liblog

A basic logging library

Types

• The different types of logging severity

  typedef enum { 
      LOG_DEBUG, 
      LOG_INFO, 
      LOG_WARN, 
      LOG_ERROR 
  } log_level_t;
  

Functions

• Sets up the logging library. If not called, file is set to /log/unknown.log, and level is set to LOG_INFO

  void log_init(const char* file, const log_level_t level);
  

• Writes a formatted string, along with timestamp and colour-coded log level

  void log_console_level(log_level_t level, const char *fmt, ...);
  

Macros

• Wrappers for log_console_level(), automatically inputting the correct log level

  #define log_debug(fmt, ...) log_console_level(LOG_DEBUG, fmt, ##__VA_ARGS__)
  #define log_info(fmt, ...)  log_console_level(LOG_INFO, fmt, ##__VA_ARGS__)
  #define log_warn(fmt, ...)  log_console_level(LOG_WARN, fmt, ##__VA_ARGS__)
  #define log_error(fmt, ...) log_console_level(LOG_ERROR, fmt, ##__VA_ARGS__)
  

• Wrapper for log_error, formatted like perror()

  #define log_perror(err) log_console_level(LOG_ERROR, "%s: %s\n", err, strerror(errno))
  

Variables

• Current set minimum level to log. If you attempt to log using a level lower than this, it is ignored.

  extern int loglevel;
  

• Current set outputted logging file.

  extern char* logfile;