shared/acl-util: add mask only when needed, always add base ACLs

For ACLs to be valid, a set of entries for user, group, and other
must be always present. Always add those entries.

While at it, only add the mask ACL if it is actually required, i.e.
when at least on ACL for non-owner group or user exists.

1 files changed, 19 insertions, 6 deletions

diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index 3c8993e894..7edeeb7428 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -614,22 +614,35 @@ static int get_acls_from_arg(Item *item) {
 }
 
 static int path_set_acl(const char *path, acl_type_t type, acl_t acl, bool modify) {
-        _cleanup_(acl_freep) acl_t cleanme = NULL;
+        _cleanup_(acl_freep) acl_t dup = NULL;
         int r;
 
         if (modify) {
-                r = acls_for_file(path, type, acl, &cleanme);
+                r = acls_for_file(path, type, acl, &dup);
                 if (r < 0)
                         return r;
-                acl = cleanme;
-        };
 
-        r = acl_set_file(path, type, acl);
+                r = calc_acl_mask_if_needed(&dup);
+                if (r < 0)
+                        return r;
+        } else {
+                dup = acl_dup(acl);
+                if (!dup)
+                        return -errno;
+
+                /* the mask was already added earlier if needed */
+        }
+
+        r = add_base_acls_if_needed(&dup, path);
+        if (r < 0)
+                return r;
+
+        r = acl_set_file(path, type, dup);
         if (r < 0) {
                 _cleanup_(acl_free_charpp) char *t;
 
                 r = -errno;
-                t = acl_to_any_text(acl, NULL, ',', TEXT_ABBREVIATE);
+                t = acl_to_any_text(dup, NULL, ',', TEXT_ABBREVIATE);
                 log_error_errno(r,
                                 "Setting %s ACL \"%s\" on %s failed: %m",
                                 type == ACL_TYPE_ACCESS ? "access" : "default",