basic/set: let set_put_strdup() create the set with string hash ops

If we're using a set with _put_strdup(), most of the time we want to use
string hash ops on the set, and free the strings when done. This defines
the appropriate a new string_hash_ops_free structure to automatically free
the keys when removing the set, and makes set_put_strdup() and set_put_strdupv()
instantiate the set with those hash ops.

hashmap_put_strdup() was already doing something similar.

(It is OK to instantiate the set earlier, possibly with a different hash ops
structure. set_put_strdup() will then use the existing set. It is also OK
to call set_free_free() instead of set_free() on a set with
string_hash_ops_free, the effect is the same, we're just overriding the
override of the cleanup function.)

No functional change intended.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/login/logind-acl.c b/src/login/logind-acl.c
index ff192c53eb..76af208af1 100644
--- a/src/login/logind-acl.c
+++ b/src/login/logind-acl.c
@@ -206,7 +206,7 @@ int devnode_acl_all(const char *seat,
                         continue;
 
                 log_device_debug(d, "Found udev node %s for seat %s", node, seat);
-                r = set_put_strdup(nodes, node);
+                r = set_put_strdup(&nodes, node);
                 if (r < 0)
                         return r;
         }