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b168057a | 1 | /* Copyright (C) 1993-2015 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
1ea89a40 | 3 | |
41bdb6e2 AJ |
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. | |
1ea89a40 | 8 | |
41bdb6e2 AJ |
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 | |
1ea89a40 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 12 | Lesser General Public License for more details. |
1ea89a40 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. | |
1ea89a40 | 17 | |
41bdb6e2 AJ |
18 | As a special exception, if you link the code in this file with |
19 | files compiled with a GNU compiler to produce an executable, | |
20 | that does not cause the resulting executable to be covered by | |
21 | the GNU Lesser General Public License. This exception does not | |
22 | however invalidate any other reasons why the executable file | |
23 | might be covered by the GNU Lesser General Public License. | |
24 | This exception applies to code released by its copyright holders | |
25 | in files containing the exception. */ | |
1ea89a40 | 26 | |
16710d58 RM |
27 | #include <shlib-compat.h> |
28 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) | |
1ea89a40 UD |
29 | |
30 | /* This file provides definitions of _IO_stdin, _IO_stdout, and _IO_stderr | |
31 | for C code. Compare stdstreams.cc. | |
32 | (The difference is that here the vtable field is set to 0, | |
33 | so the objects defined are not valid C++ objects. On the other | |
34 | hand, we don't need a C++ compiler to build this file.) */ | |
35 | ||
bd355af0 | 36 | #define _IO_USE_OLD_IO_FILE |
1ea89a40 UD |
37 | #include "libioP.h" |
38 | ||
39 | #ifdef _IO_MTSAFE_IO | |
bd355af0 | 40 | #define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \ |
1ea89a40 | 41 | static _IO_lock_t _IO_stdfile_##FD##_lock = _IO_lock_initializer; \ |
bd355af0 | 42 | struct _IO_FILE_plus NAME \ |
d64b6ad0 | 43 | = {FILEBUF_LITERAL(CHAIN, FLAGS, FD, NULL), &_IO_old_file_jumps}; |
1ea89a40 | 44 | #else |
bd355af0 UD |
45 | #define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \ |
46 | struct _IO_FILE_plus NAME \ | |
d64b6ad0 | 47 | = {FILEBUF_LITERAL(CHAIN, FLAGS, FD, NULL), &_IO_old_file_jumps}; |
1ea89a40 UD |
48 | #endif |
49 | ||
bd355af0 | 50 | DEF_STDFILE(_IO_stdin_, 0, 0, _IO_NO_WRITES); |
2ca8b1ee GM |
51 | DEF_STDFILE(_IO_stdout_, 1, &_IO_stdin_, _IO_NO_READS); |
52 | DEF_STDFILE(_IO_stderr_, 2, &_IO_stdout_, _IO_NO_READS+_IO_UNBUFFERED); | |
1ea89a40 | 53 | |
6973fc01 UD |
54 | #if defined __GNUC__ && __GNUC__ >= 2 |
55 | ||
56 | #include <stdio.h> | |
57 | ||
9c4c0024 | 58 | extern const int _IO_stdin_used; |
6973fc01 UD |
59 | weak_extern (_IO_stdin_used); |
60 | ||
61 | #undef stdin | |
62 | #undef stdout | |
63 | #undef stderr | |
64 | ||
65 | extern FILE *stdin; | |
66 | extern FILE *stdout; | |
67 | extern FILE *stderr; | |
68 | ||
79937577 | 69 | static void _IO_check_libio (void) __THROW __attribute__ ((constructor)); |
6973fc01 UD |
70 | |
71 | /* This function determines which shared C library the application | |
72 | was linked against. We then set up the stdin/stdout/stderr and | |
73 | _IO_list_all accordingly. */ | |
74 | ||
75 | static void | |
60d2f8f3 | 76 | _IO_check_libio (void) |
6973fc01 UD |
77 | { |
78 | if (&_IO_stdin_used == NULL) | |
79 | { | |
80 | /* We are using the old one. */ | |
2ca8b1ee GM |
81 | _IO_stdin = stdin = (_IO_FILE *) &_IO_stdin_; |
82 | _IO_stdout = stdout = (_IO_FILE *) &_IO_stdout_; | |
83 | _IO_stderr = stderr = (_IO_FILE *) &_IO_stderr_; | |
d18ea0c5 | 84 | _IO_list_all = &_IO_stderr_; |
bd355af0 UD |
85 | _IO_stdin->_vtable_offset = _IO_stdout->_vtable_offset = |
86 | _IO_stderr->_vtable_offset = stdin->_vtable_offset = | |
87 | stdout->_vtable_offset = stderr->_vtable_offset = | |
88 | ((int) sizeof (struct _IO_FILE) | |
89 | - (int) sizeof (struct _IO_FILE_complete)); | |
6973fc01 UD |
90 | } |
91 | } | |
92 | ||
f2ea0f5b | 93 | #endif |
16710d58 RM |
94 | |
95 | #endif |