315 lines
5 KiB
Text
315 lines
5 KiB
Text
.TH CON 1
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.SH NAME
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con, telnet, rx, hayes, xms, xmr \- remote login, execution, and XMODEM file transfer
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.SH SYNOPSIS
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.B con
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[
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.B -CdnrRsTv
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]
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[
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.B -b
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.I baud
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]
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[
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.B -l
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[
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.I user
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]
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]
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[
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.B -S
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.I svc
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]
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[
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.B -c
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.I cmd
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]
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.RI [ net !] machine
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.PP
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.B telnet
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[
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.B -dCrn
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]
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[
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.B -s
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.I svc
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]
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.RI [ net !] machine
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.PP
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.B rx
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[
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.B -eTr
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]
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[
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.B -l
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.I user
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]
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.RI [ net !] machine
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[
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.I command-word ...
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]
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.PP
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.B hayes
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[
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.B -pv
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]
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.I number
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[
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.I device
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]
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.PP
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.B xms
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[
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.B -1p
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]
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.I file
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.PP
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.B xmr
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.I file
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.SH DESCRIPTION
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.I Con
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connects to the computer whose network address is
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.IR net ! machine
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and logs in if possible.
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With no options, the account name used on the remote system is the same
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as that on the local system.
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Standard input and output go to the local machine.
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.PP
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Options are:
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.TP
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.B -b
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sets the baud rate of a dial-up connection to
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.IR baud .
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.TP
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.B -n
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if the input is a file or pipe, do not hang up the connection when EOF is received,
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but instead wait for the remote end to hang up.
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.TP
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.B -l
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with an argument causes
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.I user
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to be used as the account name on the remote system
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when performing BSD
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.I rlogin
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authentication.
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Without an argument this option disables automatic login
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and a normal login session ensues.
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.TP
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.B -C
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forces cooked mode, that is, local echo.
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.TP
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.B -c
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runs
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.I cmd
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as if it had been typed as a command from the escape mode.
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.TP
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.B -v
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(verbose mode) causes information about connection attempts
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to be output to standard error. This can be useful when
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trying to debug network connectivity.
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.TP
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.B -d
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causes debugging information to be output to standard error.
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.TP
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.B -r
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suppresses printing of any carriage return followed by a new line.
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This is useful since carriage return is a printable character in
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Plan 9.
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.TP
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.B -R
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translates newlines to carriage returns and
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.IR "vice versa" .
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.TP
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.B -T
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translates incoming carriage returns to newlines.
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.TP
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.B -s
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strips received characters to 7 bits to forestall
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misinterpretation of
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.SM ASCII
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with parity as
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.SM UTF\c
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\&.
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.TP
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.B -S
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Post a pipe as
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.BI /srv/ svc
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and connect it to standard input and output.
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This can be used with
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.B -n
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to create a standing connection that
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.IR consolefs (4),
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for example,
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can then open.
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For
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.IR telnet ,
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this option is
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.BR -s .
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.PP
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The
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.RB control\- \e
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character is a local escape.
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It prompts with
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.BR >>> .
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Legitimate responses to the prompt are
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.TP
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.B i
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Send a quit [sic] signal to the remote machine.
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.PD0
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.TP
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.B q
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Exit.
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.TP
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.B b
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Send a break.
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.TP
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.B .
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Return from the escape.
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.TP
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.B !cmd
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Run the command with the network connection as its
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standard input and standard output.
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Standard error will go to the screen.
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This is useful for transmitting and receiving files
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over the connections using programs such as
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.IR xms .
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.TP
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.B r
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Toggle printing of carriage returns.
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.PD
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.PP
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.I Telnet
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is similar to con, but uses the
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.I telnet
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protocol to communicate with the remote machine.
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It shares
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.I con's
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.BR -C ,
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.BR -d ,
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.BR -n ,
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and
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.BR -r
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options.
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.PP
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.I Rx
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executes one shell command
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on the remote machine as if logged in there,
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but with local standard input and output.
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A rudimentary shell environment is provided.
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If the target is a Plan 9 machine,
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.B $service
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there will be
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.BR rx .
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Options are:
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.TP
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.B \-e
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a zero length message will not be written to the
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connection when standard input is closed.
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.TP
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.B \-l
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runs as
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.I user
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on the remote machine if the remote is a BSD machine.
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.TP
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.B \-r
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same as for
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.I con
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.TP
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.B -T
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same as for
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.I con
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.PD
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.PP
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Network addresses for both
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.I con
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and
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.I rx
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have the form
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.IB network ! machine\f1.
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Supported networks are those listed in
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.BR /net .
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.PP
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.I Hayes
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dials
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.I number
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on a Hayes-compatible modem,
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.IR device .
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Under
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.BR -p ,
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it uses pulse dialing.
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Upon connecting,
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bytes are copied bidirectionally
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between the connection and standard input and output.
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.PP
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The commands
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.I xms
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and
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.I xmr
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respectively send and receive a single file using the
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XMODEM protocol.
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They use standard input and standard output for communication
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and are intended for use with
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.IR con .
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The
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.B -1
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option to
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.I xms
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causes it to use kilobyte packet size of 1024 bytes.
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The
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.B -p
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option causes it to print a progress
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message every ten kilobytes.
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.SH EXAMPLES
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.TP
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.L
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rx kremvax cat file1 >file2
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Copy remote
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.I file1
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to local
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.IR file2 .
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.TP
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.L
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rx kremvax cat file1 '>file2'
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Copy remote
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.I file1
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to remote
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.IR file2.
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.TP
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.L
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eqn paper | rx kremvax troff -ms | rx deepthought lp
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Parallel processing:
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do each stage of a pipeline on a different machine.
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.SH SOURCE
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.TF /sys/src/cmd/ip/telnet.c
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.TP
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.B /sys/src/cmd/rx.c
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.TP
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.B /sys/src/cmd/ip/telnet.c
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.TP
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.B /sys/src/cmd/con
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for all other commands
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.SH SEE ALSO
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.IR cpu (1),
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.IR ssh (1),
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.IR telco (4)
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.SH BUGS
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.I Con
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and
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.I telnet
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are merely obsolescent;
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the other commands are obsolete and deprecated.
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.PP
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Under
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.IR rx ,
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a program
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that should behave specially towards terminals may not: e.g.,
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remote shells will not prompt.
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Also under
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.IR rx ,
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the remote standard error and standard output are combined
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and go inseparably to the local standard output.
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.I Rx
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will consume its standard input by copying it to the remote system,
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so redirect it from
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.BR /dev/null
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if that's not what you want.
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