pr_allstopped
while (pr_allstopped(p, 0) > 0) {
while (p != NULL && pr_allstopped(p, 0) > 0) {
while (pr_allstopped(p, 1) > 0) {
while (pr_allstopped(p, 0) > 0) {
extern int pr_allstopped(proc_t *, int);