remote_cmds/talk.tproj/talk.1

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  32 .\"     @(#)talk.1      8.1 (Berkeley) 6/6/93
  33 .\" $FreeBSD: src/usr.bin/talk/talk.1,v 1.20 2005/02/13 22:25:24 ru Exp $
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  35 .Dd August 21, 2008
  36 .Dt TALK 1
  37 .Os
  38 .Sh NAME
  39 .Nm talk
  40 .Nd talk to another user
  41 .Sh SYNOPSIS
  42 .Nm
  43 .Ar person
  44 .Op Ar ttyname
  45 .Sh DESCRIPTION
  46 The
  47 .Nm
  48 utility is a visual communication program which copies lines from your
  49 terminal to that of another user.
  50 .Pp
  51 Options available:
  52 .Bl -tag -width ttyname
  53 .It Ar person
  54 If you wish to talk to someone on your own machine, then
  55 .Ar person
  56 is just the person's login name.
  57 If you wish to talk to a user on
  58 another host, then
  59 .Ar person
  60 is of the form
  61 .Ql user@host
  62 or
  63 .Ql host!user
  64 or
  65 .Ql host:user .
  66 .It Ar ttyname
  67 If you wish to talk to a user who is logged in more than once, the
  68 .Ar ttyname
  69 argument may be used to indicate the appropriate terminal
  70 name, where
  71 .Ar ttyname
  72 is of the form
  73 .Ql ttyXX .
  74 .El
  75 .Pp
  76 When first called,
  77 .Nm
  78 sends the message
  79 .Bd -literal -offset indent -compact
  80 Message from TalkDaemon@his_machine...
  81 talk: connection requested by your_name@your_machine.
  82 talk: respond with: talk your_name@your_machine
  83 .Ed
  84 .Pp
  85 to the user you wish to talk to.
  86 At this point, the recipient
  87 of the message should reply by typing
  88 .Pp
  89 .Dl talk \ your_name@your_machine
  90 .Pp
  91 It does not matter from which machine the recipient replies, as
  92 long as his login-name is the same.
  93 Once communication is established,
  94 the two parties may type simultaneously, with their output appearing
  95 in separate windows.
  96 Typing control-L
  97 .Ql ^L
  98 will cause the screen to
  99 be reprinted.
 100 Typing control-D
 101 .Ql ^D
 102 will clear both parts of your screen to be cleared, while
 103 the control-D character will be sent to the remote side
 104 (and just displayed by this
 105 .Nm
 106 client).
 107 Your erase, kill, and word kill characters will
 108 behave normally.
 109 To exit, just type your interrupt character;
 110 .Nm
 111 then moves the cursor to the bottom of the screen and restores the
 112 terminal to its previous state.
 113 .Pp
 114 Permission to talk may be denied or granted by use of the
 115 .Xr mesg 1
 116 command.
 117 At the outset talking is allowed.
 118 .Sh CONFIGURATION
 119 The
 120 .Nm
 121 utility relies on the
 122 .Nm talkd
 123 system daemon.  See
 124 .Xr talkd 8
 125 for information about enabling
 126 .Nm talkd .
 127 .Sh FILES
 128 .Bl -tag -width /var/run/utmpx -compact
 129 .It Pa /etc/hosts
 130 to find the recipient's machine
 131 .It Pa /var/run/utmpx
 132 to find the recipient's tty
 133 .El
 134 .Sh SEE ALSO
 135 .Xr mail 1 ,
 136 .Xr mesg 1 ,
 137 .Xr wall 1 ,
 138 .Xr who 1 ,
 139 .Xr write 1 ,
 140 .Xr talkd 8
 141 .Sh HISTORY
 142 The
 143 .Nm
 144 command appeared in
 145 .Bx 4.2 .
 146 .Pp
 147 In
 148 .Fx 5.3 ,
 149 the default behaviour of
 150 .Nm
 151 was changed to treat local-to-local talk requests as originating
 152 and terminating at
 153 .Em localhost .
 154 Before this change, it was required that the hostname (as per
 155 .Xr gethostname 3 )
 156 resolved to a valid IPv4 address (via
 157 .Xr gethostbyname 3 ) ,
 158 making
 159 .Nm
 160 unsuitable for use in configurations where
 161 .Xr talkd 8
 162 was bound to the loopback interface (normally for security reasons).
 163 .Sh BUGS
 164 The version of
 165 .Nm
 166 released with
 167 .Bx 4.3
 168 uses a protocol that
 169 is incompatible with the protocol used in the version released with
 170 .Bx 4.2 .
 171 .Pp
 172 Multibyte characters are not recognized.