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WRITE(1)		    General Commands Manual		      WRITE(1)

       write - write a message to another user

       write username [	ttyname	]

       write copies lines from your standard input to username's screen.

       When  you  type	a  write command, the person you are writing to	sees a
       message like this:

	      Message from hostname!yourname on	yourttyname at hh:mm ...

       After typing the	write command, enter the text of your  message.	  What
       you  type appears line-by-line on the other user's screen.  Conclude by
       typing an EOF indication	(CTRL-D) or an interrupt.  At this point write
       displays	EOF on your recipient's	screen and exits.

       To write	to a user who is logged	in more	than once, use the ttyname ar-
       gument to indicate the appropriate terminal name.

       You can grant or	deny other users permission to write to	you  by	 using
       the  mesg command (default allows writing).  Certain commands, nroff(1)
       and pr(1V) in particular, do not	allow anyone to	write to you while you
       are using them in order to prevent messy	output.

       If  write finds the character `!'  at the beginning of a	line, it calls
       the shell to execute the	rest of	the line as a command.

       Two people can carry on a conversation  by  "writing"  to  each	other.
       When  the  other	person receives	the message indicating you are writing
       to him, he can then write back to you if	he wishes.  However, since you
       are  now	 simultaneously	typing and receiving messages, you end up with
       garbage on your screen unless you work  out  some  sort	of  scheduling
       scheme  with  your  partner.   You might	try the	following conventional
       protocol: when you first	write to another user, wait for	him  to	 write
       back before starting to send.  Each person should end each message with
       a distinctive signal -- -o- (for	"over")	is standard  --	 so  that  the
       other knows when	to begin a reply.  To end your conversation, type -oo-
       (for "over and out") before finishing the conversation.

       Here is an example of a short dialog between two	 people	 on  different
       terminals.   Two	 users called "Horace" and "Eudora" are	logged in on a
       system called "jones".  To illustrate the process, both users'  screens
       are shown side-by-side:
       Eudora's	Terminal				 Horace's Terminal
						Horace is staring at his screen
       jones% write  horace
       how about a squash game tonight?	-o-
						Message	from jones!eudora on tty09 at 17:05 ...
						how about a squash game	tonight? -o-
						jones% write  eudora
						I'm playing tiddlywinks	with Carmeline -o-
       Message from jones!horace on tty03 at 17:06 ...
       I'm playing tiddlywinks with Carmeline -o-
       How about the beach on Sunday? -o-
						How about the beach on Sunday? -o-
						Sorry, I'm washing my tent that	day -o-
       Sorry, I'm washing my tent that day -o-
       See you when I get back from Peru -oo-
						See you	when I get back	from Peru -oo-
       jones%					EOF
						I hear rack of llama is	very tasty -oo-
       I hear rack of llama is very tasty -oo-
       EOF					jones%

       The  environment	 variables  LC_CTYPE, LANG, and	LC_default control the
       character classification	throughout write.  On entry  to	 write,	 these
       environment  variables  are  checked  in	the following order: LC_CTYPE,
       LANG, and LC_default.  When a valid value is found, remaining  environ-
       ment  variables for character classification are	ignored.  For example,
       a new setting for LANG does not override	the  current  valid  character
       classification  rules  of  LC_CTYPE.  When none of the values is	valid,
       the shell character classification defaults to the POSIX.1 "C" locale.

       /etc/utmp	   to find user
       /usr/bin/sh	   to execute !

       mail(1),	mesg(1), pr(1V), talk(1), troff(1), who(1), locale(5)

				2 October 1989			      WRITE(1)


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