如何使一个bash功能，可从标准输入读取？ [英] How to make a bash function which can read from standard input?

问题描述

我有一些脚本，带参数工作，他们的工作只是罚款，但我想他们能够从标准输入读取，例如一个管道，一个例子，假设这就是所谓的读：

I have some scripts that work with parameters, they work just fine but i would like them to be able to read from stdin, from a pipe for example, an example, suppose this is called read:

#!/bin/bash
function read()
{
 echo $*
}

read $*

现在这一点也适用读富，酒吧，但我想用它作为：

Now this works with read "foo" "bar", but I would like to use it as:

echo "foo" | read

我如何做到这一点？

How do I accomplish this?

推荐答案

您可以使用＆LT;＆LT;＆LT; 来获得这一行为。 阅读＆LT;＆LT;＆LT;回声文本应该做到这一点。

You can use <<< to get this behaviour. read <<< echo "text" should make it.

与测试 readly （I preFER不使用保留字）：

Test with readly (I prefer not using reserved words):

function readly()
{
 echo $*
 echo "this was a test"
}

$ readly <<< echo "hello"
hello
this was a test

通过管道的基础上，这个答案为Bash脚本，从标准输入读取管道值：

$ echo "hello bye" | { read a; echo $a;  echo "this was a test"; }
hello bye
this was a test

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