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From ef1e0607b82e27350c2d677d649c6a0a9693fd40 Mon Sep 17 00:00:00 2001
From: Christian Brauner <brauner@kernel.org>
Date: Tue, 9 Aug 2022 16:27:40 +0200
Subject: build: detect sys/pidfd.h availability
Fixes: #4176
Signed-off-by: Christian Brauner (Microsoft) <christian.brauner@ubuntu.com>
---
meson.build | 1 +
src/lxc/process_utils.h | 6 ++++++
2 files changed, 7 insertions(+)
--- a/meson.build
+++ b/meson.build
@@ -734,6 +734,7 @@ foreach tuple: [
['sys/resource.h'],
['sys/memfd.h'],
['sys/personality.h'],
+ ['sys/pidfd.h'],
['sys/signalfd.h'],
['sys/timerfd.h'],
['pty.h'],
--- a/src/lxc/process_utils.h
+++ b/src/lxc/process_utils.h
@@ -15,6 +15,10 @@
#include <sys/syscall.h>
#include <unistd.h>
+#if HAVE_SYS_PIDFD_H
+#include <sys/pidfd.h>
+#endif
+
#include "compiler.h"
#include "syscall_numbers.h"
@@ -136,9 +140,11 @@
#endif
/* waitid */
+#if !HAVE_SYS_PIDFD_H
#ifndef P_PIDFD
#define P_PIDFD 3
#endif
+#endif
#ifndef CLONE_ARGS_SIZE_VER0
#define CLONE_ARGS_SIZE_VER0 64 /* sizeof first published struct */
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