weaveworks/procspy

Go methods to list TCP connections and the owning processes.

Go module to list all TCP connections, with an option to try to find the owning PID and processname.

Works by reading /proc directly on Linux, and by executing netstat and lsof -i on Darwin.

Works for IPv4 and IPv6 TCP connections. Only established connections are listed; ports where something is only listening or TIME_WAITs are skipped.

If you want to find all processes you'll need to run this as root.

Status:

Tested on Linux and Darwin (10.9).

Install:

go install

Usage:

Only list the connections:

cs, err := procspy.Connections(false)
for c := cs.Next(); c != nil; c = cs.Next() {
    ...
}

List the connections and try to find the owning process:

cs, err := procspy.Connections(true)
for c := cs.Next(); c != nil; c = cs.Next() {
    ...
}

(See ./example_test.go)

package main

import (
	"fmt"

	"github.com/weaveworks/procspy"
)

func main() {
	lookupProcesses := true
	cs, err := procspy.Connections(lookupProcesses)
	if err != nil {
		panic(err)
	}

	fmt.Printf("TCP Connections:\n")
	for c := cs.Next(); c != nil; c = cs.Next() {
		fmt.Printf(" - %v\n", c)
	}
}