如何在 Go 中以不同使用者身分執行外部命令？

import (
    "os/exec"
    "syscall"
)

func main() {
    // Get the user ID and group ID for the desired user.
    u, err := user.Lookup("username")
    if err != nil {
        fmt.Printf("%v", err)
        return
    }

    uid, err := strconv.Atoi(u.Uid)
    if err != nil {
        fmt.Printf("%v", err)
        return
    }

    gid, err := strconv.Atoi(u.Gid)
    if err != nil {
        fmt.Printf("%v", err)
        return
    }

    // Create the command object.
    cmd := exec.Command("command", "args...")

    // Set the SysProcAttr field to specify the user credentials.
    cmd.SysProcAttr = &syscall.SysProcAttr{
        Credential: &syscall.Credential{
            Uid: uint32(uid),
            Gid: uint32(gid),
        },
    }

    // Execute the command.
    if err := cmd.Run(); err != nil {
        fmt.Printf("%v", err)
        return
    }
}