childprot/log.cpp

/*
 * log.cpp
 *
 *  Created on: 27.03.2013
 *      Copier: wn
 *
 *      I found this here:
 *      http://stackoverflow.com/questions/2638654/redirect-c-stdclog-to-syslog-on-unix
 */

#include <syslog.h>
#include <string.h>
#include <stdio.h>
#include <iostream>
#include "log.hpp"

Log::Log(std::string ident, int facility) {
    facility_ = facility;
    priority_ = LOG_DEBUG;
    strncpy(ident_, ident.c_str(), sizeof(ident_));
    ident_[sizeof(ident_)-1] = '\0';

    openlog(ident_, LOG_PID, facility_);
}

int Log::sync() {
    if (buffer_.length()) {
        syslog(priority_, "%s", buffer_.c_str());
        buffer_.erase();
        priority_ = LOG_DEBUG; // default to debug for each message
    }
    return 0;
}

int Log::overflow(int c) {
    if (c != EOF) {
        buffer_ += static_cast<char>(c);
    } else {
        sync();
    }
    return c;
}

std::ostream& operator<< (std::ostream& os, const LogPriority& log_priority) {
    static_cast<Log *>(os.rdbuf())->priority_ = (int)log_priority;
    return os;
}