Get total files size from a file containing a file list

Question

I have a file containing a list of files that I would like to know the total files size. Is there a command to do so?

My OS is a very basic linux (Qnap TS-410).

EDIT:

A few lines from the file:

/share/archive/Bailey Test/BD006/0.tga
/share/archive/Bailey/BD007/1 version 1.tga
/share/archive/Bailey 2/BD007/example.tga

Answer 1

I believe something like this would work in busybox:

du `cat filelist.txt` | awk '{i+=$1} END {print i}'

I don't have the same environment as you, but if you encounter issues with spaces in filenames something like this would work too:

cat filelist.txt | while read file;do
  du "$file"
done | awk '{i+=$1} END {print i}'

Edit 1:
@stew is right in his post below, du shows the disk usage and not the exact filesize. To change the behavior busybox uses the -a flag, so try: du -a "$file" for exact filesize and compare the output/behavior.

Answer 2

while read filename ;  do stat -c '%s' $filename ; done < filelist.txt | awk '{total+=$1} END {print total}'

This is similar to Mattias Ahnberg's solution. Using "read" gets around problems with filenames/directories with spaces. I use stat instead of du to get the filesize. du is getting the amount of room it is using on disk instead of the filesize, which might be different. Depending on your filesystem, a 1 byte file will still occupy 4k on disk (or whatever the blocksize is). So for a 1 byte file, stat says 1 byte and du says 4k.

Answer 3

Try something like this:

$ cat filelist.txt | xargs ls -l | awk '{x+=$5} END {print "total bytes: " x}' 

To deal properly with spaces in paths:

$ find /path/to/files -type f -print0 | xargs -0 ls -l | awk '{x+=$5} END {print "total bytes: " x}' 

Answer 4

I don't know if your linux tools are capable of this, but:

cat /tmp/filelist.txt  |xargs -d \\n du -c

Do, the xargs will set the delimiter to be a newline character, and du will produce a grand total for you.

Looking at http://busybox.net/downloads/BusyBox.html it seems that "busybox du" will support the grand total option, but the "busybox xargs" will not support custom delimiters.

Again, I'm not sure of your toolset.