您有两种可能性。首先是使用ReadLine（），但这仅在应用程序输出为全行时才有效，并且您可以等待\
n。rm并非如此，因此您必须为Scanner开发一个自定义的SplitFunction
。可以在下面找到这两个版本。

请注意，您不能使用CombinedOutput，因为它不能被扫描。您必须使用管道。

package main

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

func main() {

    cmd := exec.Command("rm", "-i", "somefile.txt")

    // Stdout + stderr
    out, err := cmd.StderrPipe() // rm writes the prompt to err
    if err != nil {
        log.Fatal(err)
    }
    r := bufio.NewReader(out)

    // Stdin
    in, err := cmd.StdinPipe()
    if err != nil {
        log.Fatal(err)
    }
    defer in.Close()

    // Start the command!
    err = cmd.Start()
    if err != nil {
        log.Fatal(err)
    }

    line, _, err := r.ReadLine()

    for err != nil {
        if string(line) == "Remove file 'somefile.txt'?" {
            in.Write([]byte("y\n"))
        }
        line, _, err = r.ReadLine()
    }

    // program completes normally...s
}

这是扫描仪的第二个版本，它同时使用\ n和？作为行定界符：

package main

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

// Ugly hack, this is bufio.ScanLines with ? added as an other delimiter :D
func new_scanner(data []byte, atEOF bool) (advance int, token []byte, err error) {
    if atEOF && len(data) == 0 {
        return 0, nil, nil
    }
    if i := bytes.IndexByte(data, '\n'); i >= 0 {
        // We have a full newline-terminated line.
        fmt.Printf("nn\n")
        return i + 1, data[0:i], nil
    }
    if i := bytes.IndexByte(data, '?'); i >= 0 {
        // We have a full ?-terminated line.
        return i + 1, data[0:i], nil
    }
    // If we're at EOF, we have a final, non-terminated line. Return it.
    if atEOF {
        return len(data), data, nil
    }
    // Request more data.
    return 0, nil, nil
}

func main() {

    cmd := exec.Command("rm", "-i", "somefile.txt")

    // Stdout + stderr
    out, err := cmd.StderrPipe() // Again, rm writes prompts to stderr
    if err != nil {
        log.Fatal(err)
    }

    scanner := bufio.NewScanner(out)
    scanner.Split(new_scanner)

    // Stdin
    in, err := cmd.StdinPipe()
    if err != nil {
        log.Fatal(err)
    }
    defer in.Close()

    // Start the command!
    err = cmd.Start()
    if err != nil {
        log.Fatal(err)
    }

    // Start scanning
    for scanner.Scan() {
        line := scanner.Text()
        if line == "rm: remove regular empty file ‘somefile.txt’" {
            in.Write([]byte("y\n"))
        }
    }
    // Report scanner's errors
    if err := scanner.Err(); err != nil {
        log.Fatal(err)
    }

    // program completes normally...s
}