acl: simplification

[Bruno Haible]

In the MacOS X case, we need to create an empty acl_t object. This simplifies
the code for doing that, so that we don't need to know about the (very
platform dependent) textual representation.


2008-06-07  Bruno Haible  <address@hidden>

        * lib/set-mode-acl.c (qset_acl): Use acl_init(), not acl_from_text(),
        to construct an empty ACL.

*** lib/set-mode-acl.c.orig     2008-06-08 04:35:46.000000000 +0200
--- lib/set-mode-acl.c  2008-06-08 04:35:27.000000000 +0200
***************
*** 153,165 ****
      acl = acl_get_file (name, ACL_TYPE_ACCESS);
    if (acl)
      {
! #   if HAVE_ACL_COPY_EXT_NATIVE && HAVE_ACL_CREATE_ENTRY_NP /* MacOS X */
!       static const char empty_acl_text[] = "!#acl 1\n";
! #   else /* Unknown flavor of POSIX-like ACLs */
! #    error Unknown flavor of POSIX-like ACLs - add support for your platform.
! #   endif
! 
!       acl = acl_from_text (empty_acl_text);
        if (acl)
        {
          if (HAVE_ACL_SET_FD && desc != -1)
--- 153,159 ----
      acl = acl_get_file (name, ACL_TYPE_ACCESS);
    if (acl)
      {
!       acl = acl_init (0);
        if (acl)
        {
          if (HAVE_ACL_SET_FD && desc != -1)