From 71bb51c3fd32a3b6ed4accd1a17a5bacc7d82e3b Mon Sep 17 00:00:00 2001
From: zqmfb <267821100+angularbanjo@users.noreply.github.com>
Date: Wed, 25 Mar 2026 18:30:12 -0400
Subject: [PATCH] Clarify systemd socket selection logic

---
 src/command_network.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/command_network.cc b/src/command_network.cc
index f20888f6..71854b63 100644
--- a/src/command_network.cc
+++ b/src/command_network.cc
@@ -163,9 +163,12 @@ apply_scgi_systemd() {
   int selected_fd = -1;
   for (int i = 0; i < n; i++) {
     int fd = SD_LISTEN_FDS_START + i;
-    if (selected_fd == -1 && sd_is_socket(fd, AF_UNSPEC, SOCK_STREAM, 1) > 0)
+
+    if (selected_fd != -1) // We've already selected an fd
+      ::close(fd);
+    else if (sd_is_socket(fd, AF_UNSPEC, SOCK_STREAM, 1) > 0) // Found an appropriate fd
       selected_fd = fd;
-    else
+    else // It's some other type of fd, close it.
       ::close(fd);
   }