Support Posix ACL APIs on MS-Windows.

 src/w32.c: Include sddl.h and sys/acl.h.
 (SDDL_REVISION_1): Define if not already defined.
 (g_b_init_get_security_descriptor_dacl)
 (g_b_init_convert_sd_to_sddl, g_b_init_convert_sddl_to_sd)
 (g_b_init_is_valid_security_descriptor)
 (g_b_init_set_file_security): New static flags.
 (globals_of_w32): Initialize them to zero.
 (SetFileSecurity_Name): New string constant.
 (SetFileSecurity_Proc, GetSecurityDescriptorDacl_Proc)
 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)
 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)
 (IsValidSecurityDescriptor_Proc): New typedefs.
 (get_file_security, get_security_descriptor_owner)
 (get_security_descriptor_group): Set errno to ENOTSUP.
 (set_file_security, get_security_descriptor_dacl)
 (is_valid_security_descriptor, convert_sd_to_sddl)
 (convert_sddl_to_sd, acl_valid, acl_to_text, acl_from_text)
 (acl_free, acl_get_file, acl_set_file): New functions.
 src/fileio.c (Fcopy_file) [WINDOWSNT]: Support copying ACLs.

 nt/inc/sys/acl.h: New file.
 nt/inc/ms-w32.h (ENOTSUP): Define if undefined.
 nt/config.nt (HAVE_POSIX_ACL): Define.

 doc/lispref/files.texi (File Attributes, Changing Files): Update to include
 MS-Windows support for ACLs.

4 files changed, 40 insertions, 0 deletions

diff --git a/nt/ChangeLog b/nt/ChangeLog
index bcd15422bdf..114fa826b2b 100644
--- a/nt/ChangeLog
+++ b/nt/ChangeLog
@@ -1,3 +1,11 @@
+2012-12-17  Eli Zaretskii  <eliz@gnu.org>
+
+        * inc/sys/acl.h: New file.
+
+        * inc/ms-w32.h (ENOTSUP): Define if undefined.
+
+        * config.nt (HAVE_POSIX_ACL): Define.
+
 2012-12-15  Eli Zaretskii  <eliz@gnu.org>
 
         * inc/ms-w32.h (sys_unlink): Provide prototype.
diff --git a/nt/config.nt b/nt/config.nt
index db26bf6cbae..aef92a8cccd 100644
--- a/nt/config.nt
+++ b/nt/config.nt
@@ -725,6 +725,9 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 /* Define to 1 if you have the <png.h> header file. */
 #undef HAVE_PNG_H
 
+/* Define to 1 if you have the POSIX ACL support. */
+#define HAVE_POSIX_ACL 1
+
 /* Define to 1 if you have the `posix_memalign' function. */
 #undef HAVE_POSIX_MEMALIGN
 
diff --git a/nt/inc/ms-w32.h b/nt/inc/ms-w32.h
index aab30391063..78e1d544cde 100644
--- a/nt/inc/ms-w32.h
+++ b/nt/inc/ms-w32.h
@@ -293,6 +293,10 @@ extern struct tm *localtime_r (time_t const * restrict, struct tm * restrict);
 #define NSIG 23
 #endif
 
+#ifndef ENOTSUP
+#define ENOTSUP ENOSYS
+#endif
+
 #ifdef _MSC_VER
 typedef int sigset_t;
 typedef int ssize_t;
diff --git a/nt/inc/sys/acl.h b/nt/inc/sys/acl.h
new file mode 100644
index 00000000000..3133e3bfc09
--- /dev/null
+++ b/nt/inc/sys/acl.h
@@ -0,0 +1,25 @@
+/* Emulation of Posix ACLs for Windows.  */
+
+#ifndef ACL_H
+#define ACL_H
+
+#define NOMINMAX 1      /* don't define min and max */
+#include <windows.h>
+
+typedef PSECURITY_DESCRIPTOR acl_t;
+typedef unsigned acl_type_t;
+
+/* Values of acl_type_t  */
+#define ACL_TYPE_ACCESS  0
+#define ACL_TYPE_DEFAULT 1
+
+typedef unsigned acl_perm_t;
+
+extern int    acl_valid (acl_t);
+extern acl_t  acl_get_file (const char *, acl_type_t);
+extern int    acl_set_file (const char *, acl_type_t, acl_t);
+extern char * acl_to_text (acl_t, ssize_t *);
+extern acl_t  acl_from_text (const char *);
+extern int    acl_free (void *);
+
+#endif  /* ACL_H */