On Thu, Jan 04, 2007 at 12:34:16PM +0100, Jens Nie wrote:
>
> I think i found a bug in the ext3 filesystem. It deals with
> dereferencing symlinks. I have installed a fresh openSUSE 10.2 on an
> ext3 filesystem.
> After that i wanted to include some selfmade LaTeX-classes by creating
> a symlink within /usr/share/texmf/tex/latex to the directory
> containing the class. texhash lists the new link within
> /usr/share/texmf/ls-R. However the complete content of the classes
> directory is missing. File and directory permissions are OK. I suspect
> that the dereferencing of symlinks to the target directory does not
> work on ext3. To check that i tested an older SuSE Installation with
> reiserfs, which works as expected. Another test i made was creating an
> ext3 fs, xfs and reiserfs on a loopback device. Within this test
> filesystem that i mounted temporarily to /mnt i created a symlink to
> /usr. Issuing the command ls -LRa, which is exactly what texhash is
> using and should dereference the link to /usr did not recursively list
> the contents of /usr on the ext3 filesystem whereas it did on the
> reiserfs and xfs.
It works for me. Using Ubuntu Edgy userspace with a 2.6.19-rc3
kernel on a T60p laptop:
- Ted
Script started on Thu 04 Jan 2007 12:36:43 PM EST
Top-level shell (parent script)
Using ssh-agent pid 6342
<tytso.root@candygram> {/home/tytso}
499# dd if=/dev/zero of=/var/tmp/test.img bs=1k count=30000
30000+0 records in
30000+0 records out
30720000 bytes (31 MB) copied, 1.28516 seconds, 23.9 MB/s
<tytso.root@candygram> {/home/tytso}
500# mke2fs -j /var/tmp/test.img
mke2fs 1.40-WIP (14-Nov-2006)
/var/tmp/test.img is not a block special device.
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
7520 inodes, 30000 blocks
1500 blocks (5.00%) reserved for the super user
First data block=1
Maximum filesystem blocks=30932992
4 block groups
8192 blocks per group, 8192 fragments per group
1880 inodes per group
Superblock backups stored on blocks:
8193, 24577
Writing inode tables: done
Creating journal (1400 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 34 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
<tytso.root@candygram> {/home/tytso}
501# mount -t ext3 -o loop /var/tmp/test.img /mnt
<tytso.root@candygram> {/home/tytso}
502# cd /mnt
<tytso.root@candygram> {/mnt}
503# ln -s /tmp foo
<tytso.root@candygram> {/mnt}
504# ls -l
total 12
0 lrwxrwxrwx 1 root root 4 2007-01-04 12:38 foo -> /tmp/
12 drwx------ 2 root root 12288 2007-01-04 12:37 lost+found/
<tytso.root@candygram> {/mnt}
505# ls -LRa /mnt
/mnt:
total 17
1 ./ 4 ../ 0 foo/ 12 lost+found/
/mnt/foo:
total 33624
