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Edit File: ipc-perm.h
/* struct ipc_perm definition. Copyright (C) 2019-2021 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _SYS_IPC_H # error "Never use <bits/ipc-perm.h> directly; include <sys/ipc.h> instead." #endif /* Data structure used to pass permission information to IPC operations. It follows the kernel ipc64_perm size so the syscall can be made directly without temporary buffer copy. However, since glibc defines the MODE field as mode_t per POSIX definition (BZ#18231), it omits the __PAD1 field (since glibc does not export mode_t as 16-bit for any architecture). */ struct ipc_perm { __key_t __key; /* Key. */ __uid_t uid; /* Owner's user ID. */ __gid_t gid; /* Owner's group ID. */ __uid_t cuid; /* Creator's user ID. */ __gid_t cgid; /* Creator's group ID. */ __mode_t mode; /* Read/write permission. */ unsigned short int __seq; /* Sequence number. */ unsigned short int __pad2; __syscall_ulong_t __glibc_reserved1; __syscall_ulong_t __glibc_reserved2; };