From 00bfd25a6c4472c90bbf1fa184d1fb10b3b8fcf3 Mon Sep 17 00:00:00 2001
From: Soner Sayakci <s.sayakci@gmail.com>
Date: Fri, 4 Sep 2026 09:40:55 +0000
Subject: [PATCH] Fix php://fd/ on platforms without getdtablesize()

HAVE_UNISTD_H does not imply that getdtablesize() exists. Detect the
function at configure time and fall back to INT_MAX when it is missing,
matching the existing no-unistd path.
---
 configure.ac                     | 1 +
 ext/standard/php_fopen_wrapper.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index b1ff51bcc2d1..0356298ebd98 100644
--- a/configure.ac
+++ b/configure.ac
@@ -559,6 +559,7 @@ AC_CHECK_FUNCS(m4_normalize([
   funopen
   gai_strerror
   getcwd
+  getdtablesize
   getgrnam_r
   gethostname
   getloadavg
diff --git a/ext/standard/php_fopen_wrapper.c b/ext/standard/php_fopen_wrapper.c
index cca9445801f0..4f66ac892b78 100644
--- a/ext/standard/php_fopen_wrapper.c
+++ b/ext/standard/php_fopen_wrapper.c
@@ -346,7 +346,7 @@ static php_stream * php_stream_url_wrap_php(php_stream_wrapper *wrapper, const c
 			return NULL;
 		}
 
-#ifdef HAVE_UNISTD_H
+#ifdef HAVE_GETDTABLESIZE
 		dtablesize = getdtablesize();
 #else
 		dtablesize = INT_MAX;