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Re: Gnulib ACL wrappers

From: Paul Eggert
Subject: Re: Gnulib ACL wrappers
Date: Thu, 28 Aug 2014 11:33:01 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0

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.

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