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Anior
Guru
Joined: 17 Apr 2003
Posts: 317
Location: European Union (Stockholm / Sweden)
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 Posted: Wed Nov 05, 2003 9:45 pm Post subject: Displaying your laptops battery state in the bash prompt. |
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Since I've been a frequent leecher in this forum for quite a while now I thought that it where time to try to write something of my own.
The thing I forget most frequently is pluggin in my laptops AC adapter when I arrive at school.
It's fairly new so the battery will keep it alive til just before I'm comming back from lunch.
So I decided to display my current battery charge in the bash prompt.
Resulting in something like this:
| Code: | [10:21:00][Wed Nov 05][niklas@gentootop][Battery: 96%]
[~] >
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I started out by writing the small script that will display your battery charge
I recomend saving this one to /usr/bin/battery for easy access.
| Code: | #!/bin/bash
if [ -e /proc/acpi/battery/BAT0/ ]
then
path="/proc/acpi/battery/BAT0"
elif [ -e /proc/acpi/battery/BAT1/ ]
then
path="/proc/acpi/battery/BAT1"
else
echo "No batteri found. Make sure that you have acpi support in your kernel"
echo "and that the computer actually is a laptop :)"
exit 1
fi
full=`cat $path/info|grep 'last full capacity'|awk -F: '{print $2}'|awk -Fm '{print $1}'`
current=`cat $path/state|grep 'remaining capacity'|awk -F: '{print $2}'|awk -Fm '{print $1}'`
state=$(( current * 100 / $full))
echo "Battery: $state%" |
Of course you have to chmod +x /usr/bin/battery (or whatever you saved it to).
Now open up your ~/.bashrc if you just want to set it for the current user or /etc/profile for a global prompt.
Look for a line that starts with "export PS1="
Replace that one with:
| Code: | | PS1="\[\033[1;34m\][\[\033[1;37m\]\T\[\033[1;34m\]]\[\033[1;34m\][\[\033[1;37m\]\d\[\033[1;34m\]][\[\033[1;37m\]\u\[\033[1;34m\]@\[\033[1;37m\]\H\[\033[1;34m\]][\033[1;37m\`/usr/bin/battery\`\033[1;34m]\n[\[\033[1;37m\]\w\[\033[1;34m\]] > \[\033[1;0m\]" |
Then edit the prompt to less/more bulk as you see fit.
The prompt where created by AnarchE here on the forum. I found it quite nice so I use it on all three of my gentoo machines. Hope that he doesn't mind that I include it here aswell.
A nice thread about prompt editing can be found here.
Last edited by Anior on Wed Nov 05, 2003 10:39 pm; edited 1 time in total |
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Qball
Apprentice
Joined: 25 Nov 2002
Posts: 196
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| Posted: Wed Nov 05, 2003 10:16 pm Post subject: |
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I like this .. gonna use it on my laptop aswell.
I wrote a while back a small C app to check on battery/cpu temp on my laptop. (overkill I know, but its darn usefull)
you can find that here: http://qballcow.nl/test/index.php?s=37
sample output:
| Code: | -----------------21:19:46-----------------
The processor temp: 43 Degrees.
Battery is discharging
|####################| 100% Left.
Remaining: 03:27 (with current load)
------------------------------------------ |
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