/* overall CPU utilization */
schedstat = openat(procfd, "schedstat", O_RDONLY);
if (schedstat == -1) {
/* overall CPU utilization */
schedstat = openat(procfd, "schedstat", O_RDONLY);
if (schedstat == -1) {
/* ppid */
sprintf(filename, "%d/stat", pid);
fd = openat(procfd, filename, O_RDONLY);
/* ppid */
sprintf(filename, "%d/stat", pid);
fd = openat(procfd, filename, O_RDONLY);
if (!sscanf(buf, "%s %s %*s", rt, wt))
continue;
if (!sscanf(buf, "%s %s %*s", rt, wt))
continue;