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Full Discussion: awk or sed to determine battery percentage
Top Forums Shell Programming and Scripting awk or sed to determine battery percentage Post 302391553 by TonyFullerMalv on Monday 1st of February 2010 06:09:02 PM
Old 02-01-2010
Sample code to give you a percentage (assumes you have obtained the values into the CURRENT_CHARGE and BATTERY_CAPACITY variables, e.g.:
Code:
CURRENT_CHARGE=`system_profiler SPPowerDataType | grep "Charging status" | awk '{ print 4}'`

Sample code:
Code:
CURRENT_CHARGE=1020
BATTERY_CAPACITY=5242

PERCENT_CHARGED=`echo "scale=3; ${CURRENT_CHARGE} / ${BATTERY_CAPACITY} * 100" | bc`
echo "PERCENT_CHARGED = ${PERCENT_CHARGED}%"

Running a script containing the above code produces the output:
Code:
$ ./percent_calc_script.sh
PERCENT_CHARGED = 19.400%

 

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LEARN ABOUT OSX

trace

TRACE(1)						    BSD General Commands Manual 						  TRACE(1)

NAME

     trace -- configure and record kernel trace events

SYNOPSIS

     trace -h

     trace -i [-b numbufs]

     trace -g

     trace -d [-a pid | -x pid]

     trace -r

     trace -n

     trace -e [-c class [-p class] [-s subclass]] [-a pid | -x pid] [-k code | -k code | -k code | -k code]

     trace -E [-c class [-p class] [-s subclass]] [-a pid | -x pid] [-k code | -k code | -k code | -k code] executable_path
	   [optional args to executable]

     trace -t [-R rawfile] [-o OutputFilename] [-N] [ExtraCodeFilename1 ExtraCodeFilename2 ...]

DESCRIPTION

     The trace command allows developers to initialize and configure the kernel trace subsystem. Trace events can be recorded to an in-memory buf-
     fer, or logged directly to a file. Raw data files can later be decoded to a plaintext format.

SEE ALSO

     fs_usage(1), sc_usage(1), latency(1), top(1)

Mac OS X							 October 28, 2010							  Mac OS X
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