Current File : //usr/include/x86_64-linux-gnu/bits/ipc-perm.h
/* struct ipc_perm definition.
Copyright (C) 2019-2024 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;
};
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