Check accept(2) return for failure.

Fixes #668


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4635 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/vtc_http.c

@@ -815,6 +815,8 @@ cmd_http_accept(CMD_ARGS)
 	TCP_close(&hp->fd);
 	vtc_log(vl, 4, "Accepting");
 	hp->fd = accept(hp->sfd, NULL, NULL);
+	if (hp->fd < 0)
+		vtc_log(vl, 0, "Accepted failed: %s", strerror(errno));
 	vtc_log(vl, 3, "Accepted socket fd is %d", hp->fd);
 }
 

bin/varnishtest/vtc_server.c

@@ -101,7 +101,8 @@ server_thread(void *priv)
 		addr = (void*)&addr_s;
 		l = sizeof addr_s;
 		fd = accept(s->sock, addr, &l);
-		vtc_log(vl, 3, "Accepted socket fd is %d", fd);
+		if (fd < 0)
+			vtc_log(vl, 0, "Accepted failed: %s", strerror(errno));
 		http_process(vl, s->spec, fd, s->sock);
 		vtc_log(vl, 3, "shutting fd %d", fd);
 		assert((shutdown(fd, SHUT_WR) == 0)