Bombabillo is a non-web client for the terminal, supporting Gopher, Gemini and much more. https://bombadillo.colorfield.space
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bombadillo/telnet/telnet.go

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/*
* Copyright (C) 2022 Brian Evans
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
// Package telnet provides a function that starts a telnet session in a subprocess.
package telnet
import (
"fmt"
"os"
"os/exec"
"tildegit.org/sloum/bombadillo/cui"
)
// StartSession starts a telnet session as a subprocess, connecting to the host
// and port specified. Telnet is run interactively as a subprocess until the
// process ends. It returns any errors from the telnet session.
func StartSession(host string, port string) (string, error) {
c := exec.Command("telnet", host, port)
c.Stdin = os.Stdin
c.Stdout = os.Stdout
c.Stderr = os.Stderr
// Clear the screen and position the cursor at the top left
fmt.Print("\033[2J\033[0;0H")
// Defer reset and reinit of the terminal to prevent any changes from
// telnet carrying over to the client (or beyond...)
defer func() {
cui.Tput("reset")
cui.InitTerm()
}()
err := c.Run()
if err != nil {
return "", fmt.Errorf("Telnet error response: %s", err.Error())
}
return "Telnet session terminated", nil
}