Linux 多行命令与 for

发布于 2025-01-11 07:16:42 字数 297 浏览 0 评论 0原文

我想测试和比较两个文件夹中的文件。为此，我使用了下一个命令

for FILE in folder_one/*; do
    test -f folder_one_arch/$FILE && echo $FILE " exists" || echo $FILE " not exists"
    cmp -s $FILE folder_one_arch/$FILE && echo "same" || echo "different";
done

，但该命令不起作用，问题出在哪里？

原文

I want to test and compare files in two folders. For this purpose, I used the next command

for FILE in folder_one/*; do
    test -f folder_one_arch/$FILE && echo $FILE " exists" || echo $FILE " not exists"
    cmp -s $FILE folder_one_arch/$FILE && echo "same" || echo "different";
done

but this command is not working, from where is the problem occuring?

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太阳公公是暖光 2025-01-18 07:16:42

问题来自 $FILE：它包含您期望文件时的路径。

我建议您采用以下方法：有两个变量，PATH（它是for循环中的变量）和FILE（它只是文件基名）。

for PATH in folder_one/*; do
    echo "PATH is $PATH "
    FILE=${PATH##*/}
    echo "FILE is now $FILE"
    test -f folder_one_arch/$FILE && echo $FILE " exists" || echo $FILE " not exists"
    cmp -s $PATH folder_one_arch/$FILE && echo "same" || echo "different";
done

请参阅https://mywiki.wooledge.org/BashFAQ/073

The problem comes from $FILE: it contains a path while you were expecting a file.

I propose you the following approach: have two variables, PATH which is the variable in the for loop and FILE which is only the file basename.

for PATH in folder_one/*; do
    echo "PATH is $PATH "
    FILE=${PATH##*/}
    echo "FILE is now $FILE"
    test -f folder_one_arch/$FILE && echo $FILE " exists" || echo $FILE " not exists"
    cmp -s $PATH folder_one_arch/$FILE && echo "same" || echo "different";
done

See https://mywiki.wooledge.org/BashFAQ/073

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