Munpack – File size limit exceeded

We alreay know how to extract files from Plesk backup with mpack, but if you do receive “File size limit exceeded” error, it can be from the following reasons:

• Your file system doesn’t have LFS (large file support) support
• OS limits (limits on the system resources imposed by your administrator)
• mpack is not compiled with LFS

Check that your filesystem supports files bigger than 2GB (create a test file with “dd” command).

[vitalie@silver ~]$ dd if=/dev/zero of=test.bin bs=1G count=3 # create 3GB file

Then check your file size limits with ulimit command:

[vitalie@silver ~]$ ulimit -a | grep '^file size'
file size               (blocks, -f) unlimited

You can adjust limits from /etc/security/limits.conf, read file comments on how to do it, or read this article:
http://www.cyberciti.biz/faq/file-size-limit-exceeded-error-under-linux-and-solution/

If none above limits you, then the problems comes from mpack, it doesn’t have suport for large files (>2GB).

The guys from the Plesk recommends to grep the backup file, to find begin and end of the file in archive:
http://kb.parallels.com/en/1757

This solutions is not appropriate for large backup files, we’ll just recompile mpack to support large files.

Grab mpack’s RPM source from the Dag’s repository
http://dag.wieers.com/rpm/packages/mpack/mpack-1.6-2.rf.src.rpm

install it:

[vitalie@silver ~]$ rpm -ivh mpack-1.6-2.rf.src.rpm
[...]

Then modify mpack.spec and add the following code after “%build”:

export CFLAGS="-D_FILE_OFFSET_BITS=64"

Then rebuild the package and install it:

[vitalie@silver ~] rpm -ba mpack.spec
[...]
[vitalie@silver ~] rpm -Uvh --force mpack-1.6-3.rf.i386.rpm
[...]

References:

• Linux PAM
• jperalta.wordpress.com
• www.cyberciti.biz