bash Shell脚本：检查文件是文件而不是目录
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Shell script: Check that file is file and not directory
提问by Industrial
I'm currently working on a small cute shell script to loop through a specific folder and only output the files inside it, excluding any eventual directories. Unfortunately I can't use findas I need to access the filename variables.
我目前正在编写一个小巧可爱的 shell 脚本来循环遍历特定文件夹并只输出其中的文件，不包括任何最终目录。不幸的是，我无法使用，find因为我需要访问文件名变量。
Here's my current snippet, which doesn't work:
这是我当前的片段，它不起作用：
for filename in "/var/myfolder/*"
do
if [ -f "$filename" ]; then
echo $filename # Is file!
fi
done;
What am I doing wrong?
我究竟做错了什么？
回答by SirDarius
You must not escape /var/myfolder/*, meaning, you must remove the double-quotes in order for the expression to be correctly expanded by the shell into the desired list of file names.
您不能转义 /var/myfolder/*，这意味着您必须删除双引号，以便 shell 将表达式正确扩展为所需的文件名列表。
回答by Fred Foo
What you're doing wrong is not using find. The filename can be retrieved by using {}.
你做错的是没有使用find. 可以使用 检索文件名{}。
find /var/myfolder -maxdepth 1 -type f -exec echo {} \;
回答by sarnold
for filename in "/var/myfolder/*"
for filename in "/var/myfolder/*"
The quotes mean you get one giant string from that glob -- stick an echo _ $filename _immediately before the ifto discover that it only goes through the 'loop' once, with something that isn't useful.
引号意味着你从那个 glob 中得到一个巨大的字符串——echo _ $filename _在 之前贴上一个if，发现它只通过“循环”一次，有些东西没有用。
Remove the quotes and try again :)
删除引号并重试:)
回答by vmpstr
Try without double quotes around /var/myfolder/* (reason being is that by putting double quotes you are making all the files a single string instead of each filename a separate string
尝试在 /var/myfolder/* 周围不使用双引号（原因是通过放置双引号，您将所有文件变成一个字符串，而不是每个文件名变成一个单独的字符串
回答by Noufal Ibrahim
You can use find and avoid all these hassles.
您可以使用 find 并避免所有这些麻烦。
for i in $(find /var/myfolder -type f)
do
echo $(basename $i)
done
Isn't this what you're trying to do with your situation? If you want to restrict depth, use the -maxdepthoption to find.
这不是你试图对你的情况做的事情吗？如果要限制深度，请使用-maxdepth查找选项。