0 ./ 8 IDB46835.DTF 4 play.pls
4 ../ 32 IDB66197.DTF 0 plugtmp/
6440 APC Flyer_embd.ppt 32 IDB77400.DTF 56 repair.pdf
26808 dumpe2fs.txt.bz2 32 IDB78728.DTF 20 Rt-Issues-1.ods
0 .esd-15806/ 32 IDB96845.DTF 0 ssh-CWzKqE6724/
0 .exchange-tytso/ 0 keyring-hoWMU3/ 0 ssh-PtOxzg6309/
0 gconfd-tytso/ 0 mapping-tytso= 0 ssh-TnSaM10059/
0 .gdm_socket= 0 notesFCB315/ 0 ssh-Zjhueb6724/
0 .ICE-unix/ 0 orbit-tytso/ 0 ssh-ZueXS10264/
32 IDB07883.DTF 4 play-1.pls 0 virtual-tytso.m02ZFH/
32 IDB09374.DTF 4 play-2.pls 0 .wine-15806/
32 IDB34926.DTF 4 play-3.pls 4 .X0-lock
40 IDB44293.DTF 4 play-4.pls 0 .X11-unix/
/mnt/foo/.esd-15806:
total 0
0 ./ 0 ../ 0 socket=
/mnt/foo/.exchange-tytso:
total 0
0 ./ 0 ../
/mnt/foo/gconfd-tytso:
total 0
0 ./ 0 ../ 0 lock/
/mnt/foo/gconfd-tytso/lock:
total 4
0 ./ 0 ../ 4 ior*
/mnt/foo/.ICE-unix:
total 0
0 ./ 0 ../ 0 6724=
/mnt/foo/keyring-hoWMU3:
total 0
0 ./ 0 ../ 0 socket=
/mnt/foo/notesFCB315:
total 512
0 ./ 0 ../ 504 ~editclp.ncf 4 ~notetmp.reg 4 ~notetp2.reg
/mnt/foo/orbit-tytso:
total 4
0 ./ 0 linc-1b16-0-7215ae8e714e5=
0 ../ 0 linc-1b38-0-164e0af7b7ab1=
0 bonobo-activation-register.lock* 0 linc-1b7a-0-23ef1182722fa=
4 bonobo-activation-server-ior 0 linc-1bad-0-510bba9c63bb6=
0 linc-1a44-0-466fcbd5aa1f0= 0 linc-1bff-0-5f07b0c6e3793=
0 linc-1a92-0-4e186b54931f9= 0 linc-1c05-0-3427276e3f87c=
0 linc-1aa5-0-1f23e56b70d97= 0 linc-34e6-0-5853523bb2721=
0 linc-1acc-0-7fbb2ca661716= 0 linc-4269-0-3a34f2c58b987=
0 linc-1ad1-0-5db9c951c0cc9= 0 linc-5492-0-d435cecb77c5=
0 linc-1ad4-0-1aac39888363d= 0 linc-57fc-0-33e090d41719a=
0 linc-1ae6-0-7a50f3e07932f= 0 linc-f1f-0-68984f4a27444=
0 linc-1ae8-0-684e70a345d5= 0 linc-f2d-0-68984f4a73a2d=
0 linc-1aea-0-7a50f3e0d46f4= 0 linc-f2f-0-68984f4a8a1f7=
0 linc-1af4-0-73566ae82dc75= 0 linc-f31-0-68984f4a91497=
0 linc-1b0d-0-44885fa524551= 0 linc-f40-0-1f1d2cf4f67e=
0 linc-1b12-0-7215ae8126f2e=
/mnt/foo/plugtmp:
total 0
0 ./ 0 ../
/mnt/foo/ssh-CWzKqE6724:
total 0
0 ./ 0 ../ 0 agent.6724=
/mnt/foo/ssh-PtOxzg6309:
total 0
0 ./ 0 ../ 0 agent.6309=
/mnt/foo/ssh-TnSaM10059:
total 0
0 ./ 0 ../ 0 agent.10059=
/mnt/foo/ssh-Zjhueb6724:
total 0
0 ./ 0 ../ 0 agent.6724=
/mnt/foo/ssh-ZueXS10264:
total 0
0 ./ 0 ../ 0 agent.10264=
/mnt/foo/virtual-tytso.m02ZFH:
total 0
0 ./ 0 ../
/mnt/foo/.wine-15806:
total 0
0 ./ 0 ../ 0 cxoffice-wine.lock 0 server-802-71e6d9/
/mnt/foo/.wine-15806/server-802-71e6d9:
total 0
0 ./ 0 ../ 0 lock 0 socket= 0 vwin32.vxd
/mnt/foo/.X11-unix:
total 0
0 ./ 0 ../ 0 X0=
/mnt/lost+found:
total 13
12 ./ 1 ../
<tytso.root@candygram> {/mnt}
506#
Script done on Thu 04 Jan 2007 12:38:32 PM EST
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