Re: Gnulib ACL wrappers

[Ken Brown <kbrown@cornell.edu>]

On 8/28/2014 2:33 PM, Paul Eggert wrote:
> Ken Brown wrote:
>> Or am I misunderstanding something?
>
> Sorry, I don't know; again, I don't use Cygwin and so can be only of
> limited help debugging it.  For what it's worth, on Solaris 11 an Emacs
> trunk configure says this:
>
> checking sys/acl.h usability... yes
> checking sys/acl.h presence... yes
> checking for sys/acl.h... yes
> checking for library containing acl_get_file... no
> checking for facl... yes
> checking for library containing acl_trivial... -lsec
> checking for acl_trivial... yes
>
> and 'truss' says that (copy-file "/etc/passwd" "~/passwd" nil nil nil t)
> executed the following system calls:
>
> facl(9, ACE_GETACLCNT, 0, 0x00000000)           = 3
> facl(9, ACE_GETACL, 3, 0x087BA410)              = 3
> facl(9, GETACLCNT, 0, 0x00000000)               Err#89 ENOSYS
> facl(10, ACE_SETACL, 3, 0x087BA410)             = 0
> fchmod(10, 0644)                                = 0
>
> which seems to indicate that the ACL stuff is working on Solaris, at
> least to some extent.  Perhaps you can look at the corresponding output
> on Cygwin and see where things are going wrong there.

I'm seeing something similar on Cygwin (except that Cygwin doesn't have 
acl_trivial), so I guess this is working as designed.  I was thrown off 
by the fact that so much of the ACL code in fileio.c is conditioned on 
HAVE_ACL_SET_FILE.  So I guess the functions that require this won't 
work on Solaris either.

Sorry for the noise, and thanks for your help.

Ken