[Bug tui/18215] New: need to save/reset/restore tty settings when popping into a shell from tui mode

["dje at google dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18215

            Bug ID: 18215
           Summary: need to save/reset/restore tty settings when popping
                    into a shell from tui mode
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tui
          Assignee: unassigned at sourceware dot org
          Reporter: dje at google dot com

I happened to try "shell" in tui, and noticed the tty settings are all wrong.
gdb needs to restore the original tty settings when going into shell mode,
and switch back to curses mode afterwards.

I can imagine wanting to pop into a shell while leaving curses intact
-> can we have an option to run the shell in a pty?

And how about a pony?

[This came up on IRC where a user noted that inferior output interferes with
curses. We need a mode to run inferiors in their own pty. I had the beginnings
of a patch, but need more roundtuits.]

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