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The C and C++ Include Header Files

cat -n /usr/include/linux/posix_acl_xattr.h

     1	/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
     2	/*
     3	 * Copyright (C) 2002 Andreas Gruenbacher <a.gruenbacher@computer.org>
     4	 * Copyright (C) 2016 Red Hat, Inc.
     5	 *
     6	 * This file is free software; you can redistribute it and/or
     7	 * modify it under the terms of the GNU Lesser General Public
     8	 * License as published by the Free Software Foundation; either
     9	 * version 2.1 of the License, or (at your option) any later version.
    10	 *
    11	 * This file is distributed in the hope that it will be useful,
    12	 * but WITHOUT ANY WARRANTY; without even the implied warranty of
    13	 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    14	 * Lesser General Public License for more details.
    15	 *
    16	 */
    17	
    18	#ifndef __UAPI_POSIX_ACL_XATTR_H
    19	#define __UAPI_POSIX_ACL_XATTR_H
    20	
    21	#include <linux/types.h>
    22	
    23	/* Supported ACL a_version fields */
    24	#define POSIX_ACL_XATTR_VERSION	0x0002
    25	
    26	/* An undefined entry e_id value */
    27	#define ACL_UNDEFINED_ID	(-1)
    28	
    29	struct posix_acl_xattr_entry {
    30		__le16			e_tag;
    31		__le16			e_perm;
    32		__le32			e_id;
    33	};
    34	
    35	struct posix_acl_xattr_header {
    36		__le32			a_version;
    37	};
    38	
    39	#endif	/* __UAPI_POSIX_ACL_XATTR_H */