1  /* struct ipc_perm definition.
       2     Copyright (C) 1995-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library 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 GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef _SYS_IPC_H
      20  # error "Never use <bits/ipc-perm.h> directly; include <sys/ipc.h> instead."
      21  #endif
      22  
      23  /* Data structure used to pass permission information to IPC operations.  */
      24  struct ipc_perm
      25    {
      26      __key_t __key;			/* Key.  */
      27      unsigned short int uid;		/* Owner's user ID.  */
      28      unsigned short int gid;		/* Owner's group ID.  */
      29      unsigned short int cuid;		/* Creator's user ID.  */
      30      unsigned short int cgid;		/* Creator's group ID.  */
      31      unsigned short int mode;		/* Read/write permission.  */
      32      unsigned short int __seq;		/* Sequence number.  */
      33    };