Shell Programming and Scripting

I want count size of all directories on my current File System including size of links only if the target of these links is on same filesystem.

I tried below but it gives size of link target even if its on a different FS:

Code:

du -skL *

also the -x option did not help.
Any help.

You may have to do this the slow way. So.. you could do your original command and the a second command finding the links only (e.g. using find) that go off filesystem and subtracting that out (find might not do it though).

You may be able to do it one pass using find and/or looping, but it will be slow.

When you say "all" directories, do you want to descend the top level directories from your current position and report them too? If so, leave off the -s flag. It may be useful to pipe this into a sort as below:-

Code:

du -kx | sort -n

You can choose if you want to include the -L flag. I think that links to files will just count the link where links to a directory will count the content of the directory. Of course, you are not considering hard links within your filesystem, however in my testing, I have found that if I have:-

Code:

robin @ /tmp/robin>ls -l
total 8
drwxr-xr-x 2 robin robingrp 4096 Jan 29 10:18 1
drwxr-xr-x 2 robin robingrp 4096 Jan 29 10:19 2
lrwxrwxrwx 1 robin robingrp    1 Jan 29 10:19 3 -> 2
robin @ /tmp/robin>ls -li 1 2
1:
total 183340
528470 -rw-r--r-- 2 robin robingrp 187740160 Jan 29 10:18 bigfile

2:
total 183340
528470 -rw-r--r-- 2 robin robingrp 187740160 Jan 29 10:18 bigfile
robin @ /tmp/robin>

..... you can see that directories 1 & 2 contain the same file hard linked (same inode number) and directory 3 is symbolically linked.

I then get this output:-

Code:

robin @ /tmp/robin>du -k
183344  ./2
4       ./1
183352  .
robin @ /tmp/robin>

..... so the file is only reported once. i must admit I don't know why it is reported under directory 2 rather than 1, but it's something to be aware of.
You can also see that 3 doesn't list at all.

This is on RHEL6, but other operating systems may vary. It might be that it reports the space used under 1 as the same as 2, but the total doesn't match up.

I hope that this helps.


Robin