1  /* Ensure that stdin, stdout, stderr are open.
       2     Copyright (C) 2019-2023 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