#include "substdio.h"#include "subfd.h"#include "stralloc.h"#include "dns.h"#include "dnsdoe.h"#include "readwrite.h"#include "exit.h"stralloc sa = {0};void main(argc,argv)int argc;char **argv;{ if (!argv[1]) _exit(100); if (!stralloc_copys(&sa,argv[1]))  { substdio_putsflush(subfderr,"out of memory\n"); _exit(111); } dns_init(0); dnsdoe(dns_cname(&sa)); substdio_putflush(subfdout,sa.s,sa.len); substdio_putsflush(subfdout,"\n"); _exit(0);}