ftok
__weak_alias(ftok,_ftok)
ftok(const char *path, int id)
key_t ftok(const char *, int);
key = ftok(token_key, id);
ATF_REQUIRE(ftok("/a/b/c/d/e/f/g/h/i", key) == -1);
k1 = ftok(path, key);
k2 = ftok(hlnk, key);
k3 = ftok(slnk, key);