Finished tape rotate script

taperotate.sh

@@ -5,18 +5,51 @@
 # Rotate tapes
 
 TapeFile=tape.txt
-Tape=`tail -n1 $TapeFile | awk '{ print $5 }'`
 HowMany=6
 TimeStamp=`date "+%F %X --> "`
 
+# Parse command line options
+while getopts i:h Opt; do
+	case "$Opt" in
+	i) printf "$TimeStamp Tape ${OPTARG}\n" >> $TapeFile
+	   exit 0
+	   ;;
+	h) printf " Usage: `basename $0` -i <int> -h\n"
+	   printf " -i Initalize (or start over) with this tape number\n"
+	   printf " -h This help screen\n"
+	   exit 0
+	   ;;
+	*) printf "Unknown opton, see -h (help) for more information\n"
+	   ;;
+	esac
+done
 
+# Check if file exist
+if [ ! -e $TapeFile ]; then
+	printf "$TapeFile dosen't exist, please use the -i option to init it\n"
+	exit 2
+fi
+
+Tape=`tail -n1 $TapeFile | awk '{ print $5 }'`
+
+# Check if file contains tape data
+if [[ $Tape != [0-9] ]]; then
+	printf "$TapeFile dosen't seem to contain tape data\n"
+	printf "Use -i <int> to initizalize tape date\n"
+	printf "See help (-h) for more information\n"
+	exit 2
+fi
+
+# Once we reach the latest tape, rotate
 if [ $Tape -ge $HowMany ]; then
 	Tape=0
 fi
 
+# Else add 1 to the tape number
 Tape=$((Tape+1))
 
-printf "$TimeStamp Tape $Tape\n"
+# Print it to file
+printf "$TimeStamp Tape $Tape\n" >> $TapeFile
 
 
 exit 0