jailparam_get
jid = jailparam_get(jp, njp, flags);
extern int jailparam_get(struct jailparam *jp, unsigned njp, int flags);
iter->jid = jailparam_get(jp, iter->params_count, 0);
jid = jailparam_get(params, params_count, flags);
vs->jid = jailparam_get(params, psize, 0);
if (jailparam_get(rtparams, nrt, 0) > 0) {
jid = jailparam_get(params, nparams, jflags);