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Shell Programming and Scripting
Grepping within nested for loops
Post 302278903 by Peggy White on Wednesday 21st of January 2009 12:24:55 PM
01-21-2009
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I have to to read files simultaneously in two nested loops,but am getting error can anyone do the needful.
useridFile=userIds.txt
fname=kiran.txt
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while read line
do
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USER_ID=$line
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You can use one while inside another?
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LEARN ABOUT OPENDARWIN
xephyr
Xephyr(1) General Commands Manual Xephyr(1) NAME
Xephyr - X server outputting to a window on a pre-existing X display SYNOPSIS
Xephyr [:display] [option ...] DESCRIPTION
Xephyr is a kdrive server that outputs to a window on a pre-existing "host" X display. Think Xnest but with support for modern extensions like composite, damage and randr. Unlike Xnest which is an X proxy, i.e. limited to the capabilities of the host X server, Xephyr is a real X server which uses the host X server window as "framebuffer" via fast SHM XImages. It also has support for "visually" debugging what the server is painting. OPTIONS
The server accepts all the standard options of Xserver(1) and the following additional options: -screen widthxheight sets the screen size. -parent id uses exiting window id . If a -screen argument follows a -parent argument, this screen is embedded into the given window. -host-cursor set 'cursor acceleration': The host's cursor is reused. This is only really there to aid debugging by avoiding server paints for the cursor. Performance improvement is negligible. SIGNALS
Send a SIGUSR1 to the server (e.g. pkill -USR1 Xephyr) to toggle the debugging mode. In this mode red rectangles are painted to screen areas getting painted before painting the actual content. The delay between this can be altered by setting a XEPHYR_PAUSE env var to a value in micro seconds. CAVEATS
o Rotated displays are currently updated via full blits. This is slower than a normal orientated display. Debug mode will therefore not be of much use rotated. o The '-host-cursor' cursor is static in its appearance. o The build gets a warning about 'nanosleep'. I think the various '-D' build flags are causing this. I haven't figured as yet how to work round it. It doesn't appear to break anything however. o Keyboard handling is basic but works. o Mouse button 5 probably won't work. SEE ALSO
X(7), Xserver(1) AUTHOR
Matthew Allum <mallum@o-hand.com> 2004 X Version 11 xorg-server 1.12.4 Xephyr(1)