如何检查套接字是否在监听

Question

I need to know if a unix socket (specifically redis socket) is listening using GoLang in an Ubuntu machine. The only way I thought to do this is parsing the

netstat --listen

command output. Is there any other way?

Answer 1

You could give a try to net.Dial, for example:

https://play.golang.org/p/DIsPzOmWqED

package main

import (
    "fmt"
    "log"
    "net"
    "path/filepath"
)

func main() {
    l, err := net.Dial("unix", filepath.Join("/tmp", "my.sock"))
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("l = %+v
", l)
}

If socket is not "listening" you may get an error like this:

2019/08/19 10:20:38 dial unix /tmp/my.sock: connect: connection refused
exit status 1