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cmd.go
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cmd.go
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// Copyright 2016 CNI authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package testutils
import (
"encoding/json"
"io/ioutil"
"os"
"github.com/containernetworking/cni/pkg/types"
)
func envCleanup() {
os.Unsetenv("CNI_COMMAND")
os.Unsetenv("CNI_PATH")
os.Unsetenv("CNI_NETNS")
os.Unsetenv("CNI_IFNAME")
}
func CmdAddWithResult(cniNetns, cniIfname string, f func() error) (*types.Result, error) {
os.Setenv("CNI_COMMAND", "ADD")
os.Setenv("CNI_PATH", os.Getenv("PATH"))
os.Setenv("CNI_NETNS", cniNetns)
os.Setenv("CNI_IFNAME", cniIfname)
defer envCleanup()
// Redirect stdout to capture plugin result
oldStdout := os.Stdout
r, w, err := os.Pipe()
if err != nil {
return nil, err
}
os.Stdout = w
err = f()
w.Close()
if err != nil {
return nil, err
}
// parse the result
out, err := ioutil.ReadAll(r)
os.Stdout = oldStdout
if err != nil {
return nil, err
}
result := types.Result{}
err = json.Unmarshal(out, &result)
if err != nil {
return nil, err
}
return &result, nil
}
func CmdDelWithResult(cniNetns, cniIfname string, f func() error) error {
os.Setenv("CNI_COMMAND", "DEL")
os.Setenv("CNI_PATH", os.Getenv("PATH"))
os.Setenv("CNI_NETNS", cniNetns)
os.Setenv("CNI_IFNAME", cniIfname)
defer envCleanup()
return f()
}