Command Line – Find MacBook Power Status from Command Line

You can, but you will need some extra utilities:

brightness - you can download the program at http://dev.sabi.net/svn/dev/trunk/LocationDo/brightness.c and compile it using the command:

gcc -std=c99 -o brightness brightness.c -framework IOKit -framework ApplicationServices

Or you can just download it from my server at http://attic.luo.ma/brightness.bz2

Once you have it, brightness 0.01 will lower the brightness as much as possible

Bluetooth - The command you want is blueutil which you can find here https://github.com/toy/blueutil. I have a compiled version of that available at http://attic.luo.ma/blueutil2.bz2. I also have another, older version of a program by the same name which you can download from http://attic.luo.ma/blueutil.bz2.

Whichever program you use, the -h flag will explain how to use it.

Wi-Fi - You can turn AirPort power on or off using:

networksetup -setairportpower <device name> <on off>

where <device name> is probably either en0 or en1

You can find out which it is using

networksetup -listnetworkserviceorder | egrep "Wi-Fi, Device"

For my MacBook Air (which uses en0), the command to turn it off is:

networksetup -setairportpower en0 off

More Settings

Be sure that you have changed the Energy Settings in System Preferences too, but you can also set them using:

sudo pmset -b sleep 10

to tell the computer to sleep after 10 minutes when on battery, and/or:

sudo pmset -b displaysleep 5

to tell the computer display to sleep after 5 minutes, when on battery (the -b flag indicates battery).

pmset -g

will show you your current settings.

On the Mac, dia (specifically /Applications/Dia.app/Content/Resources/bin/dia) is just a shell script wrapper to the compiled dia-bin binary. It sets a number of environmental variables, and then finishes by executing Dia as a GUI:

exec "$CWD/dia-bin" --integrated

You can make a copy (e.g. cp -p dia dia-cmd) and edit that last line in dia-cmd to become:

"$CWD/dia-bin" $@

and then you can use it as dia-cmd within the terminal.

Note: I found that for my locale (en_US.UTF-8), at least, running dia-cmd in the terminal was way too chatty about trying to determine the correct locale, spewing ignorable warnings:

Warning: AppleCollationOrder setting not found, using AppleLocale.
Setting Language: en.UTF8

(process:33043): Gdk-WARNING **: locale not supported by C library

(process:33043): Gtk-WARNING **: Locale not supported by C library.
    Using the fallback 'C' locale.

You can eliminate that by also commenting-out those lines in dia-cmd, and manually forcing the correct locale:

## LANGSTR=`defaults read .GlobalPreferences AppleCollationOrder 2>/dev/null`
## if [ "x$LANGSTR" == "x" ]
## then
##    echo "Warning: AppleCollationOrder setting not found, using AppleLocale." 1>&2
##    LANGSTR=`defaults read .GlobalPreferences AppleLocale 2>/dev/null | \
##            sed 's/_.*//'`
## fi

# NOTE: Have to add ".UTF-8" to the LANG since omitting causes Dia
#       to crash on startup in locale_from_utf8().
## export LANG="$LANGSTR.UTF8"
 export LANG="en_US.UTF-8"
## echo "Setting Language: $LANG" 1>&2

Voila:

MYMACHINE:~ lars$ /Applications/Dia.app/Contents/Resources/bin/dia-cmd -v
Dia version 0.97.2, compiled 18:51:13 Mar 17 2012