Source: sshagent.go in package github.com/xanzy/ssh-agent

Copyright 2015, Sander van Harmelen 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.

+build !windows


package sshagent

import (
	"errors"
	"fmt"
	"net"
	"os"

	"golang.org/x/crypto/ssh/agent"
)

New returns a new agent.Agent that uses a unix socket

func New() (agent.Agent, net.Conn, error) {
	if !Available() {
		return nil, nil, errors.New("SSH agent requested but SSH_AUTH_SOCK not-specified")
	}

	sshAuthSock := os.Getenv("SSH_AUTH_SOCK")

	conn, err := net.Dial("unix", sshAuthSock)
	if err != nil {
		return nil, nil, fmt.Errorf("Error connecting to SSH_AUTH_SOCK: %v", err)
	}

	return agent.NewClient(conn), conn, nil
}

Available returns true is a auth socket is defined

func Available() bool {
	return os.Getenv("SSH_AUTH_SOCK") != ""