The C and C++ Include Header Files

/usr/include/linux/utsname.h


$ cat -n /usr/include/linux/utsname.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _LINUX_UTSNAME_H
     3	#define _LINUX_UTSNAME_H
     4	
     5	#define __OLD_UTS_LEN 8
     6	
     7	struct oldold_utsname {
     8		char sysname[9];
     9		char nodename[9];
    10		char release[9];
    11		char version[9];
    12		char machine[9];
    13	};
    14	
    15	#define __NEW_UTS_LEN 64
    16	
    17	struct old_utsname {
    18		char sysname[65];
    19		char nodename[65];
    20		char release[65];
    21		char version[65];
    22		char machine[65];
    23	};
    24	
    25	struct new_utsname {
    26		char sysname[__NEW_UTS_LEN + 1];
    27		char nodename[__NEW_UTS_LEN + 1];
    28		char release[__NEW_UTS_LEN + 1];
    29		char version[__NEW_UTS_LEN + 1];
    30		char machine[__NEW_UTS_LEN + 1];
    31		char domainname[__NEW_UTS_LEN + 1];
    32	};
    33	
    34	
    35	#endif /* _LINUX_UTSNAME_H */