Re: (no subject)

["Pádraig Brady" <P@draigBrady.com>]

Jeromy Keloway wrote:
> Good afternoon
> 
> What I have to say is a little bit... hard to believe.
> But I think I found a "bug" in the Shell-Command "cp". The command goes into a endless loop when I do the following:
> 
> 
> 1) Mount a partition with the filesystem "ext3" ("/media/EXT3drive")
> 
> 2) Mount a partition with the filesystem "fat32" ("/media/FAT32drive")
> 
> 3) Generate a file on the ext3-System with a filesize > 4GB
> 
> 4) Try to copy this file from /media/EXT3drive to /media/FAT32drive with the following command: "cp -urv /media/EXT3drive/4GBfile.img /media/FAT32drive/4GBfile.img"
> 
> 5) The file will be transfered until the filesize reached the 4GB limit. When the file has the maximum size that is possible on FAT32, it stop growing and cp is waiting forever to complet this file(wait about 48h -> nothing happens).
> 
> 
> What cp should do:
> 
> Check the filesystem on the target partition before the transfer begins and inform the user about any problems OR interrupt the transfer of this file and write a log/inform the user.
> 
> Thanks for your attention
> 
> Jeromy

Seems fine here:

$ truncate -s5GB /media/disk/5GBfile.img
truncate: truncating `/media/disk/5GBfile.img' at 5000000000 bytes: File too large
$ ls -l /media/disk/5GBfile.img
-rwxr-xr-x 1 padraig root 0 2009-02-04 11:01 /media/disk/5GBfile.img
$ rm /media/disk/5GBfile.img

$ truncate -s5GB 5GBfile.img
$ cp -urv 5GBfile.img /media/disk/
`5GBfile.img' -> `/media/disk/5GBfile.img'
cp: cannot lseek `/media/disk/5GBfile.img': Invalid argument
$ rm /media/disk/5GBfile.img

$ cp --sparse=never -urv 5GBfile.img /media/disk/
`5GBfile.img' -> `/media/disk/5GBfile.img'
./cp: writing `/media/disk/5GBfile.img': File too large
$ ls -l /media/disk/5GBfile.img
-rwxr-xr-x 1 padraig root 4,294,967,295 2009-02-04 11:14 /media/disk/5GBfile.img

What version of kernel and coreutils do you have?
I would guess that the FAT driver in your kernel may be having issues?

cheers,
Pádraig.