linux-kernel - [PATCH 1/2] perf util: do_read should fail on EOF instead of busy-looping.

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Message-Id: <1249647361-11582-2-git-send-email-pierre.habouzit@intersec.com>
Date:	Fri,  7 Aug 2009 14:16:00 +0200
From:	Pierre Habouzit <pierre.habouzit@...ersec.com>
To:	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org, Pierre Habouzit <madcoder@...ian.org>
Subject: [PATCH 1/2] perf util: do_read should fail on EOF instead of busy-looping.

From: Pierre Habouzit <madcoder@...ian.org>

Signed-off-by: Pierre Habouzit <madcoder@...ian.org>
---
 tools/perf/util/header.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 450384b..531f2b9 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -185,6 +185,8 @@ static void do_read(int fd, void *buf, size_t size)
 
 		if (ret < 0)
 			die("failed to read");
+		if (ret == 0)
+			die("failed to read: missing data");
 
 		size -= ret;
 		buf += ret;
-- 
1.6.4.rc2.183.g9085a

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