func (self *JujuLogStore) ReadLog(service string, unitId int) (*JujuLog, error) {
// TODO: Block path traversal
filename := "unit-" + service + "-" + strconv.Itoa(unitId) + ".log"
path := path.Join(self.BaseDir, filename)
ok, err := files.Exists(path)
if err != nil {
return nil, err
}
if !ok {
log.Debug("Log file not found: %v", path)
return nil, nil
}
log := &JujuLog{}
log.path = path
return log, nil
}
func (self *Client) GetLogStore() (*JujuLogStore, error) {
// TODO: Cache?
// TODO: SSH?
baseDir := "/var/log/juju/"
exists, err := files.Exists(baseDir)
if err != nil {
log.Warn("Error checking if /var/log/juju exists", err)
return nil, err
}
logStore := &JujuLogStore{}
if exists {
logStore.BaseDir = baseDir
return logStore, nil
}
// LXC looks like /var/log/juju-<username>-local/
dirs, err := ioutil.ReadDir("/var/log")
if err != nil {
log.Warn("Error listing contents of /var/log", err)
return nil, err
}
for _, dir := range dirs {
if !dir.IsDir() {
continue
}
name := dir.Name()
if strings.HasPrefix(name, "juju-") && strings.HasSuffix(name, "-local") {
logStore.BaseDir = filepath.Join("/var/log", name)
return logStore, nil
}
}
return nil, errors.New("Unable to find juju log store")
}
func (self *FileByteSource) Exists() (bool, error) {
return files.Exists(self.path)
}