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Date: Mon, 2 May 2005 16:02:33 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.5.16-1: chmod problem
Message-ID: <20050502140233.GH8522@calimero.vinschen.de>
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References: <C833F6C0EF3DD24DA46FADF0A87466931EA03D AT fe-mail18 DOT de DOT bosch DOT com>
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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

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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