man(1) Manual page archive

     WRITE(1)                                                 WRITE(1)

          write  -  write to other users

          write person ...

          Write copies lines from your terminal to terminals of other
          persons designated either by login name or (to circumvent
          occasional ambiguities) by terminal name as given by who(1).
          It announces to each person your login name, your terminal,
          and the other persons. To respond, each recipient should
          execute a corresponding write to the persons he wants to
          talk to.

          When you are writing to more than one person, your messages
          are identified to the recipients.  Writing ends upon end of
          file or interrupt, and the message `EOF' is sent to the oth-

          Write recognizes certain commands during a conversation:

          !cmd      Execute a shell on the string cmd and then return
                    to write.

          :a person Add person to the list of people to whom you are
                    talking, and send an appropriate announcement to
                    all parties.  They must do :a for themselves if
                    they want to include the new person.

          :d person Drop person from your list and make appropriate

          :l        Print a list of people to whom you are talking.

          The following protocol is suggested for using write: when
          you first write to another user, wait for him to write back
          before starting to send.  Each party should end each message
          with a distinctive signal-(o) for `over' is conventional-
          that the other may reply.  (oo) for `over and out' is sug-
          gested when conversation is about to be terminated.

          Permission to write may be denied or granted by mesg(1).
          Normally writing is allowed.  Certain commands, in particu-
          lar nroff and pr(1) disallow messages in order to prevent
          messy output.

          /etc/utmp to find user
          /bin/sh        to execute `!'

     WRITE(1)                                                 WRITE(1)

          mesg(1), who(1), mail(1)

          Messages ought to be identified when the recipient is
          receiving from more than one writer, rather than when the
          writer is sending to more than one recipient, but that
          requires cooperating processes and isn't worth the effort.