#include <stdarg.h>
#include <stdio.h>
#include <syslog.h>
#include <errno.h>
#include <string.h>

/* Note, on my machine strerror_r does not return int nor does it
 *  fill the passed-in buffer, so I had to use strerror();
 */

void log_debug(const char* fmt, ...)
{
   va_list ap;
   va_start (ap, fmt);
   vfprintf(stdout, fmt, ap);
   fprintf(stdout, "\n");
   vsyslog(LOG_DEBUG, fmt, ap);
   va_end(ap);
}

void log_info(const char* fmt, ...)
{
   va_list ap;
   va_start (ap, fmt);
   vfprintf(stdout, fmt, ap);
   fprintf(stdout, "\n");
   vsyslog(LOG_INFO, fmt, ap);
   va_end(ap);
}

void log_errno(const char* fmt, ...)
{
   va_list ap;

   va_start (ap, fmt);
   vfprintf(stderr, fmt, ap);
   vsyslog(LOG_ERR, fmt, ap);
   va_end(ap);

   char* error_buf = strerror(errno);
   syslog(LOG_ERR, error_buf);
   fprintf(stderr, ": ");
   fprintf(stderr, error_buf);
   fprintf(stderr, "\n");
}

void log_error(const char* fmt, ...)
{
   va_list ap;
   va_start (ap, fmt);
   vfprintf(stderr, fmt, ap);
   fprintf(stderr, "\n");
   vsyslog(LOG_ERR, fmt, ap);
   va_end(ap);
}

void log_hack(const char* fmt, ...)
{
   va_list ap;
   va_start (ap, fmt);
   vfprintf(stderr, fmt, ap);
   fprintf(stderr, "\n");
   vsyslog(LOG_ALERT, fmt, ap);
   va_end(ap);
}

-- MattWalsh - 08 Mar 2006