */ |
| 36 | #include <bits/errno.h> |
| 37 | #undef __need_Emath |
| 38 | |
| 39 | #ifdef _ERRNO_H |
| 40 | |
| 41 | /* Declare the `errno' variable, unless it's defined as a macro by |
| 42 | bits/errno.h. This is the case in GNU, where it is a per-thread |
| 43 | variable. This redeclaration using the macro still works, but it |
| 44 | will be a function declaration without a prototype and may trigger |
| 45 | a -Wstrict-prototypes warning. */ |
| 46 | #ifndef errno |
| 47 | extern int errno; |
| 48 | #endif |
| 49 | |
| 50 | #if defined __USE_GNU && defined __UCLIBC_HAS_PROGRAM_INVOCATION_NAME__ |
| 51 | |
| 52 | /* The full and simple forms of the name with which the program was |
| 53 | invoked. These variables are set up automatically at startup based on |
| 54 | the value of ARGV[0] (this works only if you use GNU ld). */ |
| 55 | extern const char *program_invocation_name, *program_invocation_short_name; |
| 56 | #endif /* __USE_GNU */ |
| 57 | #endif /* _ERRNO_H */ |
| 58 | |
| 59 | __END_DECLS |
| 60 | |
| 61 | #ifdef _LIBC |
| 62 | #ifdef IS_IN_rtld |
| 63 | # undef errno |
| 64 | # define errno _dl_errno |
| 65 | extern int _dl_errno; /* attribute_hidden */ |
| 66 | #elif defined __UCLIBC_HAS_TLS__ |
| 67 | # if !defined NOT_IN_libc || defined IS_IN_libpthread |
| 68 | # undef errno |
| 69 | # ifndef NOT_IN_libc |
| 70 | # define errno __libc_errno |
| 71 | # else |
| 72 | # define errno errno /* For #ifndef errno tests. */ |
| 73 | # endif |
| 74 | extern __thread int errno attribute_tls_model_ie; |
| 75 | # endif |
| 76 | #endif |
| 77 | |
| 78 | #ifndef __set_errno |
| 79 | #define __set_errno(val) (errno = (val)) |
| 80 | #endif |
| 81 | #endif /* _LIBC */ |
| 82 | |
| 83 | #endif /* _ERRNO_H */ |
| 84 | |
| 85 | /* The Hurd <bits/errno.h> defines `error_t' as an enumerated type so |
| 86 | that printing `error_t' values in the debugger shows the names. We |
| 87 | might need this definition sometimes even if this file was included |
| 88 | before. */ |
| 89 | #if defined __USE_GNU || defined __need_error_t |
| 90 | # ifndef __error_t_defined |
| 91 | typedef int error_t; |
| 92 | # define __error_t_defined 1 |
| 93 | # endif |
| 94 | # undef __need_error_t |
| 95 | #endif |