// setLogLevel sets the logging level for provided subsystem. Invalid
// subsystems are ignored. Uninitialized subsystems are dynamically created as
// needed.
func setLogLevel(subsystemID string, logLevel string) {
// Create the backend seelog logger if needed.
if backendLog == seelog.Disabled {
backendLog = newSeelogLogger()
}
// Ignore invalid subsystems.
logger, ok := subsystemLoggers[subsystemID]
if !ok {
return
}
// Default to info if the log level is invalid.
level, ok := btclog.LogLevelFromString(logLevel)
if !ok {
level = btclog.InfoLvl
}
// Create new logger for the subsystem if needed.
if logger == btclog.Disabled {
logger = btclog.NewSubsystemLogger(backendLog, subsystemID+": ")
useLogger(subsystemID, logger)
}
logger.SetLevel(level)
}
// SetLogWriter uses a specified io.Writer to output package logging info.
// This allows a caller to direct package logging output without needing a
// dependency on seelog. If the caller is also using btclog, UseLogger should
// be used instead.
func SetLogWriter(w io.Writer, level string) error {
if w == nil {
return errors.New("nil writer")
}
lvl, ok := btclog.LogLevelFromString(level)
if !ok {
return errors.New("invalid log level")
}
l, err := btclog.NewLoggerFromWriter(w, lvl)
if err != nil {
return err
}
UseLogger(l)
return nil
}