text: /* $OpenBSD: log.h,v 1.22 2017/05/17 01:24:17 djm Exp $ */
  
  /*
   * Author: Tatu Ylonen <ylo@cs.hut.fi>
   * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
   *                    All rights reserved
   *
   * As far as I am concerned, the code I have written for this software
   * can be used freely for any purpose.  Any derived versions of this
   * software must be clearly marked as such, and if the derived work is
   * incompatible with the protocol description in the RFC file, it must be
   * called by a name other than "ssh" or "Secure Shell".
   */
  
  #ifndef SSH_LOG_H
  #define SSH_LOG_H
  
  /* Supported syslog facilities and levels. */
  typedef enum {
  	SYSLOG_FACILITY_DAEMON,
  	SYSLOG_FACILITY_USER,
  	SYSLOG_FACILITY_AUTH,
  #ifdef LOG_AUTHPRIV
  	SYSLOG_FACILITY_AUTHPRIV,
  #endif
  	SYSLOG_FACILITY_LOCAL0,
  	SYSLOG_FACILITY_LOCAL1,
  	SYSLOG_FACILITY_LOCAL2,
  	SYSLOG_FACILITY_LOCAL3,
  	SYSLOG_FACILITY_LOCAL4,
  	SYSLOG_FACILITY_LOCAL5,
  	SYSLOG_FACILITY_LOCAL6,
  	SYSLOG_FACILITY_LOCAL7,
  	SYSLOG_FACILITY_NOT_SET = -1
  }       SyslogFacility;
  
  typedef enum {
  	SYSLOG_LEVEL_QUIET,
  	SYSLOG_LEVEL_FATAL,
  	SYSLOG_LEVEL_ERROR,
  	SYSLOG_LEVEL_INFO,
  	SYSLOG_LEVEL_VERBOSE,
  	SYSLOG_LEVEL_DEBUG1,
  	SYSLOG_LEVEL_DEBUG2,
  	SYSLOG_LEVEL_DEBUG3,
  	SYSLOG_LEVEL_NOT_SET = -1
  }       LogLevel;
  
  typedef void (log_handler_fn)(LogLevel, const char *, void *);
  
  void     log_init(char *, LogLevel, SyslogFacility, int);
  int      log_change_level(LogLevel);
  int      log_is_on_stderr(void);
  void     log_redirect_stderr_to(const char *);
  
  SyslogFacility	log_facility_number(char *);
  const char * 	log_facility_name(SyslogFacility);
  LogLevel	log_level_number(char *);
  const char *	log_level_name(LogLevel);
  
  void     fatal(const char *, ...) __attribute__((noreturn))
      __attribute__((format(printf, 1, 2)));
  void     error(const char *, ...) __attribute__((format(printf, 1, 2)));
  void     sigdie(const char *, ...)  __attribute__((noreturn))
      __attribute__((format(printf, 1, 2)));
  void     logdie(const char *, ...) __attribute__((noreturn))
      __attribute__((format(printf, 1, 2)));
  void     logit(const char *, ...) __attribute__((format(printf, 1, 2)));
  void     verbose(const char *, ...) __attribute__((format(printf, 1, 2)));
  void     debug(const char *, ...) __attribute__((format(printf, 1, 2)));
  void     debug2(const char *, ...) __attribute__((format(printf, 1, 2)));
  void     debug3(const char *, ...) __attribute__((format(printf, 1, 2)));
  
  
  void	 set_log_handler(log_handler_fn *, void *);
  void	 do_log2(LogLevel, const char *, ...)
      __attribute__((format(printf, 2, 3)));
  void	 do_log(LogLevel, const char *, va_list);
  void	 cleanup_exit(int) __attribute__((noreturn));
  #endif
  