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#pragma once
#include <experimental/filesystem>
#include <functional>
#include <systemd/sd-event.h>
#include <sys/inotify.h>
#include <map>
#include "dump_utils.hpp"
namespace phosphor
{
namespace dump
{
namespace inotify
{
namespace fs = std::experimental::filesystem;
//User specific call back function input map(path:event) type.
using UserMap = std::map<fs::path, uint32_t>;
//User specific callback function wrapper type.
using UserType = std::function<void(const UserMap&)>;
/** @class Watch
*
* @brief Adds inotify watch on directory.
*
* The inotify watch is hooked up with sd-event, so that on call back,
* appropriate actions are taken to collect files from the directory
* initialized by the object.
*/
class Watch
{
public:
/** @brief ctor - hook inotify watch with sd-event
*
* @param[in] eventObj - Event loop object
* @param[in] flags - inotify flags
* @param[in] mask - Mask of events
* @param[in] events - Events to be watched
* @param[in] path - File path to be watched
* @param[in] userFunc - User specific callback fnction wrapper.
*
*/
Watch(const EventPtr& eventObj,
int flags,
uint32_t mask,
uint32_t events,
const fs::path& path,
UserType userFunc);
Watch(const Watch&) = delete;
Watch& operator=(const Watch&) = delete;
Watch(Watch&&) = default;
Watch& operator=(Watch&&) = default;
/* @brief dtor - remove inotify watch and close fd's */
~Watch();
private:
/** @brief sd-event callback.
* @details Collects the files and event info and call the
* appropriate user function for further action.
*
* @param[in] s - event source, floating (unused) in our case
* @param[in] fd - inotify fd
* @param[in] revents - events that matched for fd
* @param[in] userdata - pointer to Watch object
*
* @returns 0 on success, -1 on fail
*/
static int callback(sd_event_source* s,
int fd,
uint32_t revents,
void* userdata);
/** initialize an inotify instance and returns file descriptor */
int inotifyInit();
/** @brief inotify flags */
int flags;
/** @brief Mask of events */
uint32_t mask;
/** @brief Events to be watched */
uint32_t events;
/** @brief File path to be watched */
fs::path path;
/** @brief dump file directory watch descriptor */
int wd = -1;
/** @brief file descriptor manager */
CustomFd fd;
/** @brief The user level callback function wrapper */
UserType userFunc;
};
} // namespace inotify
} // namespace dump
} // namespace phosphor
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