Function foreach

src/linux/ns.cpp:111–117

  Try<std::list<string>> entries = os::ls("/proc/self/ns");
  if (entries.isSome()) {
    foreach (const string& entry, entries.get()) {
      // Introduced in Linux 4.12, pid_for_children is a handle for the PID
      // namespace of child processes created by the current process.
      if (entry != "pid_for_children") {
        result.insert(entry);
      }
    }
  }

  return result;