sysctl_jail_param
NULL, 0, sysctl_jail_param, "B", descr);
return (sysctl_jail_param(oidp, arg1, soft, req));
(type) | CTLFLAG_MPSAFE, NULL, 0, sysctl_jail_param, fmt, descr)
sysctl_jail_param, "A", descr)
sysctl_jail_param, fmt, descr)
int sysctl_jail_param(SYSCTL_HANDLER_ARGS);