Second part of fix for bug #8443 - Default user entry is set to minimal permissions...

Be smarter about setting default permissions when a ACL_USER_OBJ isn't given. Use the principle of least surprises for the user.

Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Fri Sep  9 00:26:08 CEST 2011 on sn-devel-104

diff --git a/source3/smbd/posix_acls.c b/source3/smbd/posix_acls.c
index 890792464e516cbd66fc4368895ecfb7a983787f..b69177a92db9e460395ccbe902cbae17f1862e4a 100644 (file)
--- a/source3/smbd/posix_acls.c
+++ b/source3/smbd/posix_acls.c
@@ -1409,29 +1409,32 @@ static bool ensure_canon_entry_valid(connection_struct *conn, canon_ace **pp_ace
                pace->unix_ug.uid = pst->st_ex_uid;
                pace->trustee = *pfile_owner_sid;
                pace->attr = ALLOW_ACE;
+               /* Start with existing permissions, principle of least
+                  surprises for the user. */
+               pace->perms = pst->st_ex_mode;
 
                if (setting_acl) {
                        /* See if the owning user is in any of the other groups in
-                          the ACE. If so, OR in the permissions from that group. */
+                          the ACE, or if there's a matching user entry.
+                          If so, OR in the permissions from that entry. */
 
-                       bool group_matched = False;
                        canon_ace *pace_iter;
 
                        for (pace_iter = *pp_ace; pace_iter; pace_iter = pace_iter->next) {
-                               if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
+                               if (pace_iter->type == SMB_ACL_USER &&
+                                               pace_iter->unix_ug.uid == pace->unix_ug.uid) {
+                                       pace->perms |= pace_iter->perms;
+                               } else if (pace_iter->type == SMB_ACL_GROUP_OBJ || pace_iter->type == SMB_ACL_GROUP) {
                                        if (uid_entry_in_group(conn, pace, pace_iter)) {
                                                pace->perms |= pace_iter->perms;
-                                               group_matched = True;
                                        }
                                }
                        }
 
-                       /* If we only got an "everyone" perm, just use that. */
-                       if (!group_matched) {
+                       if (pace->perms == 0) {
+                               /* If we only got an "everyone" perm, just use that. */
                                if (got_other)
                                        pace->perms = pace_other->perms;
-                               else
-                                       pace->perms = 0;
                        }
 
                        apply_default_perms(params, is_directory, pace, S_IRUSR);