in klog.go [369:398]
func (t *traceLocation) Set(value string) error {
if value == "" {
// Unset.
logging.mu.Lock()
defer logging.mu.Unlock()
t.line = 0
t.file = ""
return nil
}
fields := strings.Split(value, ":")
if len(fields) != 2 {
return errTraceSyntax
}
file, line := fields[0], fields[1]
if !strings.Contains(file, ".") {
return errTraceSyntax
}
v, err := strconv.Atoi(line)
if err != nil {
return errTraceSyntax
}
if v <= 0 {
return errors.New("negative or zero value for level")
}
logging.mu.Lock()
defer logging.mu.Unlock()
t.line = v
t.file = file
return nil
}