From 03bc93bd327e06e86af0b0c14a888f7482affedc Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Mon, 15 Jun 2026 13:11:30 +0200
Subject: [PATCH] servers: drop unix socket path attribute check on Windows

On Windows there is no `lstat()`, which was later substituted with
normal `stat()`, but on Windows `S_IFSOCK` is never defined, which meant
the output of stat was not actually used, reducing this to checking for
the presence of the file, and bailing out without retry if missing.

Follow-up to 30e491e5c921aecca5a16083d8185840dc64eccd #7034
Follow-up to 99fb36797a3f0b64ad20fcb8b83026875640f8e0

Cherry-picked from #22010

Closes #22021
---
 tests/server/util.c | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/tests/server/util.c b/tests/server/util.c
index a1c3dd87de..d6141aaf21 100644
--- a/tests/server/util.c
+++ b/tests/server/util.c
@@ -674,7 +674,6 @@ int bind_unix_socket(curl_socket_t sock, const char *unix_socket,
   curlx_strcopy(sau->sun_path, sizeof(sau->sun_path), unix_socket, len);
   rc = bind(sock, (struct sockaddr *)sau, sizeof(struct sockaddr_un));
   if(rc && SOCKERRNO == SOCKEADDRINUSE) {
-    curlx_struct_stat statbuf;
     int sockerr;
     /* socket already exists. Perhaps it is stale? */
     curl_socket_t unixfd = socket(AF_UNIX, SOCK_STREAM, 0);
@@ -693,21 +692,19 @@ int bind_unix_socket(curl_socket_t sock, const char *unix_socket,
              sockerr, curlx_strerror(sockerr, errbuf, sizeof(errbuf)));
       return rc;
     }
+#if !defined(_WIN32) && defined(S_IFSOCK) /* No lstat(), S_IFSOCK on Windows */
     /* socket server is not alive, now check if it was actually a socket. */
-#ifdef _WIN32
-    /* Windows does not have lstat function. */
-    if(curlx_stat(unix_socket, &statbuf)) {
-#else
-    if(lstat(unix_socket, &statbuf)) {
-#endif
-      logmsg("Error binding socket, failed to stat %s (%d) %s", unix_socket,
-             errno, curlx_strerror(errno, errbuf, sizeof(errbuf)));
-      return -1;
-    }
-#ifdef S_IFSOCK
-    if((statbuf.st_mode & S_IFSOCK) != S_IFSOCK) {
-      logmsg("Error binding socket, %s is not a socket", unix_socket);
-      return -1;
+    {
+      curlx_struct_stat statbuf;
+      if(lstat(unix_socket, &statbuf)) {
+        logmsg("Error binding socket, failed to stat %s (%d) %s", unix_socket,
+               errno, curlx_strerror(errno, errbuf, sizeof(errbuf)));
+        return -1;
+      }
+      if((statbuf.st_mode & S_IFSOCK) != S_IFSOCK) {
+        logmsg("Error binding socket, %s is not a socket", unix_socket);
+        return -1;
+      }
     }
 #endif
     /* dead socket, cleanup and retry bind */