Mail Archives: cygwin/2005/05/03/02:53:07
Hello
I took a look at the drive properties ones more.
The following acl rights has been given me by the network administrator:
- change file permission: no
- all others: yes
Unfortunately the Windows has a special attribute 'write protection'
which can be set in the mask for file's attribute.
So there is a kind of conflict now. Despite I can't change file permissions (in the acl)
I can every time set/reset the bit 'write protection'.
I see, it is very interesting feature of the so called operating system.
There is the question at this place:
Should the implementation of chmod allow the setting/resetting of the 'write protection' bit
in spite of the missing permission 'change file permission' in the acl ?
Roman
-----Ursprüngliche Nachricht-----
Von: cygwin-owner AT cygwin DOT com [mailto:cygwin-owner AT cygwin DOT com]Im Auftrag
von Corinna Vinschen
Gesendet: Montag, 2. Mai 2005 16:03
An: cygwin AT cygwin DOT com
Betreff: Re: 1.5.16-1: chmod problem
On May 2 07:41, Pach Roman (GS-EC/ESA4) * wrote:
> Hello,
> I have tried now using strace.
> The file strace.14 has been generated for cygwin-1.5.14-1, and strace.15 for cygwin-1.5.15-1.
>
> The command used was:
> > strace chmod +w /u/tmp/yahoo > /tmp/strace.15 2>&1
>
> The concerned part from strace.14:
> ...
> 3310 116505 [main] chmod 1448 set_process_privilege: 0 = set_process_privilege (SeRestorePrivilege, 1)
> 244 116749 [main] chmod 1448 set_file_attribute: 0 = set_file_attribute (u:\tmp\yahoo, -1, -1, 0x124)
> 10376 127125 [main] chmod 1448 chmod: 0 = chmod (/u/tmp/yahoo, 0x124)
> 699 127824 [main] chmod 1448 chdir: dir '/c'
> ...
>
> And the same from strace.15
> ...
> 199 5004896 [main] chmod 1436 fhandler_base::open: (u:\tmp\yahoo, 0x110000)
> 1441 5006337 [main] chmod 1436 seterrno_from_win_error: /netrel/src/cygwin-1.5.15-1/winsup/cygwin/fhandler.cc:668 windows error 5
> 216 5006553 [main] chmod 1436 geterrno_from_win_error: windows error 5 == errno 13
> 186 5006739 [main] chmod 1436 fhandler_base::open: C0000022 = NtCreateFile (0x0, E0100, u:\tmp\yahoo, io, NULL, 0, 7, 1, 4400, NULL, 0)
> 187 5006926 [main] chmod 1436 fhandler_base::open: 0 = fhandler_base::open (u:\tmp\yahoo, 0x110000)
> 181 5007107 [main] chmod 1436 fhandler_base::open_fs: 0 = fhandler_disk_file::open (u:\tmp\yahoo, 0x10000)
> 185 5007292 [main] chmod 1436 chmod: -1 = chmod (/u/tmp/yahoo, 0x1B6)
> 1226 5008518 [main] chmod 1436 open: open (/usr/share/locale/locale.alias, 0x0)
> ...
>
> The first thing I can see is that 'fhandler_base::open:' returns with the 'windows error 5'
> Is that the reason for chmod to fail later?
Yes. Opening the file fails with "access denied" and then chmod has
no file handle to work with.
I'm sorry but I tried with 1.5.15 and 1.5.16 and I couldn't find a
situation in which this happens for me.
Corinna
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Corinna Vinschen Please, send mails regarding Cygwin to
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Red Hat, Inc.
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