Folder size as variable-CodePudding

I'm trying to compare a folder size with a size limit. When I try to run the script, it gives me the error 'integer expression expected'.

limit=200
foldersize=$(du /home/user1/testfolder)

if [ "$foldersize" -le "limit" ];
then
  echo "Folder size is small"
else
  echo "Folder size is big"
fi

CodePudding user response：

The size needs to be read from the du < <(command) stream, with tab and new-line as fields separator and no records delimiter, because the output from dc contains multiple lines to be read as a single record.

Here is an example of output from du --bytes --summarize --total /home/user1/testfolder:

4954626   /home/user1/testfolder
4954626   total

Your code modified:

#!/usr/bin/env bash

declare -i limit=200000
declare -- test_folder=/home/user1/testfolder

declare -i folder_size
IFS=$' \t\n' read -r -d ''  _ _ folder_size _ < <(
  du --bytes --summarize --total "$test_folder"
)

if [[ "$folder_size" -le "$limit" ]];
then
  printf 'Folder size is small\n'
else
  printf 'Folder size is big\n'
fi

CodePudding user response：

Perhaps something like this:

limit=200
folder_size=$(du ~user1/testfolder|cut -d ' ' -f 1)

if (( folder_size <= limit ))
then
  echo Folder size is small
else
  echo Folder size is big
fi

or, without variables,

if (( $(du ~user1/testfolder|cut -d ' ' -f 1) <= 200 ))
then
  ...
else
  ...
fi

CodePudding user response：

do this:

du -s /home/user1/testfolder |cut -f1

instead of :

du /home/user1/testfolder