1  /* Determine the parent process of a given process.
       2     Copyright (C) 2019-2023 Free Software Foundation, Inc.
       3     Written by Bruno Haible <bruno@clisp.org>, 2019.
       4  
       5     This file is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU Lesser General Public License as
       7     published by the Free Software Foundation, either version 3 of the
       8     License, or (at your option) any later version.
       9  
      10     This file is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13     GNU Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifndef _GET_PPID_OF_H
      19  #define _GET_PPID_OF_H
      20  
      21  #include <sys/types.h>
      22  
      23  #ifdef __cplusplus
      24  extern "C" {
      25  #endif
      26  
      27  /* Returns the process id of the parent process of the given process,
      28     or 0 if it cannot be determined.  */
      29  extern pid_t get_ppid_of (pid_t pid);
      30  
      31  #ifdef __cplusplus
      32  }
      33  #endif
      34  
      35  #endif /* _GET_PPID_OF_H */