ln -s broken on 2.4.5

ln -s broken on 2.4.5

[Edsel Adap]

Hi,

I downloaded the linux 2.4.5 sources and built and installed them on my
system.  Since then, I've noticed strange file system behavior:

marvin:~> cd /tmp
marvin:/tmp> ls -la
total 2656
drwxrwxrwt    6 root     root         1024 May 30 12:06 ./
drwxr-xr-x   22 root     root         1024 Feb 18  2000 ../
-r--r--r--    1 root     root           11 May 30 11:19 .X0-lock
drwxrwxrwt    2 root     root         1024 May 30 11:19 .X11-unix/
drwxrwxrwt    2 root     root         1024 May 30 11:18 .font-unix/
-rw-r--r--    1 adap     users     2699286 May 30 11:24 mpeg2-digital.mpg
drwx------    2 adap     root         1024 May 30 12:06 ssh-SXp13149/
drwx------    2 adap     root         1024 May 30 11:19 ssh-unNLs321/
marvin:/tmp> ln -s foo bar
marvin:/tmp> ls -la
total 2656
drwxrwxrwt    6 root     root         1024 May 30 12:06 ./
drwxr-xr-x   22 root     root         1024 Feb 18  2000 ../
-r--r--r--    1 root     root           11 May 30 11:19 .X0-lock
drwxrwxrwt    2 root     root         1024 May 30 11:19 .X11-unix/
drwxrwxrwt    2 root     root         1024 May 30 11:18 .font-unix/
lrwxrwxrwx    1 adap     users           3 May 30 12:09 bar -> bar
-rw-r--r--    1 adap     users     2699286 May 30 11:24 mpeg2-digital.mpg
drwx------    2 adap     root         1024 May 30 12:06 ssh-SXp13149/
drwx------    2 adap     root         1024 May 30 11:19 ssh-unNLs321/
marvin:/tmp>

Notice that the symlink created is wrong.  It seems that any symlink I
create is always linked to itself.

I booted 2.4.0 again, and the problem went away.  Is this a known
problem? Is there a patch?

Please cc me with your replies since I am not on the list.

-- 
Edsel Adap
edsel@adap.org
http://www.adap.org/~edsel/          LINUX - the choice of the GNU generation

"Netscape is an application which grows to fill all available memory."  - me

Re: ln -s broken on 2.4.5

[Rasmus B. Hansen]

On Wed, 30 May 2001, Edsel Adap wrote:

> I downloaded the linux 2.4.5 sources and built and installed them on my
> system.  Since then, I've noticed strange file system behavior:

> marvin:/tmp> ln -s foo bar

> lrwxrwxrwx    1 adap     users           3 May 30 12:09 bar -> bar

> Notice that the symlink created is wrong.  It seems that any symlink I
> create is always linked to itself.

I tried the same:

moffe@grignard:/tmp/test# ls -la
totalt 1
drwxr-xr-x    2 moffe    users          48 ons maj 30 19:10:20 2001 .
drwxrwxrwt   13 root     root          496 ons maj 30 19:10:40 2001 ..
moffe@grignard:/tmp/test# ln -s foo bar
moffe@grignard:/tmp/test# ls -la
totalt 1
drwxr-xr-x    2 moffe    users          72 ons maj 30 19:10:58 2001 .
drwxrwxrwt   13 root     root          496 ons maj 30 19:10:40 2001 ..
lrwxrwxrwx    1 moffe    users           3 ons maj 30 19:10:58 2001 bar -> foo
moffe@grignard:/tmp/test# cd /boot/test/
moffe@grignard:/boot/test# ls -la
totalt 2
drwxr-xr-x    2 moffe    users        1024 ons maj 30 19:10:28 2001 .
drwxr-xr-x    4 root     root         1024 ons maj 30 19:10:28 2001 ..
moffe@grignard:/boot/test# ln -s foo bar
moffe@grignard:/boot/test# ls -la
totalt 2
drwxr-xr-x    2 moffe    users        1024 ons maj 30 19:11:09 2001 .
drwxr-xr-x    4 root     root         1024 ons maj 30 19:10:28 2001 ..
lrwxrwxrwx    1 moffe    users           3 ons maj 30 19:11:09 2001 bar -> foo

/ is on reiserfs and /boot is on ext2 - as you see, I do not have the
problem (also running 2.4.5).

Could it be a fileutils problem?

