%{
#include <linux/utsname.h>
%}

function utsname:string (field:long)
%{
  if (down_read_trylock (& uts_sem))
    {
      const char *f =
         (THIS->field == 0 ? system_utsname.sysname :
          THIS->field == 1 ? system_utsname.nodename :
          THIS->field == 2 ? system_utsname.release :
          THIS->field == 3 ? system_utsname.version :
          THIS->field == 4 ? system_utsname.machine :
          THIS->field == 5 ? system_utsname.domainname : "");
      strlcpy (THIS->__retvalue, f, MAXSTRINGLEN);
      up_read (& uts_sem);
    }
%}

probe begin
{
  printf ("%s %s\n", utsname(0), utsname(2))
  exit ()
}