log.cpp

#include <syslog.h>
#include <iostream>
#include <stdlib.h>

using namespace std;
int main(int argc, char *argv[])
{
    int stuff = 0;
    if (argc != 3 && argc != 4) {
        cout << "Usage: log <priority> <prog> <line>" << endl;
        return -1;
    }
    setlogmask (LOG_UPTO (LOG_DEBUG));
    openlog (argv[2], LOG_CONS | LOG_NDELAY, /*atoi (argv[2]) * 8*/ LOG_LOCAL1);

    if (argc == 4) {
        syslog(atoi(argv[1]), argv[3]);  // argv[4]
    } else {
        string line;
        while (getline(cin, line)) {
            syslog(atoi(argv[1]), line.c_str());
        }
    }

    closelog();

    return 0;
}
// compile with g++ -o log log.cpp
// chmod +x log
// ./log