How to Execute Built-in Windows Commands Like 'del' in Golang?

Executing Windows Commands in Golang

When attempting to execute a simple Windows command such as "del c:aaa.txt" using "exec.Command", users may encounter an error indicating that the executable file cannot be found in the system path. This error occurs because certain commands, like "del," are built into the Windows command interpreter (cmd.exe) and do not have standalone executable files.

Solution

To execute these built-in commands in Golang, the following approach can be taken:

1. Cross-Platform Handling: Check the current operating system using runtime.GOOS.
2. Windows: For Windows systems, use exec.Command("cmd", "/C", command) to run the desired command through the command interpreter.
3. Mac/Linux: For Mac and Linux systems, execute the command directly using exec.Command("command").

Here's a modified code snippet that incorporates this solution:

package main

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

func main() {
    var c *exec.Cmd

    switch runtime.GOOS {
    case "windows":
        c = exec.Command("cmd", "/C", "del", "D:\a.txt")
    default:
        c = exec.Command("rm", "-f", "D:\a.txt")
    }

    if err := c.Run(); err != nil {
        fmt.Println("Error:", err)
    }
}

Using this approach, you will be able to execute Windows built-in commands successfully in Golang, even those without standalone executable files.

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