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lacrosse1991
Asked: 2013-09-05 12:46:12 +0800 CST

Can I make gnu screen display a message to a user when they attach to a screen session

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I was wondering if there is a way to make screen display a message to a user when they attach to a screen session? For instance, if it is preferred that a user does not use a shared screen session for their personal activities "Please do not use this session for personal activities" could be displayed when the user attaches to the screen. I have tried putting an echo command in my screenrc file, but it did not result in anything being displayed (see below).

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Thanks for your help, it is much appreciated!

debian

1 Answers

  1. Well, that's not the way echo works, but there are at least two ways to show mot-style notifications under screen:

    • Screen will set $TERM to "screen", so you can check its value in the shell startup file, e.g. ~/.bashrc (or /etc/bashrc)
      if [ "x$TERM" == "xscreen" ];
          echo "Please do not use this session for personal activities"
  fi
    • If you really want to drive your users crazy, you can use screen's hstatus (or caption, see man) to display a nag message in the bottom line of every screen window, but this won't work if your power-users are using the status line for something else. In ~/.screenrc (or /etc/screenrc) write:
    hardstatus on
hardstatus lastline
defhstatus "Please do not use this session for personal activities"

    or alternatively

    caption always
caption string "Please do not use this session for personal activities"
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