一个替换文本文件中某一个关键字附近的某一行的某一段的shell程序：

最新推荐文章于 2023-03-10 13:45:37 发布

原创最新推荐文章于 2023-03-10 13:45:37 发布 · 1.6k 阅读

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本文介绍如何编写一个Shell程序，该程序能够查找并替换文本文件中包含特定关键字的那一行内的特定内容。

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一个替换文本文件中某一个关键字附近的某一行的某一段的shell程序：

#!/bin/bash
file=$1
findpattern=$2
linegap=$3
replacepattern=$4
substitue=$5

help(){
  echo help:
  echo \$1:file\'s full path \(include filename\)
  echo \$2:the key string to be find
  echo \$3:the line count between the line where key string in and the line to be modified
  echo \$4:the string to be replace
  echo \$5:the string will take place the key string
}

echoinput(){
  echo \$1=$file
  echo \$2=$findpattern
  echo \$3=$linegap
  echo \$4=$replacepattern
  echo \$5=$substitue
}
if [ "$5" == "" ];then
  help;
  exit -1;
fi

echoinput;

if [ ! -f ${file} ];then
  echo $file is not exist.
fi

#echo "awk '/${findpattern}/{print NR}' ${file}";
n=`awk '/'"${findpattern}"'/{print NR}' ${file}`;
if [ "$n" == "" ];then
  echo can not find ${findpattern} in ${file};
  exit -1;
fi
echo find key string in line $n;
if [ ! -n $n ];then
  echo find too much lines.
  exit -1;
fi

n2=`expr $n + ${linegap}`;
echo will modify line $n2,line contnet is:;
awk 'NR=='${n2}'{print $0}' ${file};
#echo "sed ${n2}'s/${replacepattern}/${substitue}/g' ${file} > tmp${file};"
sed ${n2}'s/'"${replacepattern}"'/'"${substitue}"'/g' ${file} > tmp${file};
diff ${file} tmp${file}

还有些bug：只能在文本文件当前目录下运行。不修改了。