From 07b94c9f327c0b3230022b55f8105249f205a739 Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Tue, 12 Feb 2019 13:27:56 +0100
Subject: [PATCH] lib/strutils: support two decimal places in
 size_to_human_string() output

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 include/strutils.h |  7 ++++---
 lib/strutils.c     | 15 +++++++++++----
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/include/strutils.h b/include/strutils.h
index 0c4679882..65d5259db 100644
--- a/include/strutils.h
+++ b/include/strutils.h
@@ -121,9 +121,10 @@ extern char *xstrmode(mode_t mode, char *str);
 /* Options for size_to_human_string() */
 enum
 {
-        SIZE_SUFFIX_1LETTER = 0,
-        SIZE_SUFFIX_3LETTER = 1,
-        SIZE_SUFFIX_SPACE   = 2
+	SIZE_SUFFIX_1LETTER  = 0,
+	SIZE_SUFFIX_3LETTER  = (1 << 0),
+	SIZE_SUFFIX_SPACE    = (1 << 1),
+	SIZE_DECIMAL_2DIGITS = (1 << 2)
 };
 
 extern char *size_to_human_string(int options, uint64_t bytes);
diff --git a/lib/strutils.c b/lib/strutils.c
index b71dde596..369d50159 100644
--- a/lib/strutils.c
+++ b/lib/strutils.c
@@ -551,6 +551,7 @@ char *size_to_human_string(int options, uint64_t bytes)
 	if (options & SIZE_SUFFIX_SPACE)
 		*psuf++ = ' ';
 
+
 	exp  = get_exp(bytes);
 	c    = *(letters + (exp ? exp / 10 : 0));
 	dec  = exp ? bytes / (1ULL << exp) : bytes;
@@ -569,11 +570,17 @@ char *size_to_human_string(int options, uint64_t bytes)
 	 *                 exp, suffix[0], dec, frac);
 	 */
 
+	/* round */
 	if (frac) {
-		/* round */
-		frac = (frac / (1ULL << (exp - 10)) + 50) / 100;
-		if (frac == 10)
-			dec++, frac = 0;
+		if (options & SIZE_DECIMAL_2DIGITS) {
+			frac = (frac / (1ULL << (exp - 10)) + 5) / 10;
+			if (frac % 10 == 0)
+				frac /= 10;	/* convert N.90 to N.9 */
+		} else {
+			frac = (frac / (1ULL << (exp - 10)) + 50) / 100;
+			if (frac == 10)
+				dec++, frac = 0;
+		}
 	}
 
 	if (frac) {