NAME

write − write to another user

SYNOPSIS

write user [ tty ]

DESCRIPTION

Write copies lines from your terminal to that of another user.  When first called, it sends the message:

Message from your-logname your-tty ...

The recipient of the message should write back at this point.  Communication continues until an end of file is read from the terminal or an interrupt is sent.  At that point, write writes EOF on the other terminal and exits. 

If you want to write to a user who is logged in more than once, the tty argument may be used to indicate the appropriate terminal. 

Permission to write may be denied or granted by use of the mesg(1) command. At the outset, writing is allowed. Certain commands, in particular nroff(1) and pr(1), disallow messages in order to prevent messy output.

If the character !  is found at the beginning of a line, write calls the shell to execute the rest of the line as a command. 

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

FILES

/etc/utmpto find user
/bin/shto execute ! 

SEE ALSO

mail(1), mesg(1), who(1). 

May 16, 1980