Rasmus

-- 
-- [ Rasmus 'Møffe' Bøg Hansen ] --------------------------------------
Programming is a race between programmers, who try and make more and
more idiot-proof software, and universe, which produces more and more
remarkable idiots.
Until now, universe leads the race.
                                                           - R. Cooka
-------------------------------- [ moffe at amagerkollegiet dot dk ] --

Re: ln -s broken on 2.4.5

[Alan Cox]

> I downloaded the linux 2.4.5 sources and built and installed them on my
> system.  Since then, I've noticed strange file system behavior:

What file system. Its find on my 2.4.5-ac with ext2

Re: ln -s broken on 2.4.5

[Marcus Meissner]

In article <E155Ady-0006MX-00@the-village.bc.nu> you wrote:
>> I downloaded the linux 2.4.5 sources and built and installed them on my
>> system.  Since then, I've noticed strange file system behavior:

> What file system. Its find on my 2.4.5-ac with ext2

100% reproducible on NFS and EXT2 here, with following:

$ ln -s fupp/bar bar
$ ls -la bar
lrwxrwxrwx   1 marcus   users           3 May 30 20:30 bar -> bar
$ 

Ciao, Marcus

Re: ln -s broken on 2.4.5

[Edsel Adap]

On Wed, May 30, 2001 at 07:24:30PM +0100, Alan Cox wrote:
> > I downloaded the linux 2.4.5 sources and built and installed them on my
> > system.  Since then, I've noticed strange file system behavior:
> 
> What file system. Its find on my 2.4.5-ac with ext2

Filesystem: ext2
Architecture: i386
CPU: AMD K6-II

Christopher Cole mentioned that he saw this problem, but it went away
after a reboot.  I rebooted into 2.4.5 again and the problem seemed to
have gone away.

But now, I got something else.... something that looks like a kernel
Ooops.  I was running automake and got the following:
kernel BUG at inode.c:486!
invalid operand: 0000
CPU:    0
EIP:    0010:[<c013fa2b>]
EFLAGS: 00010286

...

I'm gonna try 2.4.4 for now.  But if anyone is interested in looking
into this deeper, I can send the whole "oops" message and whatever other
info needed to debug this.


-- 
Edsel Adap
edsel@adap.org
http://www.adap.org/~edsel/          LINUX - the choice of the GNU generation

"Netscape is an application which grows to fill all available memory."  - me

Re: ln -s broken on 2.4.5

[LA Walsh]

Marcus Meissner wrote:

> $ ln -s fupp/bar bar
> $ ls -la bar

---
    Is it peculiar to a specific architecture?
    What does strace show for args to the symlink cmd?
-l
--
The above thoughts and           | They may have nothing to do with
writings are my own.             | the opinions of my employer. :-)
L A Walsh                        | Trust Technology, Core Linux, SGI
law@sgi.com                      | Voice: (650) 933-5338

Re: ln -s broken on 2.4.5

[Alan Cox]

> > What file system. Its find on my 2.4.5-ac with ext2
> 
> 100% reproducible on NFS and EXT2 here, with following:


> $ ls -la bar
> lrwxrwxrwx   1 marcus   users           3 May 30 20:30 bar -> bar

bash-2.04$ uname -a
Linux irongate.swansea.linux.org.uk 2.4.5-ac2 #163 Mon May 28 22:56:38 BST 2001 i686 unknown
bash-2.04$ ln -s frobnitz flop
bash-2.04$ ls -l f*
lrwxrwxrwx    1 alan     users           8 May 30 20:50 flop -> frobnitz

bash-2.04$ gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-81

Re: ln -s broken on 2.4.5

[Marcus Meissner]

On Wed, May 30, 2001 at 09:08:56PM +0100, Alan Cox wrote:
> > > What file system. Its find on my 2.4.5-ac with ext2
> > 
> > 100% reproducible on NFS and EXT2 here, with following:
> 
> 
> > $ ls -la bar
> > lrwxrwxrwx   1 marcus   users           3 May 30 20:30 bar -> bar
> 
> bash-2.04$ uname -a
> Linux irongate.swansea.linux.org.uk 2.4.5-ac2 #163 Mon May 28 22:56:38 BST 2001 i686 unknown
> bash-2.04$ ln -s frobnitz flop
> bash-2.04$ ls -l f*
> lrwxrwxrwx    1 alan     users           8 May 30 20:50 flop -> frobnitz
> 
> bash-2.04$ gcc -v
> Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
> gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-81

The problem is only there if you specify a directory for the linked to
component.

