From 8327ec8edd8336d377e1f11e6b43406c26760234 Mon Sep 17 00:00:00 2001
From: Ariel Abreu <facekapow@outlook.com>
Date: Wed, 4 Oct 2023 23:34:10 -0400
Subject: [PATCH] Perform most of the same pre- and post-fork work in
 posix_spawn as in fork

---
 .../emulation/linux/process/posix_spawn.c         | 15 +++++++++++++--
 libsyscall/wrappers/_libkernel_init.h             |  3 +++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/darling/src/libsystem_kernel/emulation/linux/process/posix_spawn.c b/darling/src/libsystem_kernel/emulation/linux/process/posix_spawn.c
index 66a189e..50a74c8 100644
--- a/darling/src/libsystem_kernel/emulation/linux/process/posix_spawn.c
+++ b/darling/src/libsystem_kernel/emulation/linux/process/posix_spawn.c
@@ -27,6 +27,7 @@
 #include "../unistd/fchdir.h"
 #include "../fcntl/fcntl.h"
 #include "../dirent/getdirentries.h"
+#include "../../../libsyscall/wrappers/_libkernel_init.h"
 
 // for debugging only; remove before committing
 #include "../signal/kill.h"
@@ -40,6 +41,8 @@
 
 #define LINUX_ADDR_NO_RANDOMIZE 0x40000
 
+extern _libkernel_functions_t _libkernel_functions;
+
 long sys_posix_spawn(int* pid, const char* path, const struct _posix_spawn_args_desc* desc,
 		char** argvp, char** envp)
 {
@@ -53,14 +56,20 @@ long sys_posix_spawn(int* pid, const char* path, const struct _posix_spawn_args_
 	if (ret < 0)
 		return ret;
 
+	// we don't want to call user atfork callbacks, but we *do* want to call most
+	// libsystem atfork callbacks to set up the environment for some of the calls we need
+	// to make for the setup
+
+	_libkernel_functions->posix_spawn_prepare();
+
 	if ((my_pid = sys_fork()) == 0)
 	{
-		mach_driver_init(NULL);
-
 		// child
 		// close the reading side
 		close_internal(pipe[0]);
 
+		_libkernel_functions->posix_spawn_child();
+
 no_fork:
 		if (desc && desc->attrp)
 		{
@@ -343,6 +352,8 @@ fail:
 		// close the writing side
 		close_internal(pipe[1]);
 
+		_libkernel_functions->posix_spawn_parent();
+
 		if (my_pid < 0)
 		{
 			ret = my_pid;
diff --git a/libsyscall/wrappers/_libkernel_init.h b/libsyscall/wrappers/_libkernel_init.h
index 7ade448..cdc793e 100644
--- a/libsyscall/wrappers/_libkernel_init.h
+++ b/libsyscall/wrappers/_libkernel_init.h
@@ -71,6 +71,9 @@ typedef const struct _libkernel_functions {
 	/* Subsequent versions must only add pointers! */
 #ifdef DARLING
 	int (*dyld_func_lookup)(const char*,void**);
+	void (*posix_spawn_prepare)(void);
+	void (*posix_spawn_parent)(void);
+	void (*posix_spawn_child)(void);
 #endif
 } *_libkernel_functions_t;