setdomainname
if (setdomainname(*argv, strlen(*argv)))
int setdomainname(const char *, size_t);
__weak_alias(setdomainname,_setdomainname)
setdomainname(const char *name, size_t namelen)
ATF_REQUIRE_ERRNO(EPERM, setdomainname(domain, sizeof(domain)) == -1);
(void)setdomainname(domain, sizeof(domain));
ATF_REQUIRE(setdomainname(domains[i],sizeof(domains[i])) == 0);
(void)setdomainname(domain, sizeof(domain));
(void)setdomainname(domain, sizeof(domain));
ATF_REQUIRE(setdomainname(name, sizeof(name)) == -1);
(void)setdomainname(domain, sizeof(domain));