From f2a72027877e44434da4c264e17fa6475492988b Mon Sep 17 00:00:00 2001
From: Hood Chatham <roberthoodchatham@gmail.com>
Date: Thu, 10 Jul 2025 16:06:31 +0200
Subject: [PATCH 1/2] gh-127146: Report uid in Emscripten + node as native uid

Fixes `test_netrc.NetrcTestCase.test_security`, which was getting mad
that we reported the uid of a file correctly but reported the user's uid
as 0.
---
 Python/emscripten_syscalls.c | 17 +++++++++++++++++
 configure                    |  2 +-
 configure.ac                 |  2 +-
 3 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100644 Python/emscripten_syscalls.c

diff --git a/Python/emscripten_syscalls.c b/Python/emscripten_syscalls.c
new file mode 100644
index 00000000000000..6cd3fc5bf06063
--- /dev/null
+++ b/Python/emscripten_syscalls.c
@@ -0,0 +1,17 @@
+// If we're running in node, report the UID of the user in the native system as
+// the UID of the user. Since the nodefs will report the uid correctly, if we
+// don't make getuid report it correctly too we'll see some permission errors.
+// Normally __syscall_getuid32 is a stub that always returns 0 but it is
+// defined with weak linkage so we can override it.
+EM_JS(int, __syscall_getuid32_js, (void), {
+    // If we're in node and we can, report the native uid
+    if (typeof process !== "undefined" && typeof process.getuid === "function") {
+        return process.getuid();
+    }
+    // Fall back to the stub case of returning 0.
+    return 0;
+})
+
+int __syscall_getuid32(void) {
+    return __syscall_getuid32_js();
+}
diff --git a/configure b/configure
index 94a0b810333ce9..cc868bf47d441c 100755
--- a/configure
+++ b/configure
@@ -19060,7 +19060,7 @@ PLATFORM_OBJS=
 case $ac_sys_system in #(
   Emscripten) :
 
-    as_fn_append PLATFORM_OBJS ' Python/emscripten_signal.o Python/emscripten_trampoline.o'
+    as_fn_append PLATFORM_OBJS ' Python/emscripten_signal.o Python/emscripten_trampoline.o Python/emscripten_syscalls.o'
     as_fn_append PLATFORM_HEADERS ' $(srcdir)/Include/internal/pycore_emscripten_signal.h $(srcdir)/Include/internal/pycore_emscripten_trampoline.h'
    ;; #(
   *) :
diff --git a/configure.ac b/configure.ac
index ade71bc011eb87..727bfb1b3bf681 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5119,7 +5119,7 @@ PLATFORM_OBJS=
 
 AS_CASE([$ac_sys_system],
   [Emscripten], [
-    AS_VAR_APPEND([PLATFORM_OBJS], [' Python/emscripten_signal.o Python/emscripten_trampoline.o'])
+    AS_VAR_APPEND([PLATFORM_OBJS], [' Python/emscripten_signal.o Python/emscripten_trampoline.o Python/emscripten_syscalls.o'])
     AS_VAR_APPEND([PLATFORM_HEADERS], [' $(srcdir)/Include/internal/pycore_emscripten_signal.h $(srcdir)/Include/internal/pycore_emscripten_trampoline.h'])
   ],
 )

From 789681e1c662bb23a3546cff201cd42bcdb01353 Mon Sep 17 00:00:00 2001
From: Hood Chatham <roberthoodchatham@gmail.com>
Date: Sun, 13 Jul 2025 14:24:30 +0200
Subject: [PATCH 2/2] Add missing include

---
 Python/emscripten_syscalls.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Python/emscripten_syscalls.c b/Python/emscripten_syscalls.c
index 6cd3fc5bf06063..7875bfc8fe56ae 100644
--- a/Python/emscripten_syscalls.c
+++ b/Python/emscripten_syscalls.c
@@ -1,3 +1,5 @@
+#include "emscripten.h"
+
 // If we're running in node, report the UID of the user in the native system as
 // the UID of the user. Since the nodefs will report the uid correctly, if we
 // don't make getuid report it correctly too we'll see some permission errors.