From 4f2fb1e1f785bad22df8f3d96cb4792acf21f315 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
Date: Thu, 25 Oct 2018 09:57:07 +0200
Subject: [PATCH] musl: process-util
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Upstream-Status: Pending

Stolen from [1] and prettyfied slightly

[1] https://github.com/voidlinux/void-packages/tree/master/srcpkgs/NetworkManager/patches

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

---
 shared/systemd/src/basic/process-util.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/shared/systemd/src/basic/process-util.c b/shared/systemd/src/basic/process-util.c
index b0afb5c..7adc8bd 100644
--- a/shared/systemd/src/basic/process-util.c
+++ b/shared/systemd/src/basic/process-util.c
@@ -21,6 +21,9 @@
 #include <sys/wait.h>
 #include <syslog.h>
 #include <unistd.h>
+#ifndef __GLIBC__
+#include <pthread.h>
+#endif
 #if 0 /* NM_IGNORED */
 #if HAVE_VALGRIND_VALGRIND_H
 #include <valgrind/valgrind.h>
@@ -1168,11 +1171,13 @@ void reset_cached_pid(void) {
         cached_pid = CACHED_PID_UNSET;
 }
 
+#ifdef __GLIBC__
 /* We use glibc __register_atfork() + __dso_handle directly here, as they are not included in the glibc
  * headers. __register_atfork() is mostly equivalent to pthread_atfork(), but doesn't require us to link against
  * libpthread, as it is part of glibc anyway. */
 extern int __register_atfork(void (*prepare) (void), void (*parent) (void), void (*child) (void), void *dso_handle);
 extern void* __dso_handle _weak_;
+#endif
 
 pid_t getpid_cached(void) {
         static bool installed = false;
@@ -1201,7 +1206,11 @@ pid_t getpid_cached(void) {
                          * only half-documented (glibc doesn't document it but LSB does — though only superficially)
                          * we'll check for errors only in the most generic fashion possible. */
 
+#ifdef __GLIBC__
                         if (__register_atfork(NULL, NULL, reset_cached_pid, __dso_handle) != 0) {
+#else
+                        if (pthread_atfork(NULL, NULL, reset_cached_pid) != 0) {
+#endif
                                 /* OOM? Let's try again later */
                                 cached_pid = CACHED_PID_UNSET;
                                 return new_pid;