The C and C++ Include Header Files

/usr/include/net/if_slip.h


$ cat -n /usr/include/net/if_slip.h

     1	/* Copyright (C) 1997-2024 Free Software Foundation, Inc.
     2	   This file is part of the GNU C Library.
     3	
     4	   The GNU C Library is free software; you can redistribute it and/or
     5	   modify it under the terms of the GNU Lesser General Public
     6	   License as published by the Free Software Foundation; either
     7	   version 2.1 of the License, or (at your option) any later version.
     8	
     9	   The GNU C Library is distributed in the hope that it will be useful,
    10	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    11	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12	   Lesser General Public License for more details.
    13	
    14	   You should have received a copy of the GNU Lesser General Public
    15	   License along with the GNU C Library; if not, see
    16	   <https://www.gnu.org/licenses/>.  */
    17	
    18	#ifndef _NET_IF_SLIP_H
    19	#define _NET_IF_SLIP_H 1
    20	
    21	/* We can use the kernel header.  */
    22	#include <linux/if_slip.h>
    23	
    24	#endif	/* net/if_slip.h.  */