Golang exec.Command - 对话框

Question

Go 程序运行带有参数的外部 soft.exe:

cmd := exec.Command("soft.exe", "-text")
out, _ := cmd.CombinedOutput()

fmt.Printf("%s", out)

soft.exe文件有一些输出和等待输入的值，例如:

Please choose code: 1, 2, 3, 4

通常在 shell 窗口中，我只需键入“1”并按 Enter，soft.exe 就会给我结果。

Thank you, your code is [some number]

如何在运行后填充“1”并使用 Go 语言获取输出？在我的示例中，运行 soft.exe 后它会立即完成“请选择代码:1、2、3、4”的工作。

Answer 1

您需要将 os.Stdin 重定向到 cmd.Stdin，将 os.Stdout 重定向到 cmd.Stdout

在 godoc 中查看:https://golang.org/pkg/os/exec/#Cmd

   // Stdin specifies the process's standard input.
   //
   // If Stdin is nil, the process reads from the null device (os.DevNull).
   //
   // If Stdin is an *os.File, the process's standard input is connected
   // directly to that file.
   //
   // Otherwise, during the execution of the command a separate
   // goroutine reads from Stdin and delivers that data to the command
   // over a pipe. In this case, Wait does not complete until the goroutine
   // stops copying, either because it has reached the end of Stdin
   // (EOF or a read error) or because writing to the pipe returned an error.
   Stdin io.Reader

此示例已在 Windows 上进行测试。

package main

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

func main() {
    cmd := exec.Command("yo")
    cmd.Stderr = os.Stderr
    cmd.Stdout = os.Stdout
    cmd.Stdin = os.Stdin
    if err := cmd.Run(); err != nil {
        fmt.Println(err.Error())
        os.Exit(1)
    }

}