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dff8da6b | 1 | /* Copyright (C) 1993-2024 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 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://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 | 29 | |
a5406364 FW |
30 | /* This file provides legacy definitions of _IO_stdin_, _IO_stdout_, |
31 | and _IO_stderr_. See stdfiles.c for the current definitions. */ | |
1ea89a40 | 32 | |
bd355af0 | 33 | #define _IO_USE_OLD_IO_FILE |
1ea89a40 UD |
34 | #include "libioP.h" |
35 | ||
36 | #ifdef _IO_MTSAFE_IO | |
bd355af0 | 37 | #define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \ |
1ea89a40 | 38 | static _IO_lock_t _IO_stdfile_##FD##_lock = _IO_lock_initializer; \ |
bd355af0 | 39 | struct _IO_FILE_plus NAME \ |
d64b6ad0 | 40 | = {FILEBUF_LITERAL(CHAIN, FLAGS, FD, NULL), &_IO_old_file_jumps}; |
1ea89a40 | 41 | #else |
bd355af0 UD |
42 | #define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \ |
43 | struct _IO_FILE_plus NAME \ | |
d64b6ad0 | 44 | = {FILEBUF_LITERAL(CHAIN, FLAGS, FD, NULL), &_IO_old_file_jumps}; |
1ea89a40 UD |
45 | #endif |
46 | ||
bd355af0 | 47 | DEF_STDFILE(_IO_stdin_, 0, 0, _IO_NO_WRITES); |
2ca8b1ee GM |
48 | DEF_STDFILE(_IO_stdout_, 1, &_IO_stdin_, _IO_NO_READS); |
49 | DEF_STDFILE(_IO_stderr_, 2, &_IO_stdout_, _IO_NO_READS+_IO_UNBUFFERED); | |
1ea89a40 | 50 | |
85472c20 L |
51 | compat_symbol (libc, _IO_stdin_, _IO_stdin_, GLIBC_2_0); |
52 | compat_symbol (libc, _IO_stdout_, _IO_stdout_, GLIBC_2_0); | |
53 | compat_symbol (libc, _IO_stderr_, _IO_stderr_, GLIBC_2_0); | |
54 | ||
6973fc01 UD |
55 | #if defined __GNUC__ && __GNUC__ >= 2 |
56 | ||
57 | #include <stdio.h> | |
58 | ||
9c4c0024 | 59 | extern const int _IO_stdin_used; |
6973fc01 UD |
60 | weak_extern (_IO_stdin_used); |
61 | ||
62 | #undef stdin | |
63 | #undef stdout | |
64 | #undef stderr | |
65 | ||
66 | extern FILE *stdin; | |
67 | extern FILE *stdout; | |
68 | extern FILE *stderr; | |
69 | ||
79937577 | 70 | static void _IO_check_libio (void) __THROW __attribute__ ((constructor)); |
6973fc01 UD |
71 | |
72 | /* This function determines which shared C library the application | |
73 | was linked against. We then set up the stdin/stdout/stderr and | |
74 | _IO_list_all accordingly. */ | |
75 | ||
76 | static void | |
60d2f8f3 | 77 | _IO_check_libio (void) |
6973fc01 UD |
78 | { |
79 | if (&_IO_stdin_used == NULL) | |
80 | { | |
81 | /* We are using the old one. */ | |
a5406364 FW |
82 | stdin = (FILE *) &_IO_stdin_; |
83 | stdout = (FILE *) &_IO_stdout_; | |
84 | stderr = (FILE *) &_IO_stderr_; | |
d18ea0c5 | 85 | _IO_list_all = &_IO_stderr_; |
a5406364 FW |
86 | stdin->_vtable_offset = stdout->_vtable_offset |
87 | = stderr->_vtable_offset = | |
bd355af0 UD |
88 | ((int) sizeof (struct _IO_FILE) |
89 | - (int) sizeof (struct _IO_FILE_complete)); | |
cb61630e FW |
90 | |
91 | if (_IO_stdin_.vtable != &_IO_old_file_jumps | |
92 | || _IO_stdout_.vtable != &_IO_old_file_jumps | |
93 | || _IO_stderr_.vtable != &_IO_old_file_jumps) | |
94 | IO_set_accept_foreign_vtables (&_IO_vtable_check); | |
6973fc01 UD |
95 | } |
96 | } | |
97 | ||
f2ea0f5b | 98 | #endif |
16710d58 RM |
99 | |
100 | #endif |