How to Get Terminal Size in Go?

Getting Terminal Size in Go

In Go, determining the size of the current terminal can be challenging. One common approach involves executing the stty size command, but this may not always be effective due to process isolation issues.

To resolve this issue, the terminal package within the ssh package provides a convenient solution. The GetSize method allows you to easily retrieve the terminal size for a given file descriptor:

package main

import (
    "golang.org/x/crypto/ssh/terminal"
    "log"
    "os"
)

func main() {
    width, height, err := terminal.GetSize(int(os.Stdin.Fd()))
    if err != nil {
        log.Fatal(err)
    }

    log.Printf("Terminal width: %d, height: %d", width, height)
}

The file descriptor of the terminal is typically obtained using os.Stdin.Fd(), which returns an integer representing the current standard input (which is the terminal).

By utilizing the GetSize method, you can accurately determine the size of the terminal, allowing you to implement terminal-aware applications in Go.

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