Improved peer client connection websocat error handling.

src/comm/comm_client.cpp

@@ -45,9 +45,10 @@ namespace comm
             close(write_pipe[0]);
             close(read_pipe[1]);
 
-            // Wait for some time and check if websocat is still running properly.
-            util::sleep(20);
-            if (kill(pid, 0) == -1)
+            // Wait for some time and check if websocat process has closed the pipe.
+            util::sleep(300);
+            pollfd fds[1] = {{read_fd}};
+            if (poll(fds, 1, 0) == -1 || (fds[0].revents & POLLHUP))
             {
                 close(read_fd);
                 close(write_fd);

src/comm/comm_server.cpp

@@ -247,7 +247,7 @@ namespace comm
             comm::comm_client client;
             if (client.start(host, port, metric_thresholds, conf::cfg.peermaxsize) == -1)
             {
-                LOG_ERR << "Outbound connection attempt failed";
+                LOG_ERR << "Outbound connection attempt failed: " << host << ":" << std::to_string(port);
             }
             else
             {

src/util.cpp

@@ -204,6 +204,7 @@ namespace util
         sigset_t mask;
         sigemptyset(&mask);
         sigaddset(&mask, SIGINT);
+        sigaddset(&mask, SIGPIPE);
         pthread_sigmask(SIG_BLOCK, &mask, NULL);
     }