I am trying to find total size of a current directory and the shell script is failing at expr command. below is my code:
#!/bin/sh
echo "This program summarizes the space size of current directory"
sum=0
for filename in *.sh
do
fsize=`du -b $filename`
echo "file name is: $filename Size is:$fsize"
sum=`expr $sum + $fsize`
done
echo "Total space of the directory is $sum"
Try du -b somefile. It will print size and name like this:
263 test.sh
Then you are trying to add both size and name arithmetically to sum which will never work.
You need to either slice away the file name or, better, use stat instead of du:
fsize=`stat -c "%s" $filename`
...and for bash there is a bit cleaner way to do the math which is described here:
sum=$(($sum + $fsize))
output:
This program summarizes the space size of current directory
file name is: t.sh Size is:270
Total space of the directory is 270
du returns the size and filename, you just want the total size. Try changing your fsize assignment
fsize=$(du -b $filename | awk '{print $1}')
Total size of directory contents, excluding subdirectories and the directory itself:
find . -maxdepth 1 -type f | xargs du -bS | awk '{s+=$1} END {print s}'
du will give actual space used by a directory, so I had to use "find" to really only match files, and awk to add the sizes.
