libct/cgroups/readProcsFile: ret errorr if scan failed
Not sure why but the errors from scanner were ignored. Such errors
can happen if open(2) has succeeded but the subsequent read(2) fails.
@@ -138,7 +138,7 @@ func readProcsFile(file string) ([]int, error) {
out = append(out, pid)
}
}
- return out, nil
+ return out, s.Err()
}
// ParseCgroupFile parses the given cgroup file, typically /proc/self/cgroup
