如何将exec（）与输入参数一起使用？

How can I use exec with multiple argument in go? I've found an example of exec in go, but i don't understand how to use multiple args, this is what i've tried:

cmdName := os.Args[1]

cmdArgs := []string{os.Args[1:]}

cmd := exec.Command(cmdName, cmdArgs...)

Here is an example how to use exec with multiple arguments:

package main

import (
    "fmt"
    "log"
    "os"
    "os/exec"
)

func main() {
    args := os.Args[1:]

    fmt.Printf("%s
", args)

    res, err := exec.Command("ls", args...).Output()
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("%q
", string(res))
}

Without args:

echo -e $(go run args.go )
[] "args.go
file1
file2
file3
"

With -s and -r args:

echo -e $(go run args.go -s -r )
[-s -r] "total 4
0 file3
0 file2
0 file1
4 args.go
"