#include <syslog.h>
#include <stdarg.h>
#include <libgen.h>

int
main(int argc, char** argv)
{
    openlog(basename(argv[0]), 0, LOG_USER);
    syslog(LOG_WARNING, "Warning message without process ID.");
    closelog();
    openlog(basename(argv[0]), LOG_PID, LOG_USER);
    syslog(LOG_WARNING, "Warning message with process ID.");
    closelog();
    return 0;
}