fstatat
if (fstatat(dfd, entry->d_name, &statb, 0)
int fstatat(int, const char *, struct stat *, int);
if ((OPENAT_TZDIR ? fstatat(dd, relname, &st, 0) : stat(name, &st))
__weak_alias(fstatat,rump___sysimpl_fstatat);
int fstatat(int, const char *, struct stat *, int);
ATF_REQUIRE(fstatat(AT_FDCWD, FILEERR, &st, 0) == -1);
ATF_REQUIRE(fstatat(dfd, FILEERR, &st, 0) == -1);
ATF_REQUIRE(fstatat(dfd, BASEFILE, &st, 0) == -1);
ATF_REQUIRE(fstatat(-1, FILE, &st, 0) == -1);
ATF_REQUIRE(fstatat(dfd, BASELINK, &st, 0) == -1);
ATF_REQUIRE(fstatat(dfd, BASELINK, &st, AT_SYMLINK_NOFOLLOW) == 0);
ATF_REQUIRE(fstatat(dfd, BASEFILE, &st1, 0) == 0);
ATF_REQUIRE(fstatat(AT_FDCWD, BASEFILE, &st, 0) == 0);
ATF_REQUIRE(fstatat(dfd, BASEFILE, &sb, 0) == 0);