fdpass: avoid memory leak in example.

[ccan] / ccan / io / fdpass / _info

diff --git a/ccan/io/fdpass/_info b/ccan/io/fdpass/_info
index ba09025aaf8e5bed001debd89a018f9385415910..0b10e8a8bbf489bb2ddcf6223d27ece866240610 100644 (file)
--- a/ccan/io/fdpass/_info
+++ b/ccan/io/fdpass/_info
@@ -32,12 +32,20 @@
  *                                     read_more, buf);
  *     }
  *
+ *     // Clean up allocation so -fsanitize=address doesn't see leak!
+ *     static void free_buf(struct io_conn *c, struct buf *buf)
+ *     {
+ *             free(buf);
+ *     }
+ *
  *     // Child has received fd, start reading loop.
  *     static struct io_plan *got_infd(struct io_conn *conn, int *infd)
  *     {
  *             struct buf *buf = calloc(1, sizeof(*buf));
+ *             struct io_conn *new_conn;
  *
- *             io_new_conn(NULL, *infd, read_more, buf);
+ *             new_conn = io_new_conn(NULL, *infd, read_more, buf);
+ *             io_set_finish(new_conn, free_buf, buf);
  *             return io_close(conn);
  *     }
  *     // Child is receiving the fd to read into.