1 /* Copyright (C) 1993-2022 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 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. */ 26 27 #include "libioP.h" 28 #include "stdio.h" 29 30 #undef getchar 31 32 int getchar(void)33getchar (void) 34 { 35 int result; 36 if (!_IO_need_lock (stdin)) 37 return _IO_getc_unlocked (stdin); 38 _IO_acquire_lock (stdin); 39 result = _IO_getc_unlocked (stdin); 40 _IO_release_lock (stdin); 41 return result; 42 } 43 44 #ifndef _IO_MTSAFE_IO 45 #undef getchar_unlocked 46 weak_alias (getchar, getchar_unlocked) 47 #endif 48