setting background image by shell command?
fatkasuvayu+linux at gmail.com
Wed May 1 11:13:54 CEST 2013
On Wed, May 01, 2013 at 04:03:29AM +0200, houghi wrote:
> Question: I know how many screens I have, but how could I find this out
> with a bash script? I do not mean running `echo $DISPLAY` on each and then
> looking what the highest number is. I mean that I should get an output of
> 4 (or 3 if it starts counting from 0) with my 4 screens and if I have 2 on
> another system, I get the answer 2 with the same script/command.
How about asking xrandr?
$ xrandr -q
Screen 0: minimum 320 x 200, current 2960 x 1050, maximum 8192 x 8192
LVDS1 connected primary 1280x800+1680+0 (normal left inverted right x axis y axis) 261mm x 163mm
1280x800 60.0*+ 50.1
800x600 60.3 56.2
VGA1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
1680x1050 59.9*+ 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9
1024x768 75.1 60.0
800x600 75.0 60.3 56.2
640x480 75.0 60.0
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
The first line tells you the screen number. Now I'm not sure if it
tells you only about the X screen xrandr was called from or all X
screens running on the system. Not sure what would be the best way to
find out the number of monitors for each screen though.
Hope this helps,
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