Function zap_contains

freebsd/contrib/openzfs/module/zfs/zap_micro.c:1117–1125

}

int
zap_contains(objset_t *os, uint64_t zapobj, const char *name)
{
	int err = zap_lookup_norm(os, zapobj, name, 0,
	    0, NULL, 0, NULL, 0, NULL);
	if (err == EOVERFLOW || err == EINVAL)
		err = 0; /* found, but skipped reading the value */
	return (err);
}

int
zap_length(objset_t *os, uint64_t zapobj, const char *name,