11-13-2014
The reason for the behaviour you describe is that xargs and the assignment are being run in a subshell whose environment is not passed back to the parent process.
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oclock(1X) oclock(1X)
NAME
oclock - round X clock
SYNOPSIS
oclock [-option...]
OPTIONS
choose a different color for the both hands and the jewel of the clock choose a different color for the background. choose a different
color for the jewel on the clock. choose a different color for the minute hand of the clock. choose a different color for the hour hand
of the clock. selects an appropriate level of backing store. define the initial window geometry; see X(1X). specify the display to use;
see X(1X). choose a different color for the window border. choose a different width for the window border. As the Clock widget changes
its border around quite a bit, this is most usefully set to zero. causes the clock to use the Shape extension to create an oval window.
This is the default unless the shapeWindow resource is set to false. causes the clock to not reshape itself and ancestors to exactly fit
the outline of the clock. causes the clock to consist only of the jewel, the hands, and the border.
DESCRIPTION
The oclock program simply displays the current time on an analog display.
COLORS
If you would like your clock to be viewable in color, include the following in the #ifdef COLOR section you read with xrdb: *customization:
-color
This will cause oclock to pick up the colors in the app-defaults color customization file: <XRoot>/lib/X11/app-defaults/Clock-color. Below
are the default colors:
Clock*Background: grey Clock*BorderColor: light blue Clock*hour: yellow Clock*jewel: yellow Clock*minute: yellow
SEE ALSO
X(1X), X Toolkit documentation
AUTHOR
Keith Packard, MIT X Consortium
oclock(1X)