#include <sys/types.h> // pid_t
#include <unistd.h> // getpid

#include <cerrno>
#include <cstring>
#include <fstream>

#include "pidfile.h"
#include "logger.h"

using SSMD::PIDFile;

PIDFile::PIDFile()
    : fileName("/var/run/ssmd.pid")
{
    _create();
}

PIDFile::PIDFile(const std::string & file)
    : fileName(file)
{
    _create();
}

PIDFile::~PIDFile()
{
    if (unlink(fileName.c_str())) {
        logger << "Failed to unlink pid-file: " << strerror(errno) << std::endl;
        return;
    }
}

void PIDFile::_create()
{
    std::ofstream file(fileName.c_str());

    if (!file.is_open()) {
        logger << "Failed to create pid-file: " << strerror(errno) << std::endl;
        return;
    }

    pid_t pid = getpid();
    file << pid;
    logger << "PID: " << pid << std::endl;
}