How Can I Get the Terminal Size in Go?

Getting Terminal Size in Go

To obtain the size of a terminal in Go, you can take the following steps:

One way to achieve this is by using the exec package:

package main

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

func main() {
    out, err := exec.Command("stty", "size").Output()
    if err != nil {
        log.Fatal(err)
    }

    fmt.Printf("out: %s", out)
}

However, the code above may encounter an error related to spawning a process not associated with the current terminal. To address this, you can consider integrating the stty command with the current terminal.

Alternatively, you can utilize the terminal package within the golang.org/x/crypto/ssh package to easily obtain the size of a terminal:

package main

import (
    "fmt"

    "golang.org/x/crypto/ssh/terminal"
)

func main() {
    width, height, err := terminal.GetSize(int(os.Stdin.Fd()))
    if err != nil {
        fmt.Printf("Error: %s", err)
    }

    fmt.Printf("Width: %d, Height: %d", width, height)
}

This method employs a syscall to obtain the terminal size for the specified file descriptor, offering a more tailored solution for obtaining terminal size information.

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