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From: Bart Schaefer <schaefer@brasslantern.com>
Message-id: <140207082651.ZM28838@torch.brasslantern.com>
Date: Fri, 07 Feb 2014 08:26:51 -0800
In-reply-to: <ld2hgj$jfq$1@ger.gmane.org>
Comments: In reply to Thorsten Kampe <thorsten@thorstenkampe.de>
 "Re: Executing command on reattaching to screen session" (Feb  7, 12:54pm)
References: <ld0k6c$a3a$1@ger.gmane.org>
	<140206200141.ZM27955@torch.brasslantern.com>	<ld2hgj$jfq$1@ger.gmane.org>
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Subject: Re: Executing command on reattaching to screen session
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On Feb 7, 12:54pm, Thorsten Kampe wrote:
}
} >   latest_motd() {
} >     if [[ /etc/motd -nt ~/.last_motd ]]
} >     then
} >       cp --preserve=timestamps /etc/motd ~/.last_motd
} >       cat ~/.last_motd
} >     fi
} >   }
} >   add-zsh-hook precmd latest_motd
} 
} Thanks for the suggestion. The information has to be displayed 
} regularly even if it hasn't changed.

Well, then ... unless you're using the periodic hook for something else:

    # Show message of the day at least once per hour
    PERIOD=3600
    show_motd() { cat /etc/motd }
    add-zsh-hook periodic show_motd

but I imagine having it as a "screensaver" is still preferable to having
whatever else you were doing scroll away every hour.