read screen

[hamza]

hi
how can read screen dimensions as two variables(wxh)??
because the below command read it as a line wxh
xdpyinfo | grep 'dimensions:'

also where can I find complete reference for bash script with examples??

[DougieLawson]

Code: Select all

#!/bin/bash
SIZES=$(awk '/fbwidth/{ print $2 " " $3}' /proc/cmdline)

[B.Goode]

where can I find complete reference for bash script with examples??

man bash is comprehensive.

Or read the 'shell scripting' chapter in almost any book on using or administering a linux or unix system.

[Joe Schmoe]

man bash is comprehensive.

The problem is that, like "man gcc" or reading the C standards documents, reading it won't really tell you how to program in it. That comes only with experience.

Incidentally, in answer to the original question, this works for me:

Code: Select all

pi@raspberrypi ~ $ set -- \
$(xdpyinfo | gawk '/dimensions/ {sub(/x/," ",$2);print $2}')
pi@raspberrypi ~ $ echo $1 $2
1280 778
pi@raspberrypi ~ $ 

Note: I reformatted the above so that the line wouldn't break on the main line. The point is that you convert the "x" into a single space. That wasn't made clear in the original rendering.