ztelnet

ZSSH(1)                              ZSSH                              ZSSH(1)



NAME
       zssh - interactive file transfer wrapper for ssh


SYNOPSIS
       zssh [zssh options] [--] [ssh options]
       ztelnet [zssh options] [--] [telnet options]


DESCRIPTION
       zssh (Zmodem SSH) is a program for interactively transferring files to
       a remote machine while using the secure shell ( ssh ). It is intended
       to be a convenient alternative to scp , allowing to transfer files
       without having to open another session and re-authenticate oneself.

       zssh is an interactive wrapper for ssh used to switch the ssh
       connection between the remote shell and file transfers. This is
       achieved by using another tty/pty pair between the user and the local
       ssh process to plug either the user's tty (remote shell mode) or
       another process (file transfer mode) on the ssh connection.

       ztelnet behaves similarly to zssh, except telnet is used instead of
       ssh.  It is equivalent to 'zssh -s "telnet -8 -E"'

       Files are transferred through the zmodem protocol, using the rz and sz
       commands.

       zssh behaves as an usual ssh session until the escape sequence is
       depressed ( default is ^@ which can be produced by pressing C-space, or
       C-2, or C-` ), which enables file transfer mode. A new prompt is then
       displayed, and commands can be executed locally to initiate file
       transfers (among other things). It roughly behaves as a local shell
       featuring line edition, history and completion (thanks to libreadline),
       globbing, and escape characters ( " ' and \ ).

       The following builtins are handled by zssh itself: ?  , cd , disconnect
       , escape , exit , help , hook , quit , repeat , rz , suspend , sz ,
       version


       cd <dir>            change current directory

       disconnect          disconnect and exit

       escape [^X]         Change escape key to ^X. Without argument, print
                           current escape key

       exit                exit file transfer mode. ^D may also be used for
                           this purpose.

       help                print help and tips
       ?

       hook prg [args]     Hook program 'prg' on the the pty. Its standard
                           input and output will go through the ssh channel.
                           typing 'sz'/'rz' is in fact equivalent to 'hook
                           sz'/'hook rz'
                           A weird imagination is most useful to gain full
                           advantage of this feature.

       quit                same as exit.

       repeat              repeats cmd forever (^C to interrupt). Useful for
                           example if you use a remote script invoking "sz"
                           and you don't want to be typing "rz" each time...
                           Remember however that several files can be
                           transferred by a single sz/rz pair so this is not
                           usually necessary to use repeat.

       rz                  Receive files from the remote machine. runs rz and
                           plugs the process on the ssh connection.  running
                           sz on the REMOTE machine is required :
                           1)   run `sz <remote_file> ...' from the remote
                                machine shell
                           2)   press the escape sequence (C-space) to enter
                                file transfer mode
                           3)   run the `rz' builtin

       suspend             suspend zssh (back to the local machine shell)

       sz <file> ...       Send files to the remote machine. runs sz and plugs
                           the process on the ssh connection.  There is no
                           need to manually run rz on the remote side.

       version             print version information



       builtins rz , sz , hook and exit return to shell mode after completion.


OPTIONS
       -f
       --force             Do not ask user any question

       -h
       --help              show basic help

       -s cmd
       --shell cmd         run cmd as remote shell instead of the default "ssh
                           -e none" (zssh) or "telnet -8 -E" (ztelnet)
                           ex: zssh -s "rsh -x"

       -V
       --version           show version

       -z ^X
       --zssh-escape ^X    set escape sequence to ^X


       -- may be used to separate zssh options from ssh ones
       Other arguments are passed verbatim to ssh/telnet/whatever.


ENVIRONMENT
       ZSSHESCAPE
                 Setting the ZSSHESCAPE environment variable allows one to
                 override the default escape sequence. ZSSHESCAPE should
                 contain only two characters of the form `^X', meaning that ^X
                 is to be the new escape sequence.


REQUIREMENTS
       the following binaries need to be properly installed for zssh to work :

       ssh/telnet/...
                 the remote shell to be executed (local machine)

       sz rz     zmodem send and receive programs. Should be both on local and
                 remote machine, and (hopefully) of compatible versions.

TIPS
       If file transfer is initiated but never completes
       ( ie a line like :
           Bytes Sent:  38144/4610624   BPS:3424     ETA 22:15
         or
           Bytes Sent:      0/    513   BPS:0        ETA 00:00  Retry 0: Got
       ZCAN
         can be seen, but transfer never completes
       )
       Chances are the pty/tty on one of the systems are not 8-bit clean.
       (Linux is 8-bit clean, NetBSD is not).
       Using the -e (escape) option of rz should solve this problem.

       Transfers can be interrupted with ^C (somewhat experimental =)

       If you get stuck in rz/sz (for example you've just ran rz, but you then
       decided not to transmit anything), hit a dozen ^X (Ctrl-X, not the zssh
       escape!) to stop it

       Use `sz -y <files>' to overwrite files on the other side



BUGS / LIMITATIONS
       You may sometimes have to hit return 2 or 3 times after file transfer
       completion in order get back to the shell. Some digits are usually
       displayed; don't worry it won't harm (you or your term) ...

       the tty may (sometimes) be somewhat upset after an interrupted transfer
       ( using ^C ). typing `reset' in this case should help.

       no pipe, redirection (and other stuff) support in shell ...  but after
       all there are already wonderful shells around =)


CREDITS
       ttssh's author - Robert O'Callahan - for the original idea

       The sourceforge team.


AUTHOR
       Matthieu Lucotte <gounter@users.sourceforge.net>

       zssh homepage: http://zssh.sourceforge.net


SEE ALSO
       ssh(1), telnet(1), scp(1), sz(1), rz(1), readline(3),



ZSSH                             June 26, 2000                         ZSSH(1)