[marcus@wine /tmp]$ strace -f ln -s fupp/berk xxx
execve("/bin/ln", ["ln", "-s", "fupp/berk", "xxx"], [/* 39 vars */]) = 0
... ld stuff ... locale stuff ... 
lstat64("xxx", 0xbffff47c)              = -1 ENOENT (No such file or directory)
lstat64("xxx", 0xbffff47c)              = -1 ENOENT (No such file or directory)
symlink("fupp/berk", "xxx")             = 0
_exit(0)                                = ?
[marcus@wine /tmp]$ ll xxx
lrwxrwxrwx   1 marcus   users           3 May 30 22:36 xxx -> xxx
[marcus@wine /tmp]$ uname -a
Linux wine.lst.de 2.4.5-ac4 #3 SMP Tue May 29 18:24:07 CEST 2001 i686 unknown
[marcus@wine /tmp]$ 

It works just wonderful with previous kernels.

Ciao, Marcus

Re: ln -s broken on 2.4.5

[Sergey Kubushin]

On Wed, 30 May 2001, Marcus Meissner wrote:

> On Wed, May 30, 2001 at 09:08:56PM +0100, Alan Cox wrote:
> > > > What file system. Its find on my 2.4.5-ac with ext2
> > >
> > > 100% reproducible on NFS and EXT2 here, with following:
> >
> >
> > > $ ls -la bar
> > > lrwxrwxrwx   1 marcus   users           3 May 30 20:30 bar -> bar
> >
> > bash-2.04$ uname -a
> > Linux irongate.swansea.linux.org.uk 2.4.5-ac2 #163 Mon May 28
> 22:56:38 BST 2001 i686 unknown
> > bash-2.04$ ln -s frobnitz flop
> > bash-2.04$ ls -l f*
> > lrwxrwxrwx    1 alan     users           8 May 30 20:50 flop ->
> frobnitz
> >
> > bash-2.04$ gcc -v
> > Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
> > gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-81
>
> The problem is only there if you specify a directory for the linked to
> component.
>
> [marcus@wine /tmp]$ strace -f ln -s fupp/berk xxx
> execve("/bin/ln", ["ln", "-s", "fupp/berk", "xxx"], [/* 39 vars */]) =
> 0
> ... ld stuff ... locale stuff ...
> lstat64("xxx", 0xbffff47c)              = -1 ENOENT (No such file or
> directory)
> lstat64("xxx", 0xbffff47c)              = -1 ENOENT (No such file or
> directory)
> symlink("fupp/berk", "xxx")             = 0
> _exit(0)                                = ?
> [marcus@wine /tmp]$ ll xxx
> lrwxrwxrwx   1 marcus   users           3 May 30 22:36 xxx -> xxx
> [marcus@wine /tmp]$ uname -a
> Linux wine.lst.de 2.4.5-ac4 #3 SMP Tue May 29 18:24:07 CEST 2001 i686
> unknown
> [marcus@wine /tmp]$
>
> It works just wonderful with previous kernels.

Works here:

=== Cut ===
[root@nomad tmp]# uname -a
Linux nomad.cyberbills.com 2.4.5ac4 #1 SMP Wed May 30 11:55:15 PDT 2001 i686
unknown
[root@nomad tmp]# touch 2/dummy
[root@nomad tmp]# ln -s 2/dummy very_dummy
[root@nomad tmp]# ls -l very_dummy
lrwxrwxrwx    1 root     root            7 May 30 14:37 very_dummy -> 2/dummy
=== Cut ===

EXT2, loaded as module.

There are other problems (may be caused by R.Gooch's latest patch,
devfs-177) - no module autoloading complaining about "/dev//floppy/0" etc.
(there are 2 slashes after /dev, it's not a mistake). Recompiling ac5
without that patch, may be it'll help.

---
Sergey Kubushin				Sr. Unix Administrator
CyberBills, Inc.			Phone:	702-567-8857
874 American Pacific Dr,		Fax:	702-567-8808
Henderson, NV 89014

Re: ln -s broken on 2.4.5

[Mike Castle]

On Wed, May 30, 2001 at 11:30:05PM +0200, Marcus Meissner wrote:
> The problem is only there if you specify a directory for the linked to
> component.
> 
> [marcus@wine /tmp]$ strace -f ln -s fupp/berk xxx

Is it only a directory, or the length?

ln -s fupp_berk xxx 

for instance.
-- 
     Mike Castle      dalgoda@ix.netcom.com      www.netcom.com/~dalgoda/
    We are all of us living in the shadow of Manhattan.  -- Watchmen
fatal ("You are in a maze of twisty compiler features, all different"); -- gcc

Re: ln -s broken on 2.4.5

[Rasmus B. Hansen]

On Wed, 30 May 2001, Marcus Meissner wrote:

> The problem is only there if you specify a directory for the linked to
> component.

