From 5285f83b77df9e206f4904eba92c741eb42acc93 Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Mon, 13 Dec 2021 13:19:18 +0100
Subject: include/c: add cmp_timespec() and cmp_stat_mtime()

It's like timercmp() in libc, but for timespec and for stat.st_mtim
(or stat.st_mtime for old struct stat versions).

Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=2180414
Upstream: http://github.com/util-linux/util-linux/commit/0cfb8c5c3205a92ae81def278cdded63ea47094f
Signed-off-by: Karel Zak <kzak@redhat.com>
---
 include/c.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/c.h b/include/c.h
index 354b59e29..01f0fa507 100644
--- a/include/c.h
+++ b/include/c.h
@@ -167,6 +167,24 @@
 	_a == _b ? 0 : _a > _b ? 1 : -1; })
 #endif
 
+
+#ifndef cmp_timespec
+# define cmp_timespec(a, b, CMP)		\
+	(((a)->tv_sec == (b)->tv_sec)		\
+	? ((a)->tv_nsec CMP (b)->tv_nsec)	\
+	: ((a)->tv_sec CMP (b)->tv_sec))
+#endif
+
+
+#ifndef cmp_stat_mtime
+# ifdef HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
+#  define cmp_stat_mtime(_a, _b, CMP)	cmp_timespec(&(_a)->st_mtim, &(_b)->st_mtim, CMP)
+# else
+#  define cmp_stat_mtime(_a, _b, CMP)	((_a)->st_mtime CMP (_b)->st_mtime)
+# endif
+#endif
+
+
 #ifndef offsetof
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
 #endif
-- 
2.39.2

