telnet.1

来自「Linux下的socks的程序源程序,用于socks的代理服务」· 1 代码 · 共 1,513 行 · 第 1/3 页

that tabs and spaces may be included.
.Tp Cx Ic undefine
.Cx \&\ \&
.Ar variable
.Cx
Remove
.Ar variable
from the list of environment variables.
.Tp Cx Ic export
.Cx \&\ \&
.Ar variable
.Cx
Mark the variable
.Ar variable
to be exported to the remote side.
.Tp Cx Ic unexport
.Cx \&\ \&
.Ar variable
.Cx
Mark the variable
.Ar variable
to not be exported unless
explicitly asked for by the remote side.
.Tp Ic list
List the current set of environment variables.
Those marked with a \fB*\fR will be sent automatically,
other variables will only be sent if explicitly requested.
.Tp Ic \&?
Prints out help information for the
.Ic environ
command.
.Tp
.\" ######## END the "environ" command
.\"
.\" ######## BEGIN the "logout" command
.Tp Ic logout
Send the
.Li TELNET LOGOUT
option to the remote side.
This is similar to doing a
.Ic close
command, however
if the remote side does not support the
.Li LOGOUT
option, then nothing will happen.
If, however, the remote side does support the
.Li LOGOUT
option, then this command should cause the remote side
to close the
.Li TELNET
connection.
In addition, if the remote side supports the concept of suspending
a users session for later re-attachement, the
.Li LOGOUT
option indicates that the session should be terminated immediately.
.\" ######## END the "logout" command
.\"
.\" ######## BEGIN the "mode" command
.Tp Cx Ic mode
.Cx \&\ \&
.Ar type
.Cx
.Ar Type
is one of several options, depending on the state of the
.Li TELNET
session.
The remote host is asked for permission to go into the requested mode.
If the remote host is capable of entering that mode, the requested
mode will be entered.
.Tw Ar
.Tp Ic character
Disable the
.Li TELNET LINEMODE
option, or, if the remote side does not understand the
.Li LINEMODE
option, then enter \*(Lqcharacter at a time\*(Lq mode.
.Tp Ic line
Enable the
.Li TELNET LINEMODE
option, or, if the remote side does not understand the
.Li LINEMODE
option, then attempt to enter \*(Lqold-line-by-line\*(Lq mode.
.Tp Cx Ic isig
.Cx \&\ \&
.Pq Ic \-isig
.Cx
Attempt to enable (disable) the 
.Li TRAPSIG
mode of the 
.Li LINEMODE
option.
This requires that the 
.Li LINEMODE
option be enabled.
.Tp Cx Ic edit
.Cx \&\ \&
.Pq Ic \-edit
.Cx
Attempt to enable (disable) the 
.Li EDIT
mode of the 
.Li LINEMODE
option.
This requires that the 
.Li LINEMODE
option be enabled.
.Tp Cx Ic softtabs
.Cx \&\ \&
.Pq Ic \-softtabs
.Cx
Attempt to enable (disable) the 
.Li SOFT_TAB
mode of the 
.Li LINEMODE
option.
This requires that the 
.Li LINEMODE
option be enabled.
.Tp Cx Ic litecho
.Cx \&\ \&
.Pq Ic \-litecho
.Cx
Attempt to enable (disable) the 
.Li LIT_ECHO
mode of the 
.Li LINEMODE
option.
This requires that the 
.Li LINEMODE
option be enabled.
.Tp Ic \&?
Prints out help information for the
.Ic mode
command.
.Tp
.\" ######## END the "mode" command
.\"
.\" ######## BEGIN the "open" command
.Tp Cx Ic open
.Cx \&\ \&
.Ar host
.Cx \&\ \&
.Cx [
.Op Fl l
.Cx \&\ \&
.Ar user
.Cx ]
.Cx [
.Op Fl
.Cx \&\ \&
.Ar port
.Cx ]
.Cx
Open a connection to the named host.
If no port number
is specified,
.Nm telnet
will attempt to contact a
.Li TELNET
server at the default port.
