contact.sh

基于UNIX的shell编程

#! /bin/sh
#<Contacts> 
#Version:1.0
#--Kay1531 Presents



#
#define function below
#
directory="data"
 #get the number of lines in the document
countLine() {
   	read str<data
	if [ "$str" = ""  ]
		then line=0
		else
			line=`wc -l data`
			line=${line%" data"}
	fi
	return $line
}
 
 #search by name
search() {
	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 record
add() {
	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 name
delete() {
	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 records
list() {
 	#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 records
sort() {
	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 " "
}

 #help
help() {
	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 info
op="y"
while [ "$op" != "n" ]
do

clear;
echo "----------------------------------------"
echo "----------------------------------------"
echo "<Contacts> Version:1.0"
echo "--Kay1531 Presents";
#choose menu
echo "---------------"
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;;
esac

echo "Continue or not(y/n): "
read op
done