Function kill

src/linux/cgroups.cpp:828–852

Try<Nothing> kill(
    const string& hierarchy,
    const string& cgroup,
    int signal)
{
  Try<set<pid_t>> pids = processes(hierarchy, cgroup);
  if (pids.isError()) {
    return Error("Failed to get processes of cgroup: " + pids.error());
  }

  foreach (pid_t pid, pids.get()) {
    if (::kill(pid, signal) == -1) {
      // If errno is set to ESRCH, it means that either a) this process already
      // terminated, or b) it's in a 'zombie' state and we can't signal it
      // anyway.  In either case, ignore the error.
      if (errno != ESRCH) {
        return ErrnoError(
            "Failed to send " + string(strsignal(signal)) +
            " to process " + stringify(pid));
      }
    }
  }

  return Nothing();
}


Try<string> read(