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package main
import (
"encoding/json"
"io/ioutil"
"log"
"os"
"path/filepath"
"strconv"
"github.com/docker/libcontainer"
)
func loadContainer() (*libcontainer.Container, error) {
f, err := os.Open(filepath.Join(dataPath, "container.json"))
if err != nil {
return nil, err
}
defer f.Close()
var container *libcontainer.Container
if err := json.NewDecoder(f).Decode(&container); err != nil {
return nil, err
}
return container, nil
}
func readPid() (int, error) {
data, err := ioutil.ReadFile(filepath.Join(dataPath, "pid"))
if err != nil {
return -1, err
}
pid, err := strconv.Atoi(string(data))
if err != nil {
return -1, err
}
return pid, nil
}
func openLog(name string) error {
f, err := os.OpenFile(name, os.O_CREATE|os.O_RDWR|os.O_APPEND, 0755)
if err != nil {
return err
}
log.SetOutput(f)
return nil
}
func loadContainerFromJson(rawData string) (*libcontainer.Container, error) {
var container *libcontainer.Container
if err := json.Unmarshal([]byte(rawData), &container); err != nil {
return nil, err
}
return container, nil
}
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