From 3bd6a0f9f80e264e4ebbe54bfdc6a3b9ba0137e2 Mon Sep 17 00:00:00 2001
From: Stephen Miller <56742918+StevenMiller123@users.noreply.github.com>
Date: Sat, 31 Jan 2026 15:31:58 -0600
Subject: [PATCH] Skip stdin fd for want_read in select (#3983)

UE uses this to signal if it should read from stdin, real hardware never marks it as as readable
---
 src/core/libraries/kernel/file_system.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/libraries/kernel/file_system.cpp b/src/core/libraries/kernel/file_system.cpp
index 5330b90fd..4b5a53266 100644
--- a/src/core/libraries/kernel/file_system.cpp
+++ b/src/core/libraries/kernel/file_system.cpp
@@ -1262,7 +1262,8 @@ s32 PS4_SYSV_ABI posix_select(s32 nfds, fd_set_posix* readfds, fd_set_posix* wri
         if (file->type == Core::FileSys::FileType::Regular ||
             file->type == Core::FileSys::FileType::Device) {
             // Disk files always ready
-            if (want_read) {
+            // For devices, stdin (fd 0) is never read-ready.
+            if (want_read && i != 0) {
                 FD_SET_POSIX(i, &read_ready);
             }
             if (want_write) {