From 184f20c56576300343b8f8b60a8bebb185074485 Mon Sep 17 00:00:00 2001
From: Steve Grubb <sgrubb@redhat.com>
Date: Fri, 26 Apr 2024 12:44:56 -0400
Subject: [PATCH] Use atomic_int if available for signal related flags


Reference:https://github.com/linux-audit/audit-userspace/commit/184f20c56576300343b8f8b60a8bebb185074485
Conflict:configure.ac

---
 configure.ac       | 8 ++++++++
 src/auditd-event.c | 5 ++++-
 src/auditd.c       | 9 ++++++---
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index f2f2950..96a0fcc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -85,6 +85,14 @@ AC_LINK_IFELSE(
  [AC_DEFINE(HAVE_STRNDUPA, 1, [Let us know if we have it or not])],
  []
 )
+
+AC_CHECK_HEADERS([stdatomic.h], [
+    AC_DEFINE([HAVE_ATOMIC], 1, [Define to 1 if you have the <stdatomic.h> header file.])
+    AC_DEFINE([ATOMIC_INT], atomic_int, [Define atomic_int if you have the <stdatomic.h> header file.])
+  ], [
+    AC_DEFINE([ATOMIC_INT], int, [Define to the type of an int if <stdatomic.h> is not available.])
+])
+
 dnl; pthread_yield is used in zos-remote
 AC_SEARCH_LIBS(pthread_yield, pthread, 
 	[AC_DEFINE(HAVE_PTHREAD_YIELD, 1, [Define to 1 if we have pthread_yield])], [])
diff --git a/src/auditd-event.c b/src/auditd-event.c
index 847f5fe..c1e4b5a 100644
--- a/src/auditd-event.c
+++ b/src/auditd-event.c
@@ -36,6 +36,9 @@
 #include <limits.h>     /* POSIX_HOST_NAME_MAX */
 #include <ctype.h>	/* toupper */
 #include <libgen.h>	/* dirname */
+#ifdef HAVE_ATOMIC
+#include <stdatomic.h>
+#endif
 #include "auditd-event.h"
 #include "auditd-dispatch.h"
 #include "auditd-listen.h"
@@ -45,7 +48,7 @@
 #include "auparse-idata.h"
 
 /* This is defined in auditd.c */
-extern volatile int stop;
+extern volatile ATOMIC_INT stop;
 
 /* Local function prototypes */
 static void send_ack(const struct auditd_event *e, int ack_type,
diff --git a/src/auditd.c b/src/auditd.c
index 34a9b57..75a180e 100644
--- a/src/auditd.c
+++ b/src/auditd.c
@@ -38,6 +38,9 @@
 #include <pthread.h>
 #include <sys/utsname.h>
 #include <getopt.h>
+#ifdef HAVE_ATOMIC
+#include <stdatomic.h>
+#endif
 
 #include "libaudit.h"
 #include "auditd-event.h"
@@ -62,7 +65,7 @@
 #define SUBJ_LEN 4097
 
 /* Global Data */
-volatile int stop = 0;
+volatile ATOMIC_INT stop = 0;
 
 /* Local data */
 static int fd = -1, pipefds[2] = {-1, -1};
@@ -72,8 +75,8 @@ static const char *state_file = "/var/run/auditd.state";
 static int init_pipe[2];
 static int do_fork = 1, opt_aggregate_only = 0, config_dir_set = 0;
 static struct auditd_event *cur_event = NULL, *reconfig_ev = NULL;
-static int hup_info_requested = 0;
-static int usr1_info_requested = 0, usr2_info_requested = 0;
+static ATOMIC_INT hup_info_requested = 0;
+static ATOMIC_INT usr1_info_requested = 0, usr2_info_requested = 0;
 static char subj[SUBJ_LEN];
 static uint32_t session;
 static int hup_flag = 0;
-- 
2.33.0