Question

How can i execute a certain command for every file/folder in the current folder?

I’ve started with this as a base script, but this seems that its only working when using temporary files, and i dont really like the ideea. Is there any other way?

FOLDER=".";
DIRS=`ls -1 "$FOLDER">/tmp/DIRS`;

echo >"/tmp/DIRS1";
while read line ; do
    SIZE=`du "$FOLDER$line"`;
    echo $SIZE>>"/tmp/DIRS1";
done < "/tmp/DIRS";

---

For anyone interested, i wanted to make a list of folders, sorted by their size. Here is the final result

FOLDER="$1";
for f in $FOLDER/*; do 
  du -sb "$f";
done | sort -n | sed "s#^[0-9]*##" | sed "s#^[^\./]*##" | xargs -L 1 du -sh | sed "s|$FOLDER||";

which leads to du -sb $FOLDER/* | sort -n | sed "s#^[0-9]*##" | sed "s#^[^\./]*##" | xargs -L 1 du -sh | sed "s|$FOLDER||";

Answer 1

Perhaps xargs, which reinvokes the command specified after it for each additional line of parameters received on stdin…

ls -1 $FOLDER | xargs du

But, in this case, why not…

du *

…? Or…

for X in *; do
    du $X
done

(Personally, I use zsh, where you can modify the glob pattern to only find say regular files, or only directories, only symlinks etc – I’m pretty sure there’s something similar in bash – can dig for details if you need that).

Am I missing part of your requirement?