proc_getargv
ret = proc_getargv(td, p, sb);
error = proc_getargv(curthread, p, &sbarg);
return (proc_getargv(td, p, sb));
error = proc_getargv(curthread, p, &sbarg);
error = proc_getargv(curthread, p, &sb);
int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb);