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mesg [2006/07/11 04:57] (current)
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 +# $EPIC: mesg.txt,v 1.1.1.1 2006/07/11 04:57:43 jnelson Exp $
 +======Synopsis:​======
 +__mesg__ ​   [display the current terminal writability state] \\
 +__mesg__ yes    [make your terminal world-writeable] \\
 +__mesg__ no   [make your terminal not world-writeable]
 +
 +======Description:​======
 +This command simulates the effect of the unix __mesg__(1) command.
 +When you specify the '​yes'​ flag, other users on your system may write
 +messages directly to your terminal, which will mess up your ircII screen.
 +If you specify the '​no'​ flag, other users will be prohibited from writing
 +to your terminal. ​ If you do not specify an argument, the current value 
 +is used.
 +
 +This operation is permanent and transcends EPIC; when you exit EPIC the
 +value you set here will persist until you log out.
 +
 +Back in the day when dinosaurs roamed the earth and everybody on the
 +internet was using a unix shell account, the '​talk'​ program was very
 +popular and was used to talk to other users on other machines who were
 +not using irc.  Eventually some yutz on irc figured out that you could
 +corrupt a victim'​s terminal emulator making it impossible to see anything
 +by forging talk requests and inserting specially crafted data into it.
 +
 +If your unix host runs the talk daemon, you should __/MESG no__ to avoid
 +being the victim of a "talk bomb"​. ​ You really should turn off the talk
 +daemon since "talk bombs" are about the only thing they'​re used for these
 +days.  If your unix host is not running '​talk'​ then it really doesn'​t
 +matter what your __MESG__ setting is.
 +
 +Because write-access control to your terminal is controlled entirely ​
 +through ordinary unix file permissions,​ users that are not subject to
 +ordinary unix file permissions (ie, root) can never be prohibited from 
 +writing to your terminal. ​ This is not a bug in epic, this is how unix 
 +works.
  
mesg.txt ยท Last modified: 2006/07/11 04:57 (external edit)