nodejs close other applications

This article will introduce how to use Node.js to close other applications. In practical applications, such functions may be used to protect system security, manage the operating status of the system, or for various other reasons. In Node.js, you can execute external programs by using the exec method of the child_process module. Of course, when performing such operations, special attention needs to be paid to considering and evaluating the security of the system to avoid unnecessary problems.

Step 1: Introduce the child_process module
In Node.js, you can execute system commands by introducing the child_process module. You can add the following code at the beginning of the code:

const { exec } = require('child_process');

Step 2: Find the process ID that needs to be closed
Before executing the operation of closing other programs, you need to obtain the process IDs of these programs. You can list all processes running in the current system by executing the "ps -A" command. In Linux systems, each process has a unique process ID (PID). We can perform the shutdown operation by finding the PID corresponding to the program name. You can use the following code to find the PID of a process:

exec('pidof <AppName>', (err, stdout, stderr) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(stdout);
});

In the above code, "" indicates the name of the program that needs to be found. When this command is executed, the output will be the process ID of the program. When the program does not exist, the output will be an empty string.

Step 3: Close other programs
After we obtain the PID of the program that needs to be closed, we can execute the "kill PID" command to close it. In the Linux system, you can use the following code to shut down the process with the specified PID:

exec('kill <PID>', (err, stdout, stderr) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(stdout);
});

In the above code, "" indicates the process ID of the program that needs to be shut down. When this command is executed, the output will be an empty string. After the execution is completed, if you need to perform the previous steps again to continue closing other processes, you can use recursion or looping to achieve this.

Step 4: Complete sample code

const { exec } = require('child_process');

const closeApp = (appName) => {
  exec(`pidof ${appName}`, (err, stdout, stderr) => {
    if (err) {
      console.error(err);
      return;
    }
    // 当前程序的PID
    const curPID = process.pid;
    // 查找到的所有程序PID数组
    const pidList = stdout
      .split('
')
      .filter((pid) => pid && pid !== String(curPID));
    if (pidList.length > 0) {
      pidList.forEach((pid) => {
        exec(`kill ${pid}`, (err, stdout, stderr) => {
          if (err) {
            console.error(err);
            return;
          }
          console.log(`${pid} is killed`);
        });
      });
    } else {
      console.log(`No ${appName} process is found`);
    }
  });
};

// 以Chrome浏览器为例进行测试
closeApp('chrome');

In the above code, we use the closeApp function to perform the operation of closing other programs. When looking for the PID of the program that needs to be closed, we also specifically determine the PID of the current program to avoid accidentally closing the current process. After finding the PID of the program that needs to be closed, we use forEach to traverse the PID list and then perform the shutdown operation one by one.

The above is how to use Node.js to close other applications. Of course, in actual applications, more details and security issues need to be considered. We hope that readers can undergo sufficient security assessment and testing before the code is executed to ensure the correctness and reliability of the program.

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