#pragma once #define _UTSNAME_LENGTH 256 struct utsname { char sysname[_UTSNAME_LENGTH]; char nodename[_UTSNAME_LENGTH]; char release[_UTSNAME_LENGTH]; char version[_UTSNAME_LENGTH]; char machine[_UTSNAME_LENGTH]; char domainname[_UTSNAME_LENGTH]; }; extern int uname(struct utsname *__name);