I have one plist associated with this launchd agent. There is one agent listed in launchctl list, and it calls my bash script, called rc.wakeup, whenever the mac is woken up from sleep. There is only one copy of this bash script. The code in the bash script is not repeated. Despite this, the bash script is being executed twice in its entirety. Why?
I have created an install bash script and an uninstall bash script. I have been executing these in series an an attempt to get both scripts working so this program can be used by anyone. I believe improperly installing/uninstalling these files has caused the problem, although I have no idea why it would.
Here is the plist:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>de.bernhard-baehr.sleepwatcher</string>
<key>ProgramArguments</key>
<array>
<string>/usr/local/sbin/sleepwatcher</string>
<string>-V</string>
<string>-s /etc/rc.sleep</string>
<string>-w /etc/rc.wakeup</string>
</array>
<key>RunAtLoad</key>
<true/>
<key>KeepAlive</key>
<true/>
</dict>
</plist>
Here is the install script I use to install the program:
#!/bin/bash
sudo mkdir -p /usr/local/sbin /usr/local/share/man/man8
sudo cp ~/Desktop/mysecureview/sleepwatcher_2.2/sleepwatcher /usr/local/sbin
sudo cp ~/Desktop/mysecureview/sleepwatcher_2.2/sleepwatcher.8 /usr/local/share/man/man8
mkdir ~/mysecureview
mkdir ~/mysecureview/log
mkdir ~/mysecureview/pics
cp ~/Desktop/mysecureview/imagesnap-master/imagesnap ~/mysecureview/imagesnap
mkdir ~/Library/LaunchAgents
cp ~/Desktop/mysecureview/sleepwatcher_2.2/config/de.bernhard-baehr.sleepwatcher-20compatibility.plist ~/Library/LaunchAgents/de.bernhard-baehr.sleepwatcher-20compatibility.plist
launchctl load ~/Library/LaunchAgents/de.bernhard-baehr.sleepwatcher-20compatibility.plist
sudo cp ~/Desktop/mysecureview/sleepwatcher_2.2/config/rc.wakeup /etc/rc.wakeup
sudo cp ~/Desktop/mysecureview/sleepwatcher_2.2/config/rc.wakeup /etc/rc.sleep
cp ~/Desktop/mysecureview/num.txt ~/mysecureview/num.txt
cp ~/Desktop/mysecureview/logs.txt ~/mysecureview/logs.txt
cp ~/Desktop/mysecureview/compile.bash ~/mysecureview/compile.bash
cp ~/Desktop/mysecureview/uninstall ~/mysecureview/uninstall
mkdir ~/mysecureview/logs.txt
echo "========================"
echo "~Installation Succesful~"
echo "========================"
here is the uninstallation script:
#!/bin/bash
launchctl unload ~/Library/LaunchAgents/de.bernhard-baehr.sleepwatcher-20compatibility.plist;
rm ~/Library/LaunchAgents/de.bernhard-baehr.sleepwatcher-20compatibility.plist
sudo rm /etc/rc.wakeup
sudo rm /etc/rc.sleep
sudo killall sleepwatcher
sudo rm -rf /Library/StartupItems/SleepWatcher
launchctl unload de.bernhard-baehr.sleepwatcher
launchctl remove de.bernhard-baehr.sleepwatcher
rm ~/mysecureview/num.txt
rm ~/mysecureview/compile.bash
rm ~/mysecureview/imagesnap
rm ~/mysecureview/logs.txt
for i in {1..100}
do
p=".txt"
x="$i$p"
rm ~/mysecureview/log/$x
done
rmdir ~/mysecureview/log
echo "====================="
echo "~Uninstall Successful"
echo "====================="
Here is the actual script being executed when the computer is woken up:
for user in `echo 'show State:/Users/ConsoleUser' | scutil | awk '/kCGSSessionUserNameKey/ { print $3 }'`; do
home=`eval echo ~$user`
if [ -x "$home/.wakeup" ]; then
logger -t $0 "executing .wakeup of user $user"
su - $user -c "$home/.wakeup"
fi
done
#The following is the MySecureView script used to capture the picture and its information.
cd ~/mysecureview
# take a picture.
./imagesnap
#get the log index. Create a variable for and iterate the index.
numPics=$(cat ~/mysecureview/num.txt)
numPics=$[numPics+1]
jpg=".jpg"
index="$numPics$jpg"
#We only allow 100 log entries to exist at a time.
if [ $numPics == 100 ]; then
numPics=1
fi
#temp storage for the newest picture.
cp ~/mysecureview/snapshot.jpg ~/mysecureview/pics/$index
rm ~/mysecureview/snapshot.jpg
rm ~/mysecureview/date.txt
# temporary storage for the most recent log entry.
date=$(date)
entry="$numPics $date"
logNum="$numPics.txt"
echo "$entry" > ~/mysecureview/log/$logNum
#store the index for next use.
echo "$numPics" > ~/mysecureview/num.txt
#compile each and every log entry .txt file into the logs.txt file.
bash compile.bash
Best Answer
There's a lot going on here.
You've got a daemon called SleepWatcher 2.2 which is being kept alive by
launchd
. It supposedly runs your/etc/wakeup.rc
script on computer wake. Your script then calls the programimagesnap
.Your script is being executed twice. I'd first look at
launchctl list
and thenps
to see if SleepWatcher is running two instances. If not, then I'd point the finger at SleepWatcher calling the on-wake script twice.Unless you want to dig into SleepWatcher's source, you will need to make your script resilient to multiple calls. Maybe
touch
ing a lock file at the beginning of execution and removing it some seconds after completion? Your script would then check for the existence of this lock file and abort if it exists.PS: I'd put your
wakeup.rc
file somewhere in the user's home folder, not in system-wide/etc
because it's a user-level launchd agent, not a root-level one. Maybe~/mysecureview/.wakeup
.