替换函数求解

[blueskysee]

我想写个简单的替换函数。
替换的文件为database.ini 内容如下
[Database]
Address="localhost"
Login="root"
Password="123"
Database="nl_receive"
Connections="10"
EncryptPassword="no"

我的函数很简单，就向想把字段替换掉

我的函数为：
vi sed.sh
sed()
{
if [ $# -ge 3 ]
then
sed -i 's/$2/$3/g' $1
else
echo "you config errror! "
fi
}

[root@localhost ~]# ./sed.sh database.ini nl_receive aaa 运行的时候没把字段改过来，不知道是怎么回事

[blueskysee]

主席，脚本之前已经弄好了，我是想写个函数，然后传递参数给我写的函数。

如果直接用脚本的话，就不是我的目的了。

启用关键字是我的失误，本来我是test.sh

[steptodream]

sed()
{
if [ $# -ge 3 ]
then
sed -i 's/$2/$3/g' $1
else
echo "you config errror! "
fi
}

这就是你的脚本内容吗 你把处理写成函数sed() 可是你根本没调用啊 而且你的函数名还用关键字
而且sed里用shell变量也不对
修改如下

#!/bin/bash
if [ $# -ge 3 ]
then
    sed -i -e 's/'"$2"'/'"$3"'/g' $1
else
    echo "you config errror! "
fi

[yangyinbo]

[Quote=引用 2 楼 blueskysee 的回复:]

主席，脚本之前已经弄好了，我是想写个函数，然后传递参数给我写的函数。

如果直接用脚本的话，就不是我的目的了。

启用关键字是我的失误，本来我是test.sh
[/Quote]

#!/bin/sh
#add key=value
add()
{
addfile=$1
echo $queryfile
echo "Please input key and vlaue like key=value:"
while read add_key
do
	#key_value is not null and can not be start with "#"
	if [ -n "$add_key" ]
	then
		suffix=`echo "$add_key" | cut -d= -f2`
		prefix=`echo "$add_key" | cut -d= -f1`
		if [ ${add_key%=*} = "$prefix" -a ${add_key#*=} = "$suffix" ]
		then
		count=`cut -d= -f1 $addfile | grep -w $(echo $add_key | cut -d= -f1) | wc -l`
			echo "count : $count"
			if [ "$count" -gt 0 ]
			then
				echo "the $add_key is exist!"
				echo "add $add_key to $addfile falid!"
				break;
			else
				echo "$add_key" >> $addfile
				echo "add $add_key to $addfile successful!"
				break;
			fi
		else
			echo "${add_key} format is error"
			exit 3;
		fi
	fi
		
done

}
#update key=value
update()
{
updatefile=$1
echo "Please input key and vlaue like key=value:"
while read update_key
do
	#key_value is not null and can not be start with "#"
	if [ -n "$update_key" ]
	then
		prefix=`echo "$update_key" | cut -d= -f1`
	#	echo "prefix is $prefix"
		suffix=`echo "$update_key" | cut -d= -f2`
	#	echo "suffix is $suffix"
		prefix=`echo "$update_key" | cut -d= -f1`

	#	echo ${update_key%=*}
	#	echo ${update_key#*=}
		if [ ${update_key%=*} = "$prefix" -a ${update_key#*=} = "$suffix" ]
		then
			count=`cut -d= -f1 $updatefile | grep -w $prefix | wc -l`
			echo "count : $count"
			if [ "$count" -gt 0  -a "$count" -eq 1 ]
			then
			sed 's/\("$prefix"\)=[0-9a-zA-Z]*/\1="${suffix}"/g' < $updatefile > $updatefile$$
				mv $updatefile$$ $updatefile
				echo "Update $updatefile successful!"
				break;
			else
				echo "$updatefile has no entry for $update_key or \
too more entryin $updatefile!"
				break;
			fi
		else
			echo "${update_key} format is error"
			break;
		fi
	fi
		
done

}
#del key=value
del()
{
delfile=$1
echo 'Please input the key for delete:'
while read query_key
do
	if [ -n "$query_key" ]
	then
		echo "The query resut is:"
		cat $delfile | grep -v -w $query_key > $delfile$$
		mv  $delfile$$ $delfile
		echo "Delete $key successful!"				
		break;
	fi
done 
}
#query key=value
query()
{
queryfile=$1
echo $queryfile
echo 'Please input the key for query:'
while read query_key
do
	if [ -n "$query_key" ]
	then
		echo "The query resut is:"
		cut -d= -f1,2 $queryfile | grep -w $query_key
		break;
	else 
		echo "Please input the key for query:"	
	fi
done 
}


#args check
check ()
{
file=$1
#check the operation file
if [ -f "$file" -a -e "$file" ]
then
	:
else
	echo "$file is a normal file or $file is not exsit !"
	exit 2;
fi
#check the operation file's format,the format should be 'key=value'
while read key_value 
do
	#key_value is not null and can not be start with "#"
	if [ -n "$key_value" -a "X${key_value%%#*}" != "X" ]
	then
	#	echo "key_value is $key_value"
		suffix=`echo "$key_value" | cut -d= -f2`
	#	echo "suffix is $suffix"
		prefix=`echo "$key_value" | cut -d= -f1`
	#	echo "prefix is $prefix"
		if [ ${key_value%=*} = "$prefix" -a ${key_value#*=} = "$suffix" ]
		then
			:
		else
			echo "${key_value} format is error"
			exit 3;
		fi
	fi
done < $file
}

#main menu

#check the operation file
if [ "$#" = 0 ]
then
	echo "Usage: keytool file"
	exit 1;
fi

operationfile=$1
check $operationfile

while true
do
	echo '
	Would you like to :
	1.Add an entry as key=value
	2.Update an entry as key=value
	3.Del an entry by key
	4.Query an entry by key
	5.Exit this progrom

	Please select one of above (1-5): '
	read choice
	case "$choice" in
		1)add $operationfile;;
		2)update $operationfile;;
		3)del $operationfile;;
		4)query $operationfile;;
		5)exit 0;;
		*)echo "Bad choice!"
	esac



done

那天自己写了个对key value进行操作的小脚本，执行试试

[blueskysee]

恩，大体已经有那个意思了