Here is my time machine drawing for Charles new ebook. I don’t get to draw often anymore, but It was kind of neat seeing how much illustrator has grown up since I last used it for this kind of thing. The orginal design was found on the internet by charles and can be found here, and my version can be found here. Why am I posting it, I don’t know, along time ago I wanted to be an artist and now all I have is this and an album or too elsewhere.

I would have used his but I am writing something in python that needed this directly and I did not want to call an external command.

-Z

https://github.com/acidprime/system-type

This little binary will tell you if you have a Laptop or Desktop.
It reads this value using the system-type in IOKit (IOPlatformExpertDevice).
You can parse this value your self using the ioreg (-l) command but Its not
formatted well, so I decided to make this as its a pretty common request.
For instance I once had a school district that wanted to turn off wireless
on all Desktops as they were having MYNAME(37) bonjour name conflict issues.

There is a little example.command shell script to show you the two ways you
would use this in your scripts. laptops are value 2 (exit 1) and Desktops are
value 1 (exit 0). The exit values allow you to use standard logic built-in to
run the command and use its exit value. Or if you think thats lame you can
parse the text. To each there own but I like exit values

Known Issues:
As I recall this does not cover PowerPC machines, but I have not seen an intel
that does not use this value. Maybe iPad 3 will be 3 ;)

To Do:
I will make a little installer for it as some point and put it in
/usr/local/bin/system-type
Could use some options as well such as controlling behaviour
Maybe XML output, and put some other values?

Replacement for:

#!/bin/bash
declare -x awk="/usr/bin/awk"
declare -x ioreg="/usr/sbin/ioreg"
# Intel and future systems test
declare IOREG="$("$ioreg" -l |
	"$awk" 'BEGIN {FS="[<>]"}
	/.*\"system-type\".=./{
	systype=$2
	if ( systype == 1 )
		{ print "D" ; exit 0 }
	# System type 1 is a Desktop
	else if ( systype == 2 )
		{ print "L" ; exit 0 }
	# System type 2 is a Laptop
	}')"

Here is the sample NSStatusItem Application
mentioned in my slides at Mac Tech Conf 2011 can be found here:

https://github.com/acidprime/StatusItem/downloads

txmt://open?url=file:///Applications/TextMate.app/Contents/Resources/Info.plist&line=&column=36
Here is an example of this link
There is a quick blog post about it here on their site. All in all I can see some pretty cool ideas for this, such as what I am big fan of which is interactive documentation. I am a big URL nerd and to mention one other cool one I knew about previously is transmit’s transmitreg:// which they use for serial numbers ,an awesome way to fill in serials that every vendor should do.

-(BOOL)evaluateCheckBox:(NSButton *)evalButton
{
	// Gather data from interface
	if ( [evalButton state] == NSOnState ){
		return YES;
	}
	if ( [evalButton state] == NSOffState ){
		return NO;
	}
}

Well its official , I will be speaking at the European Macintosh System Administrators Meeting 2011 in Göteborg, Sweden. Check out the details here.

#!/bin/bash
declare -x SCRIPT_PATH="$0"
declare -x SCRIPT_NAME="${0##*/}"

echo $SCRIPT_PATH

echo $SCRIPT_NAME

A more raw example (Same Output):

#!/bin/bash
echo $0
echo ${0##*/}

Output:

/Users/acid/Dropbox/code/bash/scriptname.sh
scriptname.sh

Here is a little loop that can exclude folders, I started it for some find
code that would exclude "system" files during a permissions change.
#!/bin/bash
OLDIFS="$IFS"
IFS=$'\n'
for FOLDER in /* ; do
 [ -L "$FOLDER" ] && continue
 if [ -d "$FOLDER" ] ; then
 if  [ "$FOLDER" != '/Volumes' ] &&
 [ "$FOLDER" != '/System' ] &&
 [ "$FOLDER" != '/Network' ] &&
 [ "$FOLDER" != '/Recycled' ] &&
 [ "$FOLDER" != '/cores' ] &&
 [ "$FOLDER" != '/dev' ] &&
 [ "$FOLDER" != '/net' ]
 then
 echo "$FOLDER"
 fi
 fi
done
IFS="$OLDIFS"

#!/bin/bash
declare -x who="${who:="/usr/bin/who"}"
declare -x awk="${awk:="/usr/bin/awk"}"
declare -xi CONSOLE_USERS="$($who |
		$awk '/.*console/{++n}END{print n}')"
declare -x CONSOLE_USER="$($who |
		$awk '/console/{print $1;exit}' )"
if [ $CONSOLE_USERS -eq 0 ] ; then
	echo "No console users present"
else
	echo "$CONSOLE_USER is logged in"
fi