*nix Documentation Project
·  Home
 +   man pages
·  Linux HOWTOs
·  FreeBSD Tips
·  *niX Forums

  man pages->Tru64 Unix man pages -> write (1)              



NAME    [Toc]    [Back]

       write - Sends messages to other users

SYNOPSIS    [Toc]    [Back]

       write [-r] [-n node] user [line]

       write user@node [line]

       write -h  handle,reply

       write -q  [-n node]

       The write command allows you to converse with another user
       who is logged in.

       [Tru64 UNIX]  The write -r command allows you to send messages
  to  users  on  other  hosts  (usually  from a shell
       script) and to wait for replies; use write -h to reply  to
       such messages.

STANDARDS    [Toc]    [Back]

       Interfaces  documented  on  this reference page conform to
       industry standards as follows:

       write:  XCU5.0

       Refer to the standards(5) reference page for more information
 about industry standards and associated tags.

OPTIONS    [Toc]    [Back]

       [Tru64  UNIX]  Replies  to  a message sent by a utility or
       shell script with write -r.  The value to be used for handle
  is  generated  internally  and supplied to you in the
       text of the original message.

              [Tru64 UNIX]  The  reply  can  be  ok,  cancel,  or
              query.  (See  EXAMPLES  and  EXIT  STATUS.)  [Tru64
              UNIX]  Specifies a remote host.  The node field may
              be a nickname or a node ID.  This option is used in
              place of the user@node argument; the two cannot  be
              specified together.  [Tru64 UNIX]  Queries all messages
 awaiting replies from users  on  a  node  and
              displays   them   with   their   handles.    [Tru64
              UNIX]  Generates a message handle, places it in the
              message  header, sends the message, and waits for a
              reply.  This option can be used for  operator  messages
  and  can  be put in shell scripts. It is not
              used for interactive conversations.  (See  EXAMPLES
              and EXIT STATUS).

OPERANDS    [Toc]    [Back]

       Login  name  of  the  user with whom you wish to converse.
       This operand is in the form written by the who utility.

              [Tru64 UNIX]  You may append an optional  @node  if
              the  user  is  on  a different host.  The format of
              @node is as much of the remote hostname and domainname
 as may be required by your system.  The terminal
 identification of the terminal where the  other
              user  is  logged in.  You only need to specify this
              parameter if the other user  has  several  sessions
              operating  on the target host.  See DESCRIPTION for
              a further explanation.

DESCRIPTION    [Toc]    [Back]

       When two users converse with write, each user  alternately
       sends  and  receives  short messages from their respective

       [Tru64 UNIX]  For another user to  receive  your  message,
       that user must be logged in and must not have refused message
 permission.  When a person you are trying to reach is
       not  logged in, you get the message user is not logged on.
       When the person you are trying to reach has  refused  message
  permission,  you  get  the message Write: Permission

       When you run the write command, it immediately  sends  the
       following  message  to  the  person  whose  login name you

       Message from sender on node (ttynn) [date]...

       [Tru64 UNIX]  The message is accompanied by attention-getting
 sound (three ASCII BEL characters).

       After  successful connection, the write command then sends
       two ASCII BEL characters to your  terminal  to  alert  you
       that  whatever  you  enter  now is being sent to the other
       user.  Sending continues until you enter  the  End-of-File
       key  sequence,  at  which point write sends an End-of-Text
       sequence to the other terminal and exits.

       At any point, the other user  can  respond  by  sending  a
       write message back.

       [Tru64  UNIX]  For  this  type  of exchange, the following
       convention is useful.  When you  first  write  to  others,
       wait  for them to write back before sending any text.  End
       a message with a prearranged signal (such as o  for  over)
       to alert the other user to reply.

       [Tru64  UNIX]  If  the !  (exclamation point) character is
       found at the beginning of an input line, write  calls  the
       shell to execute the rest of the line as a command.

       When you use the write command to contact a user logged in
       at more than one terminal,  write  uses  the  first  login
       instance  found  in  the /var/adm/utmp file as the message
       delivery point, and you get the message:

       user is logged on more than one place.  You are  connected
       to tty.  Other locations are: tty ...

       You  can contact this user at another location by specifying
 the line.  The parameter line indicates to which  terminal
 (tty00, for example) the message should be sent.

       Permission  to  use  the  write command to contact another
       user is granted or denied by the other user with the  mesg
       command.  Some commands deny message permission while they
       are running to prevent interference with their output.

       [Tru64 UNIX]  If you have  superuser  authority,  you  can
       write to any terminal regardless of the terminal's message

       [Tru64  UNIX]  The  write  command  filters   nonprintable
       characters  and transmits them in their printed form (that
       is, ASCII sequence 001 is transmitted as ^A).

