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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Mon, 14 Apr 2003 22:32:01 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: John Williams <jwilliams AT itee DOT uq DOT edu DOT au>
cc: cygwin AT cygwin DOT com
Subject: Re: chmod again
In-Reply-To: <b7fpp1$o56$1@main.gmane.org>
Message-ID: <Pine.GSO.4.44.0304142230380.26381-100000@slinky.cs.nyu.edu>
Importance: Normal
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Tue, 15 Apr 2003, John Williams wrote:

> Hi there,
>
> Building a (cross-platform) uClinux kernel under Cygwin I stike a
> variant of the Cygwin chmod issue:
>
> The build process is to make the kernel, make the libs, make the user
> apps, then copy everything into a directory and run the utility genromfs
> over it.  This makes a romfs image of the file system which gets
> appended to the kernel and uploaded to the target board, ready to run.
>
> Here's the catch: the compiled and linked user executables coming out of
> my toolchain don't have the execute permissions set.  genromfs
> faithfully mirrors the file permissions, meaning that my user
> executables can't be exec'ed when my board boots up, failing because (of
> course) the files don't have execute permission.
>
> So, I naively tried to just do a chmod 777 on all of my user binaries
> then run genromfs over it, but chmod doesn't actually do anything, the
> permissions stay unchanged, as illustrated by the following log:
>
> jwilliams AT G435-9029 /cygdrive/d/uClinux-dist/user/init
> $ ls -alrt init
> -rw-r--r--    1 jwilliam mkgroup_    27984 Apr 15 11:45 init
>
> jwilliams AT G435-9029 /cygdrive/d/uClinux-dist/user/init
> $ chmod 777 init
>
> jwilliams AT G435-9029 /cygdrive/d/uClinux-dist/user/init
> $ ls -alrt init
> -rw-r--r--    1 jwilliam mkgroup_    27984 Apr 15 11:45 init
>
> I've checked the FAQ and tried the CYGWIN variable settings ntsec and
> nontsec, but it has no effect in the example presented above.
>
> How can I force Cygwin to get these permissions right?
>
> Thanks,
> John

John,

First off, make sure your /etc/passwd and /etc/group are up to date (see
<http://cygwin.com/cygwin-ug-net/ntsec.html#NTSEC-RELEASE1.3.20>).

Second, you might wish to attach the output of "cygcheck -svr", as per
<http://cygwin.com/bugs.html>.
	Igor
-- 
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