We've been investigating an issue [1] where, given a single attached screen session, "pkill -TERM screen" leaves the terminal in a broken state on macOS. Turns out that on macOS, pgrep/pkill match against argv[0], so the above command kills only the attacher process, not the forked server where argv[0]="SCREEN". Then we are in a broken state because two different processes are trying to read from the terminal.
I don't really know what the behavior should be but I guess it would be nice if there was a way to automatically detect/fix this case. We could automatically detach on SIGTERM as we do on SIGHUP (probably not worth the trouble though) Or perhaps there is a way to detect that two shells are racing to read from the terminal? [1]: https://github.com/fish-shell/fish-shell/issues/10717 Originally reported about "pkill -KILL" but whether we can/want to also fix that is another story.
