逐行读取一个文件行的值赋给变量 [英] Read a file line by line assigning the value to a variable

问题描述

我有以下的.txt文件：

I have the following .txt file:

Marco
Paolo
Antonio

我要读它行由行，每行我要分配一个.txt线值的变量。假设我的变量 $名称，该流程是：

• 阅读第一行从文件


• 分配 $名称 =马可


• 请与 $名称
某些任务

• 从文件中读取第二行


• 分配 $名称 =保罗

• Read first line from file
• Assign $name = "Marco"
• Do some tasks with $name
• Read second line from file
• Assign $name = "Paolo"

推荐答案

以下（另存为 rr.sh ）读取由线参数传入行的文件：

The following (save as rr.sh) reads a file passed as an argument line by line:

#!/bin/bash
while IFS='' read -r line || [[ -n "$line" ]]; do
    echo "Text read from file: $line"
done < "$1"

说明：

• IFS =''（或 IFS = ）prevents领导/被修剪尾随空白。


• -r prevents反斜线被间preTED逃脱。


• || [[-n $行] $ P $的，如果它不以 \\ n （结束以来被忽略pvents最后一行读返回时遇到EOF）非零退出code。

• IFS='' (or IFS=) prevents leading/trailing whitespace from being trimmed.
• -r prevents backslash escapes from being interpreted.
• || [[ -n $line ]] prevents the last line from being ignored if it doesn't end with a \n (since read returns a non-zero exit code when it encounters EOF).

运行脚本如下：

chmod +x rr.sh
./rr.sh filename.txt

...

这篇关于逐行读取一个文件行的值赋给变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！