fmt_argv
const char *fmt_argv(char **, char *, char *, size_t);
s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm,
char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */
ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),