permissioner

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/**
 * Permissioner: set file ownerships and permissions
 * Copyright 2020: Stefan Schuermans, Aachen, Germany <stefan@schuermans.info>
 * Copyleft: GNU GENERAL PUBLIC LICENSE version 3 (see LICENSE)
 */
#include <permissioner/Callback.h>
#include <permissioner/Config.h>
#include <chrono>
#include <csignal>
#include <cstdlib>
#include <iostream>
#include <stdexcept>
#include <string>
#include <thread>
class DaemonCallback : public Callback {
public:
  DaemonCallback() : go_on(true) {}
  bool callback();
  std::chrono::duration<float, std::ratio<1>> sleepTime;
  template <class Rep, class Period>
  bool iterativeSleep(std::chrono::duration<Rep, Period> duration) const;
  bool go_on;
};
bool DaemonCallback::callback() {
  iterativeSleep(sleepTime);
  return go_on;
}
// iterative sleep, watching go_on, returns whether sleep completed
template <class Rep, class Period>
bool DaemonCallback::iterativeSleep(
    std::chrono::duration<Rep, Period> duration) const {
  const std::chrono::duration<int, std::milli> zero(0), step(100);
  while (duration > zero && go_on) {
    if (duration >= step) {
      std::this_thread::sleep_for(step);
      duration -= step;
    } else {
      std::this_thread::sleep_for(duration);
      duration = zero;
    }
  }
  return duration <= zero;
}
DaemonCallback daemonCallback;
 
 
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