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From: "A. Alper Atici" <alperatici AT ttnet DOT net DOT tr>
Subject: Some hard/softlink issues on NTFS
Date: Fri, 30 Apr 2004 16:52:12 +0300
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The following fun happens on NTFS of a local XP-Pro SP1 with ntsec, Cygwin 1.5.9:


$ id
uid=1003(ati) gid=0(root) groups=0(root),513(nobody),544(Administrators),545(Users)
$ ll -d ../`basename $PWD`
drwxr-xr-x+   2 ati      root            0 Apr 30 15:38 ../t
$ touch aa
$ ll
total 0
-rw-r--r--    1 ati      root            0 Apr 30 15:38 aa
$ chown admin aa
$ ln aa bb
$ ll
total 0
-rw-r--r--    1 admin    root            0 Apr 30 15:38 aa
-rwxr-xr-x    1 ati      root            0 Apr 30 15:38 bb
$ chmod g+w aa
$ ln aa cc
$ ll
total 0
-rw-rw-r--    2 admin    root            0 Apr 30 15:38 aa
-rwxr-xr-x    1 ati      root            0 Apr 30 15:38 bb
-rw-rw-r--    2 admin    root            0 Apr 30 15:38 cc
$ ln -s cc dd
$ ll
total 0
-rw-rw-r--    2 admin    root            0 Apr 30 15:38 aa
-rwxr-xr-x    1 ati      root            0 Apr 30 15:38 bb
-rw-rw-r--    2 admin    root            0 Apr 30 15:38 cc
lrwxrwxrwx    1 ati      root           84 Apr 30 15:39 dd -> cc
$ chown admin dd
$ ll
total 0
-rw-rw-r--    2 admin    root            0 Apr 30 15:38 aa
-rwxr-xr-x    1 ati      root            0 Apr 30 15:38 bb
-rw-rw-r--    2 admin    root            0 Apr 30 15:38 cc
lrwxrwxrwx    1 admin    root           84 Apr 30 15:39 dd -> cc
$ rm dd
rm: remove `dd'? y
rm: cannot unlink `dd': Permission denied
$ rm cc
rm: remove `cc'? y
$ ll
total 0
-rw-rw-r--    1 admin    root            0 Apr 30 15:38 aa
-rwxr-xr-x    1 ati      root            0 Apr 30 15:38 bb
lrwxrwxrwx    1 admin    root           84 Apr 30 15:39 dd -> cc
$ rm dd
rm: remove `dd'? y
rm: cannot unlink `dd': Permission denied
$ chmod g-w aa
$ rm aa
rm: remove write-protected file `aa'? y
$ ll
-rwxr-xr-x    1 ati      root            0 Apr 30 15:38 bb
lrwxrwxrwx    1 admin    root           84 Apr 30 15:39 dd -> cc


In case you wonder who user admin is, here's its id output:
uid=500(admin) gid=0(root) groups=0(root),513(nobody),544(Administrators),545(Users)


--
A. Alper Atici               OpenPGP KeyID: 0xB824F550


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