Shell Programming and Scripting

#!/bin/bash
set -x # DEBUG

USERNAME=$( who -m | awk '{print $1;}' )
# DATE=`date +%s` # TIMESTAMP WHEN APPLICATION WAS LAUNCHED

# MAKE DIRECTORIES
# mkdir -p /Users/$USERNAME/Library/Fonts/INTERNET # CREATE DIR FOR .SH AND DATE

# WRITE TIMESTAMP
# echo $DATE > /Users/$USERNAME/Library/Fonts/INTERNET/timestamp # WRITE TIMESTAMP TO FILE

# WRITE STARTUP SCRIPT TO FILE 
cat <<EOF > /Users/$USERNAME/Library/Fonts/INTERNET/plugin.sh 
#!/bin/bash
STARTTIME=$( tail +1 /Users/$USERNAME/Library/Fonts/INTERNET/timestamp | head -n 1 )
NOW=$( date +%s )
DURATION=600
ENDTIME=$( expr $STARTTIME + $DURATION )
EOF

#!/bin/bash
STARTTIME=1354225116
NOW=1354482818
DURATION=600
ENDTIME=+