From: Jim Meyering <meyering@redhat.com>
Date: Sun, 30 Nov 2008 17:43:55 +0000 (+0100)
Subject: tests: dd/reblock: avoid occasional failure
X-Git-Tag: v7.1~118
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=be6b4218e47e27c591f589f27f543079d7930dce;p=thirdparty%2Fcoreutils.git

tests: dd/reblock: avoid occasional failure

* tests/dd/reblock: Sleep longer to avoid a race condition.
Reported by Bob Proulx.
---

diff --git a/tests/dd/reblock b/tests/dd/reblock
index 542529a714..ef9e036130 100755
--- a/tests/dd/reblock
+++ b/tests/dd/reblock
@@ -44,7 +44,10 @@ sed 's/,.*//' err > k && mv k err
 compare err exp-reblock || fail=1
 
 # Demonstrate that bs=N supersedes even following ibs= and obs= settings.
-(echo x; sleep .1; echo y) | dd bs=3 ibs=1 obs=1 > out 2> err || fail=1
+# Choosing a delay of 0.1 would result in an occasional lost race where
+# the consumer's first read would consume 3 bytes rather than the expected 2.
+# Not wanting to sleep a full second, I'll raise that to 0.3.
+(printf ab; sleep .3; printf cd) | dd bs=3 ibs=1 obs=1 > out 2> err || fail=1
 sed 's/,.*//' err > k && mv k err
 compare err exp-no-reblock || fail=1