include/ipc: Don't dereference symlinks when subscribing to a topic

The `_ipc_endpoint_topic_subscribe()' function dereferences symbolic
links when subscribing to a topic, causing symbolic links to be
created in the wrong directory if the topic already exists.
This commit changes the flags that `_ipc_endpoint_topic_subscribe()'
passes to `ln' so that the target won't be dereferenced if it refers
to a symbolic link.

diff --git a/include/ipc.sh b/include/ipc.sh
index bce6f08240a20fe21a094fd124b347293d4b6098..c0b99bc1f792a2471f414c46974cebab97b68c2c 100644 (file)
--- a/include/ipc.sh
+++ b/include/ipc.sh
@@ -654,7 +654,7 @@ _ipc_endpoint_topic_subscribe() {
                return 1
        fi
 
-       if ! ln -sf "$topicdir" "$__ipc_root/$endpoint/subscriptions/$topic"; then
+       if ! ln -sfn "$topicdir" "$__ipc_root/$endpoint/subscriptions/$topic"; then
                rm -f "$topicdir/$__ipc_self"
                return 1
        fi