Re: chmod suddenly ceased to work on old files - NEW FINDINGS

["Pierre A. Humblet" <Pierre dot Humblet at ieee dot org>]

----- Original Message ----- 
From: "Corinna Vinschen" <corinna-cygwin@cygwin.com>
To: <cygwin-developers@cygwin.com>
Sent: Monday, August 01, 2005 8:22 AM
Subject: Re: chmod suddenly ceased to work on old files - NEW FINDINGS


> On Jul 14 12:43, Pierre A. Humblet wrote:
> > Corinna (and everybody),
> >
> > I looked into the problem reported in the thread.
> > http://cygwin.com/ml/cygwin/2005-07/msg00689.html
> >
> > The failure of chmod is a permission issue, due to a strange ACL
> > inherited from Windows. However I can't explain the failure.
> >
> >  853  315868 [main] chmod 2108 normalize_posix_path: src tg.pl
> >   833  316701 [main] chmod 2108 cwdstuff::get: posix /cygdrive/h/tmp
> >   919  317620 [main] chmod 2108 cwdstuff::get: (/cygdrive/h/tmp) = cwdstuff::get (0x22EAD0, 260, 1, 0), errno 0
> >   833  318453 [main] chmod 2108 normalize_posix_path: /cygdrive/h/tmp/tg.pl = normalize_posix_path (tg.pl)
> >   855  319308 [main] chmod 2108 mount_info::conv_to_win32_path: conv_to_win32_path (/cygdrive/h/tmp/tg.pl)
> >   851  320159 [main] chmod 2108 mount_info::cygdrive_win32_path: src '/cygdrive/h/tmp/tg.pl', dst 'h:\tmp\tg.pl'
> >   833  320992 [main] chmod 2108 set_flags: flags: binary (0x2)
> >   829  321821 [main] chmod 2108 mount_info::conv_to_win32_path: src_path /cygdrive/h/tmp/tg.pl, dst h:\tmp\tg.pl,
flags
> > 0x22, rc 0
> >  1473  323294 [main] chmod 2108 symlink_info::check: not a symlink
> >   949  324243 [main] chmod 2108 symlink_info::check: 0 = symlink.check (h:\tmp\tg.pl, 0x22E790) (0x22)
> >   844  325087 [main] chmod 2108 path_conv::check: this->path(h:\tmp\tg.pl), has_acls(1)
> >  1039  326126 [main] chmod 2108 build_fh_pc: fh 0x61156018
> >   857  326983 [main] chmod 2108 fhandler_base::open: (h:\tmp\tg.pl, 0x110000)
> >  1647  328630 [main] chmod 2108 seterrno_from_win_error: /netrel/src/cygwin-1.5.18-1/winsup/cygwin/fhandler.cc:666
> > windows error 5
> >  1109  329739 [main] chmod 2108 geterrno_from_win_error: windows error 5 == errno 13
> >   819  330558 [main] chmod 2108 __set_errno: void seterrno_from_win_error(const char*, int, DWORD):307 val 13
> >   814  331372 [main] chmod 2108 fhandler_base::open: C0000022 = NtCreateFile (0x0, E0100, h:\tmp\tg.pl, io, NULL, 0,
7,
> > 1, 4400, NULL, 0)
> >  1090  332462 [main] chmod 2108 fhandler_base::open: 0 = fhandler_base::open (h:\tmp\tg.pl, 0x110000)
> >   923  333385 [main] chmod 2108 fhandler_base::open_fs: 0 = fhandler_disk_file::open (h:\tmp\tg.pl, 0x10000)
> >  1110  334495 [main] chmod 2108 chmod: -1 = chmod (tg.pl, 0x1B0)
> >
> > ~/tmp $ cacls tg.pl
> > h:\tmp\tg.pl EU\fischron:C
> >              EU\MUC-ADM-FileOperators-Home-L:C
> >              VORDEFINIERT\Administrators:F
> >              EU\MUC-ADM-FileOperators-L:F
> >
> > See also Capture-1.jpg in http://cygwin.com/ml/cygwin/2005-07/msg00688.html
>
> I can't explain it even less.  Did you reproduce the problem?  I just
> tried it by creating a file with only one ACE, which has the two bits
> for "change permissions" and "take ownership" removed.  But when calling
> chmod on the file, it works as expected.  I've also tried the same with
> a parent directory with only the minimum nuber of entries and with the
> above bits removed in the "CREATOR OWNER" entry (well, you never know...).
> To no avail.  chmod doesn't complain.

There was a further e-mail from which came out the fact that it's a network drive.
So that makes understanding what's going on harder.
Still he was able to change his own permissions using the Windows GUI,
which is equivalent to a chmod, AFAIK.
Strange.

Pierre