I do still not see those problems:

moffe@grignard:/tmp/test# ls -la
totalt 1
drwxr-xr-x    2 moffe    users          48 ons maj 30 23:43:46 2001 .
drwxrwxrwt   13 root     root          496 ons maj 30 23:43:54 2001 ..
moffe@grignard:/tmp/test# ln -s foo/test bar
moffe@grignard:/tmp/test# ls -la
totalt 1
drwxr-xr-x    2 moffe    users          72 ons maj 30 23:44:32 2001 .
drwxrwxrwt   13 root     root          496 ons maj 30 23:43:54 2001 ..
lrwxrwxrwx    1 moffe    users           8 ons maj 30 23:44:32 2001 bar -> foo/test
moffe@grignard:/tmp/test# mkdir test
moffe@grignard:/tmp/test# ln -s test/bar foo
moffe@grignard:/tmp/test# ls -la
totalt 2
drwxr-xr-x    3 moffe    users         120 ons maj 30 23:44:48 2001 .
drwxrwxrwt   13 root     root          496 ons maj 30 23:43:54 2001 ..
lrwxrwxrwx    1 moffe    users           8 ons maj 30 23:44:32 2001 bar -> foo/test
lrwxrwxrwx    1 moffe    users           8 ons maj 30 23:44:48 2001 foo -> test/bar
drwxr-xr-x    2 moffe    users          48 ons maj 30 23:44:40 2001 test
moffe@grignard:/tmp/test# mkdir test/foo
moffe@grignard:/tmp/test# ln -s test/foo foo2
moffe@grignard:/tmp/test# ls -la
totalt 2
drwxr-xr-x    3 moffe    users         144 ons maj 30 23:45:11 2001 .
drwxrwxrwt   13 root     root          496 ons maj 30 23:43:54 2001 ..
lrwxrwxrwx    1 moffe    users           8 ons maj 30 23:44:32 2001 bar -> foo/test
lrwxrwxrwx    1 moffe    users           8 ons maj 30 23:44:48 2001 foo -> test/bar
lrwxrwxrwx    1 moffe    users           8 ons maj 30 23:45:11 2001 foo2 -> test/foo
drwxr-xr-x    3 moffe    users          72 ons maj 30 23:45:01 2001 test

moffe@grignard:/tmp/test# uname -m
i586
moffe@grignard:/tmp/test# gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-85)
moffe@grignard:/tmp/test# uname -r
2.4.5
moffe@grignard:/tmp/test# ldd --version
ldd (GNU libc) 2.2.3

Rasmus

-- 
-- [ Rasmus 'Møffe' Bøg Hansen ] --------------------------------------
If you don't receive an answer, then it either indicates that the bug is
too obvious or too difficult.
                                                       -- Manfred Spraul
-------------------------------- [ moffe at amagerkollegiet dot dk ] --

Re: ln -s broken on 2.4.5

[Alan Cox]

> The problem is only there if you specify a directory for the linked to
> component.
> 
> [marcus@wine /tmp]$ strace -f ln -s fupp/berk xxx
> execve("/bin/ln", ["ln", "-s", "fupp/berk", "xxx"], [/* 39 vars */]) = 0
> ... ld stuff ... locale stuff ... 

bash-2.04$ ln -s foo/frob eep
bash-2.04$ ls -l eep
lrwxrwxrwx    1 alan     users           8 May 30 22:19 eep -> foo/frob

Re: ln -s broken on 2.4.5

[Marcus Meissner]

On Wed, May 30, 2001 at 10:49:18PM +0100, Alan Cox wrote:
> > The problem is only there if you specify a directory for the linked to
> > component.
> > 
> > [marcus@wine /tmp]$ strace -f ln -s fupp/berk xxx
> > execve("/bin/ln", ["ln", "-s", "fupp/berk", "xxx"], [/* 39 vars */]) = 0
> > ... ld stuff ... locale stuff ... 
> 
> bash-2.04$ ln -s foo/frob eep
> bash-2.04$ ls -l eep
> lrwxrwxrwx    1 alan     users           8 May 30 22:19 eep -> foo/frob

*sigh*

I just rebooted and it is no longer reproducable.

Sorry for the confusion caused.

Ciao, Marcus