#! /bin/sh#<Contacts> #Version:1.0#--Kay1531 Presents##define function below#directory="data" #get the number of lines in the documentcountLine() {   	read str<data	if [ "$str" = ""  ]		then line=0		else			line=`wc -l data`			line=${line%" data"}	fi	return $line}  #search by namesearch() {	clear;	echo "------------" 	echo "find a record"	echo "------"	echo "enter the name:"	read name	#find the record	str=`grep -n /$name/ data`	#get the number	num=${str#*:'/'*'/'}	num=${num%'/'}	echo " "	#already exists	if [ "$str" != "" ] 		then echo "name: " $name		     echo "phone number: "  $num		#not exist,add the record	else  				echo "record not found!"		fi	echo " "} #add a recordadd() {	clear;	echo "------------" 	echo "add a record"	echo "------"	echo "enter the name:"	read name	#find the record	str=`grep -n /$name/ data`	#get the number	num=${str#*:'/'*'/'}	num=${num%'/'}	#get the sequence number of that record	seq=${str%%':'*}	#already exists	if [ "$str" != "" ] 		then echo  $name"("$num")"" already exits"		     echo "continue to edit or back? (y/n):"		     read yn		     #update the number		     if [ $yn = "y" ]			then echo "enter the new number:"  			read num			#get the number of total lines			countLine				line=$?			#delete the previous record				sed  -i "$seq d" data			#insert the present record			echo $line" "$seq			if [  $line -eq $seq ]				then					echo "/"$name"/"$num"/">>data				else					sed  -i "$seq""i "/"$name"/"$num"/ data			fi		     #back without change		     else return 0				     fi  	#not exist,add the record	else  				echo "enter the number:"			read num		#add the record		countLine			line=$?		if [ $line -eq 0 ]			then echo "/"$name"/"$num"/">data		else echo "/"$name"/"$num"/">>data		fi	fi} #delete a record by namedelete() {	clear;	echo "------------" 	echo "delete a record"	echo "------"	echo "enter the name:"	read name	#find the record	str=`grep -n /$name/ data`	#get the number	num=${str#*:'/'*'/'}	num=${num%'/'}	#get the sequence number of that record	seq=${str%%':'*}	#already exists	if [ "$str" != "" ] 		then echo  $name"("$num")"" already exits"		     echo "comfirm to delelte? (y/n):"		     read yn		     #delelte		     if [ $yn = "y" ]			then echo "delete this record!"  			sed  -i "$seq d" data		     #back without change		     else return 0				     fi  	else	echo"" 		echo "record not found!"		echo""	fi} #list all the recordslist() { 	#get the number of lines	countLine		line=$?	#list records	echo " "	if [ $line -ne 0 ]		then			echo "=Record List="			cat "data" | while read str			do				if [ $line -ne 0 ] 					then						#get the number						name=${str%'/'*'/'}						name=${name#'/'}						num=${str#'/'*'/'}						num=${num%'/'}						echo $name" "$num					        line=`expr $line - 1` 				fi			done	else echo "no record!"	fi	echo " "} #sort all the recordssort() {	awk '{print $1,$2|"sort -k 1"}' data > temp 	#get the number of lines	countLine		line=$?	#list records	echo " "	if [ $line -ne 0 ]		then			echo "=Record List="			cat "temp" | while read str			do				if [ $line -ne 0 ] 					then						#get the number						name=${str%'/'*'/'}						name=${name#'/'}						num=${str#'/'*'/'}						num=${num%'/'}						echo $name" "$num					        line=`expr $line - 1` 				fi			done	else echo "no record!"	fi	echo " "} #helphelp() {	clear	echo "==help=="	echo ">search    (f) input a name,search the record."	echo ">add       (a) input a name,add the record,if already exists,choose to modify or not." 	echo ">delete    (d) input a name,delete the record."	echo ">list      (l) list all the records."	echo ">sort      (s) list all the records according to sequence of name."	echo ">help      (h) show help infomation."	echo " "}##function defined above###main body##show welcoming infoop="y"while [ "$op" != "n" ]doclear;echo "----------------------------------------"echo "----------------------------------------"echo "<Contacts> Version:1.0"echo "--Kay1531 Presents";#choose menuecho "---------------"echo "==Menu=="echo ">search    (f)"echo ">add       (a)"echo ">delete    (d)"echo ">list      (l)"echo ">sort      (s)"echo ">help      (h)"echo "---------------"echo "Please select:"read menu;case $menu in	"f")search;;	"a")add;;	"d")delete;;	"l")list;;	"s")sort;;	"h")help;;esacecho "Continue or not(y/n): "read opdone