set default user based on current user (same default as most ssh clie…

…nts)

use filepath.Join rather than strings.Join for better os support

examples/goph/main.go

@@ -9,6 +9,8 @@ import (
  "log"
  "net"
  "os"
+ osuser "os/user"
+ "path/filepath"
  "strings"
  "time"
 
@@ -53,11 +55,16 @@ var (
 )
 
 func init() {
+ usr, err := osuser.Current()
+ if err != nil {
+ fmt.Println("couldn't determine current user. defaulting to 'root'")
+ usr.Username = "root"
+ }
 
  flag.StringVar(&addr, "ip", "127.0.0.1", "machine ip address.")
- flag.StringVar(&user, "user", "root", "ssh user.")
+ flag.StringVar(&user, "user", usr.Username, "ssh user.")
  flag.UintVar(&port, "port", 22, "ssh port number.")
- flag.StringVar(&key, "key", strings.Join([]string{os.Getenv("HOME"), ".ssh", "id_rsa"}, "/"), "private key path.")
+ flag.StringVar(&key, "key", filepath.Join(os.Getenv("HOME"), ".ssh", "id_rsa"), "private key path.")
  flag.StringVar(&cmd, "cmd", "", "command to run.")
  flag.BoolVar(&pass, "pass", false, "ask for ssh password instead of private key.")
  flag.BoolVar(&agent, "agent", false, "use ssh agent for authentication (unix systems only).")