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Full Discussion: ssh via expect
Top Forums Shell Programming and Scripting ssh via expect Post 302527944 by rovf on Monday 6th of June 2011 05:54:17 AM
Old 06-06-2011
ssh via expect
(Crossposting note: I have already posted this article on comp.lang.tcl 6 days ago and on the tek-tips dot com forum 3 days ago. This is posted here again, because I didn't get any response on my original articles there).

I use the following script on Solaris to log into a remote host:


Code:
spawn ssh other@[exec uname -n]
expect {$}
send ". xxx/s\r"
interact


This script works well. However, I don't quite understand the output
printed by this script on stdout:


Code:
spawn ssh other@rom38
 xxx/s
 xxx/s
Last login: Tue May 31 10:01:35 2011 from rom38.muc.infin
bash-2.03$ . xxx/s
[other] rom38@~>

The last line is the prompt after logging in. However, why do I see
the line

Code:
. xxx/s

three times? I would have expected it only once (the last occurance),
but why do I see it already before twice? My guess is that this is
some timing issue (that I send the command just a bit too early),
but even then, I should see only one extra occurance.
Last edited by pludi; 06-06-2011 at 07:47 AM..
 

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LEARN ABOUT DEBIAN

gnome-ssh-askpass

GNOME-SSH-ASKPASS(1)					      General Commands Manual					      GNOME-SSH-ASKPASS(1)

NAME

       gnome-ssh-askpass - prompts a user for a passphrase using GNOME

SYNOPSIS

       gnome-ssh-askpass

DESCRIPTION

       gnome-ssh-askpass  is  a GNOME-based passphrase dialog for use with OpenSSH.  It is intended to be called by the ssh-add(1) program and not
       invoked directly.  It allows ssh-add(1) to obtain a passphrase from a user, even if not connected to a terminal (assuming that an X display
       is  available).	This happens automatically in the case where ssh-add is invoked from one's ~/.xsession or as one of the GNOME startup pro-
       grams, for example.

       In order to be called automatically by ssh-add, gnome-ssh-askpass should be installed as /usr/bin/ssh-askpass.

ENVIRONMENT VARIABLES

       The following environment variables are recognized:

       GNOME_SSH_ASKPASS_GRAB_SERVER
	      Causes gnome-ssh-askpass to grab the X server before asking for a passphrase.

       GNOME_SSH_ASKPASS_GRAB_POINTER
	      Causes gnome-ssh-askpass to grab the mouse pointer using gdk_pointer_grab() before asking for a passphrase.

       Regardless of whether either of these environment variables is set, gnome-ssh-askpass will grab the keyboard using gdk_keyboard_grab().

AUTHOR

       This manual page was written by Colin Watson <cjwatson@debian.org> for the Debian system (but may be used by others).  It was based on that
       for x11-ssh-askpass by Philip Hands.

															      GNOME-SSH-ASKPASS(1)
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