linux - 如果特定字符串在 bash 中使用 sed 在模式之间匹配，则在前后添加字符串

Question

问题:要在前后添加一个字符串，如果指定的字符串在 bash 中使用 sed 的模式之间匹配？ ??

在下面的代码中，我想在 object Host "kali"{ 上方添加/* 一行，并将 */添加到 } 出现后的下一行(不是最后一次出现 })。

这是我的代码

object Host "linux" {
import "windows"
address = "linux"
groups = ["linux"]
}


object Host "kali" {
import "linux"
address = "linux"
groups = [linux ]
}


object Host "windows" {
import "linux"
address = "linux"
groups = ["windows" ]
}

这是预期的输出:

object Host "linux" {
import "windows"
address = "linux"
groups = ["linux"]
}

/*
object Host "kali" {
import "linux"
address = "linux"
groups = [linux ]
}
*/

object Host "windows" {
import "linux"
address = "linux"
groups = ["windows" ]
}

**This is what I tried**


#! /bin/bash
NONE='\033[00m'
RED='\033[01;31m'
GREEN='\033[0;32m'
clear
echo -e  "Enter the names to comment in config file"
cat > comment-file.txt
clear
echo -e "#################################################################################"
echo "Please wait. The names will be commented shortly............"
echo -e "#################################################################################"
echo "Dont press any button, Please hold on...."
while read -r names
do
loc=$(grep -il "object.*Host.*\"$names.*\"" /home/jo/folders/test-sc/*.txt)
if [ -z $loc ]
then
        echo -e " $names$RED No Object definition found $NONE "
else
sed -i '/object Host \"$names.*\" {/ { s,^,/*\n,
    : loop
    /}/ {
        s,$,\n*/,
        p
        d
    }
    N
    b loop
}' "$loc"

  echo -e " $names - $loc -   $GREEN Object host defenition commented $NONE "
fi
done < comment-file.txt
echo -e "#################################################################################"
echo -e "\t\t\t\t Script completed \t\t\t\t"
echo -e "#################################################################################"

rm -rf comment-file.txt

错误:

输出文件中未进行任何更改，这意味着/home/jo/folders/test-sc/*.txt

Answer 1

这可能对你有用(GNU sed):

sed -e '/object Host "kali"/{i\/*' -e ':a;n;/}/!ba;a\*/' -e '}' file

查找包含 object Host "kali" 的行，在包含 /* 的行之前插入一行，读取/打印更多行，直到包含 } 的行，并附加行 */。