bash 遍历目录和子目录以列出文件的脚本
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script to traverse through directories and subdirectories to list files
提问by Komal Rathi
#!/bin/bash
#script to loop through directories to merge files
mydir=/data/
files="/data/*"
for f in $files
do
if[ -d "$f" ]
then
for ff in $f/*
do
echo "Processing $ff"
done
else
echo "Processing $f"
fi
done
I have the above code to go through directories and sub-directories and list all the files. I am getting the error: syntax error near unexpected token `then'
我有上面的代码来遍历目录和子目录并列出所有文件。我收到错误：语法错误接近意外标记`then'
What am I doing wrong here?
我在这里做错了什么？
回答by John Kugelman
if [ -d "$f" ]
^
There needs to be a space between ifand [. If you don't have a space, bash thinks you're trying to execute a command named if[.
if和之间需要有一个空格[。如果您没有空格，bash 会认为您正在尝试执行名为if[.
files="/data/*"
for f in $files
Also know that this won't work. To store a wildcard expansion in a variable like that you need to use an array. The syntax is a bit hairier...
也知道这行不通。要将通配符扩展存储在这样的变量中，您需要使用数组。语法有点毛茸茸的......
files=(/data/*)
for f in "${files[@]}"
Or you could write the wildcard inline the way you do with the inner loop. That would work fine.
或者您可以像处理内部循环一样内联编写通配符。那会工作得很好。
for f in "$mydir"/*
For what it's worth, you could use findto recurse through all files and sub-directories recursively.
对于它的价值，您可以使用find递归遍历所有文件和子目录。
find /data/ -type f -print0 | while read -d $'# find all files either in /data or /data/subdir
find /data -type f -maxdepth 2 | while read file; do
echo $file;
end
' file; do
echo "Processing $file"
done
-type fmatches files only. -print0combined with -d $'\0'is a way to be extra careful with file names containing characters like spaces, tabs, and even newlines. It is legal to have these characters in file names so I like to write my scripts in a way that can handle them.
-type f仅匹配文件。-print0结合使用-d $'\0'是一种对包含空格、制表符甚至换行符等字符的文件名格外小心的方法。在文件名中包含这些字符是合法的，所以我喜欢以一种可以处理它们的方式编写我的脚本。
Note that this will recurse deeper than just sub-directories. It'll go all the way down. If that's not what you want, add -maxdepth 2.
请注意，这将比子目录更深入地递归。它会一直下降。如果这不是您想要的，请添加-maxdepth 2.
回答by John Ledbetter
As an alternative, you could probably replace this entire loop with something like
作为替代方案，您可能可以用类似的东西替换整个循环
# --- -------------------------------- --- #
# FUNC: Process a folder of files
# --- -------------------------------- --- #
func_process_folder_set(){
FOLDER=""
while read -rd $'##代码##' file; do
fileext=${file##*.} # -- get the .ext of file
case ${fileext,,} # -- make ext lowercase for checking in case statement
echo "FILE: $file" # -- print the file (always use " " to handle file spaces)
done < <(find ${FOLDER} -type f -maxdepth 20 -name '*.*' -print0)
}
# -- call the function above with this:
func_process_folder_set "/some/folder"
回答by Mike Q
Here's a function that does what you ask, you pass it a folder see the call at the bottom func_process_folder_set "/folder".
这是一个执行您要求的功能，您将其传递给一个文件夹，请参阅底部 func_process_folder_set "/folder" 的调用。
##代码##