wait4
(void) wait4(pid, &status, 0, NULL);
(void) wait4(pid, &status, 0, NULL);
(void) wait4(pid, &status, 0, NULL);
return (wait4(0, stat_loc, options, rp));
while (wait4(pid, &stat, 0, NULL) != -1) {
if (wait4(ctx->i_pid, &status, 0, &res) < 0) {
extern pid_t wait4(pid_t, int *, int, struct rusage *);
return (wait4(0, status, options, rp));
extern pid_t wait4(pid_t, int *, int, struct rusage *);