need help with a command line please[SOLVED]

[Logansfury]

Hello everyone,

I am almost done with my Display conky widget. I need some help getting info from xrandr output. The first line relating to port 2 will be either

HDMI-A-1 connected 2560x1440+2560+0

or HDMI-A-1 disconnected

I need a command one-liner to check if HDMI-A-1 says connected or disconnected. If disconnected print "No monitor detected", if connected, print $3 but strip the "+2560+0" from the end.

The closest my online resource can come up with is:

Code: Select all

${exec xrandr --query | grep 'HDMI-A-1 connected' >/dev/null && xrandr --query | grep 'HDMI-A-1 connected' | awk '{print $3}' || echo "No monitor detected" | sed 's/+2560+0//'}

Can anyone please come up with a working script?

Thank you,

Logan

[xenopeek]

Code: Select all

res=$(xrandr | sed -rn 's/^HDMI-A-1 connected [^0-9]*([0-9x]*).*$/\1/p'); echo "${res:-No monitor detected}"

[Logansfury]

Code: Select all

res=$(xrandr | sed -rn 's/^HDMI-A-1 connected [^0-9]*([0-9x]*).*$/\1/p'); echo "${res:-No monitor detected}"

Hey Xenopeek!

Swift and decisive

This command worked across the board for all of my inputs:

Code: Select all

logansfury@OptiPlex-5040:~$ res=$(xrandr | sed -rn 's/^HDMI-A-1 connected [^0-9]*([0-9x]*).*$/\1/p'); echo "${res:-No monitor detected}"
2560x1440
logansfury@OptiPlex-5040:~$ res=$(xrandr | sed -rn 's/^HDMI-A-0 connected [^0-9]*([0-9x]*).*$/\1/p'); echo "${res:-No monitor detected}"
2560x1440
logansfury@OptiPlex-5040:~$ res=$(xrandr | sed -rn 's/^DisplayPort-0 connected [^0-9]*([0-9x]*).*$/\1/p'); echo "${res:-No monitor detected}"
No monitor detected
logansfury@OptiPlex-5040:~$

Thank you so much!

[Koentje]

That's a nifty piece of code! echo "${res:-No monitor detected}"

[xenopeek]

That's a nifty piece of code! echo "${res:-No monitor detected}"

Shell parameter expansion section of the bash manual has gems like that: https://www.gnu.org/software/bash/manua ... nsion.html

[Logansfury]

That's a nifty piece of code! echo "${res:-No monitor detected}"

Shell parameter expansion section of the bash manual has gems like that: https://www.gnu.org/software/bash/manua ... nsion.html

Bless yer heart for sharing such gems