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File name : ipcbuf.h

Content :/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef __ASM_GENERIC_IPCBUF_H #define __ASM_GENERIC_IPCBUF_H /* * The generic ipc64_perm structure: * Note extra padding because this structure is passed back and forth * between kernel and user space. * * ipc64_perm was originally meant to be architecture specific, but * everyone just ended up making identical copies without specific * optimizations, so we may just as well all use the same one. * * Pad space is left for: * - 32-bit mode_t on architectures that only had 16 bit * - 32-bit seq * - 2 miscellaneous 32-bit values */ struct ipc64_perm { __kernel_key_t key; __kernel_uid32_t uid; __kernel_gid32_t gid; __kernel_uid32_t cuid; __kernel_gid32_t cgid; __kernel_mode_t mode; /* pad if mode_t is u16: */ unsigned char __pad1[4 - sizeof(__kernel_mode_t)]; unsigned short seq; unsigned short __pad2; __kernel_ulong_t __unused1; __kernel_ulong_t __unused2; }; #endif /* __ASM_GENERIC_IPCBUF_H */

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