linux-ext4 - [PATCH 2/5] e2image: eliminate division by zero

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Message-Id: <1388726998-14349-2-git-send-email-tytso@mit.edu>
Date:	Fri,  3 Jan 2014 00:29:55 -0500
From:	Theodore Ts'o <tytso@....edu>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	Theodore Ts'o <tytso@....edu>
Subject: [PATCH 2/5] e2image: eliminate division by zero

Dividing a floating point number by zero is undefined in C.  It
happens to work with gcc/glibc, but it's not something that's
guaranteed.

Addresses-Coverity-ID: #1147781

Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
 misc/e2image.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/misc/e2image.c b/misc/e2image.c
index 253fad1..ac62ffe 100644
--- a/misc/e2image.c
+++ b/misc/e2image.c
@@ -704,14 +704,15 @@ more_blocks:
 	if (show_progress) {
 		time_t duration = time(NULL) - start_time;
 		char buff[30];
-		while (bscount--)
-			fputc('\b', stderr);
+		fputc('\r', stderr);
 		strftime(buff, 30, "%T", gmtime(&duration));
-		fprintf(stderr, _("\b\b\b\b\b\b\b\bCopied %llu / %llu "
-			 "blocks (%d%%) in %s at %.2f MB/s       \n"),
-		       total_written, meta_blocks_count,
-		       calc_percent(total_written, meta_blocks_count), buff,
-		       calc_rate(total_written, fs->blocksize, duration));
+		fprintf(stderr, _("Copied %llu / %llu blocks (%d%%) in %s "),
+			total_written, meta_blocks_count,
+			calc_percent(total_written, meta_blocks_count), buff);
+		if (duration)
+			fprintf(stderr, _("at %.2f MB/s"),
+				calc_rate(total_written, fs->blocksize, duration));
+		fputs("       \n", stderr);
 	}
 #ifdef HAVE_FTRUNCATE64
 	if (sparse) {
-- 
1.8.5.rc3.362.gdf10213

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