Re: cp(1) from ntfs fails

[Nicolas Joly <njoly%pasteur.fr@localhost>]

On Thu, Apr 24, 2008 at 11:35:08PM +0200, Jukka Salmi wrote:
> Jukka Salmi --> current-users (2008-04-24 20:25:43 +0200):
> > Hello,
> > 
> > trying to copy files from a ntfs (win xp) file system using cp(1) on
> > a 4.99.60 i386 system currently fails (IIRC this used to work):
> > 
> > $ mount
> > [...]
> > /dev/wd0n on /mnt/win type ntfs (read-only, local)
> > 
> > $ ls -l /mnt/win/BOOT.INI
> > -rwxr-xr-x  1 root  wheel  194 Sep 18  2006 /mnt/win/BOOT.INI
> > 
> > $ cp /mnt/win/BOOT.INI .
> > cp: ./BOOT.INI: Invalid argument
[...]
> BTW, copying files larger than 8 MB seems to work fine; cp(1) doesn't
> use mmap(2) in this case. Furthermore, reading files also works fine,
> so I can use e.g. tar(1) as a workaround to copy files.
> 
> And, cmp(1) even dumps core if one of the files to be compared is on
> the ntfs:
> 
> $ cmp /bin/ls /mnt/win/BOOT.INI
> Segmentation fault (core dumped)
[...]
> Seems to be somehow mmap(2) related... Anybody able to reproduce this?

Likewise here on a -current amd64 machine ...

njoly@petaure [~]> uname -a
NetBSD petaure.lan 4.99.60 NetBSD 4.99.60 (PETAURE) #111: Thu Apr 24 01:01:23 
CEST 2008  
njoly%petaure.lan@localhost:/local/src/NetBSD/obj.amd64/sys/arch/amd64/compile/PETAURE
 amd64
njoly@petaure [~]> mount | grep ntfs
/dev/wd0e on /mount/windows/C type ntfs (read-only, local)
njoly@petaure [~]> ls -l /mount/windows/C/boot.ini 
-rwxr-xr-x  0 root  wheel  212 Feb 28 12:57 /mount/windows/C/boot.ini
njoly@petaure [~]> cp /mount/windows/C/boot.ini .
cp: ./boot.ini: Invalid argument

njoly@petaure [~]> cmp /bin/ls /mount/windows/C/boot.ini 
zsh: segmentation fault (core dumped)  cmp /bin/ls /mount/windows/C/boot.ini
njoly@petaure [~]> gdb cmp cmp.core 
GNU gdb 6.5
[...]
Core was generated by `cmp'.
Program terminated with signal 11, Segmentation fault.
#0  0x000000000040145c in c_regular (fd1=3, file1=0x7f7ffffff9bc "/bin/ls", 
    skip1=0, len1=<value optimized out>, fd2=5, 
    file2=0x7f7ffffff9c4 "/mount/windows/C/boot.ini", skip2=0, len2=212)
    at /local/src/NetBSD/src/usr.bin/cmp/regular.c:92
92                              if ((ch = *p1) != *p2) {
(gdb) bt
#0  0x000000000040145c in c_regular (fd1=3, file1=0x7f7ffffff9bc "/bin/ls", 
    skip1=0, len1=<value optimized out>, fd2=5, 
    file2=0x7f7ffffff9c4 "/mount/windows/C/boot.ini", skip2=0, len2=212)
    at /local/src/NetBSD/src/usr.bin/cmp/regular.c:92
#1  0x0000000000401169 in main (argc=<value optimized out>, 
    argv=<value optimized out>) at /local/src/NetBSD/src/usr.bin/cmp/cmp.c:152

-- 
Nicolas Joly

Biological Software and Databanks.
Institut Pasteur, Paris.