Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris

Checking Laptop battery info

by /dev/trash (Curate)
on Jul 09, 2006 at 03:07 UTC ( [id://559977] : CUFP . print w/replies, xml ) Need Help??

This is a simple piece of Perl I wrote to see what percentage my laptop battery was. The die needs to be more descriptive and I also need to take out the hardcoded values for a full battery, but it gets the job done faster than cat and scanning.
#!/usr/bin/perl use warnings; use strict; use diagnostics; my $status; open (BATT, "/proc/acpi/battery/BAT0/state") || die("Can't Open: $!"); while (<BATT>) { if ($_ =~ /(charging state:)(\s+)(\w+)/ ) { $status = $3; } if ($_ =~ /(:)(\s+)(\d*)(\s+)(mAh)/ ) { print "\n"; my $perc = $3/2791; printf "The battery is %s", $status; print "\n"; printf "Battery percentage is: %.0f", $perc*100; print "\n-----------------------------\n\n"; } else { print "Incorrect Format"; } } close BATT;

Replies are listed 'Best First'.
Re: Checking Laptop battery info
by stonecolddevin (Parson) on Jul 09, 2006 at 09:17 UTC
    what would it take for something like this to be done for windows/mac?

        Micro$oft does have VBS code, which can serve as a starting point. After all, translating from VBS to Perl should be easy &foolish_grin;

        Microsoft scripting center


        e(π√−1) = −1

      For win you could do something like this:

      #!/usr/bin/perl -l use Win32::OLE('in'); my $objWMIService = Win32::OLE->GetObject("winmgmts:\\\\.\\root\\cimv2 +") or die "WMI connection failed.\n"; $colItems = $objWMIService->ExecQuery("Select * from Win32_Battery","W +QL",0x30); print "$_->{DeviceID} ($_->{Description}): $_->{EstimatedChargeRemaini +ng}%" for in $colItems;

      Of course, I get percentages greater than 100% when I'm plugged in so it isn't completely ideal. =/

        well it's most certainly a start. if nothing else i can be like, "hey dad, check this out" :-)

        might even be able to play around with it and see what the problem is with the percentages...