使用两个不同的脚本从FIFO进行写入和读取 [英] Write and read from a fifo from two different script

问题描述

我有两个bash脚本. 一个脚本用fifo编写.第二个从fifo读取，但是在第一个结束后写入.

I have two bash script. One script write in a fifo. The second one read from the fifo, but AFTER the first one end to write.

但是有些东西行不通.我不明白问题出在哪里.这里是代码.

But something does not work. I do not understand where the problem is. Here the code.

第一个脚本是(作者):

The first script is (the writer):

#!/bin/bash

fifo_name="myfifo";

# Se non esiste, crea la fifo;
[ -p $fifo_name ] || mkfifo $fifo_name;

exec 3<> $fifo_name;

echo "foo" > $fifo_name;
echo "bar" > $fifo_name;

第二个脚本是(读者):

The second script is (the reader):

#!/bin/bash

fifo_name="myfifo";

while true
do
    if read line <$fifo_name; then
       # if [[ "$line" == 'ar' ]]; then
        #    break
        #fi
        echo $line
    fi
done

有人可以帮我吗? 谢谢

Can anyone help me please? Thank you

推荐答案

将第二个脚本替换为:

#!/bin/bash    
fifo_name="myfifo"
while true
do
    if read line; then
        echo $line
    fi
done <"$fifo_name"

这只会打开fifo一次，并从中读取每一行.

This opens the fifo only once and reads every line from it.

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