Merge pull request 'Allow `listen_port` to return selected port number' (#1) from midokura-xavi/libweb:listen-port into master

Reviewed-on: https://gitea.privatedns.org/xavi/libweb/pulls/1

2 files changed, 18 insertions, 5 deletions

diff --git a/examples/hello/README.md b/examples/hello/README.md
index 24b747b..79c57fc 100644
--- a/examples/hello/README.md
+++ b/examples/hello/README.md
@@ -1,9 +1,13 @@
 # "Hello world" example
 
 This example shows a minimal setup for an application using `libweb`. When
-executed, it starts a HTTP/1.1 server on port `8080` and returns an example
-website reading "Hello from libweb!" when either `/` or `/index.html` are
-accessed by clients.
+executed, it starts a HTTP/1.1 server on a random port, which is then printed
+to the standard output, and returns an example website when either `/` or
+`/index.html` are accessed by clients, reading:
+
+```
+Hello from libweb!
+```
 
 ## How to build
 
diff --git a/examples/hello/main.c b/examples/hello/main.c
index 59643ec..62e2a9e 100644
--- a/examples/hello/main.c
+++ b/examples/hello/main.c
@@ -81,7 +81,6 @@ static int on_length(const unsigned long long len,
 int main(int argc, char *argv[])
 {
     int ret = EXIT_FAILURE;
-    const short port = 8080;
     const struct handler_cfg cfg =
     {
         .length = on_length
@@ -103,12 +102,22 @@ int main(int argc, char *argv[])
             goto end;
         }
 
-    if (handler_listen(h, port))
+    unsigned short outport;
+
+    if (handler_listen(h, 0, &outport))
     {
         fprintf(stderr, "%s: handler_listen failed\n", __func__);
         goto end;
     }
 
+    printf("Listening on port %hu\n", outport);
+
+    if (handler_loop(h))
+    {
+        fprintf(stderr, "%s: handler_loop failed\n", __func__);
+        goto end;
+    }
+
     ret = EXIT_SUCCESS;
 
 end: