1 files changed, 11 insertions, 0 deletions
diff --git a/src/libskabus/skabus_pub_message_getnfds.c b/src/libskabus/skabus_pub_message_getnfds.c
new file mode 100644
index 0000000..828a42d
--- /dev/null
+++ b/src/libskabus/skabus_pub_message_getnfds.c
@@ -0,0 +1,11 @@
+/* ISC license. */
+
+#include <skalibs/genalloc.h>
+
+#include <skabus/pub.h>
+
+int skabus_pub_message_getnfds (skabus_pub_t const *a)
+{
+  return genalloc_len(skabus_pub_cltinfo_t, &a->info) <= a->head ? -1 :
+   (int)genalloc_s(skabus_pub_cltinfo_t, &a->info)[a->head].nfds ;
+}