text: /*-
   * Copyright (c) 2012-2014 UPLEX Nils Goroll Systemoptimierung
   * Copyright (c) 2012-2014 Otto Gmbh & Co KG
   * All rights reserved
   * Use only with permission
   *
   * Author: Geoffrey Simmons <geoffrey.simmons@uplex.de>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   */
  
  #include <syslog.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <stdarg.h>
  #include <strings.h>
  #include <string.h>
  #include <ctype.h>
  
  #include "trackrdrd.h"
  
  static const char *level2name[LOG_DEBUG+1];
  
  static void
  syslog_setlevel(int level)
  {
      logconf.level = level;
      setlogmask(LOG_UPTO(level));
  }
  
  /* XXX: is this safe? */
  static void
  stdio_initnames(void)
  {
      level2name[LOG_EMERG]	= "EMERG";
      level2name[LOG_ALERT]	= "ALERT";
      level2name[LOG_CRIT]	= "CRIT";
      level2name[LOG_ERR]		= "ERR";
      level2name[LOG_WARNING]	= "WARNING";
      level2name[LOG_NOTICE]	= "NOTICE";
      level2name[LOG_INFO]	= "INFO";
      level2name[LOG_DEBUG]	= "DEBUG";
  }
  
  static void
  stdio_log(int level, const char *msg, ...)
  {
      va_list ap;
      
      if (level > logconf.level)
          return;
      flockfile(logconf.out);
      fprintf(logconf.out, "%s: ", level2name[level]);
      va_start(ap, msg);
      (void) vfprintf(logconf.out, msg, ap);
      va_end(ap);
      fprintf(logconf.out, "\n");
      funlockfile(logconf.out);
      fflush(logconf.out);
  }
  
  static void
  stdio_setlevel(int level)
  {
      logconf.level = level;
  }
  
  static void
  stdio_close(void)
  {
      fclose(logconf.out);
  }
  
  int LOG_Open(const char *progname)
  {
      if (EMPTY(config.log_file)) {
          /* syslog */
          logconf.log = syslog;
          logconf.setlevel = syslog_setlevel;
          logconf.close = closelog;
          openlog(progname, LOG_PID | LOG_CONS | LOG_NDELAY | LOG_NOWAIT,
                  config.syslog_facility);
          logconf.level = LOG_INFO;
          setlogmask(LOG_UPTO(LOG_INFO));
          atexit(closelog);
          return(0);
      }
  
      if (strcmp(config.log_file, "-") == 0)
          logconf.out = stdout;
      else {
          logconf.out = fopen(config.log_file, "a");
          if (logconf.out == NULL) {
              perror(config.log_file);
              return(-1);
          }
      }
      logconf.level = LOG_INFO;
      logconf.log = stdio_log;
      logconf.setlevel = stdio_setlevel;
      logconf.close = stdio_close;
      stdio_initnames();
      
      return(0);
  }
  
  int
  LOG_GetLevel(void)
  {
      return logconf.level;
  }
  