Showing GNU screen session name and window title in shell prompt

Question

Is there a way to present the GNU Screen session name and window title in the prompt of the shell (let us say, the Bash prompt defined by PS1)?

Answer 1

Screen supplies some environment variables (from screen(1) manpage):

STY              Alternate socket name.
WINDOW           Window number of a window (at creation time).

The "at creation time" means that if you renumber a window (using screen's number command), the shell will not be told about the change and $WINDOW will still be the same as the first window number.

You could use something like:

PS1='\u@\h(${STY}:${WINDOW}):\w$ '