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Message-ID: <42C68B1B.5010404@byu.net>
Date: Sat, 02 Jul 2005 06:39:55 -0600
From: Eric Blake <ebb9 AT byu DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: perl -x doesn't recognize file as executable
References: <42A32D8C DOT 9080408 AT scytek DOT de> <42A35971 DOT 8C69A2C5 AT dessent DOT net> <42A39676 DOT 9030208 AT scytek DOT de> <42A3A773 DOT 3C6AFA4A AT dessent DOT net>
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According to Brian Dessent on 6/5/2005 7:31 PM:

Sorry for a reply to an old thread, but I wanted to correct some
misinformation:

>>You mean special logic for windows file permissions (ACL?), not only
>>using the owner/group/other scheme?
>
> I think that it recognises files ending in ".exe" and special-cases
> them.
>
>>$ getfacl /cygdrive/c/Programme/NSIS/NSIS.exe
>># file: /cygdrive/c/Programme/NSIS/NSIS.exe
>># owner: Administratoren
>># group: none
>>user::rwx
>>group::---
>>group:SYSTEM:rwx
>>group:Benutzer:r-x
>>                  ^
>>with ------------|
>>
>>So it is executable. But ugo rights do not show this

There are two 'test's - the bash builtin, and /bin/test from coreutils.
/bin/test uses access()/eaccess()
(/usr/src/coreutils-5.3.0/src/test.c:552,
/usr/src/coreutils-5.3.0/lib/euidaccess.c) to determine if a file is
executable, which should leave it entirely in cygwin1.dll's hands (and
rely on cygwin's handling of spelling, ACLs, and ownerships).  bash uses
its own home-baked method (/usr/src/bash-3.0/test.c:223,609) using stat()
as its base, so it appears to ignore ACLs.  Please let me know if either
test or /bin/test gets a wrong answer in the presence of ACLs, in which
case I can report the bug upstream.  The original email made it sound like
only perl had the issue, and only when not using perl's access library.

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
cygwin bash/coreutils maintainer
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