getfmt
ki->ki_args = getfmt(kvm_getargv, ki, KI_PROC(ki, comm),
ki->ki_env = getfmt(kvm_getenvv, ki, NULL, 0);
static const char *getfmt (char **(*)(kvm_t *, const struct kinfo_proc *, int),
wf->setfmt(wf, getfmt(optarg));
wf = athstats_new(ifname, getfmt("default"));
wf = wlanstats_new(ifname, getfmt("default"));
wf->setfmt(wf, getfmt(optarg));