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2f959dfe | 1 | /* struct ipc_perm definition. |
dff8da6b | 2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
2f959dfe AZ |
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 | <http://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 | It follows the kernel ipc64_perm size so the syscall can be made directly | |
25 | without temporary buffer copy. However, since glibc defines the MODE | |
26 | field as mode_t per POSIX definition (BZ#18231), it omits the __PAD1 field | |
27 | (since glibc does not export mode_t as 16-bit for any architecture). */ | |
28 | struct ipc_perm | |
29 | { | |
30 | __key_t __key; /* Key. */ | |
31 | __uid_t uid; /* Owner's user ID. */ | |
32 | __gid_t gid; /* Owner's group ID. */ | |
33 | __uid_t cuid; /* Creator's user ID. */ | |
34 | __gid_t cgid; /* Creator's group ID. */ | |
35 | __mode_t mode; /* Read/write permission. */ | |
36 | unsigned short int __seq; /* Sequence number. */ | |
37 | unsigned short int __pad2; | |
38 | __syscall_ulong_t __glibc_reserved1; | |
39 | __syscall_ulong_t __glibc_reserved2; | |
40 | }; |