Re: Vfat increases file permissions

[Maciej Zenczykowski]

my fstab entry seems to work quite well:
/dev/hda1 /c vfat defaults,nosuid,nodev,quiet,umask=0000,showexec,noatime 0 0 # noexec

On Wed, 11 Feb 2004, Steve G wrote:

> Hello,
> 
> I am wondering about something. Why is it that when I mount a
> vfat floppy disk and copy a file to the disk, it becomes
> executable?
> 
> [root@linux fd_test]# umask 277
> [root@linux fd_test]# touch test.txt
> [root@linux fd_test]# ls -l test.txt
> -r--------    1 root     root            0 Feb 11 17:20 test.txt
> [root@linux fd_test]# cp test.txt /mnt/floppy/
> [root@linux fd_test]# ls -l /mnt/floppy/test.txt
> -rwxrwxrwx    1 root     root            0 Feb 11 17:20
> /mnt/floppy/test.txt
> 
> In the DOS world, not every file is executable. It uses the file
> extention to decide if the file is executable. A text file is not
> implicitly executable unless it has a .bat file extention.
> 
> Is the Linux implementation interpreting something that doesn't
> actually exist in the original?
> 
> I am concerned about world writeable, executable files existing
> on my floppies or USB devices that are formatted vfat. This seems
> like a security concern to me.
> 
> Thanks,
> Steve Grubb
> 
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