60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
// Copyright 2016 CNI authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package invoke
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"os/exec"
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"github.com/containernetworking/cni/pkg/types"
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)
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type RawExec struct {
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Stderr io.Writer
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}
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func (e *RawExec) ExecPlugin(pluginPath string, stdinData []byte, environ []string) ([]byte, error) {
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stdout := &bytes.Buffer{}
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c := exec.Cmd{
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Env: environ,
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Path: pluginPath,
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Args: []string{pluginPath},
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Stdin: bytes.NewBuffer(stdinData),
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Stdout: stdout,
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Stderr: e.Stderr,
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}
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if err := c.Run(); err != nil {
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return nil, pluginErr(err, stdout.Bytes())
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}
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return stdout.Bytes(), nil
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}
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func pluginErr(err error, output []byte) error {
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if _, ok := err.(*exec.ExitError); ok {
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emsg := types.Error{}
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if perr := json.Unmarshal(output, &emsg); perr != nil {
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emsg.Msg = fmt.Sprintf("netplugin failed but error parsing its diagnostic message %q: %v", string(output), perr)
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}
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return &emsg
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}
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return err
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}
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