Prevent get_terminal_size() from errors while buffering:

Hia:3 Nice project...

I was testing your script and I noticed something: Suppose we're about to pipe your script to grep , to get only the open ports:

┌──(user㉿dhcppc4)-[~/Desktop/TCP_SP/PortScanner]
└─$ python3 __main__.py --hostname 127.0.0.1 | grep -i open

It'll cause following errors:

Traceback (most recent call last):
  File "/home/user/Desktop/TCP_SP/PortScanner/__main__.py", line 18, in <module>
    wt, ht = get_terminal_size()
OSError: [Errno 25] Inappropriate ioctl for device

Or suppose we're about to pipe the result buffer to a file:

┌──(user㉿dhcppc4)-[~/Desktop/TCP_SP/PortScanner]
└─$ python3 __main__.py --hostname 127.0.0.1 >> result 

Same problem goes here:

Traceback (most recent call last):
  File "/home/user/Desktop/TCP_SP/PortScanner/__main__.py", line 18, in <module>
    wt, ht = get_terminal_size()
OSError: [Errno 25] Inappropriate ioctl for device

If the terminal is buffered, get_terminal_size() will trigger [Errno 25] Inappropriate ioctl for device because OS has no way of getting rows and columns of a Simulated Terminal.

So, we put it in Try-Catch , and we use Unix standard terminal size which is : 80 columns by 24 rows

If so:

┌──(user㉿dhcppc4)-[~/Desktop/TCP_SP/PortScanner]
└─$ python3 __main__.py --hostname 127.0.0.1 | grep -i open
        Port 631                                                   open         
        Port 1716                                                  open         
        Port 33272                                                 open         
        Port 48878                                                 open         
        Port 59068                                                 open         
                                                                                                                                                           
┌──(user㉿dhcppc4)-[~/Desktop/TCP_SP/PortScanner]
└─$ python3 __main__.py --hostname 127.0.0.1 >> result     
                                                                                                                                                           
┌──(user㉿dhcppc4)-[~/Desktop/TCP_SP/PortScanner]
└─$