GetPortsList causes the existing serial console on Linux to become unresponsive.

[iLiQi]

Describe the problem

Even if I close PuTTY and reopen it, the problem cannot be resolved. I can only perform a reboot.

To reproduce

1. Connect a Windows computer to a Linux server using a CH340 USB serial cable via PuTTY.
2. Run this code

package main

import (
	"log"
	"go.bug.st/serial"
)

func main() {
	ports, err := serial.GetPortsList()
	log.Println("Available serial ports: ", ports)
	if err != nil {
		log.Fatal(err)
	}
}

3. The opened PuTTY terminal cannot input or output.

Please double-check that you have reported each of the following

before submitting the issue.

• I've provided the FULL source code that causes the problem
• I've provided all the actions required to reproduce the problem

Expected behavior

when serial.GetPortsList is called, it should not affect the already open terminals.

Operating system and version

Centos 9

Please describe your hardware setup

normal x86

Additional context

No response

Issue checklist

• I searched for previous requests in the issue tracker
• My request contains all necessary details

[iLiQi]

[svaygame]

The problem occurs on the ttyS* device.

[at serial_unix.go:313]

		// Check if serial port is real or is a placeholder serial port "ttySxx" or "ttyHSxx"
		if strings.HasPrefix(f.Name(), "ttyS") || strings.HasPrefix(f.Name(), "ttyHS") {
			port, err := nativeOpen(portName, &Mode{})  // <- Setting will be changed
			if err != nil {
				continue
			} else {
				port.Close()
			}
		}

When serial.GetPortsList() is called, the settings of devices already in use will be changed to default values.
They will become unusable due to the configuration change.

For example, the baud rate will change from 115200 back to 9600.