       [Tru64 UNIX]  When the write -r command is  used  to  send
       you  a  message,  you  can  send a reply of ok, cancel, or
       query with write -h.  (See OPTIONS, EXAMPLES and EXIT STATUS).

       [Tru64  UNIX]  An  argument  of  a  - (dash) following the
       write command allows you to specify a specific terminal to
       which you want to write as the second argument.

       Typing  characters  from  LC_TYPE classifications print or
       space causes those characters to be sent  to  the  recipient's

NOTES    [Toc]    [Back]

       The talk utility is considered to be a more usable utility
       on full-screen terminals.

RESTRICTIONS    [Toc]    [Back]

       [Tru64 UNIX]  The writesrv daemon must be running  on  the
       target  host  in order for any of the options to work.  If
       you are not using either the -n option or @host, but using
       -h, -q, or -r, the writesrv daemon must be running on your

       [Tru64 UNIX]  See writesrv(8) for information  on  how  to
       start or stop the writesrv daemon.

EXIT STATUS    [Toc]    [Back]

       [Tru64  UNIX]  The  write  -r command is used to send messages
 to users and to wait for  replies.  Their  responses
       determine  the  exit  value:  [Tru64  UNIX]  Exit status 0
       (zero).  [Tru64 UNIX]  Exit status 1.  [Tru64  UNIX]  Message
 for handle redisplays; write does not exit.

       An  exit  status of 2 indicates that the user could not be

EXAMPLES    [Toc]    [Back]

       The following examples assume  that  the  End-of-File  key
       sequence is <Ctrl-d>.  The actual key sequence may be different.
  lucy on tty3 writes a message to sue on the  same
       node:  write  sue  Meet  me in the computer room at 12:30.

              sue sees: Message from lucy on node (tty3) [Thu Aug
              17  11:55:24  1990] Meet me in the computer room at
              12:30.  <EOT> Holding  a  conversation:  write  sue
              Meet me in the computer room at 12:30.  over

              lucy  then  waits  for  a  response  from  sue, who
              replies: write lucy I'm  running  tests  at  12:30.
              Can we meet at 3?  over

              sue  then  waits  for  lucy, who replies and terminates:
 OK--the computer room at 3.  bye <Ctrl-d>

              sue then terminates their side of the conversation.
              To  write  someone a prepared message, enter: write
              sue <message.text

              This writes the contents of the  file  message.text
              to  sue's terminal.  To write to the person using a
              certain  terminal,  enter:  write  -  console   The
              printer  in  building  998 has jammed.  Please send
              help.  <Ctrl-d>

              This writes the message to the person logged in  on
              the  system console.  To send a message to user sue
              at node, enter: write -n node sue

              or write sue@node To get a reply to a message, lucy
              might  enter  the  following:  write -r sue console
              Please insert next tape.

              sue  terminates  lucy's  message  with   write   -h
              12345,ok <Ctrl-d>

              or write -h 12345,cancel

              or write -h 12345,query

              sue then terminates as usual.

              Note  that  with the -h option, there is no need to
              supply the hostname or user ID.


       The following environment variables affect  the  execution
       of  write: Provides a default value for the internationalization
 variables that are unset or null. If LANG is unset
       or  null,  the corresponding value from the default locale
       is used.  If any  of  the  internationalization  variables
       contain an invalid setting, the utility behaves as if none
       of the variables had been defined.  If set to a  non-empty
       string value, overrides the values of all the other internationalization
 variables.  Determines the locale for  the
       interpretation of sequences of bytes of text data as characters
 (for example, single-byte as opposed  to  multibyte
       characters  in arguments).  If the recipient's locale does
       not use an equivalent LC_CTYPE, the results are undefined.
       Determines the locale for the format and contents of diagnostic
 messages written to standard error.  Determines the
       location  of  message  catalogues  for  the  processing of

FILES    [Toc]    [Back]

       Contains user and accounting information.

SEE ALSO    [Toc]    [Back]

       Commands:  mesg(1),  login(1),  sh(1b),  sh(1p),  talk(1),
       wall(1), who(1), writesrv(8)

       Files:  utmp(4)

       Standards:  standards(5)

[ Back ]
 Similar pages
Name OS Title
writesrv Tru64 Lets users send messages to and receive messages from a remote system
binmail Tru64 Sends and displays messages
mail Tru64 Sends and displays messages
wall Tru64 Sends a message to all users logged into the local system or to all members of a cluster
rpc.rwalld OpenBSD write messages to users currently logged in server
rwalld OpenBSD write messages to users currently logged in server
rpc.rwalld FreeBSD write messages to users currently logged in server
mesg FreeBSD display (do not display) messages from other users
mesg OpenBSD display (do not display) messages from other users
mac_seeotheruids FreeBSD simple policy controlling whether users see other users
Copyright © 2004-2005 DeniX Solutions SRL
newsletter delivery service