x11-ssh-askpass man page on DragonFly
[printable version]
x11-ssh-askpass(1) BSD General Commands Manual x11-ssh-askpass(1)
NAME
x11-ssh-askpass — an X11-based pass-phrase dialog for use with OpenSSH
SYNOPSIS
x11-ssh-askpass [options] [label]
DESCRIPTION
x11-ssh-askpass is an X11-based pass-phrase dialog for use with OpenSSH.
It is intended to be called from the ssh-add(1) program and not invoked
directly.
x11-ssh-askpass supports most standard Toolkit command line arguments,
with the exception of -geometry, -borderwidth, -iconic, -rv, and -title.
See X(1).
If exactly one non-option argument is provided on the command line, it is
displayed in the dialog instead of the default label. If the argument
contains newline characters ('\n'), each line of text is displayed on a
separate line in the dialog.
The features of x11-ssh-askpass are as follows:
- Configurable via the standard X resource mechanisms
/usr/X11R6/lib/X11/app-defaults, ~/.Xdefaults, xrdb(1), etc.
- Requires only stock X11 libraries (libXt, libX11, libSM,
libICE).
- Can be configured to grab the keyboard and/or pointer (grabs
the keyboard by default, not the pointer).
The user interface is somewhat different than most password/pass-phrase
dialogs and more similar to the X11-based pass-phrase dialog that accom‐
panies the regular SSH distribution. Instead of a text field that fills
with asterisks or some other character as the user enters the pass-
phrase, a series of LED-like areas light up one-by-one with each pass-
phrase character entered, beginning from the left-hand edge of the dia‐
log. When they reach the right-hand edge, they go dark one-by-one again,
and so on. This gives the user feedback that pass-phrase characters have
been entered, but does not provide onlookers with a cue as to the length
of the pass-phrase.
Pressing the ‘OK’ button accepts the pass-phrase (even if it is empty),
which is printed on the standard output, and the dialog exits with a sta‐
tus of zero (success). Pressing the ‘Cancel’ button discards the pass-
phrase, and the dialog exits with non-zero status.
The following keystrokes work as expected:
[Backspace]
[Delete] Erase previous character
[Control+U]
[Control+X] Erase entire pass-phrase
[Enter]
[Control+M]
[Control+J] Accept pass-phrase (OK)
[Escape] Discard pass-phrase (Cancel)
WIDGETS
The main window of x11-ssh-askpass has the widget hierarchy indicated
below. The widget class name is given first, followed by the instance
name.
Dialog dialog
Indicator indicator
Button okButton
Button cancelButton
RESOURCES
The following resources are used to customize the application globally:
grabKeyboard (class GrabKeyboard)
specifies if the application should grab the keyboard.
Default value: “True”.
grabPointer (class GrabPointer)
specifies if the application should grab the pointer.
Default value: “False”.
grabServer (class GrabServer)
specifies if the application should grab the server.
Default value: “False”.
inputTimeout (class InputTimeout)
the number of seconds x11-ssh-askpass should wait for a key or
button press before it gives up and exits. A timeout of “0”
means wait forever.
Default value: “0”.
defaultXResolution (class DefaultXResolution)
the number of pixels per unit length that horizontal spacing
and width values are intended for. If the actual horizontal
(x) resolution of the X server is significantly greater or less
than this value, portions of the dialog, indicator, and button
widgets are stretched or shrunk horizontally to take the dif‐
ference into account. The value is a positive integer, followed
by a slash (/) and a one- or two-character unit abbreviation.
Valid units are inches (in or i) and meters (m).
Default value: “75/in” (75 pixels per inch).
defaultYResolution (class DefaultYResolution)
the number of pixels per unit length that vertical spacing and
height values are intended for. If the actual vertical (y)
resolution of the X server is significantly greater or less
than this value, portions of the dialog, indicator, and button
widgets are stretched or shrunk vertically to take the differ‐
ence into account. Valid values are the same as for
defaultXResolution above.
Default value: “75/in” (75 pixels per inch).
xResolutionFuzz (class XResolutionFuzz)
the range of “fuzz” around the value of defaultXResolution
beyond which some widgets will be stretched or shrunk horizon‐
tally to fit the current actual horizontal resolution. Valid
values are the same as for defaultXResolution. For example, if
the default X resolution is “75/in”, and the X resolution fuzz
is “50/in”, then widgets won't be scaled horizontally unless
the actual horizontal resolution is less than 25 pixels per
inch or greater than 125 pixels per inch.
Default value: “20/in” (20 pixels per inch).
yResolutionFuzz (class YResolutionFuzz)
the range of “fuzz” around the value of defaultYResolution
beyond which some widgets will be stretched or shrunk verti‐
cally to fit the current actual vertical resolution. Valid val‐
ues are the same as for defaultXResolution above.
Default value: “20/in” (20 pixels per inch).
The following resources are recognized by the Dialog widget:
title (class Title)
The title of the application as specified to the window man‐
ager.
label (class Label)
The label displayed above the led indicators.
font (class Font)
The font to be used to display the label.
The following Resources are recognized by the dialog, button, and indica‐
tor widgets and the main widget to customize the 3D appearance (all mea‐
surements are in pixels):
foreground (class Foreground)
The foreground color of the widget. This is the text color of
the label for buttons and dialog and the color of the active
led for the indicator.
background (class Background)
The background color of the widget. In the case of the indica‐
tor this is the color of the inactive led.
topShadowColor (class TopShadowColor)
The color used by the sides of the widget exposed to the light
(top and left).
bottomShadowColor (class BottomShadowColor)
The color used by the sides of the widget in the shadow (right
and bottom).
shadowThickness (class ShadowTickness)
The thickness of the 3D border of the widget.
borderColor (class BorderColor)
The color of the border around the widget.
borderWidth (class BorderWidth)
The width of the border around the widget.
horizontalSpacing (class HorizontalSpacing)
The space to leave on left and right sides of the widget.
verticalSpacing (class VerticalSpacing)
The space to leave on top and bottom sides of the widget.
The following resources are recognized by the indicator widgets:
minimumCount (class MinimumCount)
The minimum number of indicators to display in the dialog.
maximumCount (class MaximumCount)
The maximum number of indicators to display in the dialog.
Each button uses the following resources to customize its label:
label (class Label)
the string to display on the button.
font (class Font)
the font to use for this button label.
FILES
/usr/X11R6/lib/X11/app-defaults/SshAskpass
SEE ALSO
X(1), ssh(1), ssh-agent(1)
LICENSE
Some portions of x11-ssh-askpass are derived directly or indirectly from
portions of xscreensaver by Jamie Zawinski <jwz@jwz.org>, while others
are original works.
xscreensaver, Copyright © 1991-1999 Jamie Zawinski ⟨jwz@jwz.org⟩
Permission to use, copy, modify, distribute, and sell this software and
its documentation for any purpose is hereby granted without fee, provided
that the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting documen‐
tation. No representations are made about the suitability of this soft‐
ware for any purpose. It is provided "as is" without express or implied
warranty.
The remaining portions fall under the following copyright and license:
x11-ssh-askpass by Jim Knoble ⟨jmknoble@pobox.com⟩ Copyright ©
1999,2000,2001 Jim Knoble
Permission to use, copy, modify, distribute, and sell this software and
its documentation for any purpose is hereby granted without fee, provided
that the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting documen‐
tation.
Version 1.2.4.1 September 17, 2001 Version 1.2.4.1
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