How to use variables in os/exec in GO?

Question

Just started to learn GO. Need to add rule into iptables. Thats how i read ip from client

  func get_client_ip(w http.ResponseWriter, r *http.Request) {

  ip,_,_ := net.SplitHostPort(r.RemoteAddr)
   }

I need use "ip" variable here

cmd := exec.Command("iptables", "-I INPUT -s ip -j ACCEPT")

What is the right way to use variables in os/exec ?

user5728991 · Accepted Answer · 2018-02-09 03:18:16Z

2

Command arguments map one to one with function arguments to exec.Command. Do it like this:

cmd := exec.Command("iptables", "-I", "INPUT", "-s", ip, "-j", "ACCEPT")

The code in the question passes "-I INPUT -s ip -j ACCEPT" as a single argument to the command. That's not what you want.

answered Feb 9, 2018 at 3:18

user5728991

Sign up to request clarification or add additional context in comments.

1 Answer 1