The host specification may be either a host name (see
.Xr hosts 5  )
or an Internet address specified in the \*(Lqdot notation\*(Rq (see
.Xr inet 3  ) .
The
.Op Fl l
option may be used to specify the user name
to be passed to the remote system via the
.Li ENVIRON
option.
When connecting to a non-standard port,
.Nm telnet
omits any automatic initiation of
.Li TELNET
options.  When the port number is preceded by a minus sign,
the initial option negotiation is done.
After establishing a connection,
if the
.Ic skiprc
variable is not enabled
(see the
.Ic toggle
.Ic skiprc
command below),
the file
.Pa \&.telnetrc
in the
users home directory is opened.  Lines beginning with a # are
comment lines.  Blank lines are ignored.  Lines that begin
without whitespace are the start of a machine entry.  The
first thing on the line is the name of the machine that is
being connected to.  The rest of the line, and successive
lines that begin with whitespace are assumed to be
.Nm telnet
commands and are processed as if they had been typed
in manually to the
.Nm telnet
command prompt.
The special machine name
.Ic DEFAULT
is used to specify commands that should be executed for
all machines.
There may be more than one entry for a machine; all matches
will the specified machine name will be executed.
.\" ######## END the "open" command
.\"
.\" ######## BEGIN the "quit" command
.Tp Ic quit
Close any open
.Li TELNET
session and exit
.Nm telnet  .
An end of file (in command mode) will also close a session and exit.
.\" ######## END the "quit" command
.\"
.\" ######## BEGIN the "send" command
.Tp Cx Ic send
.Cx \&\ \&
.Ar arguments
.Cx
Sends one or more special character sequences to the remote host.
The following are the arguments which may be specified
(more than one argument may be specified at a time):
.Pp
.Tw Ds
.Tp Ic abort
Sends the
.Li TELNET ABORT
(ABORT processes)
sequence.
.Tp Ic ao
Sends the
.Li TELNET AO
(Abort Output) sequence, which should cause the remote system to flush
all output
.Em from
the remote system
.Em to
the user's terminal.
.Tp Ic ayt
Sends the
.Li TELNET AYT
(Are You There)
sequence, to which the remote system may or may not choose to respond.
.Tp Ic brk
Sends the
.Li TELNET BRK
(Break) sequence, which may have significance to the remote
system.
.Tp Ic ec
Sends the
.Li TELNET EC
(Erase Character)
sequence, which should cause the remote system to erase the last character
entered.
.Tp Ic el
Sends the
.Li TELNET EL
(Erase Line)
sequence, which should cause the remote system to erase the line currently
being entered.
.Tp Ic eof
Sends the
.Li TELNET EOF
(End Of File)
sequence.
.Tp Ic eor
Sends the
.Li TELNET EOR
(End of Record)
sequence.
.Tp Ic escape
Sends the current
.Nm telnet
escape character (initially \*(Lq^\*(Rq).
.Tp Ic ga
Sends the
.Li TELNET GA
(Go Ahead)
sequence, which likely has no significance to the remote system.
.Tp Ic getstatus
If the remote side supports the
.Li TELNET STATUS
command,
.Ic getstatus
will send the subnegotiation to request that the server send
its current option status.
.Tp Ic ip
Sends the
.Li TELNET IP
(Interrupt Process) sequence, which should cause the remote
system to abort the currently running process.
.Tp Ic nop
Sends the
.Li TELNET NOP
(No OPeration)
sequence.
.Tp Ic susp
Sends the
.Li TELNET SUSP
(SUSPend process)
sequence.
.Tp Ic synch
Sends the
.Li TELNET SYNCH
sequence.
This sequence causes the remote system to discard all previously typed
(but not yet read) input.
This sequence is sent as TCP urgent
data (and may not work if the remote system is a 4.2 BSD system -- if
it doesn't work, a lower case \*(Lqr\*(Rq may be echoed on the terminal).
.Tp Ic \&?
Prints out help information for the
.Ic send
command.
.Tp
.\" ######## END the "send" command
.\"
.\" ######## BEGIN the "set" and "unset" commands
.Tp Cx Ic set
.Cx \&\ \&
.Ar argument value
.Cx
.Tp Cx Ic unset
.Cx \&\ \&
.Ar argument value
.Cx
The
.Ic set
command will set any one of a number of
.Nm telnet
variables to a specific value or to TRUE.
The special value
.Ic off
turns off the function associated with
the variable, this is equivalent to using the
.Ic unset
command.
The
.Ic unset
command will disable or set to FALSE any of the specified functions.
The values of variables may be interrogated with the
.Ic display
command.
The variables which may be set or unset, but not toggled, are
listed here.  In addition, any of the variables for the
.Ic toggle
command may be explicitly set or unset using
the
.Ic set
and
.Ic unset
commands.
.Tw Fl
.Tp Ic ayt
If
.Nm telnet
is in
.Ic localchars
mode, or
.Li LINEMODE
is enabled, and the
.Ic status
character is typed, a
.Li TELNET AYT
sequence (see
.Ic send
.Ic ayt
above)
is sent to the remote host.
The initial value for the ayt character is taken to be
the terminal's
.Ic status
character.
.Tp Ic echo
This is the value (initially \*(Lq^E\*(Rq) which, when in
\*(Lqline by line\*(Rq mode, toggles between doing local echoing
of entered characters (for normal processing), and suppressing
echoing of entered characters (for entering, say, a password).
.Tp Ic eof
If
.Nm telnet
is operating in
.Li LINEMODE
or \*(Lqold line by line\*(Rq mode, entering this character
as the first character on a line will cause this character to be
sent to the remote system.
The initial value of the eof character is taken to be the terminal's
.Ic eof
character.
.Tp Ic erase
If
.Nm telnet
is in
.Ic localchars
mode (see
.Ic toggle
.Ic localchars
below),
.Sy and
if
.Nm telnet
is operating in \*(Lqcharacter at a time\*(Rq mode, then when this
character is typed, a
.Li TELNET EC
sequence (see
.Ic send
.Ic ec
above)
is sent to the remote system.
The initial value for the erase character is taken to be
the terminal's
.Ic erase
character.
.Tp Ic escape
This is the
.Nm telnet
escape character (initially \*(Lq^[\*(Rq) which causes entry
into
.Nm telnet
command mode (when connected to a remote system).
.Tp Ic flushoutput
If
.Nm telnet
is in
.Ic localchars
mode (see
.Ic toggle
.Ic localchars
below)
and the
.Ic flushoutput
character is typed, a
.Li TELNET AO
sequence (see
.Ic send
.Ic ao
above)
is sent to the remote host.
The initial value for the flush character is taken to be
the terminal's
.Ic flush
character.
.Tp Ic forw1
.Tp Ic forw2
If
.Nm telnet
is operating in
.Li LINEMODE,
these are the characters that, when typed,
cause partial lines to be forwarded to the remote system.
The initial value for the forw1 and forw2 characters are
taken from the terminal's
.Ic eol
and
.Ic eol2
characters.
.Tp Ic interrupt
If
.Nm telnet
is in
.Ic localchars
mode (see
.Ic toggle
.Ic localchars
below)
and the
.Ic interrupt
character is typed, a
.Li TELNET IP
sequence (see
.Ic send
.Ic ip
above)
is sent to the remote host.
The initial value for the interrupt character is taken to be
the terminal's
.Ic intr
character.
.Tp Ic kill
If
.Nm telnet
is in
.Ic localchars
mode (see
.Ic toggle
.Ic localchars
below),
.Ic and
if
.Nm telnet
is operating in \*(Lqcharacter at a time\*(Rq mode, then when this
character is typed, a
.Li TELNET EL
sequence (see
.Ic send
.Ic el
above)
is sent to the remote system.
The initial value for the kill character is taken to be
the terminal's
.Ic kill
character.
.Tp Ic lnext
If