1 /* Ensure that stdin, stdout, stderr are open. 2 Copyright (C) 2019-2021 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program 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 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 /* Ensures that the file descriptors of stdin, stdout, stderr (0, 1, 2) are 22 open. Exits the program with an error message upon failure; the error 23 message may not appear if stderr is closed. */ 24 extern void xstdopen (void); 25 26 #ifdef __cplusplus 27 } 28 #endif