103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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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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//+build !windows
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package main
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import (
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"io"
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"io/ioutil"
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"os"
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"path"
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"syscall"
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"github.com/pulumi/pulumi/sdk/go/common/util/contract"
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"github.com/pulumi/pulumi/pkg/util/logging"
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)
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// Unix specific pipe implementation. Fairly simple as it sits on top of a pair of standard fifo
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// files that we can communicate over. Slightly complex as this involves extra cleanup steps to
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// ensure they're cleaned up when we're done.
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func createPipes() (pipes, error) {
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dir, err := ioutil.TempDir("", "pulumi-node-pipes")
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if err != nil {
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return nil, err
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}
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invokeReqPath, invokeResPath := path.Join(dir, "invoke_req"), path.Join(dir, "invoke_res")
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return &unixPipes{
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dir: dir,
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reqPath: invokeReqPath,
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resPath: invokeResPath,
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}, nil
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}
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type unixPipes struct {
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dir string
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reqPath, resPath string
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reqPipe, resPipe *os.File
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}
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func (p *unixPipes) directory() string {
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return p.dir
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}
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func (p *unixPipes) reader() io.Reader {
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return p.reqPipe
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}
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func (p *unixPipes) writer() io.Writer {
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return p.resPipe
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}
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func (p *unixPipes) connect() error {
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if err := syscall.Mkfifo(path.Join(p.dir, "invoke_req"), 0600); err != nil {
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logging.V(10).Infof("createPipes: Received error opening request pipe: %s\n", err)
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return err
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}
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if err := syscall.Mkfifo(path.Join(p.dir, "invoke_res"), 0600); err != nil {
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logging.V(10).Infof("createPipes: Received error opening result pipe: %s\n", err)
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return err
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}
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invokeReqPipe, err := os.OpenFile(p.reqPath, os.O_RDONLY, 0)
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if err != nil {
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return err
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}
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p.reqPipe = invokeReqPipe
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invokeResPipe, err := os.OpenFile(p.resPath, os.O_WRONLY, 0)
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if err != nil {
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return err
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}
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p.resPipe = invokeResPipe
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return nil
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}
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func (p *unixPipes) shutdown() {
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if p.reqPipe != nil {
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contract.IgnoreClose(p.reqPipe)
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contract.IgnoreError(os.Remove(p.reqPath))
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}
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if p.resPipe != nil {
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contract.IgnoreClose(p.resPipe)
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contract.IgnoreError(os.Remove(p.resPath))
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}
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contract.IgnoreError(os.Remove(p.dir))
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}
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