I wanted to trace down the system call used by ssh to output this warning message:> ssh root@abcdeThe authenticity of host .. can't be established.If the message were sent to stderr or stdout, there would definitely be a system call trace showing ssh write() to stderr/stdout.However, there is none.So how does SSH show the warning message on terminal? Does SSH directly manipulate terminal device to display the message, without interacting with stderr/stdout?
How does SSH display the message The authenticity of host .. can't be established?
ssh;command line;terminal;io redirection