How to Retrieve System Command Output in Go?

Retrieving System Command Output in Go

In Go, executing system commands and capturing their output can be achieved with various packages and approaches. This article delves into a straightforward method using the exec package.

The exec package provides a convenient way to fork processes and retrieve their output. Here's a sample code snippet:

package main

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

func main() {
    out, err := exec.Command("date").Output()
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("The date is %s\n", out)
}

In this example:

• exec.Command("date") creates a command object to run the date command.
• Output() method executes the command and captures its standard output as a byte slice ([]byte) in the out variable.
• We can convert the out slice to a string for readability using string(out).

The exec.Command also offers another method, CombinedOutput(), which combines standard output and standard error into a single byte slice, allowing you to handle both at once.

By employing the Output() or CombinedOutput() methods, you can effortlessly capture the output of arbitrary system commands within your Go programs.

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