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 mainimport ( "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("yn")) } 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 mainimport ( "bufio" "bytes" "fmt" "log" "os/exec")// Ugly hack, this is bufio.ScanLines with ? added as an other delimiter :Dfunc 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("nnn") 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("yn")) } } // Report scanner's errors if err := scanner.Err(); err != nil { log.Fatal(err) } // program completes normally...s}
