1 files changed, 21 insertions, 0 deletions
diff --git a/src/libunixonacid/unixmessage_receiver_hasmsginbuf.c b/src/libunixonacid/unixmessage_receiver_hasmsginbuf.c
new file mode 100644
index 0000000..0a5f7d2
--- /dev/null
+++ b/src/libunixonacid/unixmessage_receiver_hasmsginbuf.c
@@ -0,0 +1,21 @@
+/* ISC license. */
+
+#include <stdint.h>
+#include <sys/uio.h>
+#include <skalibs/uint32.h>
+#include <skalibs/siovec.h>
+#include <skalibs/cbuffer.h>
+#include <skalibs/unixmessage.h>
+
+int unixmessage_receiver_hasmsginbuf (unixmessage_receiver_t const *b)
+{
+  size_t len = cbuffer_len(&b->mainb) ;
+  uint32_t mainlen ;
+  char pack[4] ;
+  struct iovec v[2] ;
+  if (len < 6) return 0 ;
+  cbuffer_rpeek(&b->mainb, v) ;
+  siovec_gather(v, 2, pack, 4) ;
+  uint32_unpack_big(pack, &mainlen) ;
+  return len - 6 >= mainlen